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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
Source PublicationJOURNAL OF GEOCHEMICAL EXPLORATION
ISSN0375-6742
Volume198Pages:123-131
AbstractThe 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.
KeywordXiaotongchang Cu deposit LLHR Chalcopyrite Re-Os isotopic age Ailaoshan orogenic belt
DOI10.1016/j.gexplo.2018.11.011
Funding OrganizationNational 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 KeywordORE CONCENTRATION REGION ; ISOTOPE EVIDENCE ; YUNNAN PROVINCE ; COPPER-DEPOSIT ; FLOOD BASALTS ; PB ; SYSTEMATICS ; PYRITE ; MINERALIZATION ; CHINA
Language英语
Funding ProjectNational Natural Science Foundation of China[NSFC 41503056] ; National Natural Science Foundation of China[41603016]
Funding OrganizationNational 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 Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000456805000010
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90195
Collection矿产资源研究院重点实验室
Corresponding AuthorZhang, Lianchang
Affiliation1.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
Recommended Citation
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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