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  • 1
    Publication Date: 2021-03-29
    Description: In Schleswig-Holstein wurden in den zurückliegenden vier Jahrzehnten detaillierte Untersuchungen an Probenmaterial aus Aufschlüssen und Kernbohrungen durchgeführt. Analysen der Kiesfraktion und von ‚Leitgeschieben‘ aus glazialen Ablagerungen wurden für die Interpretation und Korrelation genutzt. Glazifluviatile Sedimente wurden TL- und OSL-datiert. Zusammen mit der stratigraphischen Information aus organischen Ablagerungen konnte eine neue klimatostratigraphische Tabelle des Pleistozäns für Schleswig-Holstein mit revidierter Gliederung des Mittel- und Oberpleistozäns erstellt werden. Die Pollensequenz der ältesten pleistozänen Warmzeit (Warmhörn-Thermomer) wird erstmals veröffentlicht. Das Unterpleistozän (Altpleistozän) und das untere Mittelpleistozän sind bei Lieth und bei Gorleben (Niedersachsen) in zwei kontinuierlichen Schichtfolgen vollständig dokumentiert, abgelagert in einem Wechsel von warmen und kalten Klimaphasen. Der oberste Abschnitt der Abfolge von Lieth und der unterste der Abfolge von Gorleben überlappen. Die kombinierte Abfolge bietet ein einzigartiges Referenzprofil für Korrelationen innerhalb Europas. Bisher wurden in Schleswig-Holstein nur drei Kaltzeiten mit Vergletscherungen nachgewiesen, Elster- und Saale-Kaltzeit im oberen Mittelpleistozän und die Weichsel-Kaltzeit im Oberpleistozän. Eine mögliche prä-elsterzeitliche Vergletscherung wird diskutiert. Die Holstein-Warmzeit wird mit MIS 9e korreliert. Das Saale umfasst einen unteren Abschnitt mit nicht-glaziären Kaltzeiten und mit Warmzeiten, der ‚Wacken-Warmzeit‘ (=Dömnitz) und der ‚Leck-Warmzeit‘, korreliert mit MIS 7e und MIS 7c, und einen glaziären oberen Abschnitt. Während des Weichsel gab es wahrscheinlich zwei Phasen mit Vergletscherung, die erste im frühen Mittelweichsel (‚Ellund-Phase‘, spätes MIS 4 oder/und frühes MIS 3), die zweite im oberen Weichsel (MIS 2). Die weichselzeitliche Vergletscherung Schleswig-Holsteins endet um 15 ka BP, als großflächige stagnierende Eisflächen und Toteismassen des Jungbaltischen Gletschervorstoßes (‘Mecklenburg-Phase’) schmolzen.
    Description: research
    Keywords: 551 ; pleistocene ; schleswig-holstein ; pléistocène ; correlations ; climato-stratigraphic table
    Language: English
    Type: article , Verlagsversion
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  • 2
    Publication Date: 2021-03-29
    Description: In Schleswig-Holstein detailed petrographical and palynological studies were undertaken with samples from exposures and core drillings examined over the last four decades. Analyses of the gravel fraction and ‘indicator rocks’ of glacial deposits were used for stratigraphical interpretations and correlation. Glaciofluvial sediments were dated by TL and OSL. Combined with the stratigraphical information from organic deposits, a new climato-stratigraphic table of the Pleistocene for Schleswig-Holstein with a revised subdivision of the Middle and Late Pleistocene could be established. The pollen sequence of the oldest Pleistocene warm phase (Warmhörn-Thermomer) is published for the first time. The complete Early Pleistocene and lower Middle Pleistocene stratigraphical sequence is documented at Lieth and at Gorleben (Lower Saxony) in two continuous successions of organic beds developed during warm phases alternating with cold phase deposits. The uppermost part of the Lieth succession and the lowermost part of Gorleben overlap. The combined succession provides a unique reference for correlations through Europe. No more than three cold stages involving glaciation are demonstrated to exist currently in Schleswig-Holstein, the Elsterian and the Saalian in the upper Middle Pleistocene, and the Weichselian in the Late Pleistocene. A possible pre-Elsterian glaciation is discussed. The Holsteinian is correlated with MIS 9e. The Saalian includes a lower part with non-glacial cold phases and warm phases, the ‘Wacken-Warmzeit’ (=Dömnitz) and the ‘Leck-Warmzeit’ correlated with MIS 7e and MIS 7c respectively, and a glacial upper part. During the Weichselian probably two phases of glaciation existed, the first in the early Middle Weichselian (‘Ellund-Phase’; late MIS 4 or/and the early MIS 3), the second in the Upper Weichselian (MIS 2). The Weichselian glaciation of Schleswig-Holstein ends around 15 ka BP when huge stagnant and dead ice masses of the Young Baltic glacier advance (‘Mecklenburg-Phase’) melted.
    Description: research
    Keywords: 551 ; pleistocene ; schleswig-holstein ; pléistocène ; correlations ; climato-stratigraphic table
    Language: English
    Type: article , Verlagsversion
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  • 3
    Publication Date: 2021-03-29
    Description: The Sophie’s Cave in Upper Franconia, Bavaria (South Germany) eroded into Upper Jurassic reef dolomite and is a perfect model including all three stages of cave development ranging from a 1. ponor cave, to 2. intermediate periodically flooded cave to 3. dry cave. The key position of the cave along the Ahorn Valley, a side valley of the larger Wiesent River Valley, allow a cave genesis and evolution reconstruction which started in the Pliocene. The main refill took place in the Quaternary with Middle to Late Pleistocene river terrace sediments, present as relict sediments. Seven valley genesis stages between Pliocene to final Late Pleistocene can be separated in elevations of 440 to 375 meters a.s.l. The lowering of the Ailsbach River in the Ahorn Valley is important to understand the accessibility of caves for Pleistocene animals and Palaeolithic humans in different valley positions and elevations during different times in Upper Franconia, and the natural erosive opening/closing of cave entrances towards drainage valleys.
    Description: research
    Keywords: 551 ; bavaria ; cave ; ice age ; Ahorn Valley ; Alsbach River ; terrace evolution ; bears ; humans ; Neanderthals ; Late Palaeolithics
    Language: English
    Type: article , Verlagsversion
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  • 4
    Publication Date: 2021-03-29
    Description: The paleosols of the Last Interglacial are presented in many loess sequences of the European temperate zone by soils with Argic horizon, that are considered to be the pedological response to the bioclimatic conditions of that period. We studied micromorphological, physical/chemical (bulk chemical composition, texture and dithionite-extractable iron) and mineralogical characteristics of two profiles – an Eemian Luvisol in Upper Austria (Oberlaab) and a Mikulino Albeluvisol in Central Russia (Alexandrov Quarry near Kursk) to compare them with recent analogous soils and to make further paleoecological and chronological inferences. Both profiles showed a set of characteristics indicative for weathering of primary minerals, clay transformation illuviation and surface redoximorphic (stagnic) processes. Paleosols demonstrate more advanced development than the Holocene analogues manifested however in different pedogenetic characteristics. The Eemian Luvisol in Upper Austria is characterized by stronger clay illuviation manifested in higher clay content and abundance of illuvial clay pedofeatures in the Bt horizon. Mikulino Albeluvisol in Central Russia is more strongly affected by eluvial and stagnic processes evidenced by deeper and more intensive accumulation of bleached silty material and clay depletion. We suppose that the properties of parent material are responsible for these differences. Russian Albeluvisol is formed on the Dnepr loess poor in weatherable minerals and having limited capacity for buffering acidity and clay formation. The higher development status of the Last Interglacial paleosols compared to the Holocene soils having however same type pedogenesis implies longer soil formation period, that agree with some of the paleobotanical proxies and could include besides MIS 5e part of MIS 5d; the warmer and moister paleoclimate during MIS 5e could also account for more advanced paleosol development Several phases of clay illuviation interrupted by frost structuring and deformation are detected in the Eemian Bt horizon in Upper Austria. It suppose even longer development that could extend to the Early Würmian interstadials (late substages of MIS5).
    Description: research
    Keywords: 551 ; paleosol ; paleoclimate ; last interglacial ; Argic horizon
    Language: English
    Type: article , Verlagsversion
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  • 5
    Publication Date: 2021-03-29
    Description: A detailed study of a loess-paleosol sequence in Oberlaab, Upper Austria, is presented with emphasis on macro- and micromorphological features, grain size distribution, rock magnetism properties, and weathering degree that allows correlation with other loess-paleosol sequences in neighboring areas, and interpretation of main pedogenic trends. The studied sequence comprises four paleosol complexes, which likely developed during four interglacial stages MIS 11, 9, 7 and 5e, and a modern soil. The oldest paleosol complex (OL5) represents three phases of soil formation, and distinct sedimentary events never reported in the area, with strong reductomorphic properties. The OL4 profile also results from three phases of pedogenesis with increased reductomorphic features in the deepest zone (affected by cryoturbation events). OL3 has abundant features related to gleyic/stagnic processes, but shows signs of clay illuviation. OL2 (Eemian soil) correlates with the MIS 5e. This paleosol shows higher degrees of clay illuviation and weathering, and fewer features related to reductomorphic processes. The modern soil is also polygenetic and constitutes a pedocomplex. Its lowermost part is formed by Würmian glacial deposits, where no well-developed soils are found; only reworked materials and pedosediments. Main pedogenic trends in the sequence are clearly differentiated. All of the paleosols were formed in humid environments, but differing in drainage conditions. The base, with OL5 and OL4 paleosols, was more affected by gleyic processes, while in the upper paleosols, especially OL2, clay illuviation is dominant. We interpret such differences to be caused by the topographic position. The basal paleosols were more affected by fluvioglacial processes due to their position on top of the terrace. The upper paleosols received increased amounts of sediment through fluvial, colluvial and aeolian (loess) input.
    Description: research
    Keywords: 551 ; loess ; paleosol ; pedogenesis ; middle pleistocene ; Oberlaab
    Language: English
    Type: article , Verlagsversion
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  • 6
    Publication Date: 2021-03-29
    Description: The more than 12 m thick loess-paleosol sequence in Paudorf, Lower Austria, has been known for decades as locus typicus of the “Paudorfer Bodenbildung” (Paudorf paleosol). The upper section of the outcrop contains an up to 1 m thick pedocomplex that developed during MIS 5. The differentiated sequence of loess-like sediment below, including a more than 2 m thick pedocomplex in its basal part, is an exceptional archive of landscape evolution from the Middle Pleistocene. Herein we present detailed paleopedological and sedimentological surveys, as well as first micromorphological observations to address the sequence in its entirety and the processes leading to its genesis. Furthermore, high resolution color and carbonate analyses, as well as detailed texture analyses, have resulted in a substantial database. The studies show that the loess sediments were subject to a polygenetic development under periglacial conditions reflected in eolian silt and fine sand accumulation, admixture of local material during (mostly solifluidal) redeposition and in situ processes. Horizons with signs of pedogenesis, particularly the two pedocomplexes, document longer phases of stability; the stages of development can be correlated to equivalent sequences and seen as paleoclimatic signals where chronological data are available. The upper pedocomplex is a Chernozem of the early last glacial (MIS 5c–[a?]), which developed in a solifluidal redeposited (MIS 5d) interglacial Cambisol (MIS 5e). Cryosols, typical for MIS 6 sequences, are present in the loess sediment below. The lower pedocomplex formed during several warm stages of varying intensities, with interruptions caused by colluvial processes and admixture of eolian sediment during colder stages.
    Description: research
    Keywords: 551 ; micromorphology ; loess ; lower austria ; paudorf ; middle pleistocene ; paleopedology ; landscape formation
    Language: English
    Type: article , Verlagsversion
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  • 7
    Publication Date: 2021-03-29
    Description: Die vorliegende Arbeit stellt die paläomagnetische Bearbeitung der Mittel- bis Oberpleistozänen Löss-/Paläoboden-Sequenz im Areal der ehemaligen Ziegelei Würzburger in Aschet bei Wels vor. Fünf intensiv entwickelte Paläoböden, bzw. Pedokomplexe wechseln mit dazwischen geschalteten Lößlehmlagen ab. Im Rahmen einer Aufbaggerung konnte ein Profil mit einer Mächtigkeit von über 12 m erschlossen werden. Für die magnetostratigraphischen Laboruntersuchungen im Paläomagnetiklabor der Montanuniversität Leoben wurden insgesamt 587 orientierte Proben entnommen, so dass eine beinahe lückenlose Beprobung vorliegt. Die Proben wurden mit magnetischen Wechselfeldern sowie thermisch abmagnetisiert. Zur Bestimmung der magnetischen Trägerminerale in den Sedimenten wurden Curiepunkt-Bestimmungen durchgeführt, die eine Hauptträgerphase mit einem Curie-Punkt bei ca. 580°C (Magnetit), sowie untergeordnete Anteile von Hämatit mit 670°C Curie-Punkt ergaben. Die magnetischen Parameter zeigen eine Folge von Bereichen mit intensiver Magnetitbildung in den Paläoböden, die dem relativ wärmeren Klima von Interglazialen zugeordnet werden können. Die Mehrzahl der Proben zeigen charakteristische Remanenzrichtungen im Bereich des normalen pleistozänen Erdmagnetfeldes. In einigen Profilabschnitten traten stark abweichende Remanenzrichtungen auf, die auf Exkursionen des Erdmagnetfeldes hinweisen. Die beobachteten Exkursionen im Profil Wels-Aschet werden aufgrund paläopedologischer-pedostratigraphischer Ergebnisse in das Zeitintervall von 570 ka (Emperor - Big Lost - Calabrian Ridge) bis 110 ka (Blake) gestellt. Die Brunhes/Matuyama-Grenze (776 ka) wurde nicht erreicht.
    Description: research
    Keywords: 551 ; pleistocene ; loess ; pléistocène ; chronostratigraphy ; palaeosol ; upper austria ; magnetic excursion ; rock magnetic properties
    Language: English
    Type: article , Verlagsversion
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  • 8
    Publication Date: 2021-03-29
    Description: Auf den mittelpleistozänen fluvioglazialen Terrassen der Traun-Enns-Platte in der Region um Wels (Oberösterreich) wurden drei Löss-/Paläobodensequenzen untersucht. Jedes dieser Profile ist für mittelpleistozäne Abfolgen im nordöstlichen Alpenvorland charakteristisch. Die Profile umfassen mächtige Pedokomplexe, welche eine Differenzierung und Einstufung von interglazialen Paläoböden erlauben. Die Löss-/Paläobodensequenz von Oberlaab ist auf der fluvioglazialen Terrasse des Mindel-Glazials im klassischen Sinne entwickelt (Jüngere Deckenschotter) und weist vier interglaziale Paläoböden auf. Diese Tatsache macht eine Einstufung der Jüngeren Deckenschotter mindestens in die fünftletzte Kaltzeit wahrscheinlich (MIS 12). Die Deckschichten auf den Günz-Deckenschottern im klassischen Sinn (Ältere Deckenschotter) beinhalten fünf Paläoböden. Beide Lokalitäten weisen eine sehr intensive Pedogenese in ihrem basalen Pedokomplex auf, die wesentlich ausgeprägter ist, als in den überlagernden Paläoböden. Die pedostratigraphischen Ergebnisse lassen eine Einstufung der Älteren Deckenschotter mindestens ins MIS 16 zu.
    Description: research
    Keywords: 551 ; loess ; quaternary stratigraphy ; Wels-Aschet ; Oberlaab ; landscape formation ; palaeosol
    Language: English
    Type: article , Verlagsversion
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  • 9
    Publication Date: 2021-03-29
    Description: Grain size analyses, bulk and clay mineralogical data were used to characterize weathering within the loess-paleosol-sequence of Oberlaab in Upper Austria. Soil horizons can be clearly identified by the calculation of weathering index Kd from granulometric parameters. The mineralogical composition of the bulk samples shows increasing weathering intensity from the top to the bottom. The weakest weathering stage 1 is not present in Oberlaab, because all samples are free of carbonate minerals. Weathering stage 2 can be found in the upper part of the profile, whereas stage 3 is mainly present in the lowermost horizons. The highest weathering stages 4 and 5 are not present in Oberlaab. The clay mineral distribution in the profile is dominated by the disappearance of primary chlorite in the upper part of the profile and the neoformation of vermiculites from illite by pedogenesis in the lower part. Two different types of mixed layer minerals were found in the pedocomplexes. An illite/chlorite mixed layer mineral occurs following the disappearance of chlorite and is present in the Eemian luvisol. The second mixed layer mineral consists of illite/vermiculite and is present in the whole profile. The weathering stages obtained from the clay mineral composition are slightly lower than that of bulk mineralogy, but reach as well stage 3 in the lower part of the profile.
    Description: research
    Keywords: 551 ; paleosols ; clay minerals ; vermiculite ; secondary chlorite ; weathering index Kd
    Language: English
    Type: article , Verlagsversion
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  • 10
    Publication Date: 2021-03-29
    Description: The route of the field trip described in this excursion guide follows a section through Germany from North to South, from the area of the Northern glaciation, to the Alpine glacial advances. It includes several places of historical importance, where milestones in Quaternary research have been achieved in the past, as well as new interesting sites where results of recent research is presented.
    Description: excursionguide
    Keywords: 551 ; V 000 ; VCA 520 ; Geologische Wissenschaften ; Quartärgeologie ; coastal evolution; Rügen ; Geopark Mecklenburg Ice Age Landscape ; tourism ; quaternary ; Halle ; Main ; sedimentology ; landslide ; natural hazards ; danube ; rhine ; pleistocene ; holocene ; geology
    Language: English
    Type: anthology , publishedVersion
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  • 11
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    Geozon Science Media
    Publication Date: 2021-03-29
    Description: Die Umgebung von Bayreuth sticht durch ungewöhnliche Vielfalt geologischer und tektonischer Besonderheiten hervor. Gesteine vom Altpaläozoikum bis zum Quartär treten auf. Das „Fränkische Lineament“ nebst der ihm vorgelagerten „Bruchschollenzone“ in mesozoischen Sedimentgesteinen, der Eklogit vom Weißenstein (einziger europäischer Eklogit nördlich der Alpen) und quartäre Vulkanite, mit denen sich schon Johann Wolfgang von Goethe beschäftigt hat, sind einzigartige Zeugnisse vielseitiger endogener Prozesse in der Umgebung von Bayreuth. Der vorliegende Band „DEUQUA EXCURSIONS“ wurde für die 36. Tagung der DEUQUA in Bayreuth vom 16. bis 20. September 2012 erstellt und umfasst sechs Exkursionen in der Region.
    Description: excursionguide
    Keywords: 551 ; VEB 212 ; VEB 148 ; Bayern {Geologie} ; Oberfränkisch-oberpfälzisches Schollenland {Geologie} ; field trip ; Exkursion ; Bayreuth ; landscape development ; quaternary ; paleozoic ; Archäologie ; Archaeology ; Landschaftsentwicklung
    Language: English
    Type: anthology , publishedVersion , anthology
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  • 12
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    GEOMAR, Helmholtz-Zentrum für Ozeanforschung Kiel und Institut für Geowissenschaften der Universität Kiel
    Publication Date: 2021-03-29
    Description: The 14th Symposium on Tectonics, Structural Geology and Geology of Crystalline Rocks (TSK14) is the first TSK meeting to be held on the coast. Northern Germany is void of metamorphic and structural geology outcrops and study of their processes requires going underground into salt mines or driving as far as the Harz Mountains. This is precisely what we will do for the field trip. Nevertheless, marine research is much closer to the TSK topics than might be expected. The plate tectonics revolution in the end of the 60s of last century would not have been possible without research on the oceans. Many structural concepts for deformed rock associations found on the continents have their modern counterparts below the oceans. Today, marine research cruises contribute significantly to tectonic research using a multitude of geophysical methods, sampling of the ocean floor, and deep sea drilling. The collaborative research center (SFB) 574 "Volatiles and Fluids in Subduction Zones", a joint research venture between Christian- Albrechts-University Kiel and the GEOMAR Helmholtz Centre for Ocean Research Kiel, combines marine and onshore research on subduction zone processes in Central and South America. Among other topics the DFG-funded Excellence Cluster “The Future Ocean” is concerned with marine geohazards and georesources and, thus, tectonic studies. Related results in marine geophysics, tectonics, metamorphic and magmatic petrology will be presented during TSK14, as well as several results from other marine and onshore research projects. We also invite you to gather some deeper insights into our work and our research facilities. The program of the symposium covers a wide range of current research in tectonics, geodynamics, structural geology and metamorphic petrology. We were overwhelmed by the large variety and the high quality of the submitted contributions. As the contributions did not go through a peer-review, the authors remain responsible for the content of their abstracts. There will be talks and posters on all of the six initially announced topics 1) Subduction zones and collisional orogens, 2) Rifting, spreading and transform faults, 3) Metamorphism, deformation and geochronology, 4) Fabrics, rheology and deformation mechanisms, 5) Brittle deformation, neotectonics and earthquake processes, 6) Pluton emplacement, volcano-tectonics und impact geology, with many contributions covering two and more of them.
    Description: Das 14. Symposium 'Tektonik-Strukturgeologie-Kristallingeologie' (TSK 14) ist das erste TSKTreffen, das an der Küste stattfindet. Norddeutschland ist frei an metamorphen und strukturgeologischen Aufschlüssen, und diese Forschung erfordert Untertagearbeit in Salzbergwerken oder Fahrten zumindest bis zum Harz. Genau dies ist für die Exkursion vorgesehen. Ungeachtet dessen liegt die Meeresforschung näher an den TSK-Themen, als es vielleicht erwartet wird. Die plattentektonische Revolution am Ende der 60er Jahre des letzten Jahrhunderts wäre ohne Meeresforschung nicht möglich gewesen. Viele strukturelle Konzepte deformierter Gesteinsvergesellschaftungen auf den Kontinenten finden ihre modernen Gegenstücke unter den Ozeanen. Heute tragen marine Forschungsfahrten durch die Anwendung geophysikalischer Methoden, Probennahmen vom Meeresboden oder Tiefseebohrprojekte bedeutend zur tektonischen Forschung bei. Der Sonderforschungsbereich SFB 574 "Volatile und Fluide in Subduktionszonen", ein Forschungsprogramm der Christian-Albrechts-Universität Kiel und des GEOMAR Helmholtz Zentrums für Ozeanforschung Kiel, verbindet Forschung im Meer und an Land zur Untersuchung von Subduktionszonen- Prozessen in Zentral- und Mittelamerika. Der von der DFG geförderte Exzellenzcluster "Ozean der Zukunft" befasst sich neben anderen Themen mit marinen Geogefahren und Georessourcen und somit mit tektonischen Studien. Damit verbundene Ergebnisse der marinen Geophysik, Tektonik, metamorphen und magmatischen Petrologie als auch Ergebnisse weiterer Meeres- und Küstenforschungsprojekte werden auf der TSK14 vorgestellt. Wir laden Sie auch ein, einen tieferen Einblick in unsere Forschungstätigkeit und Forschungseinrichtungen zu gewinnen. Das Programm des Symposiums umfasst eine weite Bandbreite aktueller Forschung in Tektonik, Geodynamik, Strukturgeologie und metamorpher Petrologie. Wir waren überwältigt von der großen Vielfalt und der hohen Qualität der eingereichten Beiträge. Da die Beiträge nicht begutachtet wurden, sind die Autoren allein für die Inhalte ihrer Kurzfassungen verantwortlich. Es wird Vorträge und Poster zu allen ursprünglich angekündigten Themenbereichen geben: 1) Subduktionszonen und Kollisionsorogene, 2) Rifting, Spreading und Transformstörungen, 3) Metamorphose, Deformation und Geochronologie, 4) Gefüge, Rheologie und Deformationsmechanismen, 5) Bruchhafte Deformation, Neotektonik und Erdbebenprozesse, 6) Platznahme von Plutonen, Vulkanotektonik und Impaktgeologie, wobei viele Beiträge zwei und mehr von diesen abdecken.
    Description: conference
    Keywords: 551 ; VAE 000 ; VAC 100 ; VAEA 000 ; VAE 100 ; VAE 200 ; Tektonik ; Strukturgeologie ; Tektonik {Geologie} ; Magmatismus im allgemeinen {Geologie} ; Metamorphose {Geologie} ; Strukturgeologie ; Geodynamik ; Kristallin
    Language: English
    Type: anthology , publishedVersion
    Format: 118 S.
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  • 13
    Publication Date: 2021-05-07
    Description: Eine räumliche Kompilation und Darstellung von Löss-Parametern wurde für die pleistozänen Lösse und löss-ähnlichen Sedimente im Weser-Aller-Einzugsgebiet (Süd-Niedersachsen und Nordhessen, NW-Deutschland), einer der Lössregionen in Mitteleuropa, durchgeführt. Erstmals wurden Daten, soweit verfügbar, über die wichtigsten Lösseigenschaften, wie Mächtigkeit, Granulometrie und Stratigraphie mit räumlichen Informationen von Karten kombiniert und ausgewertet. Die Datenerfassung und – analyse in einem Geographischen Informationssystem (GIS) ermöglichte die Ableitung großformatiger thematischer Lösskarten. Daten über Lössmächtigkeiten wurden analysiert und zu einer regionalen Mächtigkeitskarte kompiliert. Zusätzlich dazu wurden zahlreiche Lössvorkommen mit anormaler Mächtigkeit aufgrund spezieller geologischer und geomorphologischer Bedingungen abgegrenzt. Mehrere Lössregionen mit unterschiedlicher granulometrischer Fazies wurden ausgeschieden. Zudem konnten regionale Lössdecken unterschiedlichen Alters kartiert werden. Die Lössdecken im nördlichen Teil des Untersuchungsgebietes haben jungweichselzeitliches Alter, dagegen wurden im Bergland Regionen mit unvollständigen und gut gegliederten weichselzeitlichen Lössabfolgen nachgewiesen. Die Ergebnisse der Untersuchung zeigen, dass auf der Grundlage veröffentlichter, heterogener Daten neue Aspekte und regionale Muster abgeleitet werden können.
    Description: research
    Keywords: 551 ; 551.7 ; VAR 000 ; Glazialgeologie ; pleistocene ; loess ; pléistocène ; weichselian ; nw germany ; loess-like deposits ; spatial analysis
    Language: English
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  • 14
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    Univ. Stuttgart
    Publication Date: 2021-03-29
    Description: In this work the dune model introduced by Sauermann et al. (2001) is extended and applied to investigate the formation of different dune shapes on Mars and on Earth as function of wind directionality and sand availability. The formation of sand dunes on Mars under the present atmospheric conditions of the red planet is studied and conclusions about wind speed, migration velocity of dunes and changing wind regimes on Mars are presented. Field measurements of the shape of coastal transverse dunes are presented and the formation of coastal dune fields is explained. Finally, the formation of linear dunes by bimodal wind regimes is calculated. The simulations explain the appearance of exotic bimodal dune shapes in areas of low sand availability on Mars and on Earth.
    Description: thesis
    Keywords: 523 ; 551 ; 550 ; TGG 545 ; VAN 100 ; Marsoberfläche {Astronomie} ; Abspülung {Geologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 171 S.
    Format: application/pdf
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  • 15
    Publication Date: 2021-03-29
    Description: Marine snow, underwater cameras, particle flux, aggregation, suspended particulate matter, particle transport. - This study focusses on the vertical distribution and transportation pathways of marine particles off NW-Africa with aid of optical methodologies. A profiling camera system and a remotely operated vehicle (ROV) was used for in-situ observations on the distribution, transport processes and sinking behaviour of marine particulate matter. Between the regional areas of investigation Cape Blanc, Dakhla and Cape Bojador significant differences could be observed with respect to distribution and transportation patterns. These differences are primarily related to the different primary production conditions between the investigation areas. Primary production is the most important factor for the abundance of particulate matter, where highest particle concentrations in the entire water column were seen off Cape Blanc. Next to primary production, water depth, currents and density gradients are factors influencing the particle distribution patterns. With respect to the prevailing transport processes, the Cape Blanc region is characterised by vertically orientated transport patterns. In addition to the continuous supply of large, relatively fast sinking particle aggregates a sinking event could be documented for the first time in-situ in the water column. These events deliver huge amounts of particulate matter from the ocean surface ...
    Description: thesis
    Keywords: 551
    Language: English
    Type: monograph , publishedVersion
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  • 16
    Publication Date: 2021-03-29
    Description: Madagascar; Jurassic; Karoo; Gondwana; Breakup; Rift; Microfauna; Macrofauna; Ammonites; Indian Ocean. - The breakup of Gondwana along the former East African Orogen is widely interpreted to have lasted from the Late Palaeozoic to the Callovian. The present study indicates that the Permian-Triassic or Karoo phase of rifting was not responsible for the separation of East- and West-Gondwana, since that rift system failed in the Late Triassic. Instead the breakup of Gondwana occurred in the Late Liassic. The pre-rift phase in the Morondava Basin is represented by the Karoo deposits, and the syn-rift phase is recorded by Toarcian marine shales, locally overlain by Aalenian sandstones. A major Early Bajocian unconformity is interpreted as the breakup unconformity. The initial post-rift or drift phase is represented by the Bajocian-Bathonian carbonates, marls and sandstones of coastal plain environment and a coastal barrier/lagoon complex. During the Bathonian the siliciclastic shoreface system moved basinward. Callovian-Early Kimmeridgian shales with interbedded iron-oolites represent ...
    Description: thesis
    Keywords: 551 ; VAE 500 ; VDB 100 ; VEQ 300 ; Geotektonische Entwicklung der Erdkruste {Geologie} ; Gondwana ; Madagaskar {Geologie}
    Language: English
    Type: monograph , publishedVersion
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  • 17
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; VBQ 900 ; VBQ 800 ; VEO 170 ; Hydrogeologie einzelner Regionen ; Aquifere {Hydrogeologie} ; Sudan {Geologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 133 S.
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  • 18
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; VOO 000 ; VAJ 400 ; Bodenerosion ; Abtragung durch Erosion {Geologie}
    Language: Spanish
    Type: monograph , publishedVersion
    Format: 359 S.
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  • 19
    Publication Date: 2021-03-29
    Description: In the unglaciated areas of Antarctica, lake sediments act as archives of the regional environmental and climatic history. In most cases, the records are restricted to the Holocene. Amongst the few exceptions are lakes in the McMurdo Dry Valleys, southern Victoria Land, which are known to have remained mostly ice-free during the Last Glacial Maximum. Within the scope of an U.S.-American-German expedition in austral summer 2002/2003, several sediment cores were recovered from the three major lakes in the Taylor Valley: lakes Fryxell, Hoare, and Bonney. In order to reconstruct the late Quaternary regional environmental and climate history, sedimentological, biogeochemical, mineralogical, and chronological investigations were conducted on the sediment sequences recovered from Lake Hoare (core Lz1020) and East Lake Bonney (core Lz1023) within the scope of this thesis. Sediment cores from Lake Hoare with a maximum length of 2.3 m mainly consist of coarse-grained material and penetrate back into the late Weichselian, when Taylor Valley was occupied by the large proglacial Lake Washburn. This lake was dammed by the advanced Ross Sea ice sheet at the valley outlet and was mainly fed by meltwater of the ice sheet. During the Pleistocene-Holocene transition, enhanced evaporation led to a significant lake level drop of Lake Washburn ...
    Description: thesis
    Keywords: 551 ; 550 ; TWC 500 ; VDI 200 ; VAU 000 ; VEY 200 ; VBN 500 ; VBL 500 ; Klimaschwankungen und Klimaänderungen im Quartär ; Quartär ; Paläolimnologie {Geologie} ; Antarktis {Geologie} ; Geochronologie einzelner Regionen im allgemeinen ; Geologische Bohrungen in einzelnen Regionen
    Language: English
    Type: monograph , publishedVersion
    Format: 121 S.
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  • 20
    Publication Date: 2021-03-29
    Description: Eleven lakes and ponds and three lacustrine sediment sequences from coastal East and North-East Greenland were studied for recent hydrological and phytoplankton characteristics and for palaeolimnology, respectively. The limnological survey of lakes and ponds from Store Koldewey in summer 2003 revealed cold, monomictic, thermally unstratified, alkaline and likely oligotrophic water bodies. The diatom phytoplankton, present in six lakes and dominated by four species, varied distinctly between the lakes. The results give information about the recent status of the ecology of these High Arctic freshwater bodies. The sediment sequences were investigated for their chronology, changes in physical and biogeochemical properties, macro- and microfossils, grain-size distribution and in the case of one sequence for its elemental profiles using XRF. The palaeolimnological studies address different time intervals at various temporal resolutions with particular attention to the latitudinal differences of late Quaternary climatic and environmental changes along the coast of East and North-East Greenland. The results include information about the Late Weichselian ice-front environments on southern Store Koldewey with information about the temporal and spatial evolution of the Greenland Ice Sheet margin west of the island ...
    Description: thesis
    Keywords: 551 ; 550 ; TWC 500 ; VDI 200 ; VAU 000 ; VEY 110 ; VBN 500 ; VBL 500 ; Klimaschwankungen und Klimaänderungen im Quartär ; Quartär ; Paläolimnologie {Geologie} ; Grönland {Geologie} ; Geochronologie einzelner Regionen im allgemeinen ; Geologische Bohrungen in einzelnen Regionen
    Language: English
    Type: monograph , publishedVersion
    Format: 148 S.
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  • 21
    Publication Date: 2021-03-29
    Description: The polar ice sheets are unique paleoclimatic archives and play an important role in recent and future climate. The melting of the big freshwater reservoirs will not only increase the global sea level, but will also influence the ocean currents. Therefore, it will be of particular interest to improve the currently available numeric climate models to achieve more accurate statements about climatic change and its consequences. In this work, the evaluation and the different applications of GPS and altimetry data will be described in respect to enhance models. The antarctic area of investigation, Dronning Maud Land (DML), is of particular interest for German polar research, because both the overwintering station Neumayer and the summer station Kohnen are located within it. In the surroundings of these two stations, highly accurate kinematic GPS measurement were made, which will be the basis for the digital elevation model presented here. Because these data are spatially limited, they are supplemened with remotely sensed data. For this purpose, two airborne altimetry data sets and spaceborne laser altimetry data of the Ice, Cloud, and land Elevation Satellite (ICESat) are used...
    Description: thesis
    Keywords: 551.312 ; 551 ; 550 ; TWC 600 ; VAR 980 ; TQI 000 ; TSY 200 ; Geophysikalische Satellitenfernerkundung ; Antarktis {Geophysik}
    Language: English
    Type: monograph , publishedVersion
    Format: 140 S.
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  • 22
    Publication Date: 2021-03-29
    Description: Diese Arbeit beschäftigt sich mit der Verknüpfung von manuellen und automatischen Inversionmethoden für die Interpretation gravimetrischer Anomalien. Eine neue Software mit dem Namen 3GRAINS wird vorgestellt. Sie wurde für das manuelle Modellieren entwickelt und benutzt rechteckförmige Prismen zur Berechnung des gravimetrischen Effekts eines Modells. Die Software bietet eine graphische Benutzeroberfläche, um eine komfortable Arbeit mit einer modellierten Struktur zu ermöglichen. Ein automatischer Inversionsalgorithmus basiert auf der Idee der evolutionären Berechnung. Die dargestellten Methoden werden auf die Interpretation der gravimetrischen Anomalien der Hellenischen Subduktionszone angewendet. Die tektonische Situation dieser Region und seismische Beobachtungen werden vorgestellt. Der Prozess der Datengewinnung und der Datenbearbeitung wird beschrieben. Schließlich werden die Ergebnisse der Interpretation der gravimetrischen Anomalien präsentiert.
    Description: thesis
    Keywords: 551 ; 622.15 ; 550 ; TOF 000 ; TQA 000 ; TSF 300 ; VAE 880 ; VEF 300 ; Schwerkraft {Geophysik} ; Gravimetrische Verfahren {Geophysik} ; Griechenland und griechische Inseln {Geophysik} ; Passive und aktive Kontinentalränder {Geologie} ; Griechenland und griechische Inseln {Geologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 139 S.
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  • 23
    Publication Date: 2021-03-29
    Description: Central Asia is characterized by a number of spectacular tectonic units such as the Tibetan Plateau, the Tien Shan intra-continental mountain belt and the Altyn Tagh strike-slip fault. Deformation of the lithosphere of these units is not well understood. In this dissertation, an attempt is made to answer the following tectonic questions: To what extent do the tectonic units formed in the upper crust in the course of the convergence between India and Eurasia weaken the underlying lithosphere? How is the Tibetan Plateau gravita-tionally compensated along its northern boundary? Do the Altyn Tagh and/or West Kunlun faults persist as vertical strike-slips throughout the crust and mantle lithosphere, thus representing a fundamental plate boundary? Which dynamic processes in the crust and mantle of the Tien Shan are responsible for intra-continental mountain building? What characterizes the local stress field in the Tien Shan and what causes the deformation of these mountains? To answer these questions, the elastic plate theory is used to interpret gravity and topography data, and in turn to derive specific characteristics of the lithospheric structure in Central Asia. Theoretical deflection of the elastic plate or plates were calculated using the 3D and 2D finite-difference methods. Variable-rigidity elastic plates are subjected to vertical and horizontal loads, shear forces, and terminal bending moments. Surface topo-graphic data from the Topo30 dataset is used as vertical surface loading to calculate the flexure of the elastic lithosphere...
    Description: thesis
    Keywords: 551.8 ; 622.15 ; 551 ; 550 ; VAE 400 ; VEK 000 ; TQA 000 ; TSK 000 ; VAE 400 ; VEK 000 ; TQA 000 ; TSK 000 ; Tektogenese {Geologie} ; Zentralasien {Geologie} ; Gravimetrische Verfahren {Geophysik} ; Zentralasien {Geophysik}
    Language: English
    Type: monograph , publishedVersion
    Format: 136 Bl.
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  • 24
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; UNC 300 ; Höhe {Praktische Geodäsie}
    Language: English
    Type: monograph , publishedVersion
    Format: 163 S.
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  • 25
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; VAE 890 ; VAE 130 ; VBE 000 ; TOE 000 ; TSX 500 ; VEX 500 ; Ozeanische Kruste {Tektonik} ; Geomechanik ; Modellierung von Prozessen in der Geosphäre ; Physikalisches Verhalten der Erde {Geophysik} ; Chile {Geophysik} ; Chile {Geologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 118 S.
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  • 26
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    GFZ, Helmholtz-Zentrum
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; TSX 500 ; VEX 100 ; VEX 500 ; VAE 500 ; TOH 800 ; Chile {Geophysik} ; Anden {Geologie} ; Chile {Geologie} ; Geotektonische Entwicklung der Erdkruste {Geologie} ; Paläoerdbeben {Geophysik}
    Language: English
    Type: monograph , publishedVersion
    Format: 108 S.
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  • 27
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    GFZ, Helmholtz-Zentrum
    Publication Date: 2021-03-29
    Description: Ein transversales Störungssystem im Nahen Osten, die Dead Sea Transform (DST), trennt die Arabische Platte von der Sinai-Mikroplatte und erstreckt sich von Süden nach Norden vom Extensionsgebiet im Roten Meer über das Tote Meer bis zur Taurus-Zagros Kollisionszone. Die sinistrale DST bildete sich im Miozän vor etwa 17 Ma und steht mit dem Aufbrechen des Afro-Arabischen Kontinents in Verbindung. Das Untersuchungsgebiet liegt im Arava Tal zwischen Totem und Rotem Meer, mittig über der Arava Störung (Arava Fault, AF), die hier den Hauptast der DST bildet. Eine Reihe seismischer Experimente, aufgebaut aus künstlichen Quellen, linearen Profilen über die Störung und entsprechend entworfenen Empfänger-Arrays, zeigt die Untergrundstruktur in der Umgebung der AF und der Verwerfungszone selbst bis in eine Tiefe von 3-4 km. Ein tomographisch bestimmtes Modell der seismischen Geschwindigkeiten von P-Wellen zeigt einen starken Kontrast nahe der AF mit niedrigeren Geschwindigkeiten auf der westlichen Seite als im Osten. Scherwellen lokaler Erdbeben liefern ein mittleres P-zu-S Geschwindigkeitsverhältnis und es gibt Anzeichen für Änderungen über die Störung hinweg ...
    Description: thesis
    Keywords: 551 ; VAE 850 ; TQC 220 ; TSI 000 ; VEI 400 ; Festländische Lineamente {Geologie} ; Reflexionsseismik {Geophysik} ; Vorderasien {Geophysik} ; Israel, Palästina {Geologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 142 S.
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  • 28
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    GFZ, Helmholtz-Zentrum
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TQH 000 ; TQA 000 ; TOF 000 ; Aerogeophysik ; Gravimetrische Verfahren {Geophysik} ; Schwerkraft {Geophysik}
    Language: English
    Type: article , publishedVersion
    Format: 48 S.
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  • 29
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    GFZ, Helmholtz-Zentrum
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551
    Language: English
    Type: article , publishedVersion
    Format: 106 S.
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  • 30
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TOB 300 ; TOD 500 ; TOF 000 ; TOT 400 ; Polbewegungen {Geophysik: Erde} ; Erdkern {Geophysik} ; Schwerkraft {Geophysik} ; Magnetfeld der Erde im allgemeinen {Geophysik}
    Language: English
    Type: article , publishedVersion
    Format: 15 S.
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  • 31
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 518.64 ; 551 ; TOD 400 ; TOE 000 ; TM 300 ; Erdmantel {Geophysik} ; Physikalisches Verhalten der Erde {Geophysik} ; Methodik. Arbeitsmittel. Abkürzungsverzeichnisse {Geophysik}
    Language: English
    Type: monograph , publishedVersion
    Format: 186 S.
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  • 32
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    GFZ, Helmholtz-Zentrum, Potsdam
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TOF 000 ; TOB 100 ; Schwerkraft {Geophysik} ; Drehbewegungen {Geophysik: Erde}
    Language: English
    Type: article , publishedVersion
    Format: 35S.
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  • 33
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    GFZ, Helmholtz-Zentrum
    Publication Date: 2021-03-29
    Description: lecture
    Keywords: 551
    Language: English
    Type: anthology , publishedVersion
    Format: 675 S.
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  • 34
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    GFZ, Helmholtz-Zentrum
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TOB 100 ; Drehbewegungen {Geophysik: Erde}
    Language: English
    Type: article , publishedVersion
    Format: 8 S.
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  • 35
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    GFZ, Helmholtz-Zentrum
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TOB 300 ; Polbewegungen {Geophysik: Erde}
    Language: English
    Type: article , publishedVersion
    Format: 9 S.
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  • 36
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    GFZ, Helmholtz-Zentrum
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551
    Language: English
    Type: article , publishedVersion
    Format: 39 S.
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  • 37
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551
    Language: English
    Type: article , publishedVersion
    Format: 28 S.
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  • 38
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    GFZ, Potsdam | [Bibliothek des Wiss.-Parks Albert Einstein] [Vertrieb], [Potsdam]
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; VAE 140 ; VAE 820 ; VAE 160 ; VEB 110 ; TSB 000 ; VBM 000 ; Gesteinsdeformation {Strukturgeologie} ; Sedimentationsbecken als Erdkrustentypen {Geologie} ; Salztektonik {Strukturgeologie} ; Norddeutsche Senke {Geologie} ; Mitteleuropa {Geophysik} ; Geologische Interpretation geophysikalischer Beobachtungen
    Language: English
    Type: monograph , publishedVersion
    Format: 105 S.
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  • 39
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TVA 000 ; TVM 800 ; TUB 000 ; Ionosphäre {Meteorologie} ; Struktur der Atmosphäre {Meteorologie} ; Atmosphärische Schwerewellen {Meteorologie} ; Beobachtungsergebnisse {Meteorologie}
    Language: English
    Type: article , publishedVersion
    Format: 96 S.
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  • 40
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    GFZ, Helmholtz-Zentrum | [Bibliothek des Wiss.-Parks Albert Einstein] [Vertrieb], [Potsdam]
    Publication Date: 2021-03-29
    Description: The glacial-isostatic adjustment in Iceland resulting from the recent melting of the Vatnajökull ice cap is controlled by the viscosity distribution in the earth's interior and by the details of the melting history. Interpretations of the results of GPS and gravity measuring campaigns in the time interval 1991-2000 and 1992-1999, respectively, by means of laterally homogeneous earth models for the determination of the lithosphere thickness, the asthenosphere thickness and the asthenosphere viscosity have so far been not fully satisfactory. In particular near the ice margin, the fitting of the computed land uplift and gravity change to the observational data was inadequate, which may be related to the neglegt of the Iceland plume in the laterally homogeneous earth models. In the present study, a program package is used for the modelling of the land uplift and gravity change that allows the computation of load-induced perturbations of a Maxwell-viscoelastic, incompressible, self-gravitating, spherical earth model. To simulate the presence of the plume below the Vatnajökull, an axisymmetric viscosity distribution is used, where the plume radius and the plume viscosity are free parameters. Based on seismic results, a 6-km-thick lithosphere is assumed above the plume, which thickens to 35 km in the peripheral region of the plume. The melting history of the Vatnajökull is founded on interpretations of geomorphological and climatological investigations and is simulated by a load co-axial with the plume with parabolic profile and time-dependent radius. The results of the modelling favour a plume radius of ~80 km and a plume viscosity of (0.3-1.0) x 10^{18} Pa s.
    Description: report
    Keywords: 551
    Language: English
    Type: article , publishedVersion
    Format: 20 S.
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  • 41
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    GFZ, Helmholtz-Zentrum | [Bibliothek des Wiss.-Parks Albert Einstein] [Vertrieb], [Potsdam]
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; VAE 300 ; TQI 000 ; UNH 100 ; Epirogenese {{Geologie}} ; Geophysikalische Satellitenfernerkundung ; GPS {Praktische Geodäsie}
    Language: English
    Type: article , publishedVersion
    Format: 28 S.
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  • 42
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    GFZ, Helmholtz-Zentrum | [Bibliothek des Wiss.-Parks Albert Einstein] [Vertrieb], [Potsdam]
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551
    Language: English
    Type: article , publishedVersion
    Format: 228 S.
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  • 43
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    GFZ, Helmholtz-Zentrum | [Bibliothek des Wissenschaftsparks Albert Einstein] [Vertrieb], [Potsdam]
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; TOH 530 ; VAE 200 ; VAE 130 ; Häufigkeit und Verbreitung von Erdbeben {Geophysik} ; Geodynamik der Lithosphäre {Geologie} ; Geomechanik
    Language: English
    Type: monograph , publishedVersion
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  • 44
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    Dteutsche Gesellschaft für Geowissenschaften, Hannover
    Publication Date: 2021-03-29
    Description: The Nördlinger Ries is a circular, flat depression of 22-24 km diameter separating the Jurassic limestone plateaus of the Franconian and Swabian Alb in Southwest-Germany. Its centre is located 110 km NW of Munich, 70 km SSW of Nuremberg and 110 km E of Stuttgart. The Ries basin was formed approximately 15 Million years ago (Gentner & Wagner, 1969; Staudacher et al., 1982) by an impact of a stony meteorite less than 1 km in size (Shoemaker & Chao, 1961; Stöffler, 1977). The Ries crater represents one of the best preserved and best investigated impact structures on Earth (Bayerisches Geologisches Landesamt 1969, 1974, 1977; Hüttner & Schmidt-Kaler 1999; Stöffler & Ostertag 1983). It gained wide public attention (e.g., Metz 1974, Steinert 1974, Lemcke 1981, Kavasch 1985, Pösges & Schieber 1994; Schieber 2004) and served as training site for Apollo 17 astronauts in August 1970 (e.g., Margolin 2000). However, apart from its impact nature, the Ries basin offers a great opportunity to study fossil lacustrine microbialites. Such lacustrine deposits within impact structures are of increasing interest for understanding the origin and evolution of early life on Earth, and possibly other planets (Cockell & Lee 2002, Osinski et al. 2005, Cabrol et al. 2001). Therefore, the focus on this field trip is on microbial and algal build-ups, their facies context, and the discussion of microbial effects and lake water chemistry.
    Description: excursionguide
    Keywords: 551 ; VKB 380 ; VEB 147 ; VDI 121 ; VKB 376 ; VAE 150 ; Sedimente bestimmter Regionen ; Schwäbische Alb und Fränkische Alb {Geologie} ; Miozän ; Organogene Sedimentgesteine ; Strukturelle Erscheinungen {Strukturgeologie} ; Ries ; Geologie ; Geologie ; Seesediment ; Biogenes Sediment ; 38.44 ; 38.28
    Language: English
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  • 45
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    Geologisches Institut der Georg-August-Universität Göttingen, Göttingen
    Publication Date: 2021-03-29
    Description: research
    Keywords: 551 ; VU 000 ; Geobiologie
    Language: English
    Type: anthologyArticle , publishedVersion
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  • 46
    Publication Date: 2021-03-29
    Description: Paläoseismologische Daten lassen vermuten, dass viele aktive Störungen in unterschiedlichen tektonischen Settings eine Veränderung in der Bewegungsrate auf der Störung kurz nach dem Ende des letzten glazialen Maximums erfahren haben. Als Beispiel seien die postglazial entstandenen oder reaktivierten Pärve Überschiebung oder die Stuoragurra Überschiebung in Nord Skandinavien (Lappland Fault Province), aber auch die über Millionen Jahre aktive Wasatch Abschiebung in der Basin and Range Province oder die Tote Mehr Transform Störung genannt. In dieser Arbeit werden dreidimensionale Finite Elemente Modelle benutzt um den Einfluss von Lastwechseln auf der Erdoberfläche auf das Verhalten einzelner Störungen zu untersuchen. Die Resultate dieser Arbeit zeigen, dass klimabedingte Volumenänderungen von Gletschern und Seen auf der Erdoberfläche das Spannungsfeld der Kruste beeinflussen. Generell gilt: Lastzunahme führt zu verringerten, Entlastung zu erhöhten Bewegungsraten auf der Störung.
    Description: thesis
    Keywords: 551 ; 550 ; VAE 130 ; VAE 140 ; TOH 800 ; Paläoerdbeben {Geophysik} ; Geomechanik ; Gesteinsdeformation {Strukturgeologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 94 S.
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  • 47
    Publication Date: 2021-03-29
    Description: This study focuses on the interactions between climate and ice sheets in order to obtain a better understanding of the processes involved. Two periods in the geological past are explored; the Middle Miocene and the mid-Pliocene. For both periods, foraminiferal oxygen-isotope records from deep-sea sediment cores as well as stratigraphical data, suggest a global sea-level lowering. The magnitude of these reductions in sea level indicate large-scale ice-sheet build-up. However, the origin of these events and even the geographic locations of the ice sheets, are still under discussion. The ice sheet-climate model developed in this study provides a tool to test some of the hypotheses brought forward to explain the ice-sheet expansion events. It describes the Antarctic ice sheet and is forced by a climate component based on energy and mass balances. Further more, the model computes the oxygen-isotopic composition of the ice-sheet, thereby providing the possibility to compare numerical results directly to deep-sea sediment records. Numerical experiments focus on the interactions between atmospheric CO2, temperature, ice volume (sea-level equivalent) and the isotopic composition of sea water...
    Description: thesis
    Keywords: 551.69 ; 551 ; 550 ; TWC 600 ; VAR 980 ; Paläoklimatologie ; Antarktis {Glazialgeologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 137 S.
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  • 48
    Publication Date: 2021-03-29
    Description: The Late BarremianLate Aptian interval was characterised by several major changes in the ocean/climate system related to the onset of the Mid-Cretaceous greenhouse world. North Africansedimentary deposits offer excellent archives of the ecological changes on the southern Tethyscontinental margin during this time interval. In the present phD thesis sedimentology, palaeontology,biostratigraphy, chemostratigraphy, and geochemistry are combined to reconstruct the palaeoenvironmental evolution and sea-level changes of the Tunisian carbonate platform margin.Respect is paid to major palaeoceanographic and palaeoclimatic events including the late Early Aptian Oceanic Anoxic Event 1a (OAE 1a) and two time intervals associated with widespread carbonate platform drowning in the early- and mid-Late Aptian. The last chapter deals with the cephalopod fauna of the platform margin. Results of the detailed regional investigations are compared to global marine palaeoenvironments and discussed in a broad geological context...
    Description: thesis
    Keywords: 551.77 ; 551 ; 550 ; TWC 600 ; VKB 372 ; VEN 130 ; VDH 300 ; Paläoklimatologie ; Karbonatische Sedimentgesteine ; Tunesien {Geologie} ; Kreide
    Language: English
    Type: monograph , publishedVersion
    Format: 160 S.
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  • 49
    Publication Date: 2021-03-29
    Description: Slope stability, submarine slides, Svalbard, Arctic Ocean, Sophia Basin. - With increasing interest in slope stability issues on continental shelves the causes and trigger mechanism of submarine slides get more and more into the scientific focus. Within the ESF EUROMARGINS project 'Slope Stabilities on Europe's passive continental Margin' (SPACOMA) sediment dynamics of megaslides along the passive continental margin north of Svalbard have been investigated. The study concentrated on identification and sedimentological characterisation of megafailure events, their dating and interpretation in relation to paleoceanography and climate history of the Svalbard archipelago. Integrated interpretation of multibeam bathymetric, sediment-penetrating acoustic (PARASOUND) and seismic data shows a multiple slope failure on the northern European continental margin, north of Spitsbergen. One huge submarine slide has been identified which was first described by Cherkis et al. (1999) - the Yermak Slide (later named Hinlopen/Yermak Megaslide). The extent of the Hinlopen/Yermak Megaslide has been revised based on new acoustic and detailed bathymetric data. Details from the side's internal structure give evidence for one main slide event followed by repeated minor events. The first slide event occurred during MIS 3 around 30 cal. kyr. BP and was characterised by highly dynamic and rapid evacuation of ca. 1.250 kmÃÂđ of sediment from the lower to the upper part of the shelf slope. During this megaslide event, headwalls up to 1600 m have been created and ca. 1150 kmÃÂđ material from hemipelagic sediments and from the lower preexisting trough mouth fan has been entrained and transported into the semi-enclosed Sophia Basin. This megaslide was followed by a secondary evacuation of debris material to the Nansen Basin accomplished by funnelling of the debris through the Littke Channel between Polarstern Seamount and the adjacent continental slope. The main slide debris is overlain by a set of fining-upwards sequences as evidence for the associated suspension cloud and ...
    Description: thesis
    Keywords: 551.307 ; 551.69 ; 551 ; Nordatlantische Polarinseln {Geologie} ; Sedimente bestimmter Regionen ; Sonstige Sedimentationsprozesse ; Paläoklimatologie
    Language: English
    Type: monograph , publishedVersion
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  • 50
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; 550 ; TOD 400 ; TOE 000 ; TSB 000 ; Erdmantel {Geophysik} ; Physikalisches Verhalten der Erde {Geophysik} ; Mitteleuropa {Geophysik}
    Language: English
    Type: monograph , publishedVersion
    Format: 147 S.
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  • 51
    Publication Date: 2021-03-29
    Description: Anhand des Modellfalls der Sesia Zone in den West-Alpen werden mikrostrukturelle Kriterien für syn- und postseismische Deformation in der oberen Plastosphäre in Folge eines großen Erdbebens in der überlagernden Schizosphäre ausgearbeitet. Die Orientierungsverteilung von mechanisch verzwillingten Jadeiten liefert Hinweise auf Spitzten-Spannungen 〉0,5 GPa. Die Vielfalt unterschiedlicher Quarz-Mikrostrukturen spiegelt progressive Deformation bei relaxierenden Spannungen in einem Temperaturbereich von 300-350 ʿC wider. Ein dazu konsistentes Bild liefert die kataklastische Deformation von Granat. Verheilte Mikrorisse in Quarz, verfüllte Risse in Granat sowie mesoskopische, diskordante Quarz-Gänge mit rekristallisierter Füllung geben Hinweise auf einen fluktuierenden Porenfluiddruck. Dieses Beispiel aus der Sesia Zone veranschaulicht die Bedeutung nicht-stationärer Deformation in der oberen Plastosphäre, entgegen konventionellen Vorstellungen von dominierend stationärem Fließen.
    Description: thesis
    Keywords: 551.8 ; 551.1 ; 552.4 ; 551 ; 550 ; VAE 400 ; VAE 811 ; VAE 140 ; VEB 169 ; VAE 400 ; VAE 811 ; VAE 140 ; VEB 169 ; Tektogenese {Geologie} ; Alpidische Orogene {Geologie} ; Gesteinsdeformation {Strukturgeologie} ; Französisch-italienische Westalpen {Geologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 97 S.
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  • 52
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; TSX 500 ; TQC 220 ; VAE 880 ; Chile {Geophysik} ; Reflexionsseismik {Geophysik} ; Passive und aktive Kontinentalränder {Geologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 254 S.
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  • 53
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    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TOD 300 ; TOD 400 ; TOD 500 ; Erdinneres insgesamt {Geophysik} ; Erdmantel {Geophysik} ; Erdkern {Geophysik}
    Language: English
    Type: article , publishedVersion
    Format: 26 S.
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    GFZ, Potsdam
    Publication Date: 2021-03-29
    Description: lecture
    Keywords: 551
    Language: English
    Type: anthology , publishedVersion
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  • 55
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551
    Language: English
    Type: article , publishedVersion
    Format: 30 S.
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  • 56
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551
    Language: English
    Type: article , publishedVersion
    Format: 190 S.
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  • 57
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; VEX 100 ; VAE 811 ; TSX 100 ; TQC 200 ; Anden {Geologie} ; Alpidische Orogene {Geologie} ; Anden {Geophysik} ; Prospektionsseismik {Geophysik}
    Language: English
    Type: monograph , publishedVersion
    Format: 139 S.
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  • 58
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; VAE 120 ; VAE 140 ; VBP 500 ; VBP 200 ; Methodik {Strukturgeologie} ; Gesteinsdeformation {Strukturgeologie} ; Bodenmechanik, Erdbaumechanik, Baugrunddynamik ; Ingenieurgeologische Bewertung von Gesteinen als Baugrund und Baustoff
    Language: English
    Type: monograph , publishedVersion
    Format: 95,S.
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  • 59
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TVI 000 ; Jahreszeiten als meteorologische Erscheinung
    Language: English
    Type: article , publishedVersion
    Format: 16 S.
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  • 60
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TVI 000 ; TM 600 ; Jahreszeiten als meteorologische Erscheinung ; Grenzgebiete. Beziehungen. Einflüsse. Wirkungen {Geophysik}
    Language: English
    Type: article , publishedVersion
    Format: 17 S.
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  • 61
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TOB 100 ; Drehbewegungen {Geophysik: Erde}
    Language: English
    Type: article , publishedVersion
    Format: 43 S.
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    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; VAE 300 ; TQI 000 ; UNH 100 ; Epirogenese {{Geologie}} ; Geophysikalische Satellitenfernerkundung ; GPS {Praktische Geodäsie}
    Language: English
    Type: article , publishedVersion
    Format: 106 S.
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  • 63
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; VBN 500 ; VAE 811 ; VEB 168 ; VEX 100 ; VEX 500 ; TSX 500 ; TSB 168 ; VKB 270 ; VAE 880 ; Geochronologie einzelner Regionen im allgemeinen ; Alpidische Orogene {Geologie} ; Schweizer Alpen {Geologie} ; Anden {Geologie} ; Chile {Geologie} ; Chile {Geophysik} ; Schweizer Alpen {Geophysik} ; Produkte mechanischer Deformation {Petrologie} ; Passive und aktive Kontinentalränder {Geologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 179 S.
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    GFZ, Potsdam | [Bibliothek des Wiss.-Parks Albert Einstein] [Vertrieb], [Potsdam]
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551
    Language: English
    Type: monograph , publishedVersion
    Format: 156 S.
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    GFZ, Helmholtz-Zentrum | [Bibliothek des Wissenschaftsparks Albert Einstein] [Vertrieb], [Potsdam]
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; TOD 200 ; TOD 410 ; TSB 000 ; VAE 812 ; VEB 130 ; TOH 100 ; Erdkruste {Geophysik} ; Oberer Erdmantel {Geophysik} ; Mitteleuropa {Geophysik} ; Variszisch-herzynische Orogene {Geologie} ; Böhmische Masse {Geologie} ; Seismometrie {Geophysik}
    Language: English
    Type: monograph , publishedVersion
    Format: 149 S.
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  • 66
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    GFZ, Helmholtz-Zentrum | [Bibliothek des Wissenschaftsparks Albert Einstein] [Vertrieb], [Potsdam]
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551
    Language: English
    Type: article , publishedVersion
    Format: 12 S.
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    GFZ, Helmholtz-Zentrum | [Bibliothek des Wissenschaftsparks Albert Einstein] [Vertrieb], [Potsdam]
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; VAE 500 ; VBB 000 ; VAJ 400 ; Geotektonische Entwicklung der Erdkruste {Geologie} ; Experimentelle Geologie ; Abtragung durch Erosion {Geologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 141 S.
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  • 68
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    GFZ, Helmholtz-Zentrum | [Bibliothek des Wissenschaftsparks Albert Einstein], Potsdam
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TOH 530 ; TST 000 ; VET 600 ; Häufigkeit und Verbreitung von Erdbeben {Geophysik} ; Ozeanien {Geophysik} ; Sonstige Inselgruppen {Geologie}
    Language: English
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  • 69
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    GFZ, Helmholtz-Zentrum | [Bibliothek des Wissenschaftsparks Albert Einstein] [Vertrieb], [Potsdam]
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 511.8 ; 551 ; TOO 000 ; VAQ 400 ; Geothermik {Geophysik} ; Morphologie, Ausmaß und Dicke, Masse und Energiegleichgewicht {Glaziologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 106 S.
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  • 70
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    GFZ, Helmholtz-Zentrum | [Bibliothek des Wissenschaftsparks Albert Einstein] [Vertrieb], Potsdam
    Publication Date: 2021-03-29
    Description: report
    Keywords: 511.8 ; 551
    Language: English
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  • 71
    Publication Date: 2021-03-29
    Description: The main objective of this thesis is an investigation and description of the secular variation of the Earth's magnetic field between 1980 and 2000. In particular, in the first part of this study the phenomenon of geomagnetic jerks are investigated by means of a deterministic model, which basically gives a description of the secular variation as a parameterization of typical periodicities of the external field. I argue that the conclusion drawn from this approach is not valid for explaining jerks as caused by external events and not valid to describe the global secular variation. In the second part a time--dependent model of the secular variation between 1980 and 2000 is developed. The endpoints of the time interval were chosen, because of the availability of high quality field models from satellite data for these epochs. The Gauss coefficients are expanded in time as function of cubic B--splines. This model is forced to fit field models from high quality vector measurements from MAGSAT in 1980 and OERSTED in 2000. The methodology is new. The model is a valuable extension of the hitherto existing time--dependent description of the secular variation, the GUFM which was valid until 1990. Unlike GUFM the model is based on observatory monthly means, and the knot spacing of the cubic B--Splines tighter than GUFM. Therefore it reveals a short term secular variation on subdecadal time scale, which was not as yet resolved. The model is also valuable to test the frozen flux hypothesis and to link some of the morphology of the radial field at the core--mantle boundary to the geodynamo. The third part of this thesis deals with the inversion of the time--dependent field and secular variation model for different kinds of core surface flow ...
    Description: thesis
    Keywords: 551 ; TOT 500 ; TOD 500 ; Ursprung und säkulare Änderungen des Erdmagnetfeldes {Geophysik} ; Erdkern {Geophysik}
    Language: English
    Type: monograph , publishedVersion
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  • 72
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    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TM 300 ; Methodik. Arbeitsmittel. Abkürzungsverzeichnisse {Geophysik}
    Language: English
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  • 73
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TOB 000 ; TOT 500 ; Periodische Bewegungen der Erde {Geophysik} ; Ursprung und säkulare Änderungen des Erdmagnetfeldes {Geophysik}
    Language: English
    Type: article , publishedVersion
    Format: 41 S.
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  • 74
    Publication Date: 2021-03-29
    Description: For deep underground excavations, the prediction of locations of small-scale geotechnical hazardous structures such as faults is nearly impossible when exploration is restricted to surface based methods. Therefore, for many base tunnels, exploration ahead of the advancing tunnel face is an essential component of the excavation plan. This PhD thesis aims at improving the technology for geological interpretations of seismic data, collected in underground excavations. For that purpose GeoForschungsZentrum Potsdam carried out a series of seismic measurements along the 2600 m long and up to 1400 m deep Faido access tunnel, an adit to the 57 km long Gotthard base tunnel in Switzerland.
    Description: thesis
    Keywords: 551 ; TQC 500 ; VBP 400 ; VBP 100 ; Untertageseismik {Geophysik} ; Felsmechanik, Gebirgsmechanik, Gebirgsdruck ; Methodik, Untersuchungsverfahren und Instrumente {Ingenieurgeologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 127 S.
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  • 75
    Publication Date: 2021-03-29
    Description: Present-day sea-level change around Greenland is examined by assessing the roleplayed by glacial-isostatic adjustment (GIA). We consider the contributions from: (1) the ongoing GIA due to changes in the extent and thickness of the Greenland Ice Sheet (GIS) following the Last Glacial Maximum (LGM), (2) the equivalent signal associated with the continental ice masses located outside of Greenland, and (3) present-day changes in the GIS. Changes in the GIS arising from the last glacial-interglacial transition generally result in falling sea level today. The contribution from ice-load changes outside of Greenland causes rising sea level, owing to Greenland's location on the collapsing forebulge that surrounds the former North American ice sheets. Combining predictions of these contributions gives results showing rising sea level in the southwest and falling sea level in the north and east. However, this is strongly dependent upon the neoglacial part of the GIS's history. The present-day behaviour of the GIS is predicted to cause falling sea level with rates of several mm yr?1 around areas experiencing the larger ice-load changes. The available tide-gauge data are considered unusable by the standards of many workers. Nevertheless, we compare rates of local sea-level change inferred from this type of data with our predictions. In Southern Greenland, where the tide-gauge stations are located, sea level is predicted to be rising at a rate of 4 to 5 mm yr?1. Our predictions match most of the rates obtained from the tide-gauge time series, with the exception of Qaqortoq where the inferred rates may also reect additional oceanic and meteorological effects. Similarly, our predictions are consistent with GPS observations, with again the exception of Qaqortoq.
    Description: report
    Keywords: 551 ; TOG 000 ; VSY 000 ; Isostasie {Geophysik} ; Polargebiete {Fossile Energieträger}
    Language: English
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  • 76
    Publication Date: 2021-03-29
    Description: We review the historical, geological, tide-gauge, GPS and gravimetric evidence advanced in favour of or against continuing land uplift around Hudson Bay, Canada. After this, we reanalyse the tide-gauge and GPS data for Churchill using longer time series than those available to previous investigators. The dependence of the mean rate of relative sea-level change obtained on the length and mid-epoch of the observation interval considered is investigated by means of the newly developed linear-trend analysis diagram. For studying the shorter-period variability of the tide-gauge record, the continuous-wavelet transform is used. The mean rate of land uplift obtained from GPS is based on a new analysis using IGS solutions of GFZ. Furthermore, sea-level indicators from the Churchill region representing the relative sea-level history during the past 8000 a are included. Finally, the four types of observable are jointly inverted in terms of mantle viscosity. The optimum values are 3×10^20 Pa s and 1.6 × 10^22 Pa s for the upper- and lower-mantle viscosities, respectively.
    Description: report
    Keywords: 551
    Language: English
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  • 77
    Publication Date: 2021-03-29
    Description: Recently released global gravity field models generated solely from CHAMP and GRACE satellite observations allow with an unprecedented accuracy and resolution the recovery of the mean sea surface topography from the difference between an altimetry-based mean sea surface height model and the gravity model's derived geoid. Here the CHAMP EIGEN-2 gravity field model, and the first GFZ GRACE gravity model, EIGEN-GRACE01S, are used. The mean sea surface height model has been compiled from four years'; worth of TOPEX altimeter data. To evaluate the accuracy and resolution limits of the CHAMP and GRACE geoids for the envisaged application, a low pass filter in the spatial domain with different cut-off wavelengths has been applied to the geoid and sea surface data before subtraction. The minimum wavelength, where noisy and erroneous features in the recovered sea surface topography are minimised, can be interpreted as an indicator for the best suited common spatial resolution. The EIGEN-2 model's geoid has been tested to have a resolution of 1800 km, which corresponds to a truncation degree of l = 22 in terms of spherical harmonics. Using the EIGEN-GRACE01S model, the resolution could be extended to 1000 km (l = 40). These boundaries can be attributed to the geoid's error, exceeding 2 cm in case of the CHAMP model, and in case of the GRACE model to spurious systematic signals increasing with increasing spherical harmonic degree. The calculated sea surface topography models have been used to derive absolute geostrophic sea surface velocities. An error propagation shows that the requirement of 1 cm/s for geoid induced velocity errors is fulfilled at the given resolutions for all latitudes excluding a narrow equatorial band. Maximum geostrophic velocities are derived in the 1000 km-resolution model for the Kuroshio region with 40 cm/s, and for the Gulf Stream east off Cape Hatteras with 25 cm/s.
    Description: report
    Keywords: 551 ; TQI 000 ; Geophysikalische Satellitenfernerkundung
    Language: English
    Type: article , publishedVersion
    Format: 22 S.
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    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TOF 000 ; Schwerkraft {Geophysik}
    Language: English
    Type: article , publishedVersion
    Format: 17 S.
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    Publication Date: 2021-03-29
    Description: report
    Keywords: 551
    Language: English
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  • 80
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551.4 ; 551 ; 550 ; VAT 300 ; VEZ 300 ; TSZ 300 ; Geologie des Meeresboden ; Pazifischer Ozean {Geologie} ; Pazifischer Ozean {Geophysik}
    Language: English
    Type: article , publishedVersion
    Format: 190 S.
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    Publication Date: 2021-03-29
    Description: This report describes the set-up, logistics and results of the CHICAGO (Chilean Coastal AeroGeophysical Observations) survey. It gives a short overview about the scientific intentions, detailed documentation of all technical aspects starting from the survey equipment via the aircraft installation to the GPS stations set-up and the experiences in flight. All processing results for the individual profiles are discussed in detail. Finally, the data is compared and combined with available recent marine gravity data and altimetry derived solutions.
    Description: report
    Keywords: 551 ; TQH 000 ; TSX 500 ; Aerogeophysik ; Chile {Geophysik}
    Language: English
    Type: article , publishedVersion
    Format: 100 S.
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  • 82
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TOB 300 ; Polbewegungen {Geophysik: Erde}
    Language: English
    Type: article , publishedVersion
    Format: 33 S.
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  • 83
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; TOB 300 ; VBF 000 ; Polbewegungen {Geophysik: Erde} ; Elektronische Datenverarbeitung in der Geologie
    Language: English
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  • 84
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; VAE 400 ; VEX 500 ; UNF 000 ; Tektogenese {Geologie} ; Chile {Geologie} ; Satellitengeodäsie
    Language: English
    Type: monograph , publishedVersion
    Format: 127 S.
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    GFZ, Helmholtz-Zentrum
    Publication Date: 2021-03-29
    Description: The LaCoste & Romberg gravity meter S124b and its associated system environment were installed and tested in conjunction with a strap-down gravity meter system (SAGS) of the Bayerische Akademie der Wissenschaften in Munich on a Cessna Grand Caravan of the DLR in Oberpfaffenhofen. This report describes the design and instrumentation of the aerogravimetry system, it documents the installation on the aircraft and it discusses some of the results of the test flights performed within AGFA (Airborne Gravity Flight Approach). Beyond the documentation of the system this report gives a short introduction to the basics of the instruments including a short theory of their operation and data processing. The intention is to give readers from disciplines other than aero-gravimetry and aero-altimetry a technical insight into how the system works and what it is capable of. This should help the reader to evaluate the systems usefulness in other geo-scientific projects. The experiences from the test flights are briefly summarized and an update of the current status and future plans for the individual instruments is given. The aerogravimetry system consists of two major instrument blocks: the gravimetry sensing system and the positioning system. The gravimetry sensors are the LaCoste & Romberg S124b and the SAGS-2.2 systems. The navigation block holds GPS receivers, an inertial navigation system and a laser altimeter. The aircraft used for the primary tests was a Cessna Grand Caravan of the DLR in Oberpfaffenhofen. It offers superb conditions for scientific installations and is widely used in geophysical exploration all over the world. The test flights were flown from Oberpfaffenhofen airport. One profile covers the Bavarian Alps to map short wavelength, topography induced gravity disturbances, and another flight crosses the Rhine Graben to map long wavelength structures of the deeper crust. The software for data processing for navigation, gravimetry and geoid calculations is briefly summarized.
    Description: report
    Keywords: 551 ; TQH 000 ; Aerogeophysik
    Language: English
    Type: article , publishedVersion
    Format: 74 S.
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  • 86
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    Department of Water, Land and Biodiversity Conservation, Adelaide, SA
    Publication Date: 2021-03-29
    Description: The Barossa Basin is a complex hydrogeological environment containing a sedimentary aquifer system surrounded and underlain by a dual porosity fractured rock aquifer. The hydraulic relationship between the fractured rock aquifer and the sedimentary aquifers is poorly understood. The difficulties in describing the movement of groundwater through dual porosity media such as a fractured rock aquifer are well documented. While groundwater flow in the sedimentary aquifers can be adequately described using porous media flow techniques in the Barossa Basin, our understanding of interconnectivity between individual sedimentary aquifers is again poor. The Basin itself is narrow and, immediately adjacent to the Stockwell Fault on the eastern side of the valley, relatively deep (~200 m). Sediments deposited into the trough consisted of mainly discontinuous sequences of overlapping sands and carbonaceous clays. This was followed by the deposition of gravels, sands and clays that form the Barossa Valley as it is today. Various authors have sub-divided the geology into individual hydrostratigraphical units. However, a review of the literature highlighted inconsistencies in the number of aquifers recognised, their exact spatial distribution within the Basin, and that there have been changes in nomenclature that are not satisfactorily described. This has resulted in some confusion that requires clarification ...
    Description: report
    Keywords: 551 ; UDY 000 ; URY 250 ; UQK 400 ; VBQ 900 ; VES 500 ; Australien und Ozeanien {Hydrologie} ; Karten: South Australia ; Karten zur Hydrogeologie ; Hydrogeologie einzelner Regionen ; South Australia {Geologie}
    Language: English
    Type: article , publishedVersion
    Format: 90 S.
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  • 87
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; VEZ 110 ; VAT 300 ; Teilgebiete {Geologie} ; Geologie des Meeresboden
    Language: English
    Type: article , publishedVersion
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  • 88
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    IFM-GEOMAR, Kiel
    Publication Date: 2021-03-29
    Description: report
    Keywords: 551 ; VTZ 000 ; VAT 300 ; Submarine Lagerstätten {Rohstoffgeologie} ; Geologie des Meeresboden
    Language: English
    Type: article , publishedVersion
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  • 89
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    IFM-GEOMAR, Kiel
    Publication Date: 2021-03-29
    Description: excursionguide
    Keywords: 551 ; UKA 110 ; VEZ 110 ; VAT 300 ; Expeditionsberichte {Regionale Ozeanologie, Atlantik} ; Teilgebiete {Geologie} ; Geologie des Meeresboden
    Language: English
    Type: article , publishedVersion
    Format: 64 S.
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  • 90
    Publication Date: 2021-04-25
    Description: research
    Keywords: 551 ; VU 000 ; Geobiologie
    Language: English
    Type: anthologyArticle , publishedVersion
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  • 91
    Publication Date: 2021-04-27
    Description: research
    Keywords: 551 ; VU 000 ; Geobiologie
    Language: English
    Type: anthologyArticle , publishedVersion
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  • 92
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    Univ. Köln
    Publication Date: 2021-03-29
    Description: Während der Kreide wurden zahlreiche Störungen des globalen Kohlenstoffkreislaufes aufgezeichnet. Diese Störungen führten zu organisch reichen Ablagerungen, den sogenannten ozeanischen anoxischen Ereignissen (OAEs). Der OAE 1b, abgelagert in der Unteren Kreide, ist einer dieser bedeutenden CO2- Störungen und wird mit der Sedimentation von Schwarzschiefern in Verbindung gebracht. Beschrieben wurde OAE 1b in Ablagerungen des Unteren Albs für die Regionen des Nord- und Zentral Atlantiks sowie im westlichen Einzugsbereich der Tethys und wird deshalb als überregionaler Schwarzschiefer beschrieben. OAE 1b ist assoziiert mit einer abrupten Verschiebung zu ausgeprägt negativen Werten innerhalb zahlreicher Kohlenstoffisotopenreservoirs. Negative Piks in den Kohlenstoffisotopen wurden ebenfalls für das OAE im Toarcium und das OAE 1a im Frühen Apt beschrieben und werden in Zusammenhang mit spontaner Freisetzung von Methan aus marinen Gashydraten gebracht. In dieser hier präsentierten Studie wurden hochauflösende geochemische Profile von zwei paläogeographisch getrennten und klimatisch differenzierten Gebieten (Mazagan Plateau DSDP Site 545 und dem Vokontischen Becken) erstellt. Der Beginn der Sedimentation und der Abschluss fallen zeitgleich mit den negativen Isotopen Piks für beide Untersuchungsgebiete einher. Auffallend ist ein plötzlicher Anstieg der Meeresoberflächentemperatur um 3 ʿC, gemessen an der tropisch gelegenen Site 545 mit dem TEX86 Temperaturproxie, zeitgleich mit dem negativen Piks in den Kohlenstoffisotopen zu Beginn des OAE 1b ...
    Description: Zsfassung in dt. und engl. Sprache
    Description: thesis
    Keywords: 551 ; VJI 000 ; VDH 310 ; VJB 313 ; VKB 380 ; Geochemische Kreislaufmodelle ; Unterkreide ; Geochemie der Sedimente ; Sedimente bestimmter Regionen
    Language: English
    Type: monograph , publishedVersion
    Format: 135 S.
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  • 93
    Publication Date: 2021-03-29
    Description: Zsfassung in dt. Sprache
    Description: Die supergene nicht-sulfidische Zink-Lagerstätte Skorpion befindet sich in der südlichen Namib-Wüste, Namibia, ungefähr 40 km nördlich des Orange Rivers. Die Lagerstätte umfasst bei einem Durchschnittsgehalt von 10,6 % Zink 24,6 Millionen Tonnen nicht-sulfidische Vererzung. Im Liegenden des nicht-sulfidischen Erzkörper treten hypogene Buntmetall-Sulfide aus. Die Oxidation des sulfidischen Buntmetall-Protors führte zur Entstehung des supergenen nicht-sulfidischen Erzkörpers durch Nebengesteinsverdrängung sowie in-situ Oxidation. Die nicht-sulfidischen zinkhaltigen Minerale bestehen hauptsächlich aus Saukonit (Zn-Smektit), Hemimorphit und Smithsonit. Darüberhinaus treten Hydrozinkit, Tarbuttit und Chalkophanit auf. Diese formen isomorphe und hypisomorphe Kristalle und füllen inter- und intragranulare Porenräume und Klüfte. Die Wirtsgesteine der Skorpion-Lagerstätte bestehen vorrangig aus spätproterozoischen Meta-arkosen und -subarkosen. Untergeordnet treten felsische Metavulkanite und deren vulkaniklastische Equivalente auf.
    Description: thesis
    Keywords: 551 ; VRA 320 ; VTR 200 ; VRA 320 ; VTR 200 ; Blei- und Zinkerze ; Namibia {Rohstoffgeologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 252 S.
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  • 94
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    Univ. Potsdam
    Publication Date: 2021-03-29
    Description: Der Aralsee ist ein intrakontinental gelegenes endorheisches Gewässer fernab von ozeanischen Einflüssen, welches ein exzellentes sedimentäres Archiv für hochauflösende Paläoklimastudien in Zentralasien darstellt. In der vorliegenden Studie wurden umfangreiche palynologische, mikrofazielle und geochemische Analysen anhand von mehreren Bohrkernen aus der Chernyshov-Bucht im NW des heutigen Großen Aralsees durchgeführt. Die vollständigste der erbohrten Sequenzen weist dabei eine Länge von 11 m auf und beinhaltet näherungsweise die letzten 2000 Jahre des Holozän. 〈br〉〈br〉 Die hochauflösenden palynologischen Analysen der Studie, welche sowohl die Untersuchung von Dinoflagellatenzysten als auch Pollen beinhaltet, zeugen von einschneidenden Umweltveränderungen im Aralsee und seinem Einzugsgebiet. Die Untersuchung von Diversität und räumlicher Verbreitung der fossilen Dinoflagellatenzysten vermittelt dabei ein genaues Bild von den Salinitäts- und Seespiegeländerungen der letzten 2000 Jahre. Aufgrund der weitgehenden Abhängigkeit der hydrologischen Verhältnisse des Aralsees von der Wasserführung seinen tributären Flüsse, hängt sein Seespiegel unmittelbar von den Schmelzwasserzuflüssen im Frühjahr ab. Da der Schmelzwasserzufluss seinerseits mit den Temperaturveränderungen im Tien Shan und Pamir während der Schneeschmelze in Verbindung steht, spiegeln die Paläo-Salinität und der Paläo-Seespiegel des Aralsees folglich die Temperaturveränderungen im hochgelegenen Einzugsgebiet des Aralsees wider...
    Description: thesis
    Keywords: 551 ; VKB 380 ; VDI 220 ; TWC 500 ; Sedimente bestimmter Regionen ; Holozän ; Klimaschwankungen und Klimaänderungen im Quartär
    Language: English
    Type: monograph , publishedVersion
    Format: 138 S.
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  • 95
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; VBP 800 ; Ingenieurgeologie bei der unterirdischen Speicherung und Lagerung
    Language: English
    Type: monograph , publishedVersion
    Format: 210 S.
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  • 96
    Publication Date: 2021-03-29
    Description: Carbon, Upwelling, Namibia, shelf, sediments. - This PhD thesis is an essential component of the 'Namibia Gas' (NAMIBGAS) project, which aims to improve the understanding of the rate and fluxes of hydrogen sulfide and methane to the sediment surface and into the water column on the Namibian shelf, which is one of the most productive upwelling systems on Earth. Organic matter degradation in the sediment drives hydrogen sulfide production, the maintenance of anoxia, and methane formation. Therefore, the primary aims of the thesis are to study carbon transformation processes within the sediment, determine the reactivity of organic carbon in the sediment and, investigate the control of microbial community structure and activity by the amount and accessibility of carbon sources. The emphasis is on linking microbial community structure (identity) to their function (activity) to provide new insights into the microbial ecology that controls carbon turnover in these upwelling sediments. By studying the stepwise degradation of organic carbon a complete process overview of organic carbon mineralization could be obtained. Firstly, the diagenetic transformation of dissolved organic carbon (DOC), in particular dissolved carbohydrates, was studied by using both biogeochemical methods and molecular techniques. The bulk sediment composition, pore water chemistry, polysaccharide hydrolysis rates, 35S-sulfate reduction rates, and the abundance of active bacteria involved in the initial and terminal processes of organic carbon degradation within the top 15 cm of the sediment from two sampling stations were determined (Chapter 2). Secondly, the diversity of bacteria from the same ...
    Description: thesis
    Keywords: 551 ; VAT 270 ; VGE 500 ; Flachsee-Sedimente {Geologie} ; Biomineralisation
    Language: English
    Type: monograph , publishedVersion
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  • 97
    Publication Date: 2021-03-29
    Description: Soil and groundwater pollution has become a global issue since the advent of industrialization and mechanized agriculture. Some contaminants such as PAHs may persist in the subsurface for decades and centuries. In a bid to address these issues, protection of groundwater must be based on the quantification of potential threats to pollution at the subsurface which is often inaccessible. Risk assessment of groundwater pollution may however be strongly supported by applying process-based simulation models, which turn out to be particularly helpful with regard to long-term predictions, which cannot be undertaken by experiments. Such reliable predictions, however, can only be achieved if the used modeling tool is known to be applicable...
    Description: thesis
    Keywords: 628.161 ; 551 ; VJF 000 ; Umweltgeochemie insgesamt
    Language: English
    Type: monograph , publishedVersion
    Format: 176 S.
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  • 98
    Publication Date: 2021-03-29
    Description: The main objective of this thesis is the quantitative investigation of groundwater salinisation induced by solute recycling from irrigation, and its implications for the overall salinisation in coastal settings. Since the modelling approaches proposed in literature to simulate seawater-intruded areas rarely account for the coupled and superimposed effects of solute recycling and seawater intrusion, simulation procedures have been developed, to evaluate the impact of salinisation induced by ...
    Description: thesis
    Keywords: 551 ; VBQ 400 ; VBQ 900 ; VBQ 400 ; VBQ 900 ; Grundwassergefährdung {Hydrogeologie} ; Hydrogeologie einzelner Regionen
    Language: English
    Type: monograph , publishedVersion
    Format: 207 S.
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  • 99
    Publication Date: 2021-03-29
    Description: The thesis contains 6 chapter and mentions about the influences of sea level change, climate, tectonic into the sedimentary process. The results show that late Pleistocene facies mostly are weathered facies which content gibbsite-kaolinite, limonite. In transgression, facies assemblage includes lagoon, tidal and estuary. The composition are in-situ reworked minerals like illite, gypsum. In regression, facies are shallow marine, prodelta, delta front, distributary lobe, swamp, tidal and beach, channel infill, flood plain, lake. Abundant minerals are named like smectite, illite, chlorite, quartz, feldspar, rock fragments, gypsum.Gypsum is the evaporited mineral easily to be formed in coastal environment of Red River Delta. It is a good indicative mineral for distinguishing the deposits formed in dry season of monsoon regions. Smectite is good indicative mineral for sea environment which mostly related with the transference and low accumulation and new formed in climate with wet and dry periods. Kaolinite-gibbsite is an indicator of strong chemical weathering with high precipitation. The stratigraphy can be divide into trangressive systems tract (10-8.5 cal. kyr BP) and highstand systems tract with aggradational-progradational parasequence set (8.5-6.5 cal. kyr BP) and progradational parasequence set (6.5 cal. kyr BP-today, with subsets 6.5-4.0; 4.0-1.5; and 1.5-0.0 cal. kyr BP). The subsidence process which reflex in accumulation rate regarded to not only sea level change, tectonics but also human impact - dyke build plays the main role to increased sedimentary thickness...
    Description: Nordvietnam, Holocene sediment, Red River Delta, sea level change
    Description: thesis
    Keywords: 551 ; VEJ 240 ; VDI 220 ; VAT 260 ; VKB 380 ; Malaiische Halbinsel {Geologie} ; Holozän ; Ästuarsedimente {Geologie} ; Sedimente bestimmter Regionen
    Language: English
    Type: monograph , publishedVersion
    Format: 121 S.
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  • 100
    Publication Date: 2021-03-29
    Description: Volcanology, volcanic rift zones, Madeira, fluid inclusions, thermobarometry, geochemistry, geochronology. - Madeira and the Desertas Islands show two well-developed volcanic rift zones which intersect near the eastern tip of Madeira (São Lourenço peninsula). To examine a possible genetic link, volcanic structures, rock ages and rock compositions were investigated at the Desertas and São Lourenço. Barometric data derived from fluid inclusions and clinopyroxene-melt compositions indicate fractionation at multiple levels within the mantle beneath the rift zones, followed by temporary magma stagnation within the crust. Depths of crustal stagnation beneath São Lourenço and the Desertas differ significantly, and there is no evidence for a shallow magma reservoir feeding both rifts. This suggests that Madeira and the Desertas have separated magma supply systems. 40Ar/39Ar age determinations revealed that Desertas volcanism lasted from 〉5.1 to 1.9 Ma overlapping in age with the shield phase of Madeira. Eruptive quiescence between 4 and 2.5 Ma at São Lourenço coincides with the main period of volcanism on the Desertas. Major and trace elements and ...
    Description: thesis
    Keywords: 551 ; VAD 600 ; VAD 700 ; VAE 840 ; VEF 139 ; Paläovulkanismus {Geologie} ; Regionaler Vulkanismus {Geologie} ; Rifts {Geologie} ; Balearen un Pityusen {Geologie}
    Language: English
    Type: monograph , publishedVersion
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