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Saline fluids drive Cu mineralization in Precambrian metasediments: Evidence from the Trans-North China Orogen

文献类型：期刊论文

作者Qiu, Zheng-Jie1,6; Fan, Hong-Rui1,5,6; Santosh, M.3,4; Yang, Kui-Feng1,5,6; Li, Xiao-Chun1,5,6; Lan, Ting-Guang2,5; Tang, Yan-Wen2; Pan, Yong-Xin5,6
刊名ORE GEOLOGY REVIEWS
出版日期2021-12-01
卷号139页码:15
关键词Epigenetic hydrothermal Cu deposit LA-ICP-MS fluid inclusion analysis Metamorphic brine Trans-North China Orogen
ISSN号0169-1368
DOI10.1016/j.oregeorev.2021.104462
英文摘要Epigenetic hydrothermal Cu-(Co) deposits are widely distributed in the Zhongtiao Mountains within the Paleoproterozoic Trans-North China Orogen in the North China Craton. Here we investigate the Henglingguan Cu deposit hosted in metasediments to gain insights on the fluid evolution characteristics associated with the ore formation. This Cu deposit is characterized by early disseminated mineralization and late quartz-vein type mineralization. The negative sulfur isotope values (about -10 parts per thousand) of the vein sulfides suggests a sedimentary rock source for sulfur associated with the hydrothermal Cu mineralization. The coexistence of CO2-rich carbonic inclusions and halite-bearing inclusions within a single fluid inclusion assemblage suggests fluid immiscibility in the H2O-NaCl-CO2 system. Based on the fluid phase analysis, our data show that the parent ore fluid was characterized by X(NaCl) of 10 to 20 mol.% (salinity of around 23 to 41 wt% NaCl) and X(CO2) of 10 to 15 mol.% before fluid immiscibility. The estimated temperature-pressure conditions of 320 to 340 degrees C and 3.5 to 4.0 kbar based on the carbonic fluid inclusions is suggested to be close to the conditions of fluid immiscibility. In-situ composition analyses of fluid inclusions by LA-ICP-MS show that the ore fluids contained Na, Ca, Fe and Mn, and evolved towards Sr-Ba enrichment. The data are consistent with a metamorphic brine derived from the sedimentary rocks. The brine-rich metamorphic fluids were likely derived from the dehydration and decarbonation of evaporitic carbonate rocks developed on the basin margin or a passive continental margin. The decompression during post-collisional exhumation triggered fluid immiscibility resulting in the quartz vein-type Cu mineralization.
WOS关键词LA-ICP-MS ; ZHONGTIAO MOUNTAINS ; INCLUSION DATA ; GOLD DEPOSITS ; METAMORPHIC DEVOLATILIZATION ; CRATON IMPLICATIONS ; NATURAL PROCESSES ; PHASE-EQUILIBRIA ; SECULAR CHANGES ; TRACE-ELEMENTS
资助项目National Nature Science Foundation of China[41890833] ; National Nature Science Foundation of China[41902080]
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000706417200001
出版者ELSEVIER
资助机构National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/102985]  
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Fan, Hong-Rui
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Peoples R China
3.Univ Adelaide, Dept Earth Sci, Adelaide, SA 5005, Australia
4.China Univ Geosci Beijing, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Qiu, Zheng-Jie,Fan, Hong-Rui,Santosh, M.,et al. Saline fluids drive Cu mineralization in Precambrian metasediments: Evidence from the Trans-North China Orogen[J]. ORE GEOLOGY REVIEWS,2021,139:15.
APA Qiu, Zheng-Jie.,Fan, Hong-Rui.,Santosh, M..,Yang, Kui-Feng.,Li, Xiao-Chun.,...&Pan, Yong-Xin.(2021).Saline fluids drive Cu mineralization in Precambrian metasediments: Evidence from the Trans-North China Orogen.ORE GEOLOGY REVIEWS,139,15.
MLA Qiu, Zheng-Jie,et al."Saline fluids drive Cu mineralization in Precambrian metasediments: Evidence from the Trans-North China Orogen".ORE GEOLOGY REVIEWS 139(2021):15.

入库方式： OAI收割

来源：地质与地球物理研究所

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