Sulfur isotope profiles in the pelagic Panthalassic deep sea during the Permian―Triassic transition
Sulfur isotope profiles in the pelagic Panthalassic deep sea during the Permian―Triassic transition
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DOI：
10.1016/j.gloplacha.2012.12.006
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发表时间：
2013-06
影响因子：
3.9
通讯作者：
Gorjan Paul;Sporli K. Bernhard;S. Takahashi;K. Kaiho;R. Hori;P. Gorjan;Takahiro Watanabe;S. Yamakita;Y. Aita;Atsushi;Takemura;Bernhard Sporli;T. Kakegawa;M. Oba
中科院分区：
文献类型：
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作者：
Gorjan Paul;Sporli K. Bernhard;S. Takahashi;K. Kaiho;R. Hori;P. Gorjan;Takahiro Watanabe;S. Yamakita;Y. Aita;Atsushi;Takemura;Bernhard Sporli;T. Kakegawa;M. Oba
日本和新西兰中生代增生杂岩分别为低纬的泛海期和中纬南部的深水沉积岩。这些沉积岩记录了与二叠纪-三叠纪生物大灭绝有关的过渡时期泛海洋环境的变化。本研究提供了硫化物的硫同位素记录，从连续的深海二叠-三叠系边界部分位于日本东北部（Akkamori部分-2，最连续的部分在其他先前报道的深海部分）和新西兰北岛（Waiheke-1部分，提供了第一个硫同位素记录从南半球深海部分）。两个剖面都显示硫同位素比值急剧下降~15‰，同时有机碳同位素比值负移。在一些浅水古特提斯剖面中，碳酸盐相关硫酸盐的硫同位素比值也出现了类似的降低，降低幅度约为10‰，并伴随着无机碳同位素比值的负移。这些硫同位素的变化表明，大量释放的32 S-富集硫从H2S丰富的水到含氧的地表水正好与二叠纪末的大规模灭绝。
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 ~15‰ 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 ~10‰ 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 of32S-enriched sulfur from the H2S-rich water to the oxic surface-waters coincided with the end-Permian mass extinction.