Journal
GLOBAL AND PLANETARY CHANGE
Volume 105, Issue -, Pages 68-78Publisher
ELSEVIER
DOI: 10.1016/j.gloplacha.2012.12.006
Keywords
mass extinction; Panthalassa; pelagic deep sea; Permian; Triassic; sulfur isotope; Japan; New Zealand
Funding
- Japan Society for the Promotion of Science
- Tohoku University International Advanced Research and Education Organization
- Grants-in-Aid for Scientific Research [25247084, 24403013, 23540528] Funding Source: KAKEN
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Mesozoic accretionary complexes in Japan and New Zealand contain Panthalassic low latitude and southern mid-latitude deep-water sedimentary rock respectively. These sedimentary rocks record environmental changes in the pelagic Panthalassic Ocean during the transition associated with the severe Permian-Triassic mass extinction. This study presents sulfur isotope records of sulfide from continuous deep-sea Permian-Triassic boundary sections located in northeast Japan (the Akkamori section-2, the most continuous section among other previously reported deep-sea sections) and North Island of New Zealand (the Waiheke-1 section, providing the first sulfur isotopic record from a southern hemisphere deep-sea section). Both sections show sharp similar to 15 parts per thousand drops of the sulfur isotope ratio coupled with a negative shift of organic carbon isotope ratio. Similar decreases in sulfur isotope ratio of carbonate-associated sulfates by similar to 10 parts per thousand accompanied with a negative shift of inorganic carbon isotope ratio at the end-Permian mass extinction horizon have been reported in some shallow water Paleotethyan sections. These sulfur isotope changes suggest that a massive release of S-32-enriched sulfur from the H2S-rich water to the oxic surface-waters coincided with the end-Permian mass extinction. (C) 2013 Elsevier B.V. All rights reserved.
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