Hg isotope evidence for oceanic oxygenation during the Cambrian Explosion
文献类型：期刊论文
| 作者 | Fan, Haifeng2,7; Fu, Xuewu2,6; Yang, Ruofei2,7; Wen, Hanjie2,5; Hu, Chunlin4; Ward, Jack F.3; Zhang, Hongjie2,7; Zhang, Hui2,6; Zhang, Xingliang1 |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 362页码:104-114 |
| ISSN号 | 0016-7037 |
| 关键词 | Cambrian explosion Hg isotope Increased oxygen levels |
| DOI | 10.1016/j.gca.2023.10.020 |
| 通讯作者 | Fan, Haifeng(fanhaifeng@mail.gyig.ac.cn) |
| 英文摘要 | The Cambrian explosion is a critical evolutionary milestone in life history, but the mechanistic relationship between the Cambrian explosion, rising atmospheric and oceanic oxygen levels, and the primary productivity remains controversial. Here, we present new mercury (Hg) isotope data from Cambrian marine sediments of the similar to 521-514 Ma Yu'anshan and Shuijingtuo Formations (Nanhua Basin, South China), which preserve the famous similar to 518 Ma Chengjiang and Qingjiang Cambrian Biotas, respectively. We find evidence that, prior to Cambrian animal diversification, local terrestrial and/or atmospheric inputs are important drivers of Hg enrichment in the shallow shelf Yu'anshan and Shuijintuo Formations. Elevated Hg and total organic carbon (TOC) concentrations of coeval deeper shelf and slope sections of the Niutitang Formation are mainly attributed to upwelling of Hg associated with dissolved organic carbon (Hg-DOC) from pelagic seawater, unrelated to locally high primary productivity. During the deposition of fossiliferous strata, negative shifts of Delta Hg-199 and delta Hg-202 values in the shallow water shelf shales from the Shuijingtuo Formation, combined with similar Hg isotope characteristics in the deeper shelf and slope shales, demonstrate a significant shallow and deep-water oxygenation event took place in the Nanhua Basin. A comparable negative shift of Delta Hg-199 values occurs in coeval Indian Craton sediments, suggesting this oxygenation event could be regional, or possibly even global, in scale. Our newly-collected Hg isotope data provide strong evidence that rising molecular oxygen levels in both surface and deep seawater are associated with enhanced marine primary productivity and could be a critical driver of the Cambrian explosion. Finally, we also argue that Hg isotopes are an emerging and promising redox proxy for studies of Precambrian seawater, but the chemical response of Hg to atmospheric and ocean oxygenation requires further calibration. |
| WOS关键词 | SOUTH CHINA ; ANIMAL EVOLUTION ; MERCURY ISOTOPES ; BLACK SHALES ; ELEMENTAL MERCURY ; FRACTIONATION ; OXIDATION ; BIOTA ; ENRICHMENT ; SIGNATURES |
| 资助项目 | NSFC[41890841] ; NSFC[U1812402] ; NSFC[42073016] ; NSFC[92062221] ; NSFC[42121003] ; CAS[ZDBS-LY-DQC029] ; Guizhou Provincial 2020 Science and Technology Subsides[GZ2020SIG] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:001107378200001 |
| 资助机构 | NSFC ; CAS ; Guizhou Provincial 2020 Science and Technology Subsides |
| 源URL | [http://ir.nigpas.ac.cn/handle/332004/43162]  |
| 专题 | 中国科学院南京地质古生物研究所 |
| 通讯作者 | Fan, Haifeng |
| 作者单位 | 1.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Shaanxi Key Lab Early Life & Environm, Xian 710069, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Queensland, Sch Environm, Brisbane, Qld 4072, Australia 4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 5.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Peoples R China 6.Chinese Acad Sci, State Key Lab Environm Geochem, Inst Geochem, Guiyang 550081, Peoples R China 7.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Haifeng,Fu, Xuewu,Yang, Ruofei,et al. Hg isotope evidence for oceanic oxygenation during the Cambrian Explosion[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2023,362:104-114. |
| APA | Fan, Haifeng.,Fu, Xuewu.,Yang, Ruofei.,Wen, Hanjie.,Hu, Chunlin.,...&Zhang, Xingliang.(2023).Hg isotope evidence for oceanic oxygenation during the Cambrian Explosion.GEOCHIMICA ET COSMOCHIMICA ACTA,362,104-114. |
| MLA | Fan, Haifeng,et al."Hg isotope evidence for oceanic oxygenation during the Cambrian Explosion".GEOCHIMICA ET COSMOCHIMICA ACTA 362(2023):104-114. |
入库方式： OAI收割
来源：南京地质古生物研究所
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