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Pyrite Rb-Sr, Sm-Nd and Fe isotopic constraints on the age and genesis of the Qingchengzi Pb-Zn deposits, northeastern China
Xu, Lei1,2; Yang, Jin-Hui1,2; Zeng, Qing-Dong1,2; Xie, Lie-Wen1; Zhu, Yu-Sheng1; Li, Rui1,2; Li, Bin3
2020-02-01
Source PublicationORE GEOLOGY REVIEWS
ISSN0169-1368
Volume117Pages:14
AbstractSr-Nd-Fe isotopes are reported for pyrites and whole rocks of ores and associated rocks for the Qingchengzi Pb-Zn deposits in the northeasern China, to investigate the age, sources and processes of the Pb-Zn mineralization. Rb-Sr leaching isotopic dating of pyrites that crystallized coeval with galena and sphalerite from five subsamples of ores yields isochron ages of 143 +/- 12 Ma to 159 +/- 12 Ma with a weighted mean age of 151.8 +/- 5.2 Ma. This age can be interpreted to be the timing of Pb-Zn mineralization, coeval with the emplacement of Late Jurassic granites in the region. The pyrites have negative epsilon(Nd) (152 Ma) values of -17.6 to -22.0, among the Neoarchean TTG rocks, Paleoproterozoic meta-sedimetary rocks (i.e., wall rocks) and granites, and Mesozoic mafic dykes and granites. However, the initial Sr-87/Sr-86 ratio of 0.7188 +/- 0.0004 is similar to those of Late Jurassic granites and Paleoproterozoic rocks (0.7082-0.7183), distinct from those of mafic dykes (0.7069-0.7110), indicating the ore-forming materials (i.e., Pb and Zn) were mainly derived from wall rocks and Late Jurassic granites. Combined with the previously-published H-O isotopes, the new age and Sr-Nd isotopic data indicate that the mineralizaing fluids were mainly derived from dehydration of granitic magmas, interacted with meteoric water that extracted Pb and Zn from the wall rocks. The delta Fe-56 values of pyrites in the Pb-Zn ores and Paleoproterozoic meta-sedimentary rocks range from +0.23 parts per thousand to +1.09 parts per thousand and 0.494 parts per thousand to +0.17 parts per thousand, respectively, distinct from those of Paleoproterozoic basement rocks and Mesozoic rocks (-0.03 parts per thousand to +0.28 parts per thousand). Combined with Nd isotopes, the large range of delta Fe-56 values for pyrites would be the result of rapid precipitation of pyrites in the wall rocks and contemperal deposition of pyrites in the residual fluids during interaction between wall rocks and ore-forming fluids. Collectively, our new Sr-Nd-Fe isotopes of pyrites not only constrain the age and sources of Pb and Zn mineralization, but also reveal the detailed mineralization processes, providing a new method to constrain the genesis of hydrothermal Pb-Zn deposits.
KeywordPyrite Rb-Sr geochronology Pb-Zn mineralization Ore-forming fluids Pyrite Sr-Nd-Fe isotopes
DOI10.1016/j.oregeorev.2020.103324
Funding OrganizationMinistry of Science and Technology of People's Republic of China ; Ministry of Science and Technology of People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of People's Republic of China ; Ministry of Science and Technology of People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of People's Republic of China ; Ministry of Science and Technology of People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of People's Republic of China ; Ministry of Science and Technology of People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordLIAO-JI BELT ; BAIYUN GOLD DEPOSIT ; NORTH CHINA ; EASTERN BLOCK ; TECTONIC EVOLUTION ; CONTINENTAL-CRUST ; SILVER DEPOSIT ; JILIN PROVINCE ; ORE-DEPOSIT ; ICP-MS
Language英语
Funding ProjectMinistry of Science and Technology of People's Republic of China[2016YFC0600109] ; National Natural Science Foundation of China[41688103]
Funding OrganizationMinistry of Science and Technology of People's Republic of China ; Ministry of Science and Technology of People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of People's Republic of China ; Ministry of Science and Technology of People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of People's Republic of China ; Ministry of Science and Technology of People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of People's Republic of China ; Ministry of Science and Technology of People's Republic of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaGeology ; Mineralogy ; Mining & Mineral Processing
WOS SubjectGeology ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000515206900024
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95600
Collection岩石圈演化国家重点实验室
Corresponding AuthorYang, Jin-Hui
Affiliation1.Chinese Acad Sci, Innovat Acad Earth Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Liaoning Dandong Qingchengzi Min Co Ltd, Dandong 118107, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Xu, Lei,Yang, Jin-Hui,Zeng, Qing-Dong,et al. Pyrite Rb-Sr, Sm-Nd and Fe isotopic constraints on the age and genesis of the Qingchengzi Pb-Zn deposits, northeastern China[J]. ORE GEOLOGY REVIEWS,2020,117:14.
APA Xu, Lei.,Yang, Jin-Hui.,Zeng, Qing-Dong.,Xie, Lie-Wen.,Zhu, Yu-Sheng.,...&Li, Bin.(2020).Pyrite Rb-Sr, Sm-Nd and Fe isotopic constraints on the age and genesis of the Qingchengzi Pb-Zn deposits, northeastern China.ORE GEOLOGY REVIEWS,117,14.
MLA Xu, Lei,et al."Pyrite Rb-Sr, Sm-Nd and Fe isotopic constraints on the age and genesis of the Qingchengzi Pb-Zn deposits, northeastern China".ORE GEOLOGY REVIEWS 117(2020):14.
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