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Geological and geochemical constraints on the origin of the Early Cambrian Kalaizi Fe-Ba deposit in Western Kunlun, NW China
Zheng, Mengtian1,2; Wang, Changle1; Zhang, Lianchang1; Shi, Zongbo3; Zhu, Mingtian1; Li, Zhiquan1; He, Lidong4
2018-09-01
发表期刊ORE GEOLOGY REVIEWS
ISSN0169-1368
卷号100页码:347-359
摘要The Kalaizi deposit in the Bulunkuole Group of Taxkorgan area, Western Kunlun (NW China) is a unique regional Fe-Ba deposit accompanied with sporadic Fe-Pb-Zn sulfide mineralization within a series of iron deposits. All the ore bodies are stratabound and hosted by the Early Cambrian metamorphosed argillaceous clastic rocks. Here, we analyzed C-S-O-Sr isotopes and trace elements in individual minerals (e.g., magnetite, barite, ankerite) from the Kalaizi deposit to investigate the origin of this deposit for the first time. The S isotope fractionation (average of 21 parts per thousand) between sulfate and sulfide minerals provided clear evidence that the deposit was formed in a semi-closed marine depositional environment with moderate replenishment of seawater sulfate. The distinct Post-Archean Australian Shale (PAAS)-normalized positive Eu anomalies (2.02-11.03) and lower Y/Ho ratios (27.2-33.4) relative to modern seawater in all individual magnetite minerals separated from magnetite-barite ores and the delta O-18 isotope signatures (10.0-13.0 parts per thousand)) in individual sulfate minerals suggested that hydrothermal activity played an important role in the formation of the deposit. Barium was likely derived from the dissolution of marine barite with a contribution from more radiogenic terrigenous sediments considering the slight deviations (within +/- 0.0013) of Sr-87/Sr-86 ratios of Kalaizi barites from the Early Cambrian seawater. The sulfate and sulfide minerals in the ore deposit should evolve from coeval seawater containing residual SO42- and resultant H2S by means of bacterial sulfate reduction process because (i) delta S-84 values (37.8-42.8 parts per thousand) of anhydrite and barite minerals were slightly higher than those of penecontemporaneous seawater, (ii) pyrite and galena minerals owned delta S-84 values (16.3-23.5 parts per thousand) were lower than coeval seawater, and (iii) C-13 isotope values ( -10.0 to -12.1 parts per thousand) of single ankerite minerals were depleted. To summarize, the Kalaizi bedded Fe-Ba deposit is interpreted as a cold seep barite deposit overprinted by hydrothermal fluids.
关键词Magnetite Barite Hydrothermal fluid Cold seep origin Taxkorgan
DOI10.1016/j.oregeorev.2017.09.025
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China
关键词[WOS]GULF-OF-MEXICO ; RARE-EARTH-ELEMENTS ; STRATIFORM BARITE DEPOSITS ; SOUTH CHINA ; SULFATE REDUCTION ; ISOTOPE FRACTIONATION ; CONTINENTAL-MARGIN ; OXYGEN-ISOTOPES ; SULFUR ISOTOPE ; BIOGEOCHEMICAL PROCESSES
语种英语
资助项目National Natural Science Foundation of China[41372100] ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China[2015BAB05B02]
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
WOS类目Geology ; Mineralogy ; Mining & Mineral Processing
WOS记录号WOS:000446285100022
出版者ELSEVIER SCIENCE BV
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/89179
专题矿产资源研究院重点实验室
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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham, W Midlands, England
4.Xinjiang Bur Geol & Mineral Resources, Geol Party 2, Kashgar 844002, Peoples R China
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Zheng, Mengtian,Wang, Changle,Zhang, Lianchang,et al. Geological and geochemical constraints on the origin of the Early Cambrian Kalaizi Fe-Ba deposit in Western Kunlun, NW China[J]. ORE GEOLOGY REVIEWS,2018,100:347-359.
APA Zheng, Mengtian.,Wang, Changle.,Zhang, Lianchang.,Shi, Zongbo.,Zhu, Mingtian.,...&He, Lidong.(2018).Geological and geochemical constraints on the origin of the Early Cambrian Kalaizi Fe-Ba deposit in Western Kunlun, NW China.ORE GEOLOGY REVIEWS,100,347-359.
MLA Zheng, Mengtian,et al."Geological and geochemical constraints on the origin of the Early Cambrian Kalaizi Fe-Ba deposit in Western Kunlun, NW China".ORE GEOLOGY REVIEWS 100(2018):347-359.
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