Frequent euxinia in southern Neo-Tethys Ocean prior to the end-Permian biocrisis: Evidence from the Spiti region, India
Frequent euxinia in southern Neo-Tethys Ocean prior to the end-Permian biocrisis: Evidence from the Spiti region, India
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二叠纪末生物危机之前,新特提斯洋南部频繁出现赤潮:来自印度斯皮蒂地区的证据
DOI:
10.1016/j.palaeo.2018.11.030
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Hannigan, Robyn
中科院分区:
文献类型:
--
作者:
Stebbins, Alan;Williams, Jeremy;Brookfield, Michael;Nye, Steven W.;Hannigan, Robyn
In this study, we reconstruct water-column oxygen availability during the deposition of Late Permian shales (Wuchiapingian to approximately early Changhsingian) using the geochemistry and morphology of sedimentary pyrite (FeS2). Deposition of the shales occurred prior to the end-Permian mass extinction within the southern Neo-Tethys Ocean (Spiti region, Himachal Pradesh, India). We found that the variability of pyritic sulfur to organic carbon (Spyr/Corg) and the pyritic sulfur isotopic composition (δ34Spyr) did not record changes in oxygen availability at Spiti sections. This was due to the removal of original pyritic sulfur by modern oxidative weathering and diagenetic pyrite formation which overwhelmed the original δ34Spyrvalues. However, pyrite framboid size distributions was a reliable recorder of paleoredox conditions. The degree of oxygen limitation varied with multiple transient euxinic events interrupting a predominantly oxic-dysoxic trend near the top of the Gungri Formation upper member (approximately late Wuchiapingian to early Changhsingian). These transient euxinic intervals provide important insight and regional evidence of environmental stress and instability in the southern Neo-Tethys well prior to the end-Permian mass extinction.
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影响因子:
6.1
作者:
Martin Schobben;M. Joachimski;D. Korn;L. Leda;C. Korte
通讯作者:
Martin Schobben;M. Joachimski;D. Korn;L. Leda;C. Korte
影响因子:
5.8
作者:
Joachimski, Michael M.;Lai, Xulong;Sun, Yadong
通讯作者:
Sun, Yadong
DOI:
--
发表时间:
1985
期刊:
影响因子:
--
作者:
O. Bhargava;R. N. Srivastava;S. Gadhoke
通讯作者:
S. Gadhoke
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
J. Williams
通讯作者:
J. Williams
DOI:
10.1073/pnas.1503755112
发表时间:
2015-08
期刊:
Proceedings of the National Academy of Sciences
影响因子:
--
作者:
Martin Schobben;A. Stebbins;A. Ghaderi;H. Strauss;D. Korn;C. Korte
通讯作者:
Martin Schobben;A. Stebbins;A. Ghaderi;H. Strauss;D. Korn;C. Korte