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Insight into the genesis of the Zhaosu Carboniferous Mn carbonate deposit (NW China): constraints from petrography, geochemistry, and C-Mo isotopes

文献类型：期刊论文

作者Dong, ZhiGuo1,2,3; Peng, ZiDong1,2; Wang, ChangLe1,2,3; Zhang, BangLu4,5,6; Zhang, LianChang1,2,3; Li, Jie7; Zhang, Xin1,2,3; Li, WenJun1,2; Zhang, Le7
刊名MINERALIUM DEPOSITA
出版日期2022-03-26
页码21
关键词Petrography Geochemistry Mn carbonate Mn deposit Zhaosu NW China
ISSN号0026-4598
DOI10.1007/s00126-022-01105-3
英文摘要The genesis (primary versus secondary) of Mn carbonate-rich sediments, which consist of sub-economic rocks and ore deposits, remains hotly debated. Here, we investigated the petrographic, geochemical, and C-Mo isotopic characteristics of the Zhaosu Mn carbonate deposit in northwestern China, in order to provide constraints on its origin. The Mn ores occur within a Carboniferous marine transgressive siliciclastic-carbonate succession, and are mainly comprised of Mn carbonate minerals with subordinate alabandite. Within the Mn ores, organic matter is commonly replaced by Mn carbonates, coupled with concentric Mn carbonates, suggesting that Mn carbonates formed during diagenesis. This is further supported by their negative delta C-13(VPDB) values (from -2.4 to -10.7 parts per thousand), negative delta Mo-98(NIST+0.25) values (from -0.1 to -3.7 parts per thousand), shale-normalized positive Ce anomalies (up to 1.2), and lower Y/Ho ratios (29-35) relative to seawater (similar to 44). These all indicate that the Zhaosu Mn carbonate ores formed due to original Mn oxide reduction coupled with organic matter degradation during diagenesis. The extremely negative Mo isotopic values (as low as -3.7 parts per thousand) likely resulted from a dual effect of original Mn oxide adsorption and subsequent Mo sequestration within weakly sulfidic pore waters during diagenesis. The ubiquity of alabandite in the Mn ores indicates a significant separation between Mn and Fe, and combined with the country-rock limestones with negative Ce anomalies, we infer that an oxic-suboxic stratified water column might have characterized the Zhaosu basin during Mn deposition. By compiling geochemical and isotopic features of major Mn carbonate-rich sediments in Earth's history, we argue that ancient Mn carbonate-rich sediments, especially economic ore deposits, might result from original Mn oxide reduction during diagenesis and thus are a reliable proxy for oxic oceanic conditions.
WOS关键词NEOPROTEROZOIC PENGANGA GROUP ; RARE-EARTH-ELEMENTS ; SEDIMENTARY-ROCKS ; MANGANESE CARBONATES ; WESTERN TIANSHAN ; LANDSORT DEEP ; EUXINIC SEDIMENTS ; SULFIDE FORMATION ; MARINE-SEDIMENTS ; REDOX CONDITIONS
资助项目National Natural Science Foundation of China[U1703242] ; National Natural Science Foundation of China[42102114] ; National Key Basic Research and Development Program[2018YFC0604001] ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau[2019QZKK0802] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences[ZDBSLY-DQC037] ; China Postdoctoral Science Foundation[2021M703018] ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000773198100001
出版者SPRINGER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research and Development Program ; National Key Basic Research and Development Program ; National Key Basic Research and Development Program ; National Key Basic Research and Development Program ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research and Development Program ; National Key Basic Research and Development Program ; National Key Basic Research and Development Program ; National Key Basic Research and Development Program ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research and Development Program ; National Key Basic Research and Development Program ; National Key Basic Research and Development Program ; National Key Basic Research and Development Program ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Basic Research and Development Program ; National Key Basic Research and Development Program ; National Key Basic Research and Development Program ; National Key Basic Research and Development Program ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Second Comprehensive Scientific Survey of the Qinghai-Tibet Plateau ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/105024]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Wang, ChangLe; Zhang, LianChang
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.China Geol Survey, Dev & Res Ctr, Beijing 100037, Peoples R China
5.China Univ Geosci, Beijing 100083, Peoples R China
6.Mineral Explorat Tech Guidance Ctr, Minist Nat Resources Peoples Republ China, Beijing 100083, Peoples R China
7.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		 Dong, ZhiGuo,Peng, ZiDong,Wang, ChangLe,et al. Insight into the genesis of the Zhaosu Carboniferous Mn carbonate deposit (NW China): constraints from petrography, geochemistry, and C-Mo isotopes[J]. MINERALIUM DEPOSITA,2022:21.
APA Dong, ZhiGuo.,Peng, ZiDong.,Wang, ChangLe.,Zhang, BangLu.,Zhang, LianChang.,...&Zhang, Le.(2022).Insight into the genesis of the Zhaosu Carboniferous Mn carbonate deposit (NW China): constraints from petrography, geochemistry, and C-Mo isotopes.MINERALIUM DEPOSITA,21.
MLA Dong, ZhiGuo,et al."Insight into the genesis of the Zhaosu Carboniferous Mn carbonate deposit (NW China): constraints from petrography, geochemistry, and C-Mo isotopes".MINERALIUM DEPOSITA (2022):21.

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来源：地质与地球物理研究所

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