Towards deciphering the source of rare earth elements in kerogen: Seawater or diagenetic porewater origin?
文献类型：期刊论文
| 作者 | Zhao, Guanyu1,2,3; Deng, Qian2,3; Fang, Xinyan2,3; Wang, Haozhe1,2,3; Cheng, Bin2,3; Liao, Zewen2,3 |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2023-12-20 |
| 卷号 | 641页码:11 |
| 关键词 | Rare earth elements Kerogen Porewater |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2023.121783 |
| 英文摘要 | The composition of rare earth elements (REEs) in kerogen has long been hypothesized to preserve signatures of shallow seawater, assuming that kerogen primarily originates from biomass inhabiting the shallow photic zone. In this study, we examine the composition of REEs in kerogen samples obtained from the Ediacaran Dongkanshang and Fengtan sections in South China. Through a meticulous screening process, we provide evidence that kerogen samples exhibiting patterns of heavy rare earth element (HREE) enrichment are free from acid-insoluble mineral contamination and preserve unaltered REE signatures. This study reveals that kerogens display low total rare earth element (sigma REE) concentrations. As kerogen samples exhibit higher levels of HREE enrichment, the Ce/ Ce*, Eu/Eu*, and Y/Ho ratios show an upward trend. Moreover, all the kerogen samples exhibit chondritic Y/Ho ratios (with an average of 32). These findings imply that REEs in kerogens are of diagenetic origin and influenced by the ambient redox conditions. Our results suggest that the distribution patterns of REEs in kerogens derive from porewater within methanogenic zones, as opposed to the oxic seawater photic zone. Consequently, the formation of kerogen could potentially occur within a similar domain as the methanogenic zones, where kerogens can assimilate REEs from pore fluids and incorporate them into their macromolecular structures. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001095183200001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/78879]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Deng, Qian; Liao, Zewen |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 3.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Guanyu,Deng, Qian,Fang, Xinyan,et al. Towards deciphering the source of rare earth elements in kerogen: Seawater or diagenetic porewater origin?[J]. CHEMICAL GEOLOGY,2023,641:11. |
| APA | Zhao, Guanyu,Deng, Qian,Fang, Xinyan,Wang, Haozhe,Cheng, Bin,&Liao, Zewen.(2023).Towards deciphering the source of rare earth elements in kerogen: Seawater or diagenetic porewater origin?.CHEMICAL GEOLOGY,641,11. |
| MLA | Zhao, Guanyu,et al."Towards deciphering the source of rare earth elements in kerogen: Seawater or diagenetic porewater origin?".CHEMICAL GEOLOGY 641(2023):11. |
入库方式： OAI收割
来源：广州地球化学研究所
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