编号：CDUT-2021-57

标题：Cracking the superheavy pyrite enigma: possible roles of volatile organosulfur compound emission

入藏号：WOS:000720750500008

中国科学院文献情报中心期刊分区（升级版）：综合性期刊1区/TOP

本校作者：郎咸国；Li, Songzhuo

来源出版物：NATIONAL SCIENCE REVIEW 卷：8  期：10  文献号：nwab034

出版年：2021年

第一单位：成都理工大学油气藏地质及开发工程国家重点实验室

关键词： sulfur isotope；organosulfur compound；sulfur cycle；Cryogenian；Datangpo Formation

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摘要：The global deposition of superheavy pyrite (pyrite isotopically heavier than coeval seawater sulfate in the Neoproterozoic Era and particularly in the Cryogenian Period) defies explanation using the canonical marine sulfur cycle system. Here we report petrographic and sulfur isotopic data (delta S-34(py)) of superheavy pyrite from the Cryogenian Datangpo Formation (660-650 Ma) in South China. Our data indicate a syndepositional/early diagenetic origin of the Datangpo superheavy pyrite, with S-34-enriched H2S supplied from sulfidic (H2S rich) seawater. Instructed by a novel sulfur-cycling model, we propose that the emission of S-34-depleted volatile organosulfur compounds (VOSC) that were generated via sulfide methylation may have contributed to the formation of S-34-enriched sulfidic seawater and superheavy pyrite. The global emission of VOSC may be attributed to enhanced organic matter production after the Sturtian glaciation in the context of widespread sulfidic conditions. These findings demonstrate that VOSC cycling is an important component of the sulfur cycle in Proterozoic oceans.

文章链接地址：https://academic.oup.com/nsr/article/8/10/nwab034/6155069