Methane seep in the Shenhu area of the South China sea using geochemical and mineralogical features
文献类型：期刊论文
| 作者 | Zhang, Qinyi2,3; Wu, Daidai3 ; Jin, Guangrong3; Xu, Xing1; Yang, Chao3; Liu, Lihua3
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| 刊名 | MARINE AND PETROLEUM GEOLOGY
 |
| 出版日期 | 2022-10-01 |
| 卷号 | 144页码:13 |
| 关键词 | Anaerobic oxidation of methane Sulfate -methane transition zone Elemental sulfur Morphology of euhedral pyrite crystals Northern south China Sea |
| ISSN号 | 0264-8172 |
| DOI | 10.1016/j.marpetgeo.2022.105829 |
| 通讯作者 | Wu, Daidai(wudd@ms.giec.ac.cn) |
| 英文摘要 | Extensive studies on methane seeps have facilitated the exploration of potential gas hydrates and have revealed biogeochemical processes on the seafloor. In this study, a short core, GG00, was collected from the Shenhu area, South China Sea. By combining various geochemical and mineralogical methods-including planktonic fora-miniferal AMS14C dating, as well as their carbon and oxygen isotopes, chromium-reducible sulfur (CRS) content and delta S-34 values, and hand-picked pyrite and other minerals, we identified a methane seeps that has been stable since the end of the Last Glacial Period. Extremely negative values of delta S-34 for CRS (as low as-49.7 parts per thousand) indicated that only organoclastic sulfate reduction and its coupled sulfur intermediate disproportionation were present in the shallow sediments (from 0 to 209 cmbsf). Conversely, the increasing TS and Mo content and the progressively more positive delta S-34 values (up to-34.76 parts per thousand) of the CRS indicated enhanced sulfate reduction coupled with the anaerobic oxidation of methane (SR-AOM) in deeper sediments (between 209 and 370 cmbsf). In addition, a large number of hypautomorphic-euhedral elemental sulfur (ES) microcrystals was found at 237 cmbsf using scanning electron microscopy, and energy-dispersive X-ray spectroscopy identified the upper edge of the sul-fate-methane transition zone (SMTZ), which was close to the position that was determined from other data (e.g., major and trace elements as well as CRS and its delta S-34 value). The construction of a stratigraphic framework based on planktonic foraminiferal AMS(14)C dating and carbon and oxygen isotopes, combined with the large number of framboid pyrites consisting of cubic microcrystals found further below the SMTZ, suggests that this SMTZ has been relatively stable since the end of the Last Glacial Period. In addition, discrepancies in the aggregation morphology of cubic pyrite at different intervals are indicative of variations in Fe and S supply and growth space. Therefore, this study demonstrates the significance of detailed geochemical and mineralogical signatures in revealing the correlation between methane seep and climate. |
| WOS关键词 | CONTINENTAL-MARGIN SEDIMENTS ; SULFUR ISOTOPE CONSTRAINTS ; DRIVEN ANAEROBIC OXIDATION ; 125 DEGREES-C ; PYRITE FORMATION ; COLD-SEEP ; SULFATE REDUCTION ; DEEP-WATER ; AUTHIGENIC PYRITE ; SURFACE SEDIMENTS |
| 资助项目 | Guangdong Basic and Applied Basic Research Fund Project[2021A1515011509] ; Municipal Science and Technology Program of Guangzhou[201904010311] ; Special Project for Marine Economy Development of Guangdong Province[GDME- 2018D002] ; Guangdong Special Support Program[2019BT02L278] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000840730200001 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | Guangdong Basic and Applied Basic Research Fund Project ; Municipal Science and Technology Program of Guangzhou ; Special Project for Marine Economy Development of Guangdong Province ; Guangdong Special Support Program |
| 源URL | [http://ir.giec.ac.cn/handle/344007/37108]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Wu, Daidai |
| 作者单位 | 1.China Geol Survey, Minist Nat Resources, Guangzhou Marine Geol Survey, Guangzhou 510075, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Qinyi,Wu, Daidai,Jin, Guangrong,et al. Methane seep in the Shenhu area of the South China sea using geochemical and mineralogical features[J]. MARINE AND PETROLEUM GEOLOGY,2022,144:13. |
| APA | Zhang, Qinyi,Wu, Daidai,Jin, Guangrong,Xu, Xing,Yang, Chao,&Liu, Lihua.(2022).Methane seep in the Shenhu area of the South China sea using geochemical and mineralogical features.MARINE AND PETROLEUM GEOLOGY,144,13. |
| MLA | Zhang, Qinyi,et al."Methane seep in the Shenhu area of the South China sea using geochemical and mineralogical features".MARINE AND PETROLEUM GEOLOGY 144(2022):13. |
入库方式： OAI收割
来源：广州能源研究所
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