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Copper Sulfide Remobilization and Mineralization during Paleoproterozoic Retrograde Metamorphism in the Tongkuangyu Copper Deposit, North China Craton

文献类型：期刊论文

作者Liu, Xuan1,2,3; Yang, Kuifeng1; Rusk, Brian2; Qiu, Zhengjie1; Hu, Fangfang1; Pironon, Jacques3
刊名MINERALS
出版日期2019-07-01
卷号9期号:7页码:27
关键词Tongkuangyu copper deposit metamorphic fluids Pb-Pb isochron H-O isotopes He-Ar isotopes
ISSN号2075-163X
DOI10.3390/min9070443
英文摘要The Tongkuangyu copper deposit, North China Craton, is hosted in a volcano-sedimentary sequence (ca. 2.2 Ga) that metamorphosed to the lower amphibolite facies at ca. 1.9 Ga. Petrographic observations revealed various metamorphic fabrics (mineral alignment and foliations) and several generations of biotite, chlorite, and pyrite. Sulfide Pb-Pb dating indicates that copper mineralization occurred at 1960+46/-58 Ma, younger than the zircon U-Pb age of the host metatuff (2180 Ma to 2190 Ma), but close to the timing of regional metamorphism (ca. 1.9 Ga). Electron probe analyses show that the biotites belong to the magnesium-rich variety, and were formed at 470 to 500 degrees C based on Ti-in-biotite thermometry. Chlorites belong to ripidolite and pycnochlorite, and were formed at ca. 350 degrees C based on the Al geothermometer. Pyrites in porphyry, metatuffs, and quartz veins have contrasting Ni and Co concentrations, pointing to a local remobilization. Hydrogen and oxygen isotopic analyses suggest that biotite and chlorite were formed by metamorphic waters whereas quartz records much lower delta Dfluid values, reflecting the influence of meteoric water. Fluid inclusions in pyrite and chalcopyrite in metatuff and quartz vein contain extremely radiogenic 4He and 40Ar, indicating a crustal origin for the fluids. Sulfides show a magmatic sulfur isotopic signature, likely indicating the presence of preexisting volcanism-related sulfides. We proposed that the early layered copper sulfides formed during metamorphic retrogression at ca. 1.9 Ga and the late vein-type sulfides were derived from the remobilization of the earlier sulfides by infiltration of external fluids such as residual seawater and metamorphic fluids at shallow level.
WOS关键词ZHONGTIAOSHAN REGION EVIDENCE ; HUJIAYU CU DEPOSIT ; U-PB ; FLUID INCLUSIONS ; OXYGEN-ISOTOPE ; YUNNAN PROVINCE ; EVOLUTION ; ORIGIN ; ZIRCON ; HF
资助项目National Science Foundation of China[41402083] ; National Science Foundation of China[41890833] ; National Science Foundation of China[41602073] ; China Scholarship Council (a visiting-scholar fellowship)
WOS研究方向Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000478593300031
出版者MDPI
资助机构National Science Foundation of China ; National Science Foundation of China ; China Scholarship Council (a visiting-scholar fellowship) ; China Scholarship Council (a visiting-scholar fellowship) ; National Science Foundation of China ; National Science Foundation of China ; China Scholarship Council (a visiting-scholar fellowship) ; China Scholarship Council (a visiting-scholar fellowship) ; National Science Foundation of China ; National Science Foundation of China ; China Scholarship Council (a visiting-scholar fellowship) ; China Scholarship Council (a visiting-scholar fellowship) ; National Science Foundation of China ; National Science Foundation of China ; China Scholarship Council (a visiting-scholar fellowship) ; China Scholarship Council (a visiting-scholar fellowship)
源URL[http://ir.iggcas.ac.cn/handle/132A11/93337]  
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Liu, Xuan
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Western Washington Univ, Dept Geol, Bellingham, WA 98225 USA
3.Univ Lorraine, GeoRessources Lab, CREGU, CNRS, F-54500 Vandoeuvre Les Nancy, France
推荐引用方式
GB/T 7714		 Liu, Xuan,Yang, Kuifeng,Rusk, Brian,et al. Copper Sulfide Remobilization and Mineralization during Paleoproterozoic Retrograde Metamorphism in the Tongkuangyu Copper Deposit, North China Craton[J]. MINERALS,2019,9(7):27.
APA Liu, Xuan,Yang, Kuifeng,Rusk, Brian,Qiu, Zhengjie,Hu, Fangfang,&Pironon, Jacques.(2019).Copper Sulfide Remobilization and Mineralization during Paleoproterozoic Retrograde Metamorphism in the Tongkuangyu Copper Deposit, North China Craton.MINERALS,9(7),27.
MLA Liu, Xuan,et al."Copper Sulfide Remobilization and Mineralization during Paleoproterozoic Retrograde Metamorphism in the Tongkuangyu Copper Deposit, North China Craton".MINERALS 9.7(2019):27.

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来源：地质与地球物理研究所

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