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Development history of the southern terminus of the Central Atlantic; Guyana–Suriname case study

M. Nemčok, S. Rybár, M. Odegard, W. Dickson, O. Pelech, L. Ledvényiová, M. Matejová, M. Molčan, S. Hermeston, D. Jones, E. Cuervo, R. Cheng and G. Forero
Geological Society, London, Special Publications, 431, 145-178, 14 December 2015, https://doi.org/10.1144/SP431.10
M. Nemčok
1Energy and Geoscience Institute, University of Utah, 423 Wakara Way, Suite 300, Salt Lake City, UT 84108, USA
2Energy and Geoscience Laboratory at the Geological Institute of Slovak Academy of Sciences, Dúbravská cesta 9, SK-840 05 Bratislava, Slovakia
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  • For correspondence: [email protected]
S. Rybár
2Energy and Geoscience Laboratory at the Geological Institute of Slovak Academy of Sciences, Dúbravská cesta 9, SK-840 05 Bratislava, Slovakia
3Department of Geology and Palaeontology, Comenius University, Mlynská dolina G, Bratislava 842 15, Slovakia
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M. Odegard
4Grizzly Geosciences, 5680 Highway 6, Suite 395, Missouri City, TX 77459, USA
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W. Dickson
5Dickson International Geosciences, 10260 Westheimer Road, Suite 320, Houston, TX 77042-3110, USA
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O. Pelech
2Energy and Geoscience Laboratory at the Geological Institute of Slovak Academy of Sciences, Dúbravská cesta 9, SK-840 05 Bratislava, Slovakia
3Department of Geology and Palaeontology, Comenius University, Mlynská dolina G, Bratislava 842 15, Slovakia
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L. Ledvényiová
2Energy and Geoscience Laboratory at the Geological Institute of Slovak Academy of Sciences, Dúbravská cesta 9, SK-840 05 Bratislava, Slovakia
3Department of Geology and Palaeontology, Comenius University, Mlynská dolina G, Bratislava 842 15, Slovakia
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M. Matejová
2Energy and Geoscience Laboratory at the Geological Institute of Slovak Academy of Sciences, Dúbravská cesta 9, SK-840 05 Bratislava, Slovakia
3Department of Geology and Palaeontology, Comenius University, Mlynská dolina G, Bratislava 842 15, Slovakia
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M. Molčan
2Energy and Geoscience Laboratory at the Geological Institute of Slovak Academy of Sciences, Dúbravská cesta 9, SK-840 05 Bratislava, Slovakia
6Department of Geological Sciences, Masaryk University, Kotlářská 2, Brno 611 37, Czech Republic
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S. Hermeston
7White Rose Energy Ventures, Norfolk House, 31 St James's Square, London SW1Y 4JJ, UK
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D. Jones
8CGX Energy Inc., 16360 Park 10 Place, Houston, TX 77084, USA
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E. Cuervo
8CGX Energy Inc., 16360 Park 10 Place, Houston, TX 77084, USA
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R. Cheng
8CGX Energy Inc., 16360 Park 10 Place, Houston, TX 77084, USA
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G. Forero
8CGX Energy Inc., 16360 Park 10 Place, Houston, TX 77084, USA
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Abstract

The study focuses on the offshore Guyana–Suriname–French Guiana region. It draws from seismic, well, gravimetric and magnetic data. They indicate that the continental break-up along the western margin of the Demerara Plateau took place during the Callovian–Oxfordian, associated with the Central Atlantic opening, and accommodated by normal faults. The continental break-up in the SE offshore Guyana accommodated by strike-slip faults was coeval. The continental break-up along the NE and eastern margins of the Demerara Plateau took place during the late Aptian–Albian, associated with the opening of the Equatorial Atlantic, and accommodated by dextral strike-slip and normal faults, respectively.

Different spreading vectors of the Central and Equatorial Atlantic required development of the Accommodation Block during the late Aptian/Albian–Paleocene in their contact region, and in the region between the Central Atlantic and its southernmost portion represented by the Offshore Guyana Block, which were separated from each other by the opening Equatorial Atlantic. Its role was to accommodate for about 20° mismatch between the Central and Equatorial Atlantic spreading vectors, which has decreased from the late Aptian/Albian to Paleocene down to 0°.

Differential movements between the Central and Equatorial Atlantic oceans were also accommodated by strike-slip faults of the Guyana continental margin, some active until the Paleocene.

Supplementary material: Extended methods and discussion chapters are available at http://www.geolsoc.org.uk/SUP18875

  • © 2016 The Author(s). Published by The Geological Society of London. All rights reserved
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Geological Society, London, Special Publications: 431 (1)
Geological Society, London, Special Publications
Volume 431
2016
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Development history of the southern terminus of the Central Atlantic; Guyana–Suriname case study

M. Nemčok, S. Rybár, M. Odegard, W. Dickson, O. Pelech, L. Ledvényiová, M. Matejová, M. Molčan, S. Hermeston, D. Jones, E. Cuervo, R. Cheng and G. Forero
Geological Society, London, Special Publications, 431, 145-178, 14 December 2015, https://doi.org/10.1144/SP431.10
M. Nemčok
1Energy and Geoscience Institute, University of Utah, 423 Wakara Way, Suite 300, Salt Lake City, UT 84108, USA
2Energy and Geoscience Laboratory at the Geological Institute of Slovak Academy of Sciences, Dúbravská cesta 9, SK-840 05 Bratislava, Slovakia
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • For correspondence: [email protected]
S. Rybár
2Energy and Geoscience Laboratory at the Geological Institute of Slovak Academy of Sciences, Dúbravská cesta 9, SK-840 05 Bratislava, Slovakia
3Department of Geology and Palaeontology, Comenius University, Mlynská dolina G, Bratislava 842 15, Slovakia
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
M. Odegard
4Grizzly Geosciences, 5680 Highway 6, Suite 395, Missouri City, TX 77459, USA
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
W. Dickson
5Dickson International Geosciences, 10260 Westheimer Road, Suite 320, Houston, TX 77042-3110, USA
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
O. Pelech
2Energy and Geoscience Laboratory at the Geological Institute of Slovak Academy of Sciences, Dúbravská cesta 9, SK-840 05 Bratislava, Slovakia
3Department of Geology and Palaeontology, Comenius University, Mlynská dolina G, Bratislava 842 15, Slovakia
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
L. Ledvényiová
2Energy and Geoscience Laboratory at the Geological Institute of Slovak Academy of Sciences, Dúbravská cesta 9, SK-840 05 Bratislava, Slovakia
3Department of Geology and Palaeontology, Comenius University, Mlynská dolina G, Bratislava 842 15, Slovakia
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
M. Matejová
2Energy and Geoscience Laboratory at the Geological Institute of Slovak Academy of Sciences, Dúbravská cesta 9, SK-840 05 Bratislava, Slovakia
3Department of Geology and Palaeontology, Comenius University, Mlynská dolina G, Bratislava 842 15, Slovakia
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
M. Molčan
2Energy and Geoscience Laboratory at the Geological Institute of Slovak Academy of Sciences, Dúbravská cesta 9, SK-840 05 Bratislava, Slovakia
6Department of Geological Sciences, Masaryk University, Kotlářská 2, Brno 611 37, Czech Republic
  • Find this author on Google Scholar
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  • Search for this author on this site
S. Hermeston
7White Rose Energy Ventures, Norfolk House, 31 St James's Square, London SW1Y 4JJ, UK
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  • Search for this author on this site
D. Jones
8CGX Energy Inc., 16360 Park 10 Place, Houston, TX 77084, USA
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E. Cuervo
8CGX Energy Inc., 16360 Park 10 Place, Houston, TX 77084, USA
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R. Cheng
8CGX Energy Inc., 16360 Park 10 Place, Houston, TX 77084, USA
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G. Forero
8CGX Energy Inc., 16360 Park 10 Place, Houston, TX 77084, USA
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Development history of the southern terminus of the Central Atlantic; Guyana–Suriname case study

M. Nemčok, S. Rybár, M. Odegard, W. Dickson, O. Pelech, L. Ledvényiová, M. Matejová, M. Molčan, S. Hermeston, D. Jones, E. Cuervo, R. Cheng and G. Forero
Geological Society, London, Special Publications, 431, 145-178, 14 December 2015, https://doi.org/10.1144/SP431.10
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