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  • 1
    Book
    Book
    The NE Atlantic region : a reappraisal of crustal structure, tectonostratigraphy and magmatic evolution (2017)
    London : The Geological Society
    Details Availability
    Keywords: Geology History ; Continental margins History ; Geology Research ; Continental margins Research ; Geodynamics ; Magmas Evolution ; Aufsatzsammlung ; Atlantischer Ozean Nordost ; Kontinentalrand ; Rift ; Extension ; Sedimentationsbecken ; Plattentektonik ; Island-Färöer-Rücken ; Kontinentalrand ; Rifting ; Störung ; Becken ; Tektonik ; Europäisches Nordmeer ; Mittelatlantischer Rücken Nord ; Reykjanesrücken ; Shetlandinseln ; Jan-Mayen-Rücken ; Kolbeinsey-Rücken ; Norwegensee ; Grönlandsee ; Seafloor spreading ; Aufsatzsammlung ; Atlantischer Ozean Nordost ; Kontinentalrand ; Rift ; Extension ; Sedimentationsbecken ; Plattentektonik ; Island-Färöer-Rücken ; Kontinentalrand ; Rifting ; Störung ; Becken ; Tektonik ; Europäisches Nordmeer ; Mittelatlantischer Rücken Nord ; Reykjanesrücken ; Shetlandinseln ; Jan-Mayen-Rücken ; Kolbeinsey-Rücken ; Norwegensee ; Grönlandsee ; Seafloor spreading ; Aufsatzsammlung
    Description / Table of Contents: The NAG-TEC project was a collaborative effort by the British Geological Survey, the Geological Survey of Denmark and Greenland, the Geological Survey of Ireland, the Geological Survey of the Netherlands, the Geological Survey of Northern Ireland, the Geological Survey of Norway, Iceland GeoSurvey and the Faroese Geological Survey (Jarðfeingi), along with a number of academic partners and significant support from industry. The main focus was to investigate the tectonic evolution of the region with a particular emphasis on basin evolution along conjugate margins. A key outcome was the development of a new tectonostratigraphic atlas and database that includes comprehensive geological and geophysical information relevant for understanding the Devonian to present evolution of the NE Atlantic margins. These provide the foundation upon which ongoing research and exploration of the area can build. This Special Publication provides some of the first scientific results and analysis based on the project, including regional stratigraphic analysis and correlations, crustal structure and interpretation of geophysical data sets, plate kinematics and the evolution of igneous provinces.--
    Type of Medium: Book
    Pages: vi, 467 Seiten , Illustrationen, Karten, Diagramme
    ISBN: 9781786202789
    Series Statement: Geological Society Special publication no. 447
    URL: http://www.gbv.de/dms/tib-ub-hannover/1002798809.pdf
    DDC: 551.70091633
    Language: English
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  • 2
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    Cretaceous ocean formation in the High Arctic (2020)
    Elsevier
    Details
    Publication Date: 2023-02-08
    Description: Understanding the evolution of ocean basins is critical for studies in global plate tectonics, mantle dynamics, and sea-level through time, and relies on identifiable tectonic plate boundaries. The evolution of the 2.5 million km2 Amerasia Basin in the Arctic Ocean remains largely unsettled due to widespread overprint by the Cretaceous High-Arctic Large Igneous Province. Traces of an extinct, but deeply buried, spreading centre (herein South Amerasia Ridge, SAR) has been shown to exist in the southern part of the Amerasia Basin, in the Canada Basin. However, structural details of the SAR and, hence, the kinematic evolution of the Canada Basin, are yet to be unraveled. Based on 3D gravity inversion and the vertical gravity gradient of the latest generation of satellite gravity models, we document new structures within the Canada Basin spreading system. Our results are supported by analysis of aeromagnetic and recent marine geophysical data. Evidence is shown of consistent oblique segmentation of the SAR spreading centre in a right stepping en echelon pattern. The spreading segments are offset by northeast-trending non-transforms that are traceable throughout the oceanic crustal domain and parallel to pre-oceanic strike-slip faults in the older part of the Canada Basin. We interpret the SAR to have formed by highly oblique spreading in a northeast-southwest direction. We compare the predicted SAR basement topography with the global ridge systems and produce a detailed magnetic modelling also constrained by the basement topography. The results indicate that the SAR crust formed by a slow-to-intermediate spreading regime and that sea-floor spreading terminated during a reverse polarity chron, most likely in the Early Cretaceous. Our novel plate reconstruction model, adopting a highly oblique spreading in Canada Basin, requires a translational motion of the Alaska/Chukotka tectonic block, replacing the decades-old rotational model of the Cretaceous High Arctic.
    Type: Article , PeerReviewed
    Format: text
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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