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  • Refraction seismics  (1)
  • Rifting  (1)
  • geochronology  (1)
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  • 1
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    The NE Atlantic Region : A Reappraisal of Crustal Structure, Tectonostratigraphy and Magmatic Evolution (2017)
    London : The Geological Society
    Details
    Keywords: Atlantic ; North Atlantic ; Greenland ; Iceland ; geochronology ; volcanism ; crustal structure
    Description / Table of Contents: The NE Atlantic region: a reappraisal of crustal structure, tectonostratigraphy and magmatic evolution – an introduction to the NAG-TEC project / Gwenn Péron-Pinvidic, John R. Hopper, Martyn Stoker, Carmen Gaina, Thomas Funck, Uni E. Árting and Johannes Cornelis Doornenbal / Geological Society, London, Special Publications, 447, 1-10, 12 July 2017, https://doi.org/10.1144/SP447.17 --- Stratigraphy --- An overview of the Upper Palaeozoic–Mesozoic stratigraphy of the NE Atlantic region / M. S. Stoker, M. A. Stewart, P. M. Shannon, M. Bjerager, T. Nielsen, A. Blischke, B. O. Hjelstuen, C. Gaina, K. McDermott and J. Ólavsdóttir / Geological Society, London, Special Publications, 447, 11-68, 11 August 2016, https://doi.org/10.1144/SP447.2 --- Geochronology and volcanism --- Compilation and appraisal of geochronological data from the North Atlantic Igneous Province (NAIP) / Camilla M. Wilkinson, Morgan Ganerød, Bart W. H. Hendriks and Elizabeth A. Eide / Geological Society, London, Special Publications, 447, 69-103, 8 November 2016, https://doi.org/10.1144/SP447.10 --- Regional distribution of volcanism within the North Atlantic Igneous Province / Jim Á Horni, John R. Hopper, Anett Blischke, Wolfram H. Geisler, Margaret Stewart, Kenneth McDermott, Maria Judge, Ögmundur Erlendsson and Uni Árting / Geological Society, London, Special Publications, 447, 105-125, 11 July 2017, https://doi.org/10.1144/SP447.18 --- The Greenland–Iceland–Faroe Ridge Complex / Árni Hjartarson, Ögmundur Erlendsson and Anett Blischke / Geological Society, London, Special Publications, 447, 127-148, 19 April 2017, https://doi.org/10.1144/SP447.14 --- Seismic volcanostratigraphy of the NE Greenland continental margin / Wolfram H. Geissler, Carmen Gaina, John R. Hopper, Thomas Funck, Anett Blischke, Uni Arting, Jim á Horni, Gwenn Péron-Pinvidic and Mansour M. Abdelmalak / Geological Society, London, Special Publications, 447, 149-170, 14 December 2016, https://doi.org/10.1144/SP447.11 --- Crustal structure --- A review of the NE Atlantic conjugate margins based on seismic refraction data / Thomas Funck, Ögmundur Erlendsson, Wolfram H. Geissler, Sofie Gradmann, Geoffrey S. Kimbell, Kenneth McDermott and Uni K. Petersen / Geological Society, London, Special Publications, 447, 171-205, 12 October 2016, https://doi.org/10.1144/SP447.9 --- Moho and basement depth in the NE Atlantic Ocean based on seismic refraction data and receiver functions / Thomas Funck, Wolfram H. Geissler, Geoffrey S. Kimbell, Sofie Gradmann, Ögmundur Erlendsson, Kenneth McDermott and Uni K. Petersen / Geological Society, London, Special Publications, 447, 207-231, 13 July 2016, https://doi.org/10.1144/SP447.1 --- A 3D regional crustal model of the NE Atlantic based on seismic and gravity data / C. Haase, J. Ebbing and T. Funck / Geological Society, London, Special Publications, 447, 233-247, 12 October 2016, https://doi.org/10.1144/SP447.8 --- Focused studies --- Controls on the location of compressional deformation on the NW European margin / G. S. Kimbell, M. A. Stewart, S. Gradmann, P. M. Shannon, T. Funck, C. Haase, M. S. Stoker and J. R. Hopper / Geological Society, London, Special Publications, 447, 249-278, 12 August 2016, https://doi.org/10.1144/SP447.3 --- Isostasy as a tool to validate interpretations of regional geophysical datasets – application to the mid-Norwegian continental margin / Sofie Gradmann, Claudia Haase and Jörg Ebbing / Geological Society, London, Special Publications, 447, 279-297, 23 February 2017, https://doi.org/10.1144/SP447.13 --- The Jan Mayen microcontinent: an update of its architecture, structural development and role during the transition from the Ægir Ridge to the mid-oceanic Kolbeinsey Ridge / A. Blischke, C. Gaina, J. R. Hopper, G. Péron-Pinvidic, B. Brandsdóttir, P. Guarnieri, Ö. Erlendsson and K. Gunnarsson / Geological Society, London, Special Publications, 447, 299-337, 8 September 2016, https://doi.org/10.1144/SP447.5 --- The stratigraphy and structure of the Faroese continental margin / Jana Ólavsdóttir, Óluva R. Eidesgaard and Martyn S. Stoker / Geological Society, London, Special Publications, 447, 339-356, 22 July 2016, https://doi.org/10.1144/SP447.4 --- Review of velocity models in the Faroe–Shetland Channel / Uni K. Petersen and Thomas Funck / Geological Society, London, Special Publications, 447, 357-374, 9 September 2016, https://doi.org/10.1144/SP447.7 --- Mesozoic and older rift basins on the SE Greenland Shelf offshore Ammassalik / Joanna Gerlings, John R. Hopper, Michael B. W. Fyhn and Nicolas Frandsen / Geological Society, London, Special Publications, 447, 375-392, 13 April 2017, https://doi.org/10.1144/SP447.15 --- The oceanic domain and regional kinematics --- Break-up and seafloor spreading domains in the NE Atlantic / Carmen Gaina, Aziz Nasuti, Geoffrey S. Kimbell and Anett Blischke / Geological Society, London, Special Publications, 447, 393-417, 3 February 2017, https://doi.org/10.1144/SP447.12 --- Seamounts and oceanic igneous features in the NE Atlantic: a link between plate motions and mantle dynamics / Carmen Gaina, Anett Blischke, Wolfram H. Geissler, Geoffrey S. Kimbell and Ögmundur Erlendsson / Geological Society, London, Special Publications, 447, 419-442, 8 September 2016, https://doi.org/10.1144/SP447.6 --- The oil perspective --- Geology and seepage in the NE Atlantic region / Geert-Jan Vis / Geological Society, London, Special Publications, 447, 443-455, 7 April 2017, https://doi.org/10.1144/SP447.16
    Pages: Online-Ressource (VI, 467 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 9781786202789
    URL: https://sp.lyellcollection.org/content/447/1
    Language: English
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  • 2
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    Unknown
    Crustal structure of the ocean-continent transition at Flemish Cap : seismic refraction results (2010)
    American Geophysical Union
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © American Geophysical Union, 2003. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 108, B11 (2003): 2531, doi:10.1029/2003JB002434.
    Description: We conducted a seismic refraction experiment across Flemish Cap and into the deep basin east of Newfoundland, Canada, and developed a velocity model for the crust and mantle from forward and inverse modeling of data from 25 ocean bottom seismometers and dense air gun shots. The continental crust at Flemish Cap is 30 km thick and is divided into three layers with P wave velocities of 6.0–6.7 km/s. Across the southeast Flemish Cap margin, the continental crust thins over a 90-km-wide zone to only 1.2 km. The ocean-continent boundary is near the base of Flemish Cap and is marked by a fault between thinned continental crust and 3-km-thick crust with velocities of 4.7–7.0 km/s interpreted as crust from magma-starved oceanic accretion. This thin crust continues seaward for 55 km and thins locally to ~1.5 km. Below a sediment cover (1.9–3.1 km/s), oceanic layer 2 (4.7–4.9 km/s) is ~1.5 km thick, while layer 3 (6.9 km/s) seems to disappear in the thinnest segment of the oceanic crust. At the seawardmost end of the line the crust thickens to ~6 km. Mantle with velocities of 7.6–8.0 km/s underlies both the thin continental and thin oceanic crust in an 80-km-wide zone. A gradual downward increase to normal mantle velocities is interpreted to reflect decreasing degree of serpentinization with depth. Normal mantle velocities of 8.0 km/s are observed ~6 km below basement. There are major differences compared to the conjugate Galicia Bank margin, which has a wide zone of extended continental crust, more faulting, and prominent detachment faults. Crust formed by seafloor spreading appears symmetric, however, with 30-km-wide zones of oceanic crust accreted on both margins beginning about 4.5 m.y. before formation of magnetic anomaly M0 (~118 Ma).
    Description: This work was supported by National Science Foundation grant OCE 9819053, the Danish Research Foundation (Danmarks Grundforskningsfond), and the Natural Science and Engineering Research Council of Canada. B. Tucholke also acknowledges support by the Henry Bryant Bigelow Chair in Oceanography at Woods Hole Oceanographic Institution.
    Keywords: Refraction seismics ; Ocean-continent transition ; Serpentinized mantle
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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  • 3
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    Unknown
    A deep seismic investigation of the Flemish Cap margin: implications for the origin of deep reflectivity and evidence for asymmetric break-up between Newfoundland and Iberia (2007)
    Blackwell Publishing
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © Blacwell, 2006. This article is posted here by permission of Blackwell for personal use, not for redistribution. The definitive version was published in Geophysical Journal International 164 (2006): 501–515, doi:10.1111/j.1365-246X.2006.02800.x.
    Description: Seismic reflection and refraction data were acquired along the southeast margin of Flemish Cap at a position conjugate to drilling and geophysical surveys across the Galicia Bank margin. The data document first-order asymmetry during final break-up between Newfoundland and Iberia. An abrupt necking profile of continental crust observed off Flemish Cap contrasts strongly with gradual tapering on the conjugate margin. There is no evidence beneath Flemish Cap for a final phase of continental extension that resulted in thin continental crust underlain by a strong 'S'-like reflection, which indicates that this mode of extension occurred only on the Galicia Bank margin. Compelling evidence for a broad zone of exhumed mantle or for peridotite ridges is also lacking along the Flemish Cap margin. Instead, anomalously thin, 3–4-km-thick oceanic crust is observed. This crust is highly tectonized and broken up by high-angle normal faulting. The thin crust and rift structures that resemble the abandoned spreading centre in the Labrador sea suggest that initial seafloor spreading was affected by processes observed in present-day ultra-slow spreading environments. Landwards, Flemish Cap is underlain by a highly reflective lower crust. The reflectivity most likely originates from older Palaeozoic orogenic structures that are unrelated to extension and break-up tectonics.
    Description: This work was supported by the Danish National Research Foundation, U.S. National Science Foundation grants OCE-9819053 and OCE-0326714, and the Natural Science and Engineering Research Council of Canada. Additional support for Hopper was provided by the German Research Foundation grant MO-961/4-1. Tucholke also acknowledges support from Henry Bryant Bigelow Chair in Oceanography at Woods Hole Oceanographic Institution.
    Keywords: Continental break-up ; Newfoundland margin ; Rifting
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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