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  • 1
    Online Resource
    Online Resource
    Cham :Springer International Publishing :
    Keywords: Earth sciences. ; Geology. ; Geochemistry. ; Earth Sciences. ; Geology. ; Geochemistry.
    Description / Table of Contents: The World Hidden Beneath Us - Structure and Composition of the Earth -- Air, Water, Earth - The Exogenic Geological Processes -- Fire - How Magmatism Shaped the Earth -- Geomagnetism - The Space Shield of the Planet Earth -- Seismicity - The Breath of a Restless Earth -- Plate Tectonics - The Great Unifying Theory -- Geochemical Cycles - The Circulatory System of Planet Earth -- The Geochemical Cycles and the Environment - How Man is Changing the Earth -- From Hadean to Anthropocene - The Endless Story of a Lucky Planet -- Epilogue.
    Abstract: The book describes the structure, composition and evolution of the Earth, the main geological processes occurring on it, and how some crucial environmental matters that are amply debated in the media (e.g. pollution, greenhouse effect) can be fully understood by placing them in the holistic context of the system Earth as a whole. It provides basic information on a series of key geological issues, from the structure and composition of the Earth to the large-scale processes that characterize our planet, such as rock alteration and sedimentation, magmatism, geomagnetism, seismicity, plate tectonics, cyclical migration of chemical elements through various Earth reservoirs (Geochemical Cycles), and evolution of the planet from Hadean to present. It intends to reach a wide readership, which is interested in our planet and wish to have a general and comprehensive view of its origin, evolution and activity. Potential readership includes undergraduate and advanced undergraduate students in Geology and other scientific disciplines, and any moderately- to well-educated people interested in the surrounding world and eager to gain a basic knowledge of the Earth and to reach an integrated view of how our planet is working. Includes debated issues of the environmental changes by framing them within the evolution and history of the Earth.
    Type of Medium: Online Resource
    Pages: XV, 223 p. 59 illus., 58 illus. in color. , online resource.
    Edition: 1st ed. 2021.
    ISBN: 9783030780135
    DDC: 550
    Language: English
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  • 2
    facet.materialart.12
    Cham : Springer
    Call number: 9783030780135 (e-book)
    Description / Table of Contents: The book describes the structure, composition and evolution of the Earth, the main geological processes occurring on it, and how some crucial environmental matters that are amply debated in the media (e.g. pollution, greenhouse effect) can be fully understood by placing them in the holistic context of the system Earth as a whole. It provides basic information on a series of key geological issues, from the structure and composition of the Earth to the large-scale processes that characterize our planet, such as rock alteration and sedimentation, magmatism, geomagnetism, seismicity, plate tectonics, cyclical migration of chemical elements through various Earth reservoirs (Geochemical Cycles), and evolution of the planet from Hadean to present. It intends to reach a wide readership, which is interested in our planet and wish to have a general and comprehensive view of its origin, evolution and activity. Potential readership includes undergraduate and advanced undergraduate students in Geology and other scientific disciplines, and any moderately- to well-educated people interested in the surrounding world and eager to gain a basic knowledge of the Earth and to reach an integrated view of how our planet is working. Includes debated issues of the environmental changes by framing them within the evolution and history of the Earth.
    Type of Medium: 12
    Pages: 1 Online-Ressource (xv, 223 Seiten) , Illustrationen
    Edition: 2021, corrected publication 2022
    ISBN: 9783030780135 , 978-3-030-78013-5
    Uniform Title: Aria, Acqua, Terra, Fuoco Come funziona il sistema Terra
    Language: English
    Note: Contents 1 The World Hidden Beneath Us - Structure and Composition of the Earth 1.1 Introduction 1.2 Xenoliths, Meteorites, Earthquakes: Witnesses of the Underground World 1.3 The Structure and Composition of the Earth 1.3.1 The Compositional Layering: Core, Mantle, and Crust 1.3.2 The Mechanical Layering: Inner Core, Outer Core, Convective Mantle, and Lithosphere 1.4 Summary 1.5 Box 1.1 - Minerals and Rocks References 2 Air, Water, Earth - The Exogenic Geological Processes 2.1 Introduction 2.2 Rocks and Soils 2.3 The Atmosphere 2.4 The Hydrosphere 2.5 The Sedimentary Cycle: Air, Water and Earth at Work 2.5.1 Rocks Breakdown 2.5.2 Removal and Transportation of Weathering Products 2.5.3 Sediment Deposition 2.5.4 Diagenesis: Back to Rocks 2.6 The Remains of Mountains 2.7 The Fate of the Organic Matter 2.8 Summary 2.9 Box 2.1 - Water-Air-Earth Interaction: Some Basic Geochemistry 2.10 Box 2.2 - Limestone, a Most Meritorious Rock References 3 Fire - How Magmatism Shaped the Earth 3.1 Introduction 3.2 Magmas: What They Are, How They Form 3.3 Magmatism and the Structure of the Earth 3.3.1 From Chaos to Order 3.4 Volcanism 3.4.1 Types of Volcanic Eruptions 3.4.2 Volcanism and the Terrestrial Environment 3.4.3 Large Igneous Provinces and Mass Extinctions 3.5 Global Distribution of Magmatism 3.6 Summary 3.7 Box 3.1 - Magmatism: How and Why 3.7.1 Main Types of Magma 3.7.2 Ascent, Diversification and Solidification of Magmas 3.8 Box 3.2 - Heat Flow and Geothermal Energy 3.9 Box 3.3 - Magmatism and Ore Deposits References 4 Geomagnetism - The Space Shield of the Planet Earth 4.1 Introduction 4.2 The Earth’s Magnetic Field 4.3 Palaeomagnetism: The Magnetic Memory of Rocks 4.3.1 Magnetic Reversal 4.4 Palaeomagnetism, Continental Drift, and Ocean Floor Spreading 4.5 Summary 4.6 Box 4.1 - Geomagnetism: A Historical Perspective 4.7 Box 4.2 - Geomagnetism and the Biosphere References 5 Seismicity—The Breath of a Restless Earth 5.1 Introduction 5.2 Rock Failure, Earthquakes, and Faults 5.2.1 Stress and Rock Deformation 5.2.2 Earthquakes and Faults 5.3 Seismic Waves 5.4 Seismographs and Seismograms 5.5 Earthquake Magnitude, Intensity and Frequency 5.6 Global Distribution of Earthquakes 5.7 Summary 5.8 Box 5.1- Earthquake Effects, Prediction, Forecasting, and Mitigation References 6 Plate Tectonics - The Great Unifying Theory 6.1 Introduction 6.2 Fixism Versus Mobilism 6.2.1 The Theory of Continental Drift 6.2.2 From Continental Drift to Plate Tectonics 6.3 Plate Tectonics: The Framework 6.4 The Plate Boundaries 6.4.1 Divergent Boundaries 6.4.2 Convergent Boundaries 6.4.3 Transform Boundaries 6.5 Why Do Plates Move? 6.6 Where, When and Why Does Subduction Start 6.7 Summary 6.8 Box 6.1 - Linear Volcanism and Hotspots 6.9 Box 6.2 - The Continents References 7 Geochemical Cycles - The Circulatory System of Planet Earth 7.1 Introduction 7.2 Geochemical Cycles: Some Definitions 7.3 The Water Cycle 7.4 The Sodium Cycle 7.5 The Carbon Biogeochemical Cycle 7.6 The Phosphorus Biogeochemical Cycle 7.7 The Nitrogen Biogeochemical Cycle 7.8 The Oxygen Cycle 7.9 The Iron Cycle 7.10 The Geochemical Cycles of Lead and Arsenic 7.11 Summary 7.12 Box 7.1 The Rock Cycle 7.13 Box 7.2 The Geochemical Cycles and the Age of the Earth References 8 The Geochemical Cycles and the Environment - How Man is Changing the Earth 8.1 Introduction 8.2 Geochemical Cycles and Environmental Pollution 8.2.1 Toxic Elements 8.2.2 Phosphorus and Nitrogen Compounds 8.3 Environmental Aspects of the Carbon Cycle 8.3.1 CO2 and the Ocean Acidification 8.3.2 CO2 and the Greenhouse Effect 8.3.3 CO2 and Climatic Change: A Geological Perspective 8.3.4 A Lesson for the Future 8.4 Plastic Waste Pollution 8.5 Summary 8.6 Box 8.1 - Stable Isotopes: Measuring the Temperature of the Past 8.6.1 Some Basics of Isotope Geochemistry 8.6.2 The Delta Notation 8.6.3 Oxygen-Hydrogen Isotope Geothermometry 8.7 Box 8.2 - CO2 Sequestration: The message from Decameron References 9 From Hadean to Anthropocene - The Endless Story of a Lucky Planet 9.1 Introduction 9.2 From the Solar Nebula to the Formation of Planets 9.3 Hadean: The Hellish Aeon (~4600–4000 Ma) 9.4 Archaean (4000–2500 Ma): The Dawn of Life and the Start of Modern Plate Tectonics 9.5 Proterozoic (2500–541 Ma): Oxygen, Eukaryotes, Supercontinents 9.6 Phanerozoic: The explosion of Complex Organisms (541–0 Ma) 9.6.1 The Spread of Animals and Plants 9.7 Finally, The Anthropocene 9.8 The Gaia Hypothesis 9.9 Summary 9.10 Box 9.1 - Geochronology: How Ages of Rocks, Fossils and Geologic Events Are Determined 9.10.1 Relative Age of Rocks and Fossils 9.10.2 Absolute Age References 10 Epilogue 10.1 The Earth Anomaly 10.2 The Best of All Possible Worlds 10.3 Historical Times, Geological Times 10.4 Technology, Natural Resources and Environmental Impact 10.5 Natura, Non Nisi Parendo Vincitur Correction to: Air, Water, Earth, Fire Further Reading Index
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  • 3
    Monograph available for loan
    Monograph available for loan
    Berlin [u.a.] : Springer
    Call number: M 06.0282
    Description / Table of Contents: Contents: Plio-Quaternary Magmatism in Italy. - The Tuscany Magmatic Province. - The Umbria-ultra-alkaline Province. - The Roman Province. - Roccamonafina Province. - The Campania Province and Mt. Vulture. - The Aeolian Arc. - Sicily Na-alkaline Province. - Tyrrhenian Sea and Sardinia. - Geodynamic Setting.
    Type of Medium: Monograph available for loan
    Pages: XIV, 365 S. + 1 CD-ROM , Ill., graph. Darst. , 24 cm
    ISBN: 354025885X
    Classification:
    Petrology, Petrography
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 156 (1999), S. 421-443 
    ISSN: 1420-9136
    Keywords: Key Words: Potassic magmatism, upper mantle, metasomatism, geophysical-geochemical models, central-southern Italy.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract —The Italian peninsula shows high complexity of the mantle-crust system and of the Plio-Quaternary magmatism. The lithospheric thickness has remarkable lateral variations from about 110 km to about 30 km. Intermediate and deep-focus earthquakes indicate the presence of a lithospheric slab under the Aeolian-Calabrian area and at the southern end of Campania. Much less extensive intermediate-depth seismicity characterizes the Roman-Tuscany region, where the existence of a relic slab has been hypothesized. The deep seismicity in the southern Tyrrhenian Sea is associated with active calcalkaline to shoshonitic volcanism in the Aeolian arc. Alkaline potassic volcanism occurs in central Italy, and potassic lamproitic magmatism coexists with crustal anatectic and various types of hybrid rocks in the Tuscany area.¶The parallelism between changing magmatism and variation of the structure of the crust-mantle system makes central-southern Italy a key place where petrological and geophysical data can be used to work out an integrated model of the structure and composition of the upper mantle. Beneath Tuscany the upper mantle has been affected by intensive subduction-related metasomatism. This caused the formation of phlogopite-rich veins that cut through residual spinel-harzburgite and dunite. These veins, possibly partially molten, may explain the unusually soft mechanical properties that are detected just below the Moho. In the Roman Province, the upper mantle is formed by a relatively thin lid (the mantle part of the lithosphere) and by metasomatic fertile peridotite, probably connected with the upraise of an asthenospheric mantle wedge above the Apennines subduction zone. Geochemical data indicate that metasomatism, though still related to subduction, had different characteristics and age than in Tuscany. In the eastern sector of the Aeolian arc and in the Neapolitan area, the upper mantle appears to be distinct from the Roman and Tuscany areas and is probably formed by fertile peridotite contaminated by the presently active subduction of the Ionian Sea floor.¶The overall picture is that of a mosaic of various mantle domains that have undergone different evolutionary history in terms of both metasomatism and pre-metasomatic events. The coexistence side by side of these sectors is a key factor that has to be considered by models of the geodynamic evolution of the Central Mediterranean area.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0819
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Major, trace element and Sr-isotope compositions are reported for a suite of lavas coming from the area of Commenda in the SE Vulsinian district. The analyzed samples have all low silica contents and variable but generally high CaO, MgO and FeOt. Based on K2O% and K2O/Na2O ratio, the rocks from Commenda can be classified as belonging to the Potassic Series (KS) and the High-potassium Series (HKS). The HKS rocks appear to have derived by cristal/liquid fractionation from the most mafic types with separation of olivine and clinopyroxene and then of clinopyroxene + leucite. The most primitive HKS rocks have aphyric texture and high Mg-values, Cr and Ni contents which are close or within the range of values of magmas formed by partial melting of periodititic mantle sources. The KS rocks have lower incompatible element contents as the HKS rocks with similar degree of evolution. The variations of Sr-isotopic ratios of the analyzed rocks and of other Vulsinian lavas, indicate that the basic HKS Vulsinian rocks did not interact significantly with the continental crust. Instead, the KS appears to have evolved by combined crystal fractionation and assimilation processes, starting from parental magmas which had87Sr/86Sr ratio not significantly lower than that found in the less evolved rocks of the suite. The most primitive HKS rocks from Commenda have hygromagmatophile element distribution pattern characterized by high ratio of LILE/HFSE with negative anomalies of Ta and Ti, resembling closely those of other Roman mafic volcanics. The primitive geochemical characteristics of the Commenda rocks exclude that these features are the products of interaction with the crust and provide a further support to the hypothesis of a genesis within a subduction-modified mantle source.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Earth and Planetary Science Letters 23 (1974), S. 193-198 
    ISSN: 0012-821X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Earth and Planetary Science Letters 32 (1976), S. 121-126 
    ISSN: 0012-821X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Nuclear Inst. and Methods in Physics Research, B 64 (1992), S. 517-522 
    ISSN: 0168-583X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Zusammenfassung Der appidische (29 Ma) Cima di Vila (Zinsnock) Pluton (CdV) in südtirol besteht hauptsächlich aus Granodioriten and wenigen Tonaliten. Späte granitische und aplitische Gänge durchsetzen den Pluton, der auch einige mikrogranulare malische Enklaven enthält. Haupt-, Spuren- and Sr-Isotopenanalytik belegen, daß die mafischen, intermediären and sauren Magmen in der CdV Intrusion nicht alle streng comagmatisch sind. Aufschmelzung der unteren kontinentalen Kruste erklärt die mineralogischen und geochemischen Charakteristika weitaus besser. Die Tonalite werden als Mischung saurer und mafischer (Mantel-) Magmen erklärt, während die Granite und Aplite Produkte einer Separation von Restschmelzen von einemin situ kristallisierten granodioritischen Magma repräsentieren. Eine Studie der mafischen Enklaven und der Nebengesteine zeigt außerdem eine intensive Interaktion der mafischen und der sauren Magmen während der Platznahme und Kristallisation des Granodioritkörpers. Diese Interaktion hatte eine selektive Anreicherung einiger Elemente (Rb, K, Ba) in den mafischen Magmen zur Folge. Teilkristallisation des mafischen Magmas und die Interaktion der Restschmelzen mit dem granodioritischen Wirtsmagma resultierten in einer LREE-Abreicherung in den Enklaven. Sr-Isotope zeigen, daß, trotz der weitldufigen Austauschprozesse zwischen dem sauren Magma and den Enklaven, kein Gleichgewicht errreicht wurde. Späte Fluide aus den Nebengesteinen spielten eine wichtige Rolle für die Sr- Isotopenzusammensetzungen in den spät kristallisierten granitischen und aplitischen Schmelzen.
    Notes: Summary The Alpine (29 Ma) stock of Cima di Vila (CdV, Zinsnock), South Tyrol/Alto Adige, Eastern Alps consists of dominant granodiorites with a few tonalites. Late granitic and aplitic dykes cut the pluton, which also contains several microgranular mafic enclaves. Major, trace element and Sr isotopic data reported for samples of various lithologies indicate that mafic, intermediate and acidic magmas in the CdV intrusion are not all strictly comagmatic. Crustal melting of lower continental crust appears to explain better the mineralogical and geochemical characteristics of granodiorites. Mingling between salic and mantle-derived mafic magmas is responsible for the genesis of tonalites, whereas granites and aplites are the products of separation of residual liquid fromin situ crystallized granodioritic magma. Studies of mafic enclaves and adjoining host rocks indicate that mafic and acidic magmas interacted extensively during the emplacement and crystallization of the granodioritic mass. This interaction produced selective enrichments of some elements (Rb, K, Ba) in the mafic magmas at the expense of the nearby acid magmas. Partial crystallization of the mafic magma and equilibration between the residual liquid and the host granodioritic magma produced a depletion of LREE contents in the enclaves. Sr isotopic data indicate that equilibrium between acidic magma and enclaves was not reached, in spite of the large chemical exchanges between mafic blobs and host granodiorites. Late stage fluids from the wall-rocks had an important role in determining Sr isotopic composition of the latest crystallized granitic and aplitic melts.
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  • 10
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Abstract A discussion is made on the general significance of an Early Miocene (22–23 Ma, K/Ar dating) basaltic dike swarm that outcrops within large areas of the central and western Betic Zone of the Betic Cordilleras (Southern Spain). This dike swarm is thought to represent the remains of one of the earliest magmatic episodes within the the Neogene volcanic province that is associated with the late orogenic evolution of the Alboran region, and undoubtedly offers the best preserved igneous material related to this early stage that is known at present. The dike rocks (hypabyssal equivalents of andesitic basalts and basaltic andésites) have both major and trace-element abundance patterns that are akin to those of arc-tholeiitic suites. The field relationships and areal distribution of the dike swarm suggest, on the other hand, that a major E-W-trending rifting belt could have been developing within the Alboran Block in oligo-miocene times, previous to its collision with adjacent continental borderlands in the Early-Middle Miocene. Because of their magmatic character and wide distribution, it is proposed that these dike rocks may be regarded as an indication of the existence of roughly contemporaneous (Oligo-Miocene) Benioff-Wadati zone activity under the Alboran Area, which also points towards the previous existence of subductable lithosphere in its surroundings. The main dilatational vector during dike emplacement was already normal to the present E-W stretching of the Alboran Basin proper, which also adds to the possibility that the latter had already started to individualize tectonically in Oligo-Miocene times, and that some of its present crustal features, especially a prominent E-W-trending pattern of magnetic anomalies, had been generated in relation with the dike event. Continued postcollisional Middle Miocene to Pliocene calc-alkaline to ultrapotassic volcanism in the same area could hence have resulted from decompression partial melting of an already contaminated, and still thermally anomalous, mantle wedge, connected with the occurrence of traverse strike-slip and extensional deep faulting within a crustal segment that stretches from southeastern Spain to Morocco.
    Abstract: Resumen Se hace una discusión sobre la significación general de un enjambre de diques (22–23 M.a., datación K/Ar) que aflora en una amplia extensión de la Zona Bética (Cordilleras Béticas, España Meridional). Este enjambre de diques représenta probablemente uno de los primeras episodios magmáticos dentro de la provincia volcánica neógena asociada a la evolución orogénica tardia de la región del Mar de Alborán, y ofrece en todo caso el material igneo mejor preservado en relación con este estadio de los conocidos hasta el presente. Las rocas que constituyen los diques (equivalentes hipoabisales de basaltos andesiticos y andesitas basálticas) poseen caracteres geoquímicos tanto de elementos mayores como de trazas que son afines a los de las series toleáticas de arcos insulares. Su distribución areal y relaciones de campo indican, por otra parte, que una banda dilatacional podría haberse estado desarrollando en el área de Alborán en tiempos oligo-miocenos, con anterioridad a la colisión del Bloque de Alborán con las áreas continentales adyacentes en el Mioceno Inferior-Medio. A causa tanto de su afinidad magmática como de su amplia distribución areal, estas rocas vienen a indicar la existencia, contemporánea, de una zona de Benioff-Wadati activa bajo la región de Alborán y, por ende, la presencia previa de litosfera subducible en sus inmediaciones. El principal vector dilatacional durante la intrusión de los diques era ya normal a la actual elongación de la cuenca de Alborán, lo cual también sugiere la posibilidad de que aquella hubiese comenzado a individualizarse tectónicamente durante el Oligoceno ó Mioceno Inferior. En tal caso el episodio volcńico representado por los diques podría explicar algunas de las características de la corteza subyacente a esta cuenca, y en especial la existencia de una prominente red de anomalias magnéticas de dirección E-W, paralela a la red de dikes. El desarrollo posterior del volcanismo en esta provincia podria haber resultado de la fusión partial de una zona del manto previamente contaminada, y aún térmicamente anómala, en conexión con la actuación de desgarres y fracturación distensiva en una banda litosférica que se extiende desde el sureste de la peninsula ibérica hasta Marruecos.
    Notes: Zusammenfassung Über die generelle Bedeutung einer Vielzahl von Gängen (22–23 Ma, K/Ar-Datierung) wird diskutiert, die in einem weiten Gebiet der Betischen Zone aufgeschlossen sind. Diese Vielzahl von Gängen repräsentiert wahrscheinlich eine der ersten magmatischen Episoden innerhalb der vulkanischen neogenen Provinz, welche mit der späten tektonischen Entwicklung der Region des Alboranischen Meeres verbunden ist. Diese Gänge bieten in jedem Fall das besterhaltene magmatische Material, verglichen mit denen, die man bis jetzt kennt. Die Gesteine, die diese Gänge bilden (hypoabyssiche Aequivalente andesitischer Basalte und basaltischer Andesite), besitzen ebenso Hauptelemente wie auch Spurenelemente, die den Tholeiit-Serien der Inselbögen ähnlich sind. Ihre Flächenverteilung und Feldbeziehungen geben auch an, daß ein ausgedehnter Gürtel in der Zone von Alboran in oligo-miozänen Zeiten in Entwicklung war, bevor sich der Zusammenstoß des sogenannten Alboranblocks mit der naheliegenden Kontinentalzone im unteren-mittleren Miozän produzierte. Diese Gesteine geben das gleichzeitige Vorhandensein einer Benioff-Wadati-Zone aktiv unter der Region von Alboran an, sowohl auf Grund ihres magmatischen Aussehens wie auch auf Grund ihrer weiten Flächenverteilung, und deshalb zeigen sie auch die vorige Existenz subduktionsfähiger Lithosphäre in ihrer Nähe. Der Hauptdilatationsvektor war schon während der Intrusion der Gänge normal zur jetzigen Elongation des Alboran-Beckens gerichtet, was auch vermuten läßt, daß jenes Becken schon während des Oligozäns oder des unteren Miozäns begonnen hatte, sich tektonisch zu individualisieren. In diesem Fall könnte die durch die Gänge repräsentierte vulkanische Episode einige der Charakteristika der dem Becken unterliegenden Kruste erklären und speziell das Vorhandensein eines wichtigen Netzes von magnetischen Anomalien, das Ost-West verläuft. Die spätere Entwicklung des Vulkanismus in dieser Provinz konnte sich aus der Partialschmelzung einer vorher kontaminierten und sogar thermisch anomalen Zone des Mantels ergeben haben, verbunden mit dem Wirken von Verwerfungen und zerrenden Brüchen in einem lithosphärischen Gürtel, der sich vom Südosten der Iberischen Halbinsel bis Marokko ausbreitet.
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