Methanogen-mediated dolomite precipitation in an early Permian lake in northwestern China
文献类型：期刊论文
| 作者 | Sun, Funing3,4; Hu, Wenxuan2,4; Wang, Xiaolin2,4; Hu, Zhongya4; Wu, Haiguang1; Guo, Yangrui5; Wei, Gangjian5 |
| 刊名 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 136期号:7-8页码:2637-2645 |
| ISSN号 | 0016-7606 |
| DOI | 10.1130/B37156.1 |
| 英文摘要 | Microbes are known to mediate dolomite precipitation in laboratory experiments; however, the linkage of specific microbes to ancient dolomites remains poorly constrained due to scarce diagnostic biogeochemical signatures and mineralized microbial relics in the rock record. Here, we report the occurrence of methanogen-mediated dolomite in the Lower Permian lacustrine Lucaogou Formation in northwestern China. The clumped isotope (Delta(47 )) temperature provides direct evidence of a low-temperature origin (typically <40 degrees C). The extremely positive delta Mg-26 ( DSM3) (up to +0.44%0) and delta C-13 ( VPDB) (up to +19%0) values in the dolomite indicate authigenic precipitation in methanogenic lake sediments. Micron-sized spheroidal bodies and filamentous and sheetlike structures are interpreted as mineralized coccoid methanogenic archaea and extracellular polymeric substances (EPSs), respectively. Dolomite nanoglobules (primarily 40-100 nm in diameter) are interpreted as mineralized viruses attached to the archaea and EPSs and between the cells. A combination of geochemical and microscale evidence confirms the microbial origin of the dolomite induced by methanogens and their associated bacteriophages. Furthermore, dolomite nanoglobules initially nucleated on the surfaces of methanogen cells, EPSs, and viruses and then merged into larger aggregates. The formation of microbial dolomite is characterized by a metabolic incubation, heterogeneous nucleation, and aggregative growth pathway. These findings provide valuable clues to decipher the biosignatures of these particular ancient dolomites. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001271970100001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/72339]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Hu, Wenxuan |
| 作者单位 | 1.Northeast Petr Univ, Sch Earth Sci, Daqing 163318, Peoples R China 2.Nanjing Univ, Frontiers Sci Ctr Crit Earth Mat Cycling, Nanjing 210023, Peoples R China 3.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China 4.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Peoples R China 5.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Funing,Hu, Wenxuan,Wang, Xiaolin,et al. Methanogen-mediated dolomite precipitation in an early Permian lake in northwestern China[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2024,136(7-8):2637-2645. |
| APA | Sun, Funing.,Hu, Wenxuan.,Wang, Xiaolin.,Hu, Zhongya.,Wu, Haiguang.,...&Wei, Gangjian.(2024).Methanogen-mediated dolomite precipitation in an early Permian lake in northwestern China.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,136(7-8),2637-2645. |
| MLA | Sun, Funing,et al."Methanogen-mediated dolomite precipitation in an early Permian lake in northwestern China".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 136.7-8(2024):2637-2645. |
入库方式： OAI收割
来源：广州地球化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。