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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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    GEOMAR CATALOGUE
    Link to Library Catalog
    get availability status
  • 2
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    ArcCRUST: Arctic crustal thickness from 3D gravity inversion, links to files in NetCDF format (2019)
    PANGAEA
    In:  Supplement to: Lebedeva-Ivanova, Nina; Gaina, Carmen; Minakov, Alexander; Kashubin, Sergei (2019): ArcCRUST: Arctic Crustal Thickness From 3‐D Gravity Inversion. Geochemistry, Geophysics, Geosystems, 20(7), 3225-3247, https://doi.org/10.1029/2018GC008098
    Details
    Publication Date: 2023-01-30
    Description: The ArcCRUST model consists of crustal thickness and estimated crustal thinning factors grids for the High Arctic and Circum-Arctic regions (north of 67°N). This model is derived by using 3D forward and inverse gravity modelling. Updated sedimentary thickness grid, an oceanic lithosphere age model together with inferred microcontinent rifting ages, variable crystalline crust and sediment densities, and dynamic topography models constrain this inversion. We use published high-quality 2D seismic crustal-scale models to create a database of Depths to Seismic Moho (DSM) profiles. To check the quality of the ArcCRUST model, we have performed a statistical analysis of misfits between the ArcCRUST Moho depths and DSM values. Systematic analysis of the misfits within the Arctic sedimentary basins provides information about tectonic processes unaccounted by the assumed model of pure-shear lithospheric extension. In particular, our model implies a less-dense and/or thin mantle lithosphere underneath microcontinents in the deep Arctic Ocean where the ArcCRUST depth to Moho values exceed the depth to seismic Moho. A systematically larger gravity-derived crustal thickness (ca. 3 km) under the western and northern Greenland Sea points to a hotter upper mantle implied by the seismic tomography models in the North Atlantic.
    Keywords: ArcCRUST-AgeOceanicLithosphere; ArcCRUST-CrustalThickness; ArcCRUST-Moho; ArcCRUST-SedimentThickness; Arctic; crutsal thickness; Event label; File content; File format; File name; File size; Moho; oceanic lithosphere; sediment thickness; Uniform resource locator/link to file
    Type: Dataset
    Format: text/tab-separated-values, 24 data points
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    DATA PANGAEA
  • 3
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    Ice rafted debris in sediment of ODP Hole 151-911A (2017)
    PANGAEA
    In:  Geological Survey of Norway/Norges Geologiske Undersokelse, Trondheim
    Details
    Publication Date: 2023-06-27
    Keywords: 151-911A; AGE; Calculated; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Ice rafted debris; Joides Resolution; Leg151; North Greenland Sea
    Type: Dataset
    Format: text/tab-separated-values, 406 data points
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    DATA PANGAEA
  • 4
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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
  • 5
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    Making a Better Magnetic Map (2019)
    Details
    Publication Date: 2020-11-11
    Description: A new version of the World Digital Magnetic Anomaly Map, released last summer, gives greater insight into the structure and history of Earth's crust and upper mantle.
    Description: Published
    Description: 1A. Geomagnetismo e Paleomagnetismo
    Description: N/A or not JCR
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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    PAPER (OA)
  • 6
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    The opening of the Arctic-Atlantic gateway: IODP Full proposal #934 (2018)
    Norges geologiske undersøkelse (NGU)
    In:  EPIC3Colloquium on Norwegian Research Activities within the International Ocean Discovery Program (IODP), Geological Survey of Norway, Trondheim, 2018-10-29-2018-10-30Trondheim, Norges geologiske undersøkelse (NGU)
    Details
    Publication Date: 2018-12-05
    Description: The modern polar cryosphere reflects an extreme climate state with profound temperature gradients towards high-latitudes. It developed in association with stepwise Cenozoic cooling, beginning with ephemeral glaciations and the appearance of sea ice in the late Middle Eocene. The polar ocean gateways played a pivotal role in changing the polar and global climate, along with declining greenhouse gas levels. The opening of the Drake Passage finalized the oceanographic isolation of Antarctica, some 40 Ma ago. The Arctic Ocean was an isolated basin until the early Miocene when rifting and subsequent sea-floor spreading started between Greenland and Svalbard, initiating the opening of the Fram Strait / Arctic-Atlantic Gateway (AAG). Although this gateway is known to be important in Earth's past and modern climate, little is known about its Cenozoic development. Indeed, the opening history and AAG's consecutive widening and deepening must have had a strong impact on circulation and water mass exchange between the Arctic Ocean and the North Atlantic. To study the Arctic-Atlantic gateway's complete history, ocean drilling (IODP Full 934) at four (primary) sites located between 73°N and 78°N are proposed. These sites will provide unprecedented sedimentary records that will unveil (1) the history of shallow-water exchange between the Arctic Ocean and the North Atlantic, and (2) the development of the AAG to a deep-water connection and its influence on the global climate system.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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    PAPER (OA)
  • 7
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    Seismic volcano-stratigraphy of the Northeast Greenland continental margin (2016)
    Geological Society
    In:  EPIC3The NE Atlantic Region: A Reappraisal of Crustal Structure, Tectonostratigraphy and Magmatic Evolution, Geological Society, London, Special Publications, London, Geological Society
    Details
    Publication Date: 2021-01-26
    Description: The Early Eocene continental break-up between the NE Greenland and the mid- Norwegian–SW Barents Sea margins was associated with voluminous magmatism and led to the emplacement of massive volcanic complexes including wedges of seawards-dipping reflections (SDR). We study the distribution of these break-up-related volcanic rocks along the NE Greenland margin by revisiting existing seismic reflection data and comparing our observations to betterstudied segments of the conjugate margin. Seismic facies types match between the conjugate margins and show strong lateral variations. Seaward-dipping wedges are mapped offshore East Greenland, the conjugate to the Vøring continental margin. The geophysical signature of the SDRs becomes less visible towards the north, as it does along the conjugate Lofoten–Vestera°len margin. We suggest that the Traill Ø volcanic ridge is a result of plume–ridge interactions formed between approximately 54 and 47 Ma. North of the East Greenland Ridge, strong basement reflections conjugate to the Vestbakken Volcanic Province are interpreted as lava flows or ‘spurious’ SDRs. We discuss our findings in conjunction with results from seismic wide-angle experiments, gravity and magnetic data. We focus on the spatial and temporal relationships of the break-up volcanic rocks, and their structural setting in a late rift and initial oceanic drift stage.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Inbook , peerRev
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  • 8
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    Seismic volcano-stratigraphy of the Northeast Greenland continental margin (2016)
    In:  EPIC3NAG-TEC Workshop, GEUS Copenhagen, 2016-10-13
    Details
    Publication Date: 2016-12-11
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 9
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    The Opening of the Arctic-Atlantic Gateway: Tectonic, Oceanographic and Climatic Dynamics - an IODP Initiative (2015)
    Geological Survey of Norway
    In:  EPIC37th International Conference on Arctic Margins - ICAM 2015, Trondheim, Norway, 2015-06-02-2015-06-05Report no. 2015.032, p. 51-52, Geological Survey of Norway
    Details
    Publication Date: 2016-01-21
    Description: The modern polar cryosphere reflects an extreme climate state with profound temperature gradients towards high-latitudes. It developed in association with stepwise Cenozoic cooling, beginning with ephemeral glaciations and the appearance of sea ice in the late middle Eocene. The polar ocean gateways played a pivotal role in changing the polar and global climate, along with declining greenhouse gas levels. The opening of the Drake Passage finalized the oceanographic isolation of Antarctica, some 40 Ma ago. The Arctic Ocean was an isolated basin until the early Miocene when rifting and subsequent sea-floor spreading started between Greenland and Svalbard, initiating the opening of the Fram Strait / Arctic-Atlantic Gateway (AAG). Although this gateway is known to be important in Earth’s past and modern climate, little is known about its Cenozoic development. However, the opening history and AAG’s consecutive widening and deepening must have had a strong impact on circulation and water mass exchange between the Arctic Ocean and the North Atlantic. To study the AAG’s complete history, ocean drilling at two primary sites and one alternate site located between 73°N and 78°N in the Boreas Basin and along the East Greenland continental margin are proposed. These sites will provide unprecedented sedimentary records that will unveil (1) the history of shallow-water exchange between the Arctic Ocean and the North Atlantic, and (2) the development of the AAG to a deep-water connection and its influence on the global climate system. The specific overarching goals of our proposal are to study: (1) the influence of distinct tectonic events in the development of the AAG and the formation of deep water passage on the North Atlantic and Arctic paleoceanography, and (2) the role of the AAG in the climate transition from the Paleogene greenhouse to the Neogene icehouse for the long-term (~50 Ma) climate history of the northern North Atlantic. Getting a continuous record of the Cenozoic sedimentary succession that recorded the evolution of the Arctic-North Atlantic horizontal and vertical motions, and land and water connections will also help better understanding the post-breakup evolution of the NE Atlantic conjugate margins and associated sedimentary basins.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 10
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    Effect of early Pliocene uplift on late Pliocene cooling in the Arctic–Atlantic gateway (2014)
    In:  EPIC3Earth and Planetary Science Letters, 387, pp. 132-144, ISSN: 0012-821X
    Details
    Publication Date: 2015-10-03
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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