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LLHR-type chalcopyrite Re-Os geochronology and geochemistry of the Xiaotongchang Cu deposit in south Ailaoshan and its geological significances
Li, Wenjun1,2,3; Gao, Bingyu1,2,3; Zhang, Lianchang1,2,3; Jin, Xindi1,2; Sakyi, Patrick Asamoah4
2019-03-01
发表期刊JOURNAL OF GEOCHEMICAL EXPLORATION
ISSN0375-6742
卷号198页码:123-131
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.
关键词Xiaotongchang Cu deposit LLHR Chalcopyrite Re-Os isotopic age Ailaoshan orogenic belt
DOI10.1016/j.gexplo.2018.11.011
资助者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
关键词[WOS]ORE CONCENTRATION REGION ; ISOTOPE EVIDENCE ; YUNNAN PROVINCE ; COPPER-DEPOSIT ; FLOOD BASALTS ; PB ; SYSTEMATICS ; PYRITE ; MINERALIZATION ; CHINA
语种英语
资助项目National Natural Science Foundation of China[NSFC 41503056] ; National Natural Science Foundation of China[41603016]
资助者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
WOS研究方向Geochemistry & Geophysics
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000456805000010
出版者ELSEVIER SCIENCE BV
引用统计
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/90195
专题矿产资源研究院重点实验室
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
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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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