Polygonal mounds in the Barents Sea reveal sustained organic productivity towards the P-T boundary

Alves, Tiago Marcos ORCID: https://orcid.org/0000-0002-2765-3760 2016. Polygonal mounds in the Barents Sea reveal sustained organic productivity towards the P-T boundary. Terra Nova 28 (1) , pp. 50-59. 10.1111/ter.12190

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Abstract

Three-dimensional (3D) seismic-reflection data from the Barents Sea show geometric similarities between Permian cool-water mounds and older carbonate build-ups. In detail, the Samson Dome area records the development of polygonal mounds in Upper Permian strata, at the same time a gradual drowning event took place in the Barents Sea. The presence of these polygonal mounds is interpreted to reflect: i) shallower conditions around the Samson Dome when compared to other parts of the Barents Sea; ii) earlier drowning of Upper Permian mounds towards the west and northwest into the Ottar Basin. Based on the recognition of mounds ~20 metres below the PermianTriassic stratigraphic boundary, this paper proposes for the first time that shallow areas of the Barents Sea, such as the Samson Dome, witnessed sustained organic productivity until the onset of the P-T extinction event.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences
Subjects:	Q Science > QE Geology
Uncontrolled Keywords:	Pangaea; Barents Sea; carbonate build-ups; Upper Permian mounds; P-T boundary.
Additional Information:	Article first published online: 27 DEC 2015 Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0954-4879/ (accessed 10/03/2016)
Publisher:	Wiley-Blackwell
ISSN:	1365-3121
Date of First Compliant Deposit:	30 March 2016
Date of Acceptance:	10 November 2015
Last Modified:	07 Nov 2023 06:45
URI:	https://orca.cardiff.ac.uk/id/eprint/81014

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