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LLHR-type chalcopyrite Re-Os geochronology and geochemistry of the Xiaotongchang Cu deposit in south Ailaoshan and its geological significances

文献类型：期刊论文

作者Li, Wenjun1,2,3; Gao, Bingyu1,2,3; Zhang, Lianchang1,2,3; Jin, Xindi1,2; Sakyi, Patrick Asamoah4
刊名JOURNAL OF GEOCHEMICAL EXPLORATION
出版日期2019-03-01
卷号198页码:123-131
ISSN号0375-6742
关键词Xiaotongchang Cu deposit LLHR Chalcopyrite Re-Os isotopic age Ailaoshan orogenic belt
DOI10.1016/j.gexplo.2018.11.011
英文摘要The Xiaotongchang Cu deposit is located in the south Ailaoshan and at the contact between Yunnan province of China and Vietnam. Four Cu ore bodies are distributed parallel to each other in an interlayer fracture zone in the Permian Emeishan basalt. The major ore mineral in the deposit is chalcopyrite, and the main gangue minerals are quartz and calcite. New Re-Os data for chalcopyrite from the Xiaotongchang Cu deposit show tens of ppb Re abundances (1-86 ppb) and contain essentially no common Os. All the samples have extremely high Re-187/Os-188 (up to 2.3 x 10(4)), and the dominance of radiogenic Os and high Re-187/Os-188 are diagnostic features of "LLHR" (low-level, highly radiogenic) sulfides. The Re-Os isochrone age for the No. 1 and No. 3 Cu bodies show that the phase of Cu mineralization predominantly occurred in the Middle Triassic, with an age of 230.6 +/- 1.1 Ma. Thus, the mineralization occurred much later than the periods of major eruption of the Emeishan large igneous provinces, indicating a closer relationship with the late collisional processes in the Ailaoshan orogenic belt. Combined with REEs patterns and consistently positive delta S-34 values (7.4-9.2 parts per thousand), it can be concluded that the oreforming materials of the Cu deposit are derived from a mixture of mantle and crust components.
WOS关键词ORE CONCENTRATION REGION ; ISOTOPE EVIDENCE ; YUNNAN PROVINCE ; COPPER-DEPOSIT ; FLOOD BASALTS ; PB ; SYSTEMATICS ; PYRITE ; MINERALIZATION ; CHINA
资助项目National Natural Science Foundation of China[NSFC 41503056] ; National Natural Science Foundation of China[41603016]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000456805000010
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 Natural Science Foundation of China ; 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 Natural Science Foundation of China ; 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 Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/90195]  
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, Inst Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ Ghana, Dept Earth Sci, POB LG 58, Legon, Ghana
推荐引用方式
GB/T 7714		 Li, Wenjun,Gao, Bingyu,Zhang, Lianchang,et al. LLHR-type chalcopyrite Re-Os geochronology and geochemistry of the Xiaotongchang Cu deposit in south Ailaoshan and its geological significances[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2019,198:123-131.
APA Li, Wenjun,Gao, Bingyu,Zhang, Lianchang,Jin, Xindi,&Sakyi, Patrick Asamoah.(2019).LLHR-type chalcopyrite Re-Os geochronology and geochemistry of the Xiaotongchang Cu deposit in south Ailaoshan and its geological significances.JOURNAL OF GEOCHEMICAL EXPLORATION,198,123-131.
MLA Li, Wenjun,et al."LLHR-type chalcopyrite Re-Os geochronology and geochemistry of the Xiaotongchang Cu deposit in south Ailaoshan and its geological significances".JOURNAL OF GEOCHEMICAL EXPLORATION 198(2019):123-131.

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来源：地质与地球物理研究所

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