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  • VAE 400  (27)
  • VAE 120  (25)
  • thema EDItEUR::A The Arts  (24)
  • Universitätsverlag Göttingen  (73)
  • German  (73)
  • Swedish
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  • German  (73)
  • Swedish
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  • 1
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    Unknown
    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Description: The term childbed presents is understood to mean gifts that were presented to the mothers of new-born babies in childbed. Presents for the new mother given for example during visits by relatives, friends and neighbours, initially consisted of food and drink. Later they could also include applied art objects. The custom of presenting childbed presents has a long tradition and still partially continues until today. In the present study, applied art objects which can be identified as childbed presents are analyzed and discussed in relation to their art historical development from the early modern period to the early 19th century. In regard to their cultural and historical context, questions about the form, content and function of these gifts will be investigated. In doing so a special field of early modern art and culture becomes accessible for the first time.
    Keywords: childbed presents ; historical development ; early modern art ; thema EDItEUR::A The Arts
    Language: German
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  • 2
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Description: The basement of the façade of the San Rufino at Assisi is part of the newly erected Cathedral, which can be dated between 1140 and about 1240. Its extensive décor shows the self-confidence of its sole initiators, the Canons of the Cathedral. On the one hand the present treatise is addressed at the differentiated planar structuring on behalf of a large-scaled framing with a salient arched corbel course and the debate of its derivation. Thereby the framing of the reliefs next to the main portal on the façade of San Pietro fuori le mura at Spoleto receives specific consideration, also in comparison with the different types of relief-framing of several churches in the southwestern Mediterranean area. On the other hand the diversified decorative repertoire of the façade-basement at Assisi is brought into focus in this treatise. In this context special attention is paid to the so far rudimentarily investigated motives of the presentations, their origin and distribution.
    Keywords: San Rufino Assisi ; architecture ; décor ; thema EDItEUR::A The Arts
    Language: German
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  • 3
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Keywords: Videoperformance ; Photography ; Drawings ; Joseph Beuys ; thema EDItEUR::A The Arts ; thema EDItEUR::A The Arts::AF The Arts: art forms::AFK Non-graphic and electronic art forms::AFKP Performance art ; thema EDItEUR::A The Arts::AJ Photography and photographs::AJT Photographic equipment and techniques: general::AJTV Video photography / videography
    Language: German
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  • 4
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Description: A few weeks before van Gogh admitted himself into a mental hospital in Saint-Rémy in spring 1889 he had written to Gauguin that he wanted to create a “consolatory art for distressed hearts”. From his bedroom in the clinic he overlooked an enclosed wheat field. Over the course of a year the seasonal changes inspired Van Gogh to paint a cycle of this wheat field, thereby seeing it as an allegorical representation of the fate of human life, which comforted him.
    Description: Ein paar Wochen, bevor van Gogh sich im Frühjahr 1889 in eine Nervenklinik in Saint-Rémy einwies, hatte er an Gauguin geschrieben, dass er eine "Kunst des Trostes für zerrissene Herzen" schaffen wollte. Vom Fenster seines Schlafzimmers in der Klinik blickte er auf ein ummauertes Kornfeld herab. Im Laufe eines Jahres inspirierten die jahreszeitlichen Veränderungen auf dem Feld Van Gogh dazu, einen Zyklus dieses Kornfeldes zu malen und es als allegorische Darstellung des Schicksals des menschlichen Lebens aufzufassen, das ihm dadurch Trost zu spenden vermochte.
    Keywords: van Gogh ; cycle ; wheat field ; thema EDItEUR::A The Arts
    Language: German
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  • 5
    Publication Date: 2024-03-23
    Description: Zu den besonderen Schätzen der Göttinger Universitätskunstsammlung gehören 129 Zeichnungen auf 92 Blatt sowie drei Skizzenbücher von Eduard Bendemann (1811-1889). Kulturell vielseitig vernetzt, war dieser Künstler einer der bedeutendsten Vertreter der Düsseldorfer Malerschule und sorgte gerade in den 1830er und 40er Jahren mit seinen Gemälden europaweit für großes Aufsehen. Der umfangreiche Göttinger Bendemann-Bestand wird hier erstmals vollständig in einem Katalog vorgestellt, der zugleich als Begleitband zu einer Ausstellung dieser Werke fungiert. Einen Großteil der hier präsentierten Zeichnungen schuf Bendemann als vorbereitende Studien zu komplexen Historienbildern. Vor den Gemälden: Eduard Bendemann zeichnet – unter diesem Motto gewähren Katalog und Ausstellung Einblicke in die faszinierende Welt akademischer Komponierpraxis des 19. Jahrhunderts und führen zugleich in deren historische und (kunst-)politische Grundlagen ein. Sie widmen sich einer Zeit, die von fundamentalen Umbrüchen, aber auch einem nahezu unerschütterlichen Vertrauen in die Wirkung von Kunst geprägt wurde.
    Description: Zu den besonderen Schätzen der Göttinger Universitätskunstsammlung gehören 129 Zeichnungen auf 92 Blatt sowie drei Skizzenbücher von Eduard Bendemann (1811-1889). Kulturell vielseitig vernetzt, war dieser Künstler einer der bedeutendsten Vertreter der Düsseldorfer Malerschule und sorgte gerade in den 1830er und 40er Jahren mit seinen Gemälden europaweit für großes Aufsehen. Der umfangreiche Göttinger Bendemann-Bestand wird hier erstmals vollständig in einem Katalog vorgestellt, der zugleich als Begleitband zu einer Ausstellung dieser Werke fungiert. Einen Großteil der hier präsentierten Zeichnungen schuf Bendemann als vorbereitende Studien zu komplexen Historienbildern. Vor den Gemälden: Eduard Bendemann zeichnet – unter diesem Motto gewähren Katalog und Ausstellung Einblicke in die faszinierende Welt akademischer Komponierpraxis des 19. Jahrhunderts und führen zugleich in deren historische und (kunst-)politische Grundlagen ein. Sie widmen sich einer Zeit, die von fundamentalen Umbrüchen, aber auch einem nahezu unerschütterlichen Vertrauen in die Wirkung von Kunst geprägt wurde.
    Keywords: Drawings ; Sketchbooks ; Sketches for complex history paintings ; Bleistift ; Eduard Bendemann ; Kunsthandel ; Papier ; Recto ; Skizze ; thema EDItEUR::A The Arts ; thema EDItEUR::A The Arts::AG The Arts: treatments and subjects::AGA History of art ; thema EDItEUR::3 Time period qualifiers::3M c 1500 onwards to present day::3MN 19th century, c 1800 to c 1899 ; thema EDItEUR::A The Arts::AF The Arts: art forms::AFF Drawing and drawings
    Language: German
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  • 6
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Description: A few weeks before van Gogh admitted himself into a mental hospital in Saint-Rémy in spring 1889 he had written to Gauguin that he wanted to create a “consolatory art for distressed hearts”. From his bedroom in the clinic he overlooked an enclosed wheat field. Over the course of a year the seasonal changes inspired Van Gogh to paint a cycle of this wheat field, thereby seeing it as an allegorical representation of the fate of human life, which comforted him.
    Keywords: van Gogh ; cycle ; wheat field ; thema EDItEUR::A The Arts
    Language: German
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  • 7
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Description: Die bei Plantin-Moretus um 1600 in Antwerpen gedruckten, von Jan David SJ verfassten und durch Theodoor Galle aufwendig illustrierten Andachtsbücher werden erstmals vollständig und systematisch, unter Berücksichtigung der Texte und zugehöriger Bilder, vorgestellt und untersucht. Deren komplexe Kupfersticherfindungen sind nicht – wie bislang angenommen – Emblemvarianten, sondern stellen ein gänzlich anders funktionierendes System der Text- und Bild-Synthese dar. Der jeweiligen Andachts-, Erbauungs- oder Lehrfunktion entsprechend verbildlichen die Kupferstiche Allegorisierungen moralischer und religiöser Didaxe, bildinterne Lettern und beigefügte Erläuterungen erschließen Inhalte und stellen den Bezug zu den verbildlichten Texten her. Analyse der unterschiedlichen Text-Bild-Verschränkungen in den vier Büchern, Herleitung der Buchstabenverweissysteme, buchgeschichtliche Einordnung, Entstehungsumstände, Konzeptionsgeschichte, funktionale Bestimmungen und Rezeptionen der Bücher und Bilder werden umfassend geklärt. Neben Veridicus Christianus (1601), Occasio Arrepta Neglecta (1605), Paradisus Sponsi et Sponsae (1607) und Duodecim Specula (1610) wurde auch das umfangreiche und viel rezipierte, von Boetius a Bolswert illustrierte Via Vitae Aeternae (1620) des Antoine Sucquet SJ ausführlich behandelt.
    Description: The devotional books printed by Plantin-Moretus in Antwerp around 1600, written by Jan David SJ and lavishly illustrated by Theodoor Galle, are presented and examined for the first time completely and systematically, taking into account the texts and associated images. Their complex copperplate engravings are not - as previously assumed - emblem variants, but represent a completely different system of text and image synthesis. According to the respective devotional, edifying, or teaching function, the copperplate engravings illustrate allegorizations of moral and religious didacticism; letters within the image and attached explanations make the contents accessible and establish the reference to the illustrated texts. Analysis of the different text-image interweavings in the four books, derivation of the letter reference systems, book-historical classification, circumstances of origin, history of conception, functional determinations and receptions of the books and images are comprehensively clarified. In addition to Veridicus Christianus (1601), Occasio Arrepta Neglecta (1605), Paradisus Sponsi et Sponsae (1607), and Duodecim Specula (1610), the extensive and much-received Via Vitae Aeternae (1620) by Antoine Sucquet SJ, illustrated by Boetius a Bolswert, was also treated in detail. Translated with www.DeepL.com/Translator (free version)
    Keywords: devotional books ; Catholicism ; allegory ; Antwerpen ; Emblem (Kunstform) ; Galle ; Jesuiten ; Kupferstich ; thema EDItEUR::A The Arts
    Language: German
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  • 8
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Keywords: stained-glass windows ; St. Jacobi church ; reformation ; thema EDItEUR::A The Arts
    Language: German
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  • 9
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Description: Johann Friedrich von Uffenbach was a wealthy scion of a Frankfurt patrician family, of hereditary nobility, and the younger brother of Zacharias Conrad (1683-1734), one of the greatest book collectors and manuscript specialists of his time. He first studied under the mathematical rationalist Enlightenment philosopher Christian Wolff (1679-1754) in Halle before earning a law degree from the University of Strasbourg in 1714. As a European traveler, he kept detailed travel diaries and lived in Frankfurt as a private scholar with technical, natural history and artistic interests, a collector of books, instruments, paintings, drawings and prints. His enthusiasm for everything technical, measurable and newly invented led to experimental learning in a wide variety of fields, but - since there was no compulsion to earn a living - rarely to long-term employment. Practical evidence of Uffenbach's activities are, for example, a renovated bridge over the Main, various large fireworks, diverse music and an opera as well as some copperplate engravings. His scientific activities are documented in handwritten records, such as more than 8,000 pages of travel diaries, five volumes of minutes of meetings of his learned society founded in Frankfurt, numerous letters and manuscripts of unpublished writings: Uffenbach enjoyed traveling, learning, reading and testing, but the breadth of his studies was more important to him than their depth. Uffenbach's own handwritten catalogs and inventories of the collections correlated manuscripts with printed books in the library, instruments, models, drawings, and copper engravings. The result was a complex, multi-part working tool that he bequeathed in 1736 to the newly founded University of Göttingen, which received it after his death in 1770. Translated with www.DeepL.com/Translator (free version)
    Keywords: Uffenbach ; inventory ; scientific research ; thema EDItEUR::A The Arts
    Language: German
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  • 10
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Keywords: Göttingen ; painters ; graphic artists ; sculptors ; architects ; thema EDItEUR::A The Arts
    Language: German
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  • 11
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Keywords: Art ; thema EDItEUR::A The Arts ; thema EDItEUR::A The Arts::AF The Arts: art forms::AFC Paintings and painting ; thema EDItEUR::V Health, Relationships and Personal development::VF Family and health::VFX Parenting: advice and issues::VFXC Child care and upbringing: advice for parents ; thema EDItEUR::Y Children’s, Teenage and Educational::YN Children’s / Teenage: General interest::YNA Children’s / Teenage general interest: Art and artists
    Language: German
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  • 12
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Keywords: Drawings ; Sketchbooks ; Sketches for complex history paintings ; thema EDItEUR::A The Arts ; thema EDItEUR::A The Arts::AG The Arts: treatments and subjects::AGA History of art ; thema EDItEUR::3 Time period qualifiers::3M c 1500 onwards to present day::3MN 19th century, c 1800 to c 1899 ; thema EDItEUR::A The Arts::AF The Arts: art forms::AFF Drawing and drawings
    Language: German
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  • 13
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Description: Die Kunstsammlung der Universität Göttingen ist vor allem für ihren Bestand an Niederländischer Kunst des 17. Jahrhunderts bekannt. Dass sie darüber hinaus auch eine Kollektion von Gemälden des 19. Jahrhunderts umfasst, die einige wirkliche Schätze enthält, gleicht einer Neuentdeckung. Diese Kollektion wird hier erstmals in einem eigenen Bestandskatalog vorgestellt. Obwohl es sich um eine eher kleine Sammlung handelt, erweist sich diese doch als erstaunlich repräsentativ, um das Kunstverständnis des 19. Jahrhunderts mit seinen wechselnden Prämissen sowie kunsttheoretischen und künstlerischen Auseinandersetzungen an konkreten Kunstwerken aufzuzeigen. Eine zentrale Rolle spielt dabei die Gattungstheorie: Die seit der Frühen Neuzeit vertretene Ausdifferenzierung der Malerei in profane und religiöse Historie, Genre, Landschaft, Stillleben, Tierstück und Porträt wurde über das gesamte 19. Jahrhundert hinweg kontrovers diskutiert, blieb aber als wertsetzendes System lange präsent. Der vorliegende, von Dozenten und Studierenden des Kunstgeschichtlichen Seminars der Universität Göttingen gemeinsam erarbeitete Bestandskatalog nutzt die Gattungstheorie als „roten Faden“, um eine historische Perspektive auf den Bestand der Gemälde des 19. Jahrhunderts in der Göttinger Universitätskunstsammlung anzubieten.
    Description: Die Kunstsammlung der Universität Göttingen ist vor allem für ihren Bestand an Niederländischer Kunst des 17. Jahrhunderts bekannt. Dass sie darüber hinaus auch eine Kollektion von Gemälden des 19. Jahrhunderts umfasst, die einige wirkliche Schätze enthält, gleicht einer Neuentdeckung. Diese Kollektion wird hier erstmals in einem eigenen Bestandskatalog vorgestellt. Obwohl es sich um eine eher kleine Sammlung handelt, erweist sich diese doch als erstaunlich repräsentativ, um das Kunstverständnis des 19. Jahrhunderts mit seinen wechselnden Prämissen sowie kunsttheoretischen und künstlerischen Auseinandersetzungen an konkreten Kunstwerken aufzuzeigen. Eine zentrale Rolle spielt dabei die Gattungstheorie: Die seit der Frühen Neuzeit vertretene Ausdifferenzierung der Malerei in profane und religiöse Historie, Genre, Landschaft, Stillleben, Tierstück und Porträt wurde über das gesamte 19. Jahrhundert hinweg kontrovers diskutiert, blieb aber als wertsetzendes System lange präsent. Der vorliegende, von Dozenten und Studierenden des Kunstgeschichtlichen Seminars der Universität Göttingen gemeinsam erarbeitete Bestandskatalog nutzt die Gattungstheorie als „roten Faden“, um eine historische Perspektive auf den Bestand der Gemälde des 19. Jahrhunderts in der Göttinger Universitätskunstsammlung anzubieten.
    Keywords: Art Collection of the University of Göttingen ; 19th century ; genre theory ; inventory Catalogue ; art history ; Landschaftsmalerei ; Malerei ; thema EDItEUR::A The Arts ; thema EDItEUR::A The Arts::AG The Arts: treatments and subjects::AGA History of art ; thema EDItEUR::3 Time period qualifiers::3M c 1500 onwards to present day::3MN 19th century, c 1800 to c 1899 ; thema EDItEUR::A The Arts::AF The Arts: art forms::AFC Paintings and painting::AFCL Paintings and painting in oils
    Language: German
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  • 14
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Keywords: Kurt Schwitters ; "Merz"-Kunst ; Dadaism ; thema EDItEUR::A The Arts
    Language: German
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  • 15
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    Universitätsverlag Göttingen
    Publication Date: 2024-04-02
    Keywords: Ancient Studies ; Music ; Babylonia ; thema EDItEUR::N History and Archaeology::NH History::NHB General and world history ; thema EDItEUR::A The Arts ; thema EDItEUR::A The Arts::AG The Arts: treatments and subjects::AGA History of art ; thema EDItEUR::6 Style qualifiers::6C Styles (C)::6CA Classical style ; thema EDItEUR::N History and Archaeology::NH History
    Language: German
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  • 16
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Keywords: architecture ; architectural drawing ; exhibition catalog ; thema EDItEUR::A The Arts
    Language: German
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  • 17
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Keywords: History of Arts ; History of Science ; thema EDItEUR::A The Arts ; thema EDItEUR::A The Arts::AG The Arts: treatments and subjects::AGA History of art ; thema EDItEUR::P Mathematics and Science::PD Science: general issues::PDX History of science
    Language: German
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  • 18
    Publication Date: 2024-03-23
    Description: Presenting the previously unpublished lecture notes of ‘Über das Leben Raffaels von Urbino’ by Carl Wilhelm Friedrich Oesterley, a lecture series given in spring 1841 at the University of Göttingen, this edition sheds light on a major step contribution to the research on Raphael and academic teaching in the 19th century. The manuscript draws on the seminal study of Johann David Passavant on Raphael and his father Giovanni Santi, published two years earlier in 1839. The volume presents a collection of studies on Oestlerley’s role within the reception of Raphael in the Romanticism and on his career as painter, arthistorian and as curator of the university art collection in Göttingen. Based on numerous original sources, the edition offers an insight into the academic teaching in the mid-19th century.
    Description: Mit dem Manuskript der Vorlesung Über das Leben Raffaels von Urbino, welche Carl Wilhelm Friedrich Oesterley erstmals im Sommersemester 1841 an der Göttinger Universität hielt, wird ein bedeutendes Zeugnis der Raffael-Forschung sowie der kunstgeschichtlichen Lehrpraxis des 19. Jahrhunderts der wissenschaftlichen Öffentlichkeit vorgestellt. Erst zwei Jahre vor Entstehung des Manuskripts war im Jahr 1839 Johann David Passavants überaus einflussreiche Publikation über Raffael und seinen Vater Giovanni Santi erschienen. Oesterleys Position im Kontext der romantischen Raffael-Rezeption, sein Werdegang als Maler und Kunsthistoriker sowie seine Tätigkeit als Kustos der Göttinger Universitätskunstsammlung werden in einleitenden Aufsätzen behandelt. Auf Grundlage zahlreicher erhaltener Quellen bietet diese Edition einen exemplarischen Einblick in die kunsthistorische Lehre der Mitte des 19. Jahrhunderts.
    Keywords: Carl Wilhelm Friedrich Oesterley ; Raffael von Urbino ; 19. Jahrhundert ; thema EDItEUR::A The Arts
    Language: German
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  • 19
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Keywords: Mezzotint ; 18th Century ; Painting reproduction ; Gravure ; thema EDItEUR::A The Arts ; thema EDItEUR::A The Arts::AB The arts: general topics::ABC Conservation, restoration and care of artworks ; thema EDItEUR::A The Arts::AG The Arts: treatments and subjects::AGA History of art ; thema EDItEUR::3 Time period qualifiers::3M c 1500 onwards to present day::3MN 19th century, c 1800 to c 1899
    Language: German
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  • 20
    Publication Date: 2024-03-23
    Description: Sichtlich evangelisch – das sind in der mittelalterlichen Jacobikirche in Göttingen vor allem die Glasfenster von 1900/01. Im Zuge einer umfassenden Innenrenovierung wurden hier um die Jahrhundertwende reformationsgeschichtliche Ereignisse und reformatorische Glaubensüberzeugungen in Bilder gefasst. Heute zeugen diese Fenster von der ganz eigenen, nicht selten aktualisierenden Sicht auf die Reformationszeit. Gleichzeitig geben sie Einblicke in das eindrucksvolle künstlerische Vermögen der ausführenden Glasmaler. Der vorliegende Katalog stellt diese Fenster zum ersten Mal in umfassender Weise vor. Er erschließt ihre Entwurfsgeschichte, ihr theologisches und künstlerisches Programm sowie ihre gestalterische Ausführung. Weiterführende Beiträge widmen sich der historistischen Renovierung der Jacobikirche, in deren Zusammenhang die Fenster entstanden, sowie dem Schaffen der bedeutenden Hannoveraner Glasmalwerkstätten Henning & Andres sowie Lauterbach & Schröder, das hier erstmals für die Forschung erschlossen wird.
    Description: Sichtlich evangelisch – das sind in der mittelalterlichen Jacobikirche in Göttingen vor allem die Glasfenster von 1900/01. Im Zuge einer umfassenden Innenrenovierung wurden hier um die Jahrhundertwende reformationsgeschichtliche Ereignisse und reformatorische Glaubensüberzeugungen in Bilder gefasst. Heute zeugen diese Fenster von der ganz eigenen, nicht selten aktualisierenden Sicht auf die Reformationszeit. Gleichzeitig geben sie Einblicke in das eindrucksvolle künstlerische Vermögen der ausführenden Glasmaler. Der vorliegende Katalog stellt diese Fenster zum ersten Mal in umfassender Weise vor. Er erschließt ihre Entwurfsgeschichte, ihr theologisches und künstlerisches Programm sowie ihre gestalterische Ausführung. Weiterführende Beiträge widmen sich der historistischen Renovierung der Jacobikirche, in deren Zusammenhang die Fenster entstanden, sowie dem Schaffen der bedeutenden Hannoveraner Glasmalwerkstätten Henning & Andres sowie Lauterbach & Schröder, das hier erstmals für die Forschung erschlossen wird.
    Keywords: stained-glass windows ; St. Jacobi church ; reformation ; Chor (Architektur) ; Glasmalerei ; Göttingen ; Hauptkirche Sankt Jacobi (Hamburg) ; Kanzel ; thema EDItEUR::A The Arts
    Language: German
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  • 21
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Keywords: Italian Futurism ; aesthetics ; painting ; thema EDItEUR::A The Arts
    Language: German
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  • 22
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    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Description: Cord Borgentrik (about 1430-1501) was a quite successful image carver with an own large studio in Braunschweig in the second half of the 15th century. Traces of his activity which show the influence of Dutch realism are to be found in the region of Braunschweig, in Westphalia, in the region around Goettingen, Gandersheim, and in Halle. The study discusses two of his major altarpieces that have survived. It focusses on how iconography and spiritual message of the works are dependent on the ideas of Borgentrik´s monastic commissioners. The Mary Retable of the parish church of Hemmerde in Westphalia which was completed in 1483 and even signed by Borgentrik (now in the Städtische Museum Braunschweig) was commissioned by the Premonstratensian monks of the monastery of Scheda, whereas the Mary Retable of St. Nicolai church in Alfeld (Lower Saxony), which long can be found in the Minoritenkirche Cologne, was commissioned by the Cistercian monks of Marienrode. In both cases Mary is shown as Regina Coeli in the way the Byzantine Hodegetria is represented. The study analyzes the Christological and Mariological presuppositions that underlie the iconography of both retables.
    Keywords: sculptor ; history of art ; regina coeli ; thema EDItEUR::A The Arts
    Language: German
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  • 23
    facet.materialart.
    Unknown
    Universitätsverlag Göttingen
    Publication Date: 2024-03-23
    Description: Die Stadt Göttingen beherbergt viele und wichtige mittelalterliche Kirchen. Das Panorama der Baugeschichten, der Nutzungen und der Formenvielfalt reicht vom 13. zum 16. Jahrhundert und sogar bis in die Gegenwart, da die Kirchen auch später immer wieder verändert worden sind. Die Kirchenbauten sind das sichtbarste Zeugnis einer längst vergangenen Epoche. Das Buch hebt diesen Schatz und nimmt den Leser auf eine Zeitreise mit, bei der die sechs erhaltenen Kirchen in bisher nie dagewesener Weise ausführlich untersucht werden.
    Description: Die Stadt Göttingen beherbergt viele und wichtige mittelalterliche Kirchen. Das Panorama der Baugeschichten, der Nutzungen und der Formenvielfalt reicht vom 13. zum 16. Jahrhundert und sogar bis in die Gegenwart, da die Kirchen auch später immer wieder verändert worden sind. Die Kirchenbauten sind das sichtbarste Zeugnis einer längst vergangenen Epoche. Das Buch hebt diesen Schatz und nimmt den Leser auf eine Zeitreise mit, bei der die sechs erhaltenen Kirchen in bisher nie dagewesener Weise ausführlich untersucht werden.
    Keywords: Göttingen ; church building ; medieval architecture ; Altar ; Chor (Architektur) ; Kirchenschiff ; Langhaus (Kirche) ; Paulinerkirche (Leipzig) ; Sakristei ; St. Albani (Göttingen) ; Strebewerk ; thema EDItEUR::A The Arts
    Language: German
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  • 24
    Publication Date: 2024-03-23
    Description: Double-talented artists were particularly numerous during the period of expressionism, which was characterized by political and radical social changes. The book presented offers informations about the artists’ motivations and focuses on two excellent examples of artistic double-talent - Oskar Kokoschka, the founder of drama expressionism and Ludwig Meidner, highly praised for his apocalyptic landscapes. The interdisciplinary comparison of paintings and graphics with the dramas, poems and prose texts written by the artists allows offers valuable insights into their entire expressionistic oevre and, at the same time, a closer understanding of the relationship between art and literature.
    Description: Der Expressionismus als Bewegung zu Beginn des 20. Jahrhunderts erfasste Künstler, Literaten und Musiker gleichermaßen und legte wichtige Grundlagen für die Entwicklung der modernen Kunst. Außergewöhnlich hoch ist in dieser Zeit die Zahl doppelbegabter Künstler, die gedrängt vom Willen zu gesellschaftlichem Umbruch und inspiriert von neuesten Erkenntnissen aus Philosophie und Wissenschaft ihren expressiven und emotional aufgeladenen künstlerischen Ausdruck in verschiedenen Medien suchten. Untersuchungen zeitgenössischer Texte geben Aufschluss über die Voraussetzungen zum doppelbegabten Schaffen, das wieder historische Vergleich zeigt, nie zuvor in solcher Intensität stattgefunden hat. Hervorragende Beispiele expressionistischer Doppelbegabung sind Oskar Kokoschka – prominenter Künstler und „Begründer des Dramenexpressionismus“ – und Ludwig Meidner, der für seine apokalyptischen Landschaften einst hoch gerühmt wurde. Der Vergleich ihrer Gemälde und Grafiken mit ihren Dramen, Gedichten und Prosatexten erlaubt interessante, tiefergehende Einblicke in ihre Intentionen und die Bandbreite ihrer Themen. Zugleich ermöglicht der interdisziplinäre Ansatz ein eingehenderes Verständnis für ihr expressionistisches Gesamtoeuvre und die Bezüge zwischen Kunst und Literatur.
    Keywords: literature ; oskar kokoschka ; double talent ; modern art ; expressionism ; ludwig meidner ; Apokalypse ; thema EDItEUR::A The Arts ; thema EDItEUR::A The Arts::AG The Arts: treatments and subjects::AGA History of art ; thema EDItEUR::6 Style qualifiers::6E Styles (E)::6EF Expressionism ; thema EDItEUR::D Biography, Literature and Literary studies
    Language: German
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  • 25
    Publication Date: 2021-03-29
    Description: Seit dem Mesozoikum wächst die kontinentale Kruste am aktiven Plattenrand von Kamtschatka durch Akkretion allochthoner Terrane. Dieses Wachstum manifestiert sich in der differenziellen Exhumierung und Hebung tektonischer Blöcke innerhalb des Akkretionskeils, parallel zum Kamtschatka- Graben. Die Kinematik der Exhumierung soll mittels strukturgeologischer und neotektonischer Deformationsanalyse erfasst und mit thermochronologischen Untersuchungen an Apatiten bis etwa ins Untere Pliozän quantifiziert werden.
    Description: conference
    Keywords: 551 ; VAE 880 ; VAE 400 ; VBN 500 ; VEG 190 ; Passive und aktive Kontinentalränder {Geologie} ; Tektogenese {Geologie} ; Geochronologie einzelner Regionen im allgemeinen ; Koriakia-Kamtchatkasystem {Geologie} ; Kamtschatka 〈Oblast〉 ; Kontinentalrand ; Deformation 〈Geologie〉 ; Hebung 〈Geologie〉
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 26
    Publication Date: 2021-03-29
    Description: Die Grenze zwischen zwei ophiolithischen Decken der penninischen Alpen, der Zermatt-Saas-Zone (unten) und der Combinzone (oben), markiert zugleich einen bedeutenden Sprung der bei der tertiären alpinen Metamorphose maximal erreichten Drücke. Während die Zermatt-Saas-Zone Ultrahochdruckmetamorphose (25–30 kbar/550–600°C, Bucher et al. 2005) erfuhr, erreichte die Combinzone lediglich blauschieferfazielle Bedingungen (13–18 kbar/380– 550°C, Bousquet et al. 2004). Vor allem die Polarität des Drucksprunges führte dazu, daß die Deckengrenze zumeist als gewaltige südostvergente Abschiebung interpretiert wurde (z.B. Ballèvre & Merle 1993, Reddy et al. 1999). Strukturgeologische Geländebeobachtungen ergeben jedoch sowohl für das Hangende als auch das Liegende der Combinstörung die folgende kinematische Entwicklung: i) Nordwestvergente, überschiebende Scherung (D1), ii) (Süd)westvergente Scherung (D2),iii) Südostvergente, abschiebende Scherung (D3). Alle drei Deformationsphasen fanden in beiden Einheiten unter grünschieferfaziellen Bedingungen statt... Die Rekonstruktion ergibt, daß die Combinstörung hauptsächlich als Überschiebung aktiv war. Die Exhumierung der Gesteinseinheiten im Liegenden wurde nicht durch Extension, sondern durch vertikale Ausdünnung der Kruste während horizontaler Kontraktion bewirkt.
    Description: conference
    Keywords: 551 ; VAE 811 ; VAE 400 ; VEB 168 ; VAE 140 ; Alpidische Orogene {Geologie} ; Tektogenese {Geologie} ; Schweizer Alpen {Geologie} ; Gesteinsdeformation {Strukturgeologie} ; Penninikum ; Tektonische Decke ; Scherzone ; Deformation 〈Geologie〉 ; Hebung 〈Geologie〉
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 27
    Publication Date: 2021-03-29
    Description: Microscopic study is an indispensable step in the determination of the petrographic characteristics of rocks. In Cameroon just like in most developing countries, simple polarizing microscopes of the 20th Century constitute the only available material for macroscopic studies. A major difficulty encountered in the use of these instruments resides in the realisation of photographs of the different parts of the thin section that require illustrations. The technique that has been used upto now has been inefficient and unsatisfactory. Faced with this recurrent situation, we thought of setting up a new, semi-modern, practical and very economical technique for photographing the thin section.
    Description: conference
    Keywords: 551 ; VAE 120 ; VGB 400 ; VKA 130 ; Methodik {Strukturgeologie} ; Optische Bestimmungsmethoden {Mineralogie} ; Optische Petrographie ; Dünnschliffmikroskopie ; Mikrofotographie
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 28
    Publication Date: 2021-03-29
    Description: Intense seismicity and intensely developed active and ancient fault systems are common to the Aegean Region. Extending/ thinning crust involves a complex interplay of (1) Gulf of Corinth riftexpansion, (2) west- and south-ward retreat of the Hellenic Trench, (3) westward impingement of the Anatolian Platen, and/or (4) propagation of the Anatolian Fault system into the Aegean. New geological/structural investigations on Kea (also known as Tzia), in the Western Cyclades reveal a low angle crustal-scale, detachment-type ductile shear zone probably formed during Miocene extension and thinning of the continental crust...
    Description: conference
    Keywords: 551 ; VEF 300 ; VAE 130 ; VKB 270 ; VAE 400 ; Griechenland und griechische Inseln {Geologie} ; Geomechanik ; Produkte mechanischer Deformation {Petrologie} ; Tektogenese {Geologie} ; Kea ; Erdkruste ; Extension 〈Geologie〉 ; Scherzone
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 29
    facet.materialart.
    Unknown
    Universitätsverlag Göttingen
    Publication Date: 2021-03-29
    Description: Gruppen von parallel einfallenden Abschiebungen treten in der Natur sehr häufig und in unterschiedlichsten Dimensionen auf. Existierende, überwiegend experimentelle Arbeiten führen einheitliches Einfallen auf laterale Festigkeitsschwankungen oder, vor allem, auf horizontale Scherspannungen zurück (e.g. Brun et al. 1994, Behn et al. 2002). Einheitliche horizontale Scherspannungen im großen Maßstab werden mit einer konsistenten Fließrichtung in der mittleren und/oder unteren Kruste erklärt. Beobachtungen in einigen der bedeutensten Rift-Systeme lassen jedoch beide Erklärungen als zentrale Ursache unwahrscheinlich erscheinen. In der Basin-and-Range-Provinz in den westlichen Vereinigten Staaten ändert sich die Einfallrichtung von parallelen Abschiebungen im Streichen der Störungen, so dass strukturelle Domänen mit intern einheitlicher Einfallrichtung entstehen, die von Blattverschiebungen untereinander getrennt werden. Eine solche Geometrie ließe sich nur mit bizarren Fließmustern in der Unterkruste erklären. Wir präsentieren numerische Extensionsexperimente von sprödem Material, das auf einem linear-viskosen Substrat ruht... In unseren Modell sind parallele Abschiebungen nicht, wie bisher angenommen, auf einheitlichen horizontalen Scherstress, sondern auf vertikale Normalspannungen zurückzuführen, d.h. auf den Widerstand, den das viskose Substrat vertikalen Blockbewegungen in der spröden Lage entgegensetzt. Wenn unser Modell richtig ist, würde das für Gebiete wie die Basin-and- Range-Provinz bedeuten, dass die spröde Oberkruste auf einer wenige Kilometer dicken, viskosen mittleren Kruste liegt, die wiederum ein festeres Substrat hat. Die Unterkruste müsste deutlich fester sein als die mittlere Kruste. Es scheint, dass Folgen von parallelen Abschiebungen häufig in dünnen, niedrig viskosen Lagen (etwa Ton oder Salz) wurzeln.
    Description: conference
    Keywords: 551 ; VAE 830 ; VAE 130 ; VAE 120 ; VBE 000 ; Bruchschollenstrukturen {Geologie} ; Geomechanik ; Methodik {Strukturgeologie} ; Modellierung von Prozessen in der Geosphäre ; Bruchscholle ; Abschiebung 〈Geologie〉 ; Geomechanik ; Numerisches Modell
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 30
    Publication Date: 2021-03-29
    Description: The 1.85 Ga Sudbury Igneous Complex (SIC) in central Ontario is now widely considered to be the erosional remnant of a deformed paleo-horizontal impact melt sheet, about 2.5 km in thickness. Deformed impact melt breccias of the Onaping Formation and postimpact metasedimentary rocks overlie the layered SIC, which in turn rests on shocked Archean basement and Paleoproterozoic cover rocks. The main mass of the Igneous Complex is subdivided from top to bottom into granophyre, quartz-gabbro and norite layers. Previous workers considered noncylindrical folding and NW-directed reverse faulting as the main structural processes that formed the asymmetric, syn-formal geometry of the SIC apparent in map view and seismic section. Structural studies support this model in the southern part of the impact structure, where greenschist-facies metamorphic tectonites of the South Range Shear Zone (SRSZ) accomplished structural uplift of the southern SIC by NW-directed reverse shearing. However, little evidence for pervasive ductile strain has been reported from the weakly metamorphosed eastern part of the SIC, the East Range, which is characterised by steep basal dips and maximal curvature in plan view. The objective of this study is to assess the structural inventory of the East Range in terms of post-emplacement deformation mechanisms. Our interpretation is based on published and newly acquired structural data. Planar mineral shape fabrics of cumulate plagioclase and pyroxene are developed in the intermediate quartz-gabbro and lower norite layers of the southern East Range SIC. Microstructures show little intracrystalline deformation in quartz. Euhedral cumulate plagioclase retains an angular outline indicating magmatic mineral fabric development. This magmatic foliation is concordant to SIC contacts or large-scale discontinuities in their vicinity (Fig. 1). Magmatic fabrics are observed rarely in the northern portion of the East Range. Here, tectonic foliations and S–C fabrics are developed sporadically at, and concordant to, brittle structures striking N–S. A weak tectonic foliation defined by chlorite that replaces magmatic minerals is developed in the upper granophyric SIC of the NE-lobe that connects the SIC’s North and East Ranges via a 105° arc. This foliation grades into a shape-preferred orientation of primary, i.e., magmatic, mafic minerals observed in the lower granophyre and underlying layers of the SIC. Mineral fabrics observed in the NE-lobe SIC are concordant to metamorphic foliations developed in the overlying Onaping Formation breccias. Both foliations strike parallel to the NE-Lobe’s acute bisectrix and, thus, display an axial-planar geometry typical for fabrics formed in the core of a buckle fold (Fig. 1). Brittle structures including centimetre-scale shear-fractures to kilometre-scale faultzones are observed in the eastern SIC and its host rocks. Largescale faults striking N–S cut the NElobe’s eastern limb causing variable magnitudes of strike separation of SIC contacts. Centimetre- to metrescale, brittle faults and chlorite-filled brittle-ductile shear-zones occur pervasively in the eastern SIC, often causing centimetre-scale offset of markers. Microstructures from first-order fault-zones indicate deformation at, and below, greenschist-facies metamorphic conditions. The concordance of magmatic and tectonic mineral shape fabrics in the NElobe indicates progressive deformation of the SIC during cooling from the magmatic state to lower greenschistfacies metamorphic conditions. Synmagmatic deformation of the SIC suggests that it was emplaced during ongoing orogenic deformation. Furthermore, maximum principal stress directions inferred from inversion of faultslip data collected in the Onaping Formation are orthogonal to metamorphic foliation surfaces at the same localities. This points to a similar deformation regime in the Onaping Formation during ductile and brittle deformation. The concordance of magmatic, metamorphic and brittle fabrics is explained best by a single progressive deformation event that was active while the SIC cooled and solidified. The lack of pervasive ductile deformation fabrics in the East Range SIC can be explained by rapid cooling of the impact melt sheet (within 100–500 ka) with respect to natural tectonic strain rates. While the geometry of mineral fabrics in the study area is compatible with large-scale, non-cylindrical folding, the low levels of ductile deformation suggest that shape-change of the eastern SIC has been accomplished mainly by discontinuous deformation. This deformation mechanism may have accomplished bulk NW-SE shortening that was accommodated by reverse shearing within the SRSZ, resulting in large strike separations of SIC contacts observed in the western part of the impact structure. By contrast, the eastern SIC may have accomplished such shortening by brittleductile, non-cylindrical folding at the eastern terminus of the SRSZ. The complex post-impact deformation pattern of the central Sudbury Structure results from impact into an active orogen.
    Description: conference
    Keywords: 551 ; VEV 127 ; VAE 150 ; VKB 280 ; VAE 400 ; Ontario {Geologie} ; Strukturelle Erscheinungen {Strukturgeologie} ; Impaktgesteine {Petrologie} ; Tektogenese {Geologie} ; Sudbury 〈Ontario, Region〉 ; Mehrfachringbassin ; Tiefengestein ; Impaktmetamorphes Gestein ; Deformation 〈Geologie〉
    Language: German
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  • 31
    Publication Date: 2021-03-29
    Description: The anisotropy of magnetic susceptibility (AMS) can serve as a good indicator of strain in deformed carbonate rocks with diamagnetic susceptibility (Owens and Rutter 1978; de Wall 2000). However, the magnetic fabric due to the diamagnetic carbonate minerals is usually very weak and interpretation of the AMS in these rocks is often complicated by the presence of paramagnetic and ferromagnetic phases which overprint the diamagnetic subfabric. For this reason contributions from ferromagnetic and paramagnetic minerals to the AMS should be separated for a reliable interpretation of the AMS. Ferromagnetic contributions to the AMS can be separated by high-field measurements, using a torque magnetometer (Martin- Hernandez and Hirt 2001). The remaining paramagnetic and diamagnetic contributions can be discriminated by their different temperature dependencies. The paramagnetic susceptibility increases as an inverse function of temperature, whereas the diamagnetic part remains constant. Altogether, AMS measurements at high fields and low temperatures allow for the discrimination of all three subfabrics. Test measurements with the high-field torque magnetometer at liquid nitrogen temperature were performed. It is possible to keep the specimens at low temperature over the measurement period using a cryostat. The main problem is the suppression of mechanical disturbances during the measurement so that the sensitivity of the instrument is retained. The torque of paramagnetic minerals increases strongly at low temperature which results in an amplification of the paramagnetic subfabric. The quantitative separation of diamagnetic and paramagnetic subfabric is under investigation. The result is promising when there is a significant diamagnetic signal.
    Description: conference
    Keywords: 551 ; TQB 000 ; TOT 310 ; VAE 120 ; Erdmagnetische Verfahren {Geophysik} ; Gesteinsmagnetismus {Geophysik} ; Methodik {Strukturgeologie} ; Magnetische Suszeptibilität ; Drehmagnetometer
    Language: German
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  • 32
    Publication Date: 2021-03-29
    Description: Im nördlichen Teil des Appenin in Italien ist der metamorphe Komplex der Alpi Apuane in Form eines tektonischen Fensters sehr gut aufgeschlosssen. Die metamorphen Gesteine der Alpi Apuane — Metakarbonate, Kiesel- und Karbonatschiefer sowie Phyllite — sind aufgrund der Kollision der korsischsardischen Mikroplatte mit der italienischen Halbinsel im mm bis km- Maßstab verfaltet worden. Im zentralen Teil der Alpi Apuane biegt das generelle N–S Streichen der Faltenstrukturen in eine E–W Richtung um. Faltenstrukturen mit senkrecht zueinander stehenden Faltenachsen sind charakteristisches Strukturmerkmal u.a. ‘Metamorpher Kernkomplexe’ und Schlüssel zum Verständnis von Deformationsgeschichte und mechanismen. Die Entwicklung dieser Strukturen wird kontrovers diskutiert...
    Description: conference
    Keywords: 551 ; VEF 200 ; VKB 292 ; VKB 270 ; VKA 200 ; VAE 140 ; VAE 120 ; Italien {Geologie} ; Metamorphe Komplexe, übriges Europa {Petrologie} ; Produkte mechanischer Deformation {Petrologie} ; Gefügekunde der Gesteine ; Gesteinsdeformation {Strukturgeologie} ; Methodik {Strukturgeologie} ; Apuaner Alpen ; Karbonatgestein ; Marmor ; Deformation 〈Geologie〉 ; Faltentektonik ; Gefüge 〈Gesteinskunde〉
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 33
    facet.materialart.
    Unknown
    Universitätsverlag Göttingen
    Publication Date: 2021-03-29
    Description: Regional strains in tectonically active volcanic provinces may have a profound influence on the mode of collapse caldera formation. Conversely, the deformation pattern, more specifically, the symmetry of plan-view strain fields imparted to caldera floors may assist in elucidating the regional deformation active during caldera formation. The symmetry of plan-view strain fields is chiefly controlled by the mode of floor subsidence, particularly whether subsidence is uniform, symmetric or asymmetric, portraying collapse mechanisms known respectively as plate, downsag and trapdoor. Plate and downsag subsidence generates centro-symmetric strain fields characterized by radial and concentric discontinuities and subvolcanic dikes. Such strain fields appear to develop preferably where magma pressure controls collapse. By contrast, rectilinear horizontal strain fields form under unidirectional stretching and generate normal faults and subvolcanic dikes transverse to the stretching direction. Rectilinear strain fields are typical for trapdoor subsidence but also for straight orogenic belts and suggests that the formation of both may be related. This was tested for six central Andean collapse calderas that formed between 10.5 and 2Ma and are located on prominent NW–SE striking fault zones. A combined geochronological and structural analysis of the Miocene Negra Muerta Caldera in particular was designed to better understand caldera formation associated with the prominent Olacapato – El Toro Fault Zone...
    Description: conference
    Keywords: 551 ; VAE 150 ; VEX 100 ; VAD 300 ; VAE 400 ; VAE 200 ; Strukturelle Erscheinungen {Strukturgeologie} ; Anden {Geologie} ; Vulkanformen und Vulkantypen {Geologie} ; Tektogenese {Geologie} ; Geodynamik der Lithosphäre {Geologie} ; Zentralanden ; Caldera ; Einsturzstruktur ; Deformation 〈Geologie〉 ; Geodynamik
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 34
    Publication Date: 2021-03-29
    Description: The Upper Rhine Graben forms the major segment of the Cenozoic Rift system of Western Europe. Although the rift was the target of many seismic and geological investigations, the style of lithospheric extension below the inferred faults, the depth to detachment, and the amounts of horizontal extension and lateral translation are still being debated. In this study, the date base to the Upper Rhine Graben was subjected to a finite element approach in order to include thermomechanical processes of the lithosphere as well as erosion and sedimentation. The study concentrated on the consequences of extension and lateral translational events on the structure and evolution in terms of basin geometry, sediment layer thicknesses, Moho elevation, and shoulder uplift on a lithospheric scale. The numerical approach was three dimensional in order to incorporate the lateral crustal heterogenities in the Upper Rhine area and the varying ambient stress field...
    Description: conference
    Keywords: 551 ; VEB 145 ; VAE 840 ; VAE 400 ; VAE 120 ; VBE 000 ; Rhein-Main-Tiefland {Geologie} ; Rifts {Geologie} ; Tektogenese {Geologie} ; Methodik {Strukturgeologie} ; Modellierung von Prozessen in der Geosphäre ; Oberrheingraben ; Tektonik ; Rifting ; Numerisches Modell
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 35
    Publication Date: 2021-03-29
    Description: Geology as a science has an important visual component and the knowledge of any geologist is deeply linked to visual experience of rock outcrops, thin sections and analytical images. One of the shortcomings of most geological images such as maps, cross sections and outcrop photographs is that they are 2D, while processes geologists are interested in are typically occurring in 3D space. The 3D geometry of faults, fractures and joints is crucial to quantify geological processes related to fracture mechanics, such as hydrothermal mineralization and ground water flow, but also geotechnical problems such as rock mass stability. A number of studies have shown that some geological structures can be described with a scale invariant, fractal distribution. So far these observations on which these findings are based were restricted to one and two dimensions and has been difficult to obtain a full spatial geometric picture of fracture sets from rock outcrops, because much of the rock is not directly accessible. However, without taking into account the spatial distribution of geological structures the true geometry of joint patterns cannot be fully described and scaling laws, fractal or not, cannot be derived. We present images of joint patterns based on datasets acquired by digital photographs which are processed to three dimensional images using the photogrammetry software Siro3D. This technique allows to obtain a highly accurate 3D picture of the visible outcrop. The spatial pattern of joints in nature is investigated using the software SiroJoint. For the analysis of joint systems a large data set was collected from the Heavitree Quarzite at Ormiston Gorge, near Alice Springs. The Heavitree Quartzite is fragmented by a spectacularly regular three-dimensional joint pattern, which is repeated at different scales and therefore represents a perfect laboratory for our investigations (Hobbs 1993). Siro3D generates a spatially fully referenced 3D image from overlapping digital images, such that each pixel of the image is assigned spatial coordinates. The software SiroJoint routinely constructs planes from the intersection of the rock-face with the linear trace of planar features (Poropat 2001). It provides stereographic plots of structural elements and additionally measures joint persistence, area, and joint spacing. Our measurements allow to analyse geometrical scaling relationships of joint sets with high accuracy and will help explore the character of their 3D complexity. Several hundred joint planes were defined with SiroJoint in an Ormiston Gorge outcrop. Three different joint sets can be distinguished. Joint set one and two are characterized by steeply inclined planes with joint spacings ranging between 2 cm to 40 cm and 2 cm to 10m respectively. Both joints sets depict a power law distribution in joint spacing/frequency plots. The third set is defined by a subhorizontal orientation. It shows a very regular spacing in the meter scale and lacks an exponential distribution. We intend to use the results as a basis to compare observed fracture pattern with those generated by computational methods like Iterated Function Systems. This might help to understand how physical rock properties influence the spatial complexity of fracture systems and develop constitutive scaling relationships for certain rock types.
    Description: conference
    Keywords: 551 ; VAE 120 ; VBH 000 ; VAE 150 ; Methodik {Strukturgeologie} ; Fernerkundung ; Strukturelle Erscheinungen {Strukturgeologie} ; Klüftung ; Bruch 〈Geologie〉 ; Photogrammetrie ; Dreidimensionale Rekonstruktion
    Language: German
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  • 36
    Publication Date: 2021-03-29
    Description: Grain boundary migration during dynamic recrystallization of quartz results in grain boundary suturing of various extent. The geometry of the sutured boundaries is affected not only by temperature, strain rate, finite strain and differential stress, but also by internal properties such as the defect distribution and crystallographic orientations. Consequently, the grain boundary geometry may provide information about these conditions and properties. In continuation of a previous study (Kuntcheva et al.) the complete crystallographic orientation of quartz grain boundaries was measured, based on a combination of electron backscatter diffraction (EBSD) and universal-stage (U-stage) measurements. For this purpose a sample of granite from the northern Aar Massif (Central Alps, Switzerland) was taken, deformed at temperatures up to 300–350°C at the end of the Lepontine event of the Alpine Orogenesis...
    Description: conference
    Keywords: 551 ; VKA 200 ; VAE 120 ; VAE 130 ; Gefügekunde der Gesteine ; Methodik {Strukturgeologie} ; Geomechanik ; Aare-Massiv ; Granitgneis ; Quarz ; Rekristallisationstextur
    Language: German
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  • 37
    Publication Date: 2021-03-29
    Description: Lokalisierung unter retrograden Deformationsbedingungen kann häufig in groß-maßstäblichen Scherzonen beobachtet werden. Dabei nimmt die Scherzonenbreite kontinuierlich ab. Gleichzeitig passt sich das Gefüge (Korngröße, Kornform, Kornorientierung, Zwillingsdichte, kristallographische Orientierung, usw.) den neuen Umgebungsbedingungen (Temperatur, Spannung und Verformungsrate) an. Die Glarner Hauptüberschiebung in den Ostschweizer Alpen ist ein gutes Beispiel, um das Ausmaß und die Entwicklung einer Verformungslokalisierung zu bestimmen. In der Vergangenheit wurde sie detailliert in Hinblick auf ihre Isotopenverteilung und daraus resultierenden Fluidbewegungen und Überprägungen untersucht. Dies erlaubt das Zusammenspiel der Lokalisierung und der Fluidüberprägung zur Zeit der Platznahme der Glarnerdecke zu bestimmen...
    Description: conference
    Keywords: 551 ; VAE 130 ; VAE 400 ; VAE 150 ; VJC 400 ; VEB 168 ; Geomechanik ; Tektogenese {Geologie} ; Strukturelle Erscheinungen {Strukturgeologie} ; Fluid-Gestein-Wechselwirkungen {Geochemie} ; Schweizer Alpen {Geologie} ; Glarner Alpen ; Scherzone ; Deformation 〈Geologie〉 ; Fluid-Fels-System
    Language: German
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  • 38
    Publication Date: 2021-03-29
    Description: Structural analysis of Paleozoic Middle and Upper Austroalpine (MAA, UAA) units of the Gurktal Nappe Complex (GNC) in combination with electron microprobe analyses of multiphase garnets reveal a complex Variscan and Alpidic tectonometamorphic evolution of the GNC. Our study is focussed on the UAA ‘Murau Nappe’ and its tectonic transition to the MAA respectively to the overlying UAA Stolzalpen Nappe. The ‘Murau Nappe’ may rather be interpreted as a major zone of imbricate thrust slices of the underlying and overlying units than a distinct nappe. The results of our study lead to a reinterpretation of the ‘Murau Nappe’ as a major shear zone generated during the Eo-Alpine thrusting of the Stolzalpen Nappe over the MAA. Concerning the central GNC we conclude, that the genetic term ‘Murau Nappe’ for the lower UAA unit between MAA and Stolzalpen Nappe is not valid. Instead, its reinterpretation as a major shear zone (‘Murau shear zone’), genetically belonging to the MAA, generated during Eo-Alpine overthrusting of the Stolzalpen Nappe, is favoured. The Mesozoic Stangalm unit is interpreted as a local sequence imbricated during the northward movement of the MAA units.
    Description: conference
    Keywords: 551 ; VEB 163 ; VAE 400 ; VKB 291 ; VAE 811 ; Zentrale Ostalpen {Geologie} ; Tektogenese {Geologie} ; Metamorphe Komplexe, Alpen {Petrologie} ; Alpidische Orogene {Geologie} ; Gurktaler Decke ; Alpidische Gebirgsbildung ; Tektogenese ; Metamorphose 〈Geologie〉
    Language: German
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  • 39
    Publication Date: 2021-03-29
    Description: Die Insel Kreta bildet den südlichen Rand der externen Helleniden, welche üblicherweise in zwei Deckenstapel untergliedert werden: Die unteren Decken (Plattenkalk und Phyllit-Quarzit- Einheit) sind durch eine alpidische HP-Metamorphose (Oligozän/Miozän) gekennzeichnet (Seidel et al. 1982, Jolivet et al. 1996), welche im Hangenden bislang nicht nachgewiesen wurde. Die Oberen Decken (i.w. Tripolitza- und Pindos-Einheit) bestehen aus karbonatischen Gesteinen und sind für eine petrologische PT-Abschätzung ungeeignet. Aufgrund des Gesteinshabitus wurden sie als unmetamorph eingestuft. Schlußfolgernd wird der Kontakt der beiden Stapel seit etwa zwanzig Jahren als krustales Megadetachment (‚Kreta- Detachment‘) aufgefaßt (Jolivet et al. 1996, Fassoulas et al. 1994, Kilias et al. 1994), wobei Versatzbeträge von über 100km angenommen werden (Ring et al. 2001, 2001). Ziel dieser Arbeit ist es Gemeinsamkeiten und Unterschiede der unmittelbar an das Detachment angrenzenden Einheiten herauszuarbeiten, um Rückschlüsse auf die tatsächliche Signifikanz der Störungszone zu ziehen.
    Description: conference
    Keywords: 551 ; VEF 000 ; VAE 140 ; VAE 400 ; VKA 200 ; VKB 292 ; VKB 250 ; Südeuropa und Mittelmeergebiet {Geologie} ; Gesteinsdeformation {Strukturgeologie} ; Tektogenese {Geologie} ; Gefügekunde der Gesteine ; Metamorphe Komplexe, übriges Europa {Petrologie} ; Metasedimente {Petrologie} ; Kreta ; Abscherung ; Deformation 〈Geologie〉 ; Alpidische Gebirgsbildung ; Metamorphose 〈Geologie〉
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 40
    Publication Date: 2021-03-29
    Description: The EZ is an approximately 20km long and 2–3km wide coherent unit of the Tauern Window in the Eastern Alps. It is sandwiched between the Venedigerand the Glockner Nappe. While rocks in the EZ experienced HP metamorphic conditions (24 kbar/650°C), rocks from the underlying Venediger Nappe and the overlying Glockner Nappe only record lower alpine metamorphic conditions with peak pressures not exceeding 10 and 8 kbar, respectively. While metamorphism in the EZ is well dated with an average age of 31.5±0.7Ma (Glodny et al. 2005) the final emplacement of these different nappes is still under debate. Our Rb-Sr-data indicate that top-N thrusting at the base and large-scale folding of the EZ was coeval with sinistral strike-slip faulting at its upper boundary and eclogite-facies metamorphism in the EZ. The data also indicate that today’s nappe architecture must have been established in less than 2Ma after the eclogite facies metamorphism in the EZ. Very fast exhumation of the EZ was accomplished in a transpressional setting, which might explain why the exposed EZ is such a small unit.
    Description: conference
    Keywords: 551 ; VEB 163 ; VKB 291 ; VAE 400 ; VBN 500 ; VAE 811 ; Zentrale Ostalpen {Geologie} ; Metamorphe Komplexe, Alpen {Petrologie} ; Tektogenese {Geologie} ; Geochronologie einzelner Regionen im allgemeinen ; Alpidische Orogene {Geologie} ; Tauernfenster ; Decke 〈Geologie〉 ; Eklogit ; Rubidium-Strontium-Methode ; Überschiebung ; Oligozän
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 41
    Publication Date: 2021-03-29
    Description: The tectonic history of the Kamchatka Peninsula is dominated by continuous accumulation and amalgamation of terranes with different origins, which were delivered by convergence between the Pacific plate and in former times, the Kula plate against Eurasia (Freitag, 2002). The Kronotsky and Cape Kamchatka Peninsulas show that the collision of terranes and the resulting tectonics are still important for major parts of East-Kamchatka. While the collision of the Kronotsky Peninsula is sorely influenced by the convergence of the Pacific plate, the Cape Kamchatka Peninsula is affected by the collision of the Aleutian Arc with Kamchatka, what gives the opportunity to compare two different processes that resulted in the amalgamation of terranes to Kamchatka.
    Description: conference
    Keywords: 551 ; VEG 190 ; VAE 400 ; VAE 300 ; VAE 120 ; VBJ 000 ; Koriakia-Kamtchatkasystem {Geologie} ; Tektogenese {Geologie} ; Epirogenese {{Geologie}} ; Methodik {Strukturgeologie} ; Satellitenbildgeologie ; Kamtschatka 〈Oblast〉 ; Neotektonik ; Fernerkundung
    Language: German
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  • 42
    Publication Date: 2021-03-29
    Description: In den vergangenen Jahren wurden von den Mitgliedern unseres Departments mehrere Feldstudien über elektromagnetische Emissionen in tektonisch aktiven Regionen durchgeführt. Die Untersuchungsgebiete lagen in Südspanien, Sizilien, Malta, Eger-Graben/Tschechische Republik und die Provence/Frankreich als auch in Süd-Chile. Das Ziel dieser Untersuchungen war die Erfassung der größten horizontalen Spannungs-Richtung in der oberen Erdkruste. Dazu wurden die Intensität des elektromagnetischen Feldes in Bezug zu der Orientierung einer Richtantenne gemessen. Diese Ergebnisse wurden mit aktiven Stress-Richtungen verglichen die aus Doorstopper-Messungen, Bohrloch- Randausbrüchen, Herdflächenlösungen und neotektonischen Strukturanalysen gewonnen wurden. Die Richtungen der größten Horizontalspannungen stimmen sehr gut mit der Orientierung der maximalen elektromagnetischen Emission überein.
    Description: conference
    Keywords: 551 ; VAE 120 ; VAE 130 ; TQD 000 ; Methodik {Strukturgeologie} ; Geomechanik ; Elektrische Verfahren {Geophysik} ; Erdkruste ; Spannung 〈Geologie〉 ; Spannungszustand ; Elektromagnetisches Verfahren
    Language: German
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  • 43
    Publication Date: 2021-03-29
    Description: Metamorphic rocks approaching the crustal scale brittle-ductile transition (BDT) during exhumation are expected to become increasingly affected by short term stress fluctuations related to seismic activity in the overlying seismogenic layer (schizosphere), while still residing in a long-term viscous environment (plastosphere). The structural and microstructural record of quartz veins in low grade – high pressure metamorphic rocks from southern Evia, Greece, yields insight into the processes and conditions just beneath the long-term BDT at temperatures of about 300 to 350°C, with switches between brittle failure and viscous flow as a function of imposed stress or strain rate...
    Description: conference
    Keywords: 551 ; VAE 400 ; VAE 150 ; VKB 130 ; VEF 300 ; Tektogenese {Geologie} ; Strukturelle Erscheinungen {Strukturgeologie} ; Petrologie der Ganggesteine ; Griechenland und griechische Inseln {Geologie} ; Euböa ; Krustenbewegung ; Hydraulische Rissbildung ; Bruch 〈Geologie〉 ; Quarzgang
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 44
    Publication Date: 2021-03-29
    Description: The multidetector texture diffractometer SKAT (from Russian: Spektrometer Kolitshestvennovo Analiza Tekstury) at the pulsed reactor IBR-2 in Dubna, Russia, started operation in March 1997 and is open for users from all countries. Application of time-of-flight (TOF) diffraction to texture measurements offers the opportunity to record complete diffraction patterns, i.e., to measure several pole figures simultaneously. To allow high spectral resolution for measurements on polyphase geological samples with many diffraction patterns, the instrument was placed at the end of an over 100m long flight path. In this paper, we will summarize advantages and disadvantages of the SKAT, as well as intended improvements.
    Description: conference
    Keywords: 551 ; VAE 120 ; VGA 440 ; VGB 900 ; VKA 200 ; Methodik {Strukturgeologie} ; Sonstige Methoden {Mineralogie: Kristallographie} ; Sonstige: Luminiszens etc. {Mineralogie} ; Gefügekunde der Gesteine ; Dubna ; SKAT ; Neutronendiffraktrometer ; Neutronendiffraktrometrie ; Texturanalyse
    Language: German
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  • 45
    Publication Date: 2021-03-29
    Description: Aus der Verteilung und Lage tertiärer und quartärer Ablagerungen in Mitteleuropa lassen sich tertiäre Paläooberflächen rekonstruieren. Die spätere Verstellung dieser Oberflächen erlaubt es, die vertikalen Krustenbewegungen der jüngeren und jüngsten geologischen Vergangenheit zu quantifizieren. Diese Hebungs- und Senkungsbewegungen sind nur wenig durch die lokale Heraushebung der mitteldeutschen Mittelgebirge beeinflusst. Sie sind vor allem die Folge sehr großräumiger Verstellungen der Erdkruste zwischen Nordsee und Fichtelgebirge, bei denen Prozesse im Erdmantel einen entscheidenden Einfluss im großräumigen (mitteleuropäischen) Maßstab haben.
    Description: conference
    Keywords: 551 ; VAG 130 ; VEB 210 ; VAE 400 ; VAE 120 ; VBF 000 ; Paläogeomorphologie {Geomorphologie} ; Deutschland {Geologie} ; Tektogenese {Geologie} ; Methodik {Strukturgeologie} ; Elektronische Datenverarbeitung in der Geologie ; Mitteldeutschland ; Tertiär ; Quartär ; Hebung 〈Geologie〉 ; Rezente Krustenbewegung ; Geoinformationssystem ; Fossile Erdoberfläche ; Rekonstruktion
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 46
    Publication Date: 2021-03-29
    Description: The Lower Saxony Basin (LSB) is a part of the post-Variscan Central European Basin System. We used a 3-D reflection seismic dataset in the northern LSB, provided by RWE-DEA AG, Hamburg (c.f. Lohr et al. submitted) for our investigation, which is concerned with the detailed structural and kinematic analysis of a flower structure within Mesozoic strata. This data is used in turn to determine input parameters for further 3-D geometrical retro-deformation. The retro-deformation verifies our assumptions about the structure and tectonic processes, and gives further information about sub-seismic strain distribution with respect to the branch faults of the flower structure.
    Description: conference
    Keywords: 551 ; TQC 220 ; TSB 000 ; VAE 820 ; VAE 830 ; VEB 110 ; VAE 120 ; VBE 000 ; Reflexionsseismik {Geophysik} ; Mitteleuropa {Geophysik} ; Sedimentationsbecken als Erdkrustentypen {Geologie} ; Bruchschollenstrukturen {Geologie} ; Norddeutsche Senke {Geologie} ; Methodik {Strukturgeologie} ; Modellierung von Prozessen in der Geosphäre ; Niedersächsiches Becken ; Dreidimensionale Seismik ; Strukturgeologie ; Modell
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 47
    Publication Date: 2021-03-29
    Description: Electromagnetic radiation (EMR) as measured at the surface of the lithosphere or underground shows preferred orientations, which can be related to microcracks and other brittle structures at micro and nano scales (see Bahat et al. 2005 and references therein). During the last years, numerous studies showed the applicability of EMR measurements for the determination of active fractures and stress orientations. EMR is determined with a ‘Cerescope’, which picks up EMR signals at frequencies from 5– 50 kHz (Obermeyer, 2005) with a ferrite aerial and processes them electronically so that the results can be displayed on a screen or copied to a computer. With the help of oriented EMR measurements, intensity variations are determined, which can be related to preferred crack fracture orientations. From this information, orientations of the principal stresses can be calculated. In addition, the intensity of the EMR is related to stress magnitudes...
    Description: conference
    Keywords: 551 ; TQD 000 ; VAE 120 ; VAE 150 ; VAE 140 ; Elektrische Verfahren {Geophysik} ; Methodik {Strukturgeologie} ; Strukturelle Erscheinungen {Strukturgeologie} ; Gesteinsdeformation {Strukturgeologie} ; Lithosphäre ; Fraktographie ; Spannungstensor ; Elektromagnetisches Verfahren
    Language: German
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  • 48
    Publication Date: 2021-03-29
    Description: Movement on fault planes causes a large amount of smaller-scale deformation, ductile or brittle, in the area surrounding the fault. Much of this deformation is below the resolution of reflection seismics (i.e. sub-seismic, 〈10m displacement), but it is important to determine this deformation, since it can make up a large portion of the total bulk strain, for instance in a developing sedimentary basin. Calculation of the amount of sub-seismic strain around a fault by 3-D geometrical kinematic retro-deformation can also be used to predict the orientation and magnitude of these smaller-scale structures. However, firstly a 3-D model of the fault and its faulted horizons must be constructed at a high enough resolution to be able to preserve fault and horizon morphology with a grid spacing of less than 10 m. Secondly, the kinematics of the fault need to be determined, and thirdly a suitable deformation algorithm chosen to fit the deformation style. Then by restoring the faulted horizons to their pre-deformation state (a ‘regional’), the moved horizons can be interrogated as to the strain they underwent. Since strain is commutative, the deformation demonstrated during this retro-deformation is equivalent to that during the natural, forward deformation...
    Description: conference
    Keywords: 551 ; TQC 220 ; TSB 000 ; VAE 200 ; VAE 400 ; VBE 000 ; Reflexionsseismik {Geophysik} ; Mitteleuropa {Geophysik} ; Geodynamik der Lithosphäre {Geologie} ; Tektogenese {Geologie} ; Modellierung von Prozessen in der Geosphäre ; Niedersächsiches Becken ; Dreidimensionale Seismik ; Störung 〈Geologie〉 ; Kinematik ; Modell
    Language: German
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  • 49
    Publication Date: 2021-03-29
    Description: Die Beziehungen zwischen der Mikrostruktur und der kristallografischen Vorzugsorientierung (Textur) von Hämatiterzen der gebänderten Eisenerzformation (BIF) in Brasilien wurden in vielen Veröffentlichungen behandelt, z.B. Quade et. al. 2000, Rosière et al. 2001, Bascou et al. 2002. Polfiguren dieser Hämatiterze zeigen kreisförmige bis elliptische c-Achsen-Maxima, die um den Pol der Foliation liegen. Die Pole der Prismenflächen liegen auf Großkreisen in der Foliationsebene und die Maxima auf diesen fallen mit der Lineation zusammen. Die Entstehung dieser Regelung wird auf Scherverformungprozesse zurückgeführt. Bei experimentellen Stauchversuchen an polykristallinem Hämatit gab es Anzeichen der Bildung eines c-Achsenmaximums senkrecht zur Kompressionsrichtung (Siemes et al. 2003). Da zu vermuten war, dass Gleiten parallel zur Basis des Hämatits Ursache der Regelung ist, wurden die Gleitmechanismen an experimentell verformten Hämatiteinkristallen bestimmt (Siemes et al. 2006). In diesem Beitrag werden neue Scherexperimente an polykristallinen Hämatitaggregaten vorgestellt...
    Description: conference
    Keywords: 551 ; VAE 120 ; VAE 140 ; VBB 000 ; VKB 270 ; VKB 120 ; Methodik {Strukturgeologie} ; Gesteinsdeformation {Strukturgeologie} ; Experimentelle Geologie ; Produkte mechanischer Deformation {Petrologie} ; Petrologie der Vulkanite ; Eisenerz ; Hämatit ; Torsionsversuch ; Scherung 〈Geologie〉 ; Experiment ; Texturanalyse ; Mikrostruktur
    Language: German
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  • 50
    Publication Date: 2021-03-29
    Description: The anisotropy of magnetic susceptibility (AMS) is a time-efficient method to describe crystallographic preferred orientations of rocks and has been applied in a wide field of sedimentary, metamorphic and magmatic geology. The method, however, suffers from limitations which mainly result from the interference of diamagnetic, paramagnetic and ferromagnetic fabrics (de Wall 2005) — the term ferromagnetism is used in a wider sense here, including e.g. ferrimagnetism. The AMS is an integral parameter which describes a crystallographic preferred orientation as an ellipsoid. The quantitative correlation of the AMS with the crystallographic preferred orientations should help to allow a closer view at the applicability and the limitations of the AMS analysis (see also Schmidt et al. 2006 a, b)... The results of this study are based on a large variety of fabric types of carbonate-mica marbles and mylonites, i.e. varying mica content, grain sizes, grain shapes, types and intensities of the crystallographic preferred orientation. The presented first correlations of the AMS and CPO for the single mineral phases in general demonstrate a good matching. Regarding the comparison of texture types and the AMS, limitations are possible. While single c-axis maxima and girdle-like c-axis distributions can be also distinguished by the AMS, it is obvious that distinguishing between these types and the double c-axis type is not possible at the present stage.
    Description: conference
    Keywords: 551 ; TOT 310 ; VKA 200 ; VAE 140 ; VEF 200 ; VER 200 ; VKB 270 ; VAE 120 ; Gesteinsmagnetismus {Geophysik} ; Gefügekunde der Gesteine ; Gesteinsdeformation {Strukturgeologie} ; Italien {Geologie} ; Namibia {Geologie} ; Produkte mechanischer Deformation {Petrologie} ; Methodik {Strukturgeologie} ; Apuaner Alpen ; Damara Orogen ; Karbonatgestein ; Deformation 〈Geologie〉 ; Magnetische Suszeptibilität ; Kristallorientierung ; Korrelationsanalyse
    Language: German
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  • 51
    Publication Date: 2021-03-29
    Description: The present study focuses on the northwestern OML, southwest of the mining town of Tsumeb. The dominating structure in this area is the NW-SE striking Guinas Fault. The Guinas Fault is a shear zone that divides an area, which is different in sense of stratigraphic features, the grade of pre-, syn- and post- Damaran deformation and the type and grade of mineralisation. The northern area is enriched by Cu-rich base metal sulphides, whereas the southern area is almost barren.
    Description: conference
    Keywords: 551 ; VER 200 ; VAE 400 ; VAE 814 ; VQD 200 ; VKB 294 ; Namibia {Geologie} ; Tektogenese {Geologie} ; Präkambrische Orogene {Geologie} ; Metamorphe Lagerstätten ; Metamorphe Komplexe, Afrika {Petrologie} ; Damara Orogen ; Otavi-Bergland ; Carbonatplattform ; Tektogenese ; Hydrothermale Phase
    Language: German
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  • 52
    Publication Date: 2021-03-29
    Description: The primary objective of this paper is to present a fault seal case study from the Njord Field, offshore Norway. The study utilised analogue field studies as well as core descriptions and petrophysical well data in order to evaluate the sealing potential of large to medium scale faults that segment the reservoir. Dynamic data and 4D seismic information was used to calibrate the results through multiple fault seal scenarios.
    Description: conference
    Keywords: 551 ; VRE 100 ; VRE 700 ; VSD 000 ; VAE 120 ; VAE 150 ; VAE 840 ; Exploration / Prospektion von Kohlenwasserstofflagerstätten ; Tektonik ; Nordeuropa {Fossile Energieträger} ; Methodik {Strukturgeologie} ; Strukturelle Erscheinungen {Strukturgeologie} ; Rifts {Geologie} ; Norwegen ; Erdöllagerstätte ; Störung 〈Geologie〉 ; Abdichtung ; Stochastisches Modell
    Language: German
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  • 53
    Publication Date: 2021-03-29
    Description: Das Untersuchungsgebiet liegt im Übergangsbereich zwischen den Svekofenniden und der Transskandinavischen Magmatischen Zone, welcher als Teil einer Paläoproterozoischen E- bis NE-abtauchenden Subduktionszone interpretiert wird (z.B. Beunk & Page 2001). Im heutigen tiefkrustalen Erosionsniveau sind im Wesentlichen mehrere Generationen von Granitioden aufgeschlossen, die etwa im Zeitraum 1850–1650Ma (z.B. Åhäll & Larson 2000) in die zuvor gefalteten Metasedimente und Metavulkanite der paläo-Proterozoischen Västervik- Formation intrudierten. Dabei kam es, in Abhängigkeit von der primären Lithologie der Schichtenfolge, zu unterschiedlichen Formen kontaktmetamorpher und migmatischer Überprägungen bis hin zur Bildung anatektischer Granite. Innerhalb dieser migmatisch/ anatektischen Bereiche stellen Metabasite und Metaquarzite schmelzresistente Horizonte der ursprünglichen Abfolge dar. Nordwestlich von Västervik zeigen entsprechende Metaquarzite lokal komplexe, z.T. nicht-zylindrische Falten im m- bis 10er m-Maßstab, die sich deutlich von der einfacheren, großmaßdimesionierten Faltung in dieser Region abheben. Aufgrund von ersten Ergebnissen einer Vorstudie und einer Diplomkartierung wird angenommen, dass diese Strukturen durch Intrusionen von Mini-Lakkolithen in tiefere Niveaus der Västervik-Formation erzeugt wurden...
    Description: conference
    Keywords: 551 ; VAE 150 ; VAE 400 ; VAE 140 ; VKB 292 ; VKB 250 ; VKB 220 ; Strukturelle Erscheinungen {Strukturgeologie} ; Tektogenese {Geologie} ; Gesteinsdeformation {Strukturgeologie} ; Metamorphe Komplexe, übriges Europa {Petrologie} ; Metasedimente {Petrologie} ; Kontaktmetamorphe und metasomatische Gesteine {Petrologie} ; Svekofenniden ; Västervik 〈Region〉 ; Proterozoikum ; Aureole 〈Geologie〉 ; Metasediment ; Quarzit ; Faltung 〈Geologie〉 ; Deformation 〈Geologie〉
    Language: German
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  • 54
    Publication Date: 2021-03-29
    Description: The Lower Cretaceous units of the Eastern Cordillera of Colombia have been deposited during a stage when the area where nowadays lies a contractional orogen was an actively deforming rift. Therefore, they are syn-rift sedimentary units. These rocks have a unique feature in the Cretaceous sedimentary column of this mountain chain. This is a widespread planar fabric expressed mostly as a penetrative slaty cleavage. This planar fabric is only macroscopically evident in Cretaceous units older than Barremian. Planar fabric (e.g. slaty cleavage) is one of the products of internal or penetrative deformation (i.e. contractional deformation at microscopical scale in rock units). Pressure solution and even cleavage have been recently reported in areas undergoing only subtle burials (Engelder & Marschak 1985). However, in the Eastern Cordillera, the units where planar fabric is evident are the base of a sequence of at least 5km and they have vitrinite reflectance values up to 2. These data and the formation of clorithoid contemporary with the slaty cleavage, allow us to propose that this planar fabric was developed when the Lower Cretaceous units had an amount of overburden close to the thickness of the entire Cretaceous sequence...
    Description: conference
    Keywords: 551 ; VAE 400 ; VAE 130 ; VEX 700 ; VEX 100 ; VQC 000 ; Tektogenese {Geologie} ; Geomechanik ; Kolumbien {Geologie} ; Anden {Geologie} ; Lagerstättengenese ; Kolumbien ; Anden ; Orogenese ; Deformation 〈Geologie〉 ; Hydrothermale Lösung ; Mineralisation ; Hydrothermale Lagerstätte
    Language: German
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  • 55
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    Universitätsverlag Göttingen
    Publication Date: 2021-03-29
    Description: The orogenic wedge model (Davis et al. 1983; Platt 1986) marks a conceptual breakthrough in understanding the growth and long-term evolution of accretionary wedges. The characteristic rheology of subduction-related accretionary wedges is thought to change from Coulomb to viscous when the wedge becomes thicker than ca. 15 km, a transition that may influence the stability and dynamics of these wedges. Platt (1986) proposed that viscous flow may trigger extensional faulting in the upper rear part of the wedge and Wallis et al. (1993) argued that viscous flow may cause vertical ductile thinning of the rear part of the wedge. Material fluxes control the geometric shape of an accretionary wedge (Brandon et al. 1998; Platt 1986). Frontal accretion and erosion both tend to drive the wedge into a subcritical condition as the taper angle of the wedge is progressively reduced. This leads to horizontal shortening across the wedge. If underplating is dominantly controlling the flow field in the wedge and frontal accretion or erosion at the rear of the wedge are small, the wedge is supercritically tapered and leading horizontal extension. Horizontal extension leads to a subhorizontal foliation and may eventually lead to normal faulting in the rear-part of the wedge. Despite the importance of these issues, there remains a paucity of detailed information about ductile deformation and how viscous flow influences the stability of subduction-related accretionary wedges. Strain measurements are an instrument to address whether viscous flow strongly influences the deformation in accretionary wedges. They provide direct information about the kinematics of ancient orogenic belts. Additionally, they allow understanding important tectonic processes in subduction wedges such as the pattern of flow within the wedge. We focus on deformation analysis on a suite of samples from the Otago wedge exposed in the South Island of New Zealand. The Otago accretionary wedge offers a unique opportunity to study the tectonic evolution of a typical subduction-related accretionary complex. Its across-strike length of ca. 600 km makes it one of the largest exposed ancient accretionary wedges on Earth. Pressure and temperature estimates indicate that our samples are representative of deformation conditions to depths as great as ca. 35 km. This is similar to maximum depths observed for subducting slabs beneath modern forearc highs. The deformation measurements show that the strain magnitude is generally small in the Otago wedge. The oct values, a measure of the distortion a sample experienced (independent from the strain geometry), range from 0.34– 3.87 for the Rf /? strains, 1.01–4.28 for XTG strains across the whole suite of the Otago rock pile, and 0.08–0.70 for the absolute strains obtained from low metamorphic grade rocks. The Otago samples are characterized by considerable volume strain that increases from the lower textural zones towards the high-grade interior of the wedge. Our strain results are inconsistent with the models which advocate supercritically tapering of accretionary wedges and that supercritical tapering eventually triggers normal faulting. Taking averages of our strain measurements, a residence time in the wedge of 35 Myr, burial depths of 30 km, coaxial deformation and a depth-dependent rate for ductile deformation, we calculate vertically-averaged strain rates. Because the principal strain axes of the tensor average are all inclined, the vertical averaging changes the principal stretches. The horizontal principal stretch parallel to the 160°-striking Otago wedge becomes 0.79, that for across strike 0.88 and for vertical strain 0.44. Averaged strain rates are −1.44−16 s−1 for parallel-strike horizontal strain, −6.2−17 s−1 for across-strike horizontal strain, and −8.02−16 s−1 for vertical strain. The strain rates are related to volume loss and to the efficiency with which dissolved chemicals are advected away. The rates are similar to the ones calculated by Bolhar & Ring (2001) and Ring & Richter (2004) for the Franciscan wedge. These strain rates are orders of magnitude smaller than the 1−14 s−1 strain rates assumed by Platt (1986). Thus, our data imply that the Otago wedge could not shorten horizontally fast, and hence could not have steepened up its surface slope. The fact that shortening was accompanied by volume loss has another important and interesting consequence. Even if a case was envisioned in which horizontal shortening was fast enough to steepen up the surface slope of the wedge, the volume loss would not necessarily change the wedge geometry into a supercritical configuration triggering normal faulting. As a consequence of the slow strain rates and the high volume loss, viscous flow probably was not fast enough to significantly influence the stability of the wedge and to form a supercritically tapered wedge.
    Description: conference
    Keywords: 551 ; VAE 400 ; VET 500 ; VAE 130 ; VAE 140 ; Tektogenese {Geologie} ; Neuseeland {Geologie} ; Geomechanik ; Gesteinsdeformation {Strukturgeologie} ; Orogenese ; Akkretionskeil ; Deformation 〈Geologie〉 ; Viskosität ; Südinsel 〈Neuseeland〉
    Language: German
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  • 56
    Publication Date: 2021-03-29
    Description: This study addresses the polyphase Miocene tectonic evolution in the Maramures area (northern Romania) by combining field observations, stratigraphic arguments and fission-track analysis (Tischler et al. in press). Fission-track analysis has been carried out on basement samples from the Rodna horst, situated in the East Carpathians (Bucovinvian nappes). This area was affected by Cretaceous medium- to low-grade metamorphism, followed by post-collisional exhumation and renewed moderate thermal overprint due to the deposition of Eocene to Early Miocene sediments. Based on paleostress analyses of mesoscale structures, three main tectonic phases can be disdinguished in the study area, all of which are postdate the earliest Miocene (Aquitanian, 20.5 Ma). In late Early Miocene (Burdigalian) the Pienide nappes, nonmetamorphic flysch series, were emplaced onto the Paleogene to Early Miocene sedimentary cover of the Bucovinian nappes...
    Description: conference
    Keywords: 551 ; VEE 640 ; VAE 400 ; VBN 500 ; VDI 121 ; VBN 400 ; VEE 100 ; Rumänien {Geologie} ; Tektogenese {Geologie} ; Geochronologie einzelner Regionen im allgemeinen ; Miozän ; Sonstige Verfahren der geologischen Altersbestimmung ; Karpatensystem {Geologie} ; Marmarosch ; Miozän ; Tektogenese ; Kernspaltspurenmethode
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 57
    Publication Date: 2021-03-29
    Description: Der Tien Schan ist ein etwa E–W erstrecktes, rund 2500km langes und bis 250km breites Gebirge in Zentralasien. Einzelne Gipfel sind über 7000m hoch. Obwohl durch die Kollision Indiens mit Asien entstanden, ist der Tien Schan ein Intraplatten-Orogen, dessen Hebung lange nach dem Beginn der Kollision vor 50Ma und weit nördlich der Sutur einsetzte (Sobel & Dumitru 1997). Von Tibet ist der Tien Schan durch das kaum deformierte Tarim-Becken getrennt. Hohe und schroffe Topographie, starke Seismizität (Molnar & Ghose 2000) und GPS-Daten zeigen, dass das Orogen auch heute sehr aktiv ist (Abdrakhmatov et al. 1996, Reigber et al. 2001). Der Tien Schan nimmt gegenwärtig etwa 40% der Gesamtkonvergenz Indiens mit Asien auf. Die Struktur des Tien Schan wird dominiert von E–Wstreichenden, nach N und S gerichteten Überschiebungen (Avouac et al. 1993, Yin et al. 1998), die sich meist deutlich in der Morphologie äußern. Auffallend ist die großräumige Gliederung des Orogens durch NW–SE-streichende dextrale Blattverschiebungen, die auch in das nördliche Vorland reichen (Tapponnier & Molnar 1979). Den Unterbau des Tien Schan bildet ein paläozoisches Akkretionsorogen (Zonenshajn et al. 1990). Im Mesozoikum entstand eine ausgedehnte Fastebene. In der späten Kreide oder dem frühen Tertiär setzte die Ablagerung kontinentaler Serien ein, die im jüngeren Känozoikum sehr mächtig werden. Die synorogenen Sedimente liegen manchmal konkordant, oft aber auch deutlich winkeldiskordant auf dem paläozoischen Sockel. In beiden Fällen bilden sie häufig asymmetrische Falten, die oft mit Störungen verknüpft sind. Geländestufen und ein starker Einfluss auf die Entwicklung des Entwässerungsnetzes weisen viele Störungen als gegenwärtig aktiv aus. Unser Untersuchungsgebiet liegt im Südosten Kasachstans. Es umfasst die Nordflanke des Tien Schan und seinen zentralen Teil mit den höchsten Erhebungen. Im Untersuchungsgebiet liegt das nach E propagierende Ende eines seismisch aktiven Störungssystems, das weiter westlich die nördliche Randstörung des Gebirges bildet, wo es unter der Millionenstadt Almaty (Alma- Ata) verläuft und eine ernste Bedrohung darstellt. Die Entwicklung dieses Störungssystems soll über verschiedene Zeitskalen mit verschiedenen Methoden untersucht werden...
    Description: conference
    Keywords: 551 ; VAE 811 ; VBN 500 ; VEG 340 ; VEG 160 ; VEK 000 ; VBJ 000 ; VAE 120 ; Alpidische Orogene {Geologie} ; Geochronologie einzelner Regionen im allgemeinen ; Kasachstan {Geologie} ; Zentral-kasachischer Schild und benachbarte Gebirgszüge {Geologie} ; Zentralasien {Geologie} ; Satellitenbildgeologie ; Methodik {Strukturgeologie} ; Tien Schan ; Neogen ; Tektogenese ; Hebung 〈Geologie〉 ; Apatit ; Kernspaltspurenmethode ; Satellitenbildauswertung
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 58
    Publication Date: 2021-03-29
    Description: The anisotropy of magnetic susceptibility (AMS) of rocks reflects the preferred orientations of minerals. Therefore AMS is a quick and easy way to characterize rock fabrics (Hrouda 1982,Borradaile 1988); the obtained result is also called the magnetic fabric of the rock. The method has been often used to measure the orientation of ferromagnetic minerals, mainly magnetite, but in recent studies it has been increasingly used to measure textures of paramagnetic minerals as phyllosilicates (Lüneburg et al. 1999, Cifelli et al. 2004). A further application is the measurement of diamagnetic textures, especially calcite textures. Calcite is suitable for the AMS method, because it has a high magnetic anisotropy with the minimum susceptibility along the crystallographic c-axis. Therefore a preferred orientation of the c-axes, which can be induced by deformation, generates a magnetic fabric...
    Description: conference
    Keywords: 551 ; VKA 200 ; VAE 120 ; TQB 000 ; TOT 310 ; VGA 410 ; Gefügekunde der Gesteine ; Methodik {Strukturgeologie} ; Erdmagnetische Verfahren {Geophysik} ; Gesteinsmagnetismus {Geophysik} ; Röntgenanalyse {Mineralogie: Kristallographie} ; Calzit ; Magnetische Suszeptibilität ; Kristallorientierung ; Röntgendiffraktometrie ; Neutronendiffraktometrie ; Vergleichsmessung
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 59
    Publication Date: 2021-03-29
    Description: Mineral veins form when water solutions passing through fluid-transporting fractures gradually seal the fractures as minerals precipitate. Many mineral veins are hydrofractures, that is, fractures generated at least partly by an internal fluid pressure. For most mineral veins, the fluid generating the hydrofracture is geothermal water. Other hydrofractures include fractures generated by magma (dykes, sills, inclined sheets), oil, gas and groundwater (many joints), as well as manmade hydraulic fractures in petroleum engineering. Hydrofractures are primarily extension fractures (Gudmundsson et al. 2002). The formation of hydrofractures is one of the two basic mechanisms for the generation and maintenance of permeability, particularly in fluid-filled heterogeneous reservoirs such as those commonly associated with petroleum, groundwater, volcanic and geothermal fields. The other, and better-known, mechanism for permeability development is the formation of shear fractures, that is, faults. The permeability development in fractured reservoirs, such as those for groundwater, geothermal water and petroleum, depends on fluid overpressure and transport in hydrofractures (Aguilera 1995). It has been proposed that a high fluid pressure in a reservoir can create high temporary permeability through hydrofracturing (Aguilera 1995; Gudmundsson et al. 2002). This hydrofracturing may result in mineral vein networks. Such palaeohydrofractures give information about past fluid flow and flow networks. Studying mineral veins is thus important for understanding fluid and mineral transport in rocks and reservoirs...
    Description: conference
    Keywords: 551 ; VEC 218 ; VAE 150 ; VAE 400 ; VKB 380 ; South-West England {Geologie} ; Strukturelle Erscheinungen {Strukturgeologie} ; Tektogenese {Geologie} ; Sedimente bestimmter Regionen ; Somerset ; Trias ; Tonstein ; Silt ; Hydraulische Rissbildung ; Mineralgang ; Gips
    Language: German
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  • 60
    Publication Date: 2021-03-29
    Description: The general aim of the project is the examination of microstructures that develop under HP conditions in computer experiments. Starting point is an interest in the dynamics of HP phase transitions, as for instance the probably catastrophic phase-change event of olivine to spinel in the upper mantle. This is either explained by large overpressure or failure during the development of micro-structures during the growth of the spinel phase. Experimental results on this subject are rare, and do not lead by themselves to a deeper insight into the complicated stress/strain/volumechange/ micro-crack relationships of the transition. We developed a central force spring model, where particles can undergo a phase change using parameters of olivine and spinel. The algorithm is capable of simulating the local growth of the mentioned phases on the basis of direction-dependant rate laws. In the current context newtonian viscosity is added to the previously solely elastic system, since under HP/HT conditions the viscous flow within the material will have a large influence on the distribution of elastic energies, which in turn have an important influence on the driving force of the transition. Thus we are dealing with a visco-elastic system, which will be subjected to timedependant strain.
    Description: conference
    Keywords: 551 ; VKA 200 ; VBE 000 ; VKA 110 ; VAE 120 ; Gefügekunde der Gesteine ; Modellierung von Prozessen in der Geosphäre ; Gesteinsbestimmung ; Methodik {Strukturgeologie} ; Hochdruckparagenese ; Viskosität ; Olivin ; Spinell ; Kristallisation ; Computersimulation
    Language: German
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  • 61
    Publication Date: 2021-03-29
    Description: Bei der tiefen Geothermie werden zur Schaffung eines künstlichen geothermischen Reservoirs unterirdische Wärmetauscher erzeugt. Zur Wärme- und Stromerzeugung wird dann wiederholt Wasser in den Untergrund verpresst, welches erhitzt und wieder gefördert wird. Dafür werden im Allgemeinen Systeme aus Injektions- und Förderbohrungen (‚Dubletten‘) von 2–5km Tiefe verwendet, um die erforderlichen Temperaturen zu erreichen. Der kritische Parameter für die wirtschaftliche Nutzbarkeit geothermischer Reservoire (‚Erfolg‘) ist jedoch eine nötige hohe Permeabilität. In den meisten Reservoiren müssen zu niedrige natürliche Permeabilitäten — oder zu kleine Wärmeaustauschflächen — durch die Öffnung bzw. Scherung vorhandener Brüche oder die Erzeugung künstlicher hydraulischer Brüche erhöht werden (‚Reservoirstimulation‘). Um Stimulationen erfolgreich durchzuführen, müssen dabei das vorhandene Bruchsystem und das gegenwärtige Spannungsfeld möglichst genau bekannt sein. Dafür sind strukturgeologische Studien von besonderer Bedeutung (vgl. Philipp et al. 2005)...
    Description: conference
    Keywords: 551 ; TOO 000 ; TQF 000 ; VAE 120 ; Geothermik {Geophysik} ; Geothermische Verfahren {Geophysik} ; Methodik {Strukturgeologie} ; Geothermische Energie ; Strukturgeologie ; Buntsandstein ; Klüftung
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 62
    Publication Date: 2021-03-29
    Description: For many years it has been known that near surface isotherms are influenced by the topography (Lees 1910). Recently, a number of studies were pursued to quantify the effect of topography on low temperature isotherms (e.g. Stüwe et al. 1994, Mancktelow & Grasemann 1997). The magnitude of perturbation depends on several parameters: exhumation rate, geothermal gradient, wavelength and amplitude of topography, and finally by the age of surface relief change (Braun 2002).
    Description: conference
    Keywords: 551 ; TOO 000 ; VBN 400 ; VBN 200 ; VEB 168 ; VAE 400 ; Geothermik {Geophysik} ; Sonstige Verfahren der geologischen Altersbestimmung ; Radiometrische Altersbestimmung ; Schweizer Alpen {Geologie} ; Tektogenese {Geologie} ; Gotthardtunnel ; Gotthardgruppe ; Isotherme ; Modellierung ; Kernspaltspurenmethode
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 63
    Publication Date: 2021-03-29
    Description: Technische Entwicklungen und verbesserte Messmethoden haben in den vergangenen 15 Jahren in der Gesteinstexturanalyse zu einer zunehmenden Nutzung vor allem der Elektronen- und Neutronenbeugung geführt. Dabei ist die Anwendung der Röntgentexturanalyse in der Geologie in den Hintergrund getreten. Neue technische Optionen dieser Methode, wie sie zum Beispiel für die Qualitätskontrolle in der Siliziumchipherstellung entwickelt worden sind, haben noch keinen Eingang in die Gesteinstexturanalyse gefunden. Steht die volumenbezogene Gesamttexturanalyse im Vordergrund, so hat die Röntgenbeugung spezifische Vorteile. Gegenüber der Elektronenbeugung am Rasterelektronenmikroskop (Backscatter Electron Diffraction) ist keine aufwendige Probenpräparation notwendig und es kann ein wesentlich größeres Probenvolumen erfasst werden. Gegenüber der Neutronenbeugung ist die Röntgenbeugung wesentlich kostengünstiger und die zur Verfügung stehende Messzeit ist im Prinzip unbeschränkt. Nachteile der Röntgentexturanalyse sind die notwendige Messdatenkorrektur aufgrund der Defokussierung des Messstrahls im Verlauf der Messung (Ullemeyer & Weber 1994), die unter Umständen schlechte Auflösung bezüglich Gitterabstand d, und das gegenüber der Neutronenbeugung wesentlich geringere messbare Probenvolumen. Die Anwendung der Röntgentexturanalyse war daher klassischerweise auf monophase und feinkörnige Gesteine beschränkt. Um diese Nachteile der Röntgentexturanalyse kostengünstig zu minimieren, wurde für die Abteilung Strukturgeologie und Geodynamik des Geowissenschaftlichen Zentrums der Universität Göttingen ein neues Röntgentexturgoniometer auf der Basis von neu entwickelten standardisierten Bauteilen für die Gesteinstexturanalyse individuell konfiguriert und die Messdatenauswertestrategie angepasst.
    Description: conference
    Keywords: 551 ; VAE 120 ; VKA 200 ; VGB 500 ; Methodik {Strukturgeologie} ; Gefügekunde der Gesteine ; Röntgenographische Methoden {Mineralogie} ; Gefüge 〈Gesteinskunde〉 ; Röntgentexturanalyse
    Language: German
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  • 64
    Publication Date: 2021-03-29
    Description: The working area is located in the Stillupp Valley (Tirol, Austria), where the western termination of the SEMPfault (Salzach, Ennstal, Mariazell, Puchberg), overprints the northernmost margin of the Zentralgneiss. This sinistral shearzone, which has a length of about 300 km, and causes a lateral displacement of 60km (Linzer et al. 2002), marks part of the northern border of the Tauern Window...
    Description: conference
    Keywords: 551 ; VAE 850 ; VAE 400 ; VAE 140 ; VEB 161 ; Festländische Lineamente {Geologie} ; Tektogenese {Geologie} ; Gesteinsdeformation {Strukturgeologie} ; Ostalpen {Geologie} ; Tauernfenster 〈West〉 ; Scherzone ; Horizontalverschiebung ; Transpression
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 65
    Publication Date: 2021-03-29
    Description: Since the work of Griggs & Blacic (1965) it is well known that the crystal plastic flow strength of ‘wet’ quartz samples is much lower than that of ‘dry’ samples deformed at the same conditions, and the general effect of water on dislocation creep microstructures has been documented (e.g. Hirth & Tullis 1992), but its effect on the recrystallized grain size has not been quantified. The recrystallized grain size is the most reliable and most easily measurable microstructural feature to derive flow stresses from natural mylonites (e.g. White 1979, Kohlstedt et al. 1980). In a recent experimental study, a well-constrained recrystallized grain size piezometer for quartz (Stipp & Tullis 2003) was calibrated using natural as-is quartzites; the use of a molten salt cell at high confining pressure (1.5GPa) in a Griggs-type apparatus allowed good stress resolution (Green & Borch 1989). There has been some debate as to whether there is any independent effect of water on the recrystallized grain size piezometer. Two laboratory studies on olivine aggregates (at different pressures) report contradictory results; van der Wal et al. (1993) found that the recrystallized grain size piezometer is independent of the water content, whereas Jung & Karato (2001) observed a water-dependence of the piezometer. In this study, we have investigated changes in the recrystallized grain size and other deformation microstructures of quartz within dislocation creep regimes 2 and 3 of Hirth & Tullis (1992). Deformation experiments on Black Hills quartzite with three different initial water contents (as-is, wateradded and vacuum-dried) were carried out in order to evaluate the effect of water on the recrystallized grain size / flow stress piezometer...
    Description: conference
    Keywords: 551 ; VKA 200 ; VAE 120 ; VAE 140 ; VHB 400 ; VKA 120 ; VKB 270 ; Gefügekunde der Gesteine ; Methodik {Strukturgeologie} ; Gesteinsdeformation {Strukturgeologie} ; Oxide und Hydroxide {Mineralogie} ; Experimentelle Petrologie ; Produkte mechanischer Deformation {Petrologie} ; Quarzit ; Deformation 〈Geologie〉 ; Experiment ; Quarz ; Rekritallisationstextur
    Language: German
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  • 66
    Publication Date: 2021-03-29
    Description: Quartz microstructures produced in short-term deformation and annealing experiments are compared with those in naturally deformed vein quartz in cores from the Long Valley Exploratory Well (Long Valley Caldera, California). The experiments are designed to simulate i) co-seismic deformation of quartz in the uppermost plastosphere and ii) annealing during post-seismic stress relaxation. The experiments are performed in a modified Griggs type solid medium apparatus. Natural polycrystalline quartz samples (grain size on the order of millimetres) are deformed at a temperature of 400°C, a confining pressure of 2GPa, and strain rates of ca. 10−4 s−1. The differential stress reaches 2–4GPa and the irreversible axial shortening is typically a few percent. In some experiments the samples have subsequently been annealed for ca. 14–15 h at elevated temperatures of 800–1000°C and low stresses (quasi-hydrostatic or nonhydrostatic conditions)...
    Description: conference
    Keywords: 551 ; VKA 200 ; VAE 120 ; VAE 140 ; VHB 400 ; VKA 120 ; VGF 300 ; Gefügekunde der Gesteine ; Methodik {Strukturgeologie} ; Gesteinsdeformation {Strukturgeologie} ; Oxide und Hydroxide {Mineralogie} ; Experimentelle Petrologie ; Experimentelle Mineralogie ; Quarz ; Deformation 〈Geologie〉 ; Experiment ; Mikrostruktur ; Rekristallisationstextur
    Language: German
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  • 67
    Publication Date: 2021-03-29
    Description: This study focuses on clay smear processes during fault gouge evolution in sand-clay sequences at depths up to 2 km. A clay-rich fault gouge can dramatically lower the fault’s permeability, and prediction of this process is therefore relevant in groundwater modelling and hydrocarbon geology (Fulljames et al. 1997, Yielding et al 1997, van der Zee et al. 2003, 2005). We constructed an ‘underwater’ sandbox to deform layered sand-clay models of 20 × 40 × 20 cm above a 70°-dipping rigid basement fault. The experiments are run completely watersaturated to allow deformation of wet clay and cohesionless sand. The basement fault moves at 20 to 120mmh−1 to a maximum offset of 60 mm. We use quartz sand with grain size between 0.1 to 0.4mm and an illite-rich clay with a water content between 28 and 55 wt.%. Water content of the clay is used to control its shear strength and state of consolidation...
    Description: conference
    Keywords: 551 ; VAE 140 ; VAE 120 ; VAE 130 ; VBB 000 ; VKA 120 ; VKB 270 ; Gesteinsdeformation {Strukturgeologie} ; Methodik {Strukturgeologie} ; Geomechanik ; Experimentelle Geologie ; Experimentelle Petrologie ; Produkte mechanischer Deformation {Petrologie} ; Verwerfung ; Störungsletten ; Experiment
    Language: German
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  • 68
    Publication Date: 2021-03-29
    Description: Diese Arbeit beschäftigt sich mit dem strukturellen Bau und der tektonischen Entwicklung der Lechtal-Decke im nordwestlichen Rätikon am Westende der Nördlichen Kalkalpen (NKA). Die Daten und Interpretationen beziehen sich zum Einen auf den gesamten Bereich der NKA im Rätikon westlich des Brandnertals und zum Anderen auf ein detailliert kartiertes Teilgebiet zwischen dem südlichen Brandnertal und dem südlichen Gamperdonatal. In- und außerhalb dieses Kartiergebiets konnten in Aufschlüssen der Arosazone, die das lokale Unterlager der Nördlichen Kalkalpen darstellt, kinematische Daten von Scherbändern erhoben werden. Auf der Basis der eigenen Arbeiten und publizierten Geologischen Karten der Region (Allemann 1985, Heissl 1965) wurde ein NW–SE-Profil durch das westliche Rätikon konstruiert und bilanziert. Die Anlage des Profils erfolgte senkrecht zum Überwiegenden Streichen der Großstrukturen die einen ausgeprägten Schuppen- und Faltenbau zeigen...
    Description: conference
    Keywords: 551 ; VEB 162 ; VAE 811 ; VAE 140 ; VAE 400 ; Nördliche Ostalpen {Geologie} ; Alpidische Orogene {Geologie} ; Gesteinsdeformation {Strukturgeologie} ; Tektogenese {Geologie} ; Lechtal Decke ; Deformation 〈Geologie〉 ; Tektogenese
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 69
    Publication Date: 2021-03-29
    Description: The North equatorial Panafrican Belt, whose Cameroonian formations are dated between 650 and 400 million years, and which are located in the North of the Congo Craton, is subdivided in to three major geodynamic domains: a north Cameroon domain, a central Cameroon domain and a south Cameroon domain. These major domains are generally, particularly the central domain, affected by great strikeslip faults in which the most important are the central cameroonian shear zone and the Sanaga fault. Studies that establish the order of occurrence of geological events, generally performed in these domains and particularly at Banefo area (West Cameroon) reveal markers of recent tectonics (post panafrican) that affect the granitogneissic basement...
    Description: conference
    Keywords: 551 ; VEP 400 ; VAE 150 ; VAE 400 ; VKB 270 ; Kongo Brazzaville {Geologie} ; Strukturelle Erscheinungen {Strukturgeologie} ; Tektogenese {Geologie} ; Produkte mechanischer Deformation {Petrologie} ; Kamerun ; Neotektonik ; Pseudotachylit ; Strukturgeologie
    Language: German
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  • 70
    Publication Date: 2021-03-29
    Description: Since approximately two decades fractal geometry offers tools for the quantification of rock fabrics, and new methods are currently under development to investigate the inhomogeneity of crystal distributions, grain- and phase-boundary patterns as well as their anisotropy behaviour (Kruhl et al. 2004). These methods are now adapted for automated processing and suitable to quantify the inhomogeneity and anisotropy of rock fabrics from macro to microscale. Applications for quantifying inhomogeneity are mainly based on the box-counting and map-counting (Peternell 2002) methods, for anisotropy behaviour mainly based on modified Cantor-dust methods and provide fractal dimensions, fractal-dimension isolines and azimuthal anisotropies of fractal dimension (AAD, Volland & Kruhl 2004). For instance, the results provide information about the local variations of fabric patterns and their prefer orientation behaviour at macro and microscale.
    Description: conference
    Keywords: 551 ; VAE 120 ; VKA 200 ; VAE 140 ; Methodik {Strukturgeologie} ; Gefügekunde der Gesteine ; Gesteinsdeformation {Strukturgeologie} ; Magmatisches Gestein ; Gefüge 〈Gesteinskunde〉 ; Fraktalgeometrie ; Anisotropie
    Language: German
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  • 71
    Publication Date: 2021-03-29
    Description: It is generally agreed upon that the exhumation of metamorphic rocks in the Aegean is caused by post orogenic extension in the late Oligocene to early Miocene. This extension is in principle largely accommodated by low-angle crustal detachment faulting possibly resulting in the formation of metamorphic core complexes (MCC). Here, we present data from recent structural investigations on the island of Kea in the W. Cyclades, Greece. Our work focussed in the north of the island. Of the ca. 270m total structural thickness that was mapped, the entire section of rocks are highly strained. Exhumation during progressive deformation is recorded by the transition from ductile to brittle/ductile to brittle conditions. The regional characteristics and types of deformation structures vary depending on the protolith and the intensity of strain...
    Description: conference
    Keywords: 551 ; VAE 860 ; VAE 400 ; VAE 140 ; VEF 300 ; VKB 292 ; VKB 270 ; Festlandkerne {Geologie} ; Tektogenese {Geologie} ; Gesteinsdeformation {Strukturgeologie} ; Griechenland und griechische Inseln {Geologie} ; Metamorphe Komplexe, übriges Europa {Petrologie} ; Produkte mechanischer Deformation {Petrologie} ; Kea ; Scherzone ; Deformation 〈Geologie〉
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 72
    Publication Date: 2021-03-29
    Description: The area of the central and western Swiss Alps reveals not only the highest uplift rates of Switzerland (1.5mma−1 near Brig, Schlatter & Marti 2002), but also shows a strong concentration of earthquakes (e.g. Deichmann et al. 2004). This raised the question, whether the region hosts any linear topographic expressions that can be attributed to motion along potentially seismogenic faults. The area was therefore chosen for the investigation of postglacially active lineaments. Firstly, aerial photographs from the entire area were searched for linear features, which could be of gravitational or tectonic origin. Subsequently, selected lineaments were visited in the field to study their origin. We found scarce but positive evidence for neotectonic fault movements. One particular lineament that exhibited the most promising exposures was investigated in greater detail. This lineament is a prominent NW–SE striking fault located at the Gemmi Pass, runs perpendicularly to the regional fold axes and cuts through the Helvetic nappe stack. The position and orientation of the fault discounts gravitational reactivation. A close examination of the fault rocks reveals a long term evolution of this fault starting already at a late stage of Alpine nappe emplacement and related deformation.
    Description: conference
    Keywords: 551 ; VAE 150 ; VAE 400 ; VEB 168 ; Strukturelle Erscheinungen {Strukturgeologie} ; Tektogenese {Geologie} ; Schweizer Alpen {Geologie} ; Schweizer Alpen ; Gemmi ; Neotektonik ; Störung 〈Geologie〉
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 73
    Publication Date: 2021-03-29
    Description: Das Untersuchungsgebiet umfasst den Nordrand des Aarmassivs, die autochthone und paraautochthone sedimentäre Bedeckung des Aarmassivs, den ultrahelvetischen Wildflysch und den Südrand der Wildhorndecke. Das Aarmassiv besteht aus dem Innertkirchener Granit und Granitgneis und den sogenannten Mischgneisen. Lokal sind präalpine mylonitische Scherzonen ausgebildet. Die sedimentäre Bedeckung des Aarmassivs beginnt mit einem geringmächtigen permotriassischen Aufarbeitungshorizont des kristallinen Untergrundes aus Quarz-Glimmerschiefern, Arkosen und Konglomeraten. Darüber folgt die mehrere hundert Meter mächtige mesozoische Abfolge. Im Arbeitsgebiet tritt an der Basis der massige, hell bis rötlichgelb verwitternde Rötidolomit hervor. Im Hangenden liegen die kalkigen Schichten des Doggers sowie das Argovien. Darüber folgen die mächtigen Kalkserien des Malms (Quintner Kalk) und der unteren Kreide (Oehrlikalk), welche die Steilwände der Engelhörner aufbauen. In den parautochthonen Schuppen auf der Nordseite der Engelhörner beginnt die Abfolge erst mit dem unteren Malm. Als jüngste Einheit treten dort allerdings auch Tertiäre Schichten auf, welche überwiegend aus kalkhaltigen Sandsteinen, Brekzien und Tonschiefern bestehen. Als nur wenige Meter mächtiger dunkler bis schwarzer, glimmerführender Tonschiefer ist der allochthone ultrahelvetische Wildflysch zwischen den parautochthonen Schuppen und der Wildhorndecke eingeklemmt. Die Wildhorndecke wird im Arbeitsgebiet von den Einheiten des Doggers aufgebaut. Die Zuordnung des Doggers zur Wildhorndecke ist allerdings nicht immer eindeutig. Westlich des Arbeitsgebietes in der Umgebung von Grindelwald werden Einheiten des Doggers z.T. auch dem Ultarhelvetikum zugerechnet (Günzler-Seiffert & Wyss 1938).Die lithologische Kartierung, aber auch die Zuordnung der Lithologien zu den tektonischen Einheiten basiert im Wesentlichen auf den ausgezeichneten Vorarbeiten (z.B. Arbenz & Müller 1920; Günzler-Seiffert & Wyss 1938; Müller 1938; Büchi 1980). Ziel unserer Untersuchungen ist es, die Kinematik sowie die relative zeitliche Abfolge der einzelnen Groß- und Kleinstrukturen genauer zu bestimmen und die strukturelle Gliederung des Arbeitsgebietes mit den von Burkhard (1988) definierten Deformationsphasen zu korrelieren...
    Description: conference
    Keywords: 551 ; VAE 811 ; VAE 400 ; VAE 150 ; VAE 140 ; VEB 168 ; Alpidische Orogene {Geologie} ; Tektogenese {Geologie} ; Strukturelle Erscheinungen {Strukturgeologie} ; Gesteinsdeformation {Strukturgeologie} ; Schweizer Alpen {Geologie} ; Aarmassiv ; Ultrahelvetikum ; Scherzone ; Tektogenese ; Deformation 〈Geologie〉
    Language: German
    Type: anthologyArticle , publishedVersion
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