West Gondwana
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West Gondwana
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Author : Robert J. Pankhurst
language : en
Publisher: Geological Society of London
Release Date : 2008
West Gondwana written by Robert J. Pankhurst and has been published by Geological Society of London this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Science categories.
Tectonic Overview Of The West Gondwana Margin
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Author : A.P.M. Vaughan
language : en
Publisher:
Release Date : 2008
Tectonic Overview Of The West Gondwana Margin written by A.P.M. Vaughan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Geology Of Western Gondwana 2000 500 Ma
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Author : Roland Trompette
language : en
Publisher: CRC Press
Release Date : 2020-08-26
Geology Of Western Gondwana 2000 500 Ma written by Roland Trompette and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-08-26 with Science categories.
In considering the geology of Western Gondwana, this text covers: the Pan-African-Brasiliano cratons; the Pan-African-Brasiliano fold belts; and amosaic of Pan-African-Brasiliano mini-cratons and mino-fold belts: Northeast Brazil and the Central-Western portion of Africa.
The West Gondwana Margin
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Author : C. Casquet
language : en
Publisher:
Release Date : 2008
The West Gondwana Margin written by C. Casquet and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Assembling West Gondwana In The Neoproterozoic
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Author : F.F. ALKMIM
language : en
Publisher:
Release Date : 2001
Assembling West Gondwana In The Neoproterozoic written by F.F. ALKMIM and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Geodynamic Evolution Of East Antarctica
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Author : M. Satish-Kumar
language : en
Publisher: Geological Society of London
Release Date : 2008
Geodynamic Evolution Of East Antarctica written by M. Satish-Kumar and has been published by Geological Society of London this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Science categories.
Geological correlations of East Antarctica with adjoining continents have been puzzling geologists ever since the concept of a Gondwana supercontinent surfaced. Despite the paucity of outcrops because of ice cover, difficulty of access and extreme weather, the past 50 years of Japanese Antarctic Research Expeditions (JARE) has successfully revealed vital elements of the geology of East Antarctica. This volume presents reviews and new research from localities across East Antarctica, especially from Dronning Maud Land to Enderby Land, where the geological record preserves a history that spans the Archaean and Proterozoic. The reviews include extensive bibliographies of results obtained by geologists who participated in the JARE. Comprehensive geological, petrological and geochemical studies, form a platform for future research on the formation and dispersion of Rodinia in the Mesoproterozoic and subsequent assembly of Gondwana in the Neoproterozoic to Early Palaeozoic.
Geology Of Western Gondwana 2000 500 Ma
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Author : Roland Trompette
language : en
Publisher: CRC Press
Release Date : 1994-01-01
Geology Of Western Gondwana 2000 500 Ma written by Roland Trompette and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994-01-01 with Science categories.
In considering the geology of Western Gondwana, this text covers: the Pan-African-Brasiliano cratons; the Pan-African-Brasiliano fold belts; and amosaic of Pan-African-Brasiliano mini-cratons and mino-fold belts: Northeast Brazil and the Central-Western portion of Africa.
Ross Age Amalgamation Of East And West Gondwana
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Author : F. TESSENSOHN
language : en
Publisher:
Release Date : 1999
Ross Age Amalgamation Of East And West Gondwana written by F. TESSENSOHN and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Geology Of Southwest Gondwana
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Author : Siegfried Siegesmund
language : en
Publisher: Springer
Release Date : 2018-02-02
Geology Of Southwest Gondwana written by Siegfried Siegesmund and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02-02 with Science categories.
This book focuses on the geological evolution of Southwest (SW) Gondwana and presents state-of-the-art insights into its evolution. It addresses the diachronic assembly of continental fragments derived from the break-up of the Rodinia supercontinent later amalgamated to build SW Gondwana during the Neoproterozoic–Cambrian transition, which on a global scale includes parts of present-day South America, Africa and Madagascar. The book presents 24 state-of-the-art reviews including the most crucial controversies. Most experienced scientists about the geology of SW Gondwana from Europe, Africa, South America and Australia present contributions on key areas addressing the interactions between the main cratons and fold belts on both sides of the South Atlantic Ocean. Chapters related to the geology of the major Archean- Paleoproterozoic cratons and Neoproterozoic Brasiliano/Pan-African fold belts enable readers to gain an in-depth understanding of the tectonometamorphic and magmatic evolution of SW Gondwana. The book covers a wide range of issues including metallogenetic, sedimentary, paleobiological and paleoclimatic processes and allows a deep insight into this key period of the Earth’s evolution.
Evolution Of The Patagonian West Antarctica Margin Of Gondwana In The Palaeozoic Early Mesozoic
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Author : Paula Alejandra Castillo Gonzalez
language : en
Publisher:
Release Date : 2017
Evolution Of The Patagonian West Antarctica Margin Of Gondwana In The Palaeozoic Early Mesozoic written by Paula Alejandra Castillo Gonzalez and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
A number of conflicting tectonic models have been proposed to explain the geological relationships between southern South America (Patagonia) and West Antarctica within the palaeo-Pacific margin of Gondwana. Extensive fragmentation and isolation of the various tectonic blocks during Gondwana break-up have complicated interpretations and palaeogeographic reconstructions. In order to explore and test the different tectonic models, I combine zircon U-Pb, Lu-Hf and O isotopic data for samples from key locations throughout the north and south of Patagonia, the Antarctic Peninsula and the Ellsworth Mountains in West Antarctica. Zircon is a robust refractory mineral that occurs in igneous and metamorphic rocks and survives multiple sedimentary cycles with little change to its isotopic composition. It therefore preserves a perfect archive for testing tectonic correlations.Igneous rocks from the Ellsworth Mountains were dated at ca. 680 Ma, older than previously reported. These zircons indicate that rifting, which affected Mesoproterozoic crust, likely occurred in the Cryogenian and supports a connection between the Ellsworth-Whitmore Mountain block and East Antarctica before the amalgamation of Gondwana. This agrees with the break-up of Rodinia in the context of the southwest United States and East Antarctica configuration. U-Pb zircon dating and O-Hf isotopic compositions of detrital zircons from the Ellsworth Mountains also support this connection, indicating a likely East Antarctic provenance. A Cambrian magmatic event is recorded by zircon at ca. 520 Ma, also related to an extensional setting - but in this case with crustal recycling. I interpret this Cambrian magmatism as a result of a tectonic escape after a collision between the Australo-Antarctic and West Gondwana/Indo-Antarctic plates.In Tierra del Fuego, samples from drill cores indicate that Cambrian magmatism occurred between ca. 540 and 520 Ma with strong similarities to the Pampean Orogen of Argentina. Metamorphism occurred at ca. 265 Ma, when zircon crystallized from high temperature aqueous fluids that previously interacted with Grenvillian rocks. Importantly, igneous rocks from Tierra del Fuego record the first evidence of Permian magmatism at ca. 255 Ma, arising from melting of Cambrian rocks. This suggests prolongation of Permian magmatism from the North Patagonian Massif in northern Patagonia and also connections to the Eastern Domain of the Antarctic Peninsula. Granitic rocks in northern Patagonia record mantle-like O magmatic inputs at ca. 280 Ma and 255 Ma, but with reworking of upper crustal materials between these two events. In north-western Patagonia, Early Permian granites indicate continuity of the Permian magmatic belt along the western margin of South America farther north. Further, detrital Permian zircons in Late Palaeozoic-Early Mesozoic accretionary complexes suggest a continuation of a slightly older Permian subduction-related magmatic arc, partly located in Patagonia and extending to the Antarctic Peninsula. All this data, together with other geological considerations, are in line with an autochthonous or parautochthonous origin for northern Patagonia. It also confirms connections between southern Patagonia and the Antarctic Peninsula from late Palaeozoic to Jurassic times. I suggest that Patagonia rifted from the South African-Ellsworth sector of the paleao-Pacific margin of Gondwana to then collide with the same sector during the Guadalupian.