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Sea-level and salinity fluctuations during the Palaeocene-Eocene thermal maximum Arctic Spitsbergen

Sea-level and salinity fluctuations during the Palaeocene-Eocene thermal maximum Arctic Spitsbergen
Sea-level and salinity fluctuations during the Palaeocene-Eocene thermal maximum Arctic Spitsbergen
Palaeoenvironmental manifestations of the Palaeocene-Eocene thermal maximum (PETM; ~56 Ma) are relatively well documented in low- to mid-latitude settings and at high southern latitudes, but no documented high northern latitude sites record the entire hyperthermal event. We present high-resolution multi-proxy records from a PETM succession on Spitsbergen in the high Arctic (palaeolatitude ~75°N). By comparing our results with those from Integrated Ocean Drilling Program Site 302-4A, we document regional palaeoenvironmental variations in the expression of the PETM, with evidence for major differences in basin-margin vegetation and water column oxygen depletion. Sedimentological, palynological and geochemical data demonstrate a pre-PETM sea level rise in Spitsbergen before the -delta13CTOC excursion, which culminated in maximum flooding during the peak of the event. The appearance of the dinoflagellate cyst Apectodinium before the onset of the carbon isotope excursion (CIE) corroborates environmental change in the Arctic had begun prior to the CIE. Sedimentological and palynological evidence indicate that elevated terrestrial runoff resulted in water column stratification, providing further evidence for an intensification of the hydrological cycle during the PETM.
0012-821X
97-107
Harding, Ian C.
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Charles, Adam J.
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Marshall, John E.A.
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Pälike, Heiko
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Roberts, Andrew P.
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Wilson, Paul A.
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Jarvis, Edward
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Thorne, Robert
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Morris, Emily
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Moremon, Rebecca
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Pearce, Richard B.
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Akbari, Shir
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Harding, Ian C.
5d63b829-a9a7-447f-aa3f-62e8d0e715cb
Charles, Adam J.
dfed4bbd-ea2a-4ff9-81f5-de2af563943b
Marshall, John E.A.
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Pälike, Heiko
b9bf7798-ad8c-479b-8487-dd9a30a61fa5
Roberts, Andrew P.
4f062491-5408-4edb-8dd1-140c6a42e93f
Wilson, Paul A.
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Jarvis, Edward
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Thorne, Robert
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Morris, Emily
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Moremon, Rebecca
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Pearce, Richard B.
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Akbari, Shir
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Harding, Ian C., Charles, Adam J., Marshall, John E.A., Pälike, Heiko, Roberts, Andrew P., Wilson, Paul A., Jarvis, Edward, Thorne, Robert, Morris, Emily, Moremon, Rebecca, Pearce, Richard B. and Akbari, Shir (2011) Sea-level and salinity fluctuations during the Palaeocene-Eocene thermal maximum Arctic Spitsbergen. Earth and Planetary Science Letters, 303 (1-2), 97-107. (doi:10.1016/j.epsl.2010.12.043).

Record type: Article

Abstract

Palaeoenvironmental manifestations of the Palaeocene-Eocene thermal maximum (PETM; ~56 Ma) are relatively well documented in low- to mid-latitude settings and at high southern latitudes, but no documented high northern latitude sites record the entire hyperthermal event. We present high-resolution multi-proxy records from a PETM succession on Spitsbergen in the high Arctic (palaeolatitude ~75°N). By comparing our results with those from Integrated Ocean Drilling Program Site 302-4A, we document regional palaeoenvironmental variations in the expression of the PETM, with evidence for major differences in basin-margin vegetation and water column oxygen depletion. Sedimentological, palynological and geochemical data demonstrate a pre-PETM sea level rise in Spitsbergen before the -delta13CTOC excursion, which culminated in maximum flooding during the peak of the event. The appearance of the dinoflagellate cyst Apectodinium before the onset of the carbon isotope excursion (CIE) corroborates environmental change in the Arctic had begun prior to the CIE. Sedimentological and palynological evidence indicate that elevated terrestrial runoff resulted in water column stratification, providing further evidence for an intensification of the hydrological cycle during the PETM.

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Accepted/In Press date: January 2011
Published date: 15 February 2011
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 169993
URI: http://eprints.soton.ac.uk/id/eprint/169993
ISSN: 0012-821X
PURE UUID: 94b264b8-8fe0-415f-9748-f07a589eb189
ORCID for Ian C. Harding: ORCID iD orcid.org/0000-0003-4281-0581
ORCID for John E.A. Marshall: ORCID iD orcid.org/0000-0002-9242-3646

Catalogue record

Date deposited: 04 Jan 2011 15:04
Last modified: 20 Nov 2021 02:34

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Contributors

Author: Ian C. Harding ORCID iD
Author: Adam J. Charles
Author: Heiko Pälike
Author: Andrew P. Roberts
Author: Paul A. Wilson
Author: Edward Jarvis
Author: Robert Thorne
Author: Emily Morris
Author: Rebecca Moremon
Author: Shir Akbari

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