Heavy Li isotopic compositions of the terminal Ediacaran dolostones in the Tarim Basin and their possible link to dolomitizations
文献类型：期刊论文
| 作者 | Zhang, Yinggang4,5; Yang, Tao1,5 ; Yang, Liu Willow5; Chen, Yongquan3; Pan, Wenqing3; Su, Pibo1,2
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| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 163页码:8 |
| ISSN号 | 0169-1368 |
| 关键词 | Lithium isotopes Dolostone Dolomitization Silicate Weathering Terminal Ediacaran |
| DOI | 10.1016/j.oregeorev.2023.105802 |
| 通讯作者 | Yang, Tao(yangtao@nju.edu.cn) ; Su, Pibo(spb_525@sina.com) |
| 英文摘要 | Dolostones are promising archives for recording paleo-seawater Li isotope compositions, and are especially important for the Cambrian and Precambrian periods when limestones are scarce. However, the effect of dolomitization on carbonate Li isotopes is unclear, limiting their application in tracking (Pre-)Cambrian seawater Li isotopes. Research on Li isotopes in dolostone sections may resolve this issue. We present the Li isotope compositions of dolostones from the terminal Ediacaran Chigebrak Formation (NW Tarim Basin). The dolostone Li isotopes are-17 +/- 5 %o heavier than contemporaneous seawater, indicating significant Li isotope fractionations during dolomite formation. Given that the formation of clay minerals may enrich the porewater with heavier Li isotopes and promote the dolomite formation, we argue that the claycatalyzed dolomite formation would probably result in heavier Li isotope compositions of dolomites. Moreover, assuming a fixed fractionation factor (-15 %o) for the clay-catalyzed dolomitizations, we obtain the seawater delta 7Li variations in the terminal Ediacaran, which show similar declining trends with the carbonate 87Sr/86Sr record. Using a simple ocean Li-Sr box model, we propose a reduced weathering scenario during the terminal Ediacaran (-549 Ma) to explain the seawater Li-Sr isotope covariations. Our study suggests considerable fractionations of Li isotopes (-17 +/- 5 %o) during clay-catalyzed dolomite formation and a reduced-weathering scenario during the terminal Ediacaran. This large Li isotope fractionation factor indicates the Li isotope fractionation factors during dolomitizations may vary widely and should be considered based on the type of dolomitization. More comparative studies on Li isotopes among coeval carbonates are expected to further explore the potential of dolostones in recording paleo-seawater Li isotopes. |
| WOS关键词 | CHINA IMPLICATIONS ; LITHIUM ISOTOPES ; C-ISOTOPE ; DOLOMITE ; CARBON ; AREA ; TEMPERATURE ; EVOLUTION ; STRONTIUM ; SILICATE |
| 资助项目 | National Key Research and Development Program of China[2022YFF0800100] ; National Natural Science Foundation of China[41921002] ; National Science and Technology Major Project[2016ZX05004-004] ; China Postdoctoral Science Foundation[2023M733592] ; Jiangsu Funding Program for Excellent Postdoctoral Talent |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001128178300001 |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Science and Technology Major Project ; China Postdoctoral Science Foundation ; Jiangsu Funding Program for Excellent Postdoctoral Talent |
| 源URL | [http://ir.nigpas.ac.cn/handle/332004/42820]  |
| 专题 | 中国科学院南京地质古生物研究所 |
| 通讯作者 | Yang, Tao; Su, Pibo |
| 作者单位 | 1.Nanjing Univ, Xianlin Campus,163 Xianlin Ave, Nanjing 210046, Peoples R China 2.Guangzhou Marine Geol Survey, Sanya Inst South China Sea Geol, Sanya, Peoples R China 3.PetroChina, Petr Explorat & Dev Inst, Tarim Oil Field Co, Korla, Peoples R China 4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China 5.Nanjing Univ, State Key Lab Mineral Deposits Res, Nanjing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yinggang,Yang, Tao,Yang, Liu Willow,et al. Heavy Li isotopic compositions of the terminal Ediacaran dolostones in the Tarim Basin and their possible link to dolomitizations[J]. ORE GEOLOGY REVIEWS,2023,163:8. |
| APA | Zhang, Yinggang,Yang, Tao,Yang, Liu Willow,Chen, Yongquan,Pan, Wenqing,&Su, Pibo.(2023).Heavy Li isotopic compositions of the terminal Ediacaran dolostones in the Tarim Basin and their possible link to dolomitizations.ORE GEOLOGY REVIEWS,163,8. |
| MLA | Zhang, Yinggang,et al."Heavy Li isotopic compositions of the terminal Ediacaran dolostones in the Tarim Basin and their possible link to dolomitizations".ORE GEOLOGY REVIEWS 163(2023):8. |
入库方式： OAI收割
来源：南京地质古生物研究所
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