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The Rb-Sr isotopic dating of sulfides and geological significance of the Lushi polymetallic ore-concentrated area in southern margin of the North China Craton
Zhang ZheMing1,2,3; Zeng QingDong1,2,3; Gao Shuai1,2,3; Chu ShaoXiong1,2; Li DeTing1,2; Cheng ZhanDong4; Ma LiuSuo4; Guo YunPeng1,2
2019
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume35Issue:7Pages:2013-2025
AbstractThere are a lot of Au, Mo and Pb-Zn polymetallic ore deposits developed in Qinling metallogenic belt, southern margin of the North China Craton. The Lushi polymetallic ore-concentrated area is located in eastern part of this belt, which including Yechangping Mo-W deposit, Babaoshan Fe-Cu deposit, Loufang Ag-Cu deposit, Liuguan Pb-Zn deposit, and so on. Loufang Ag-Cu deposit is a hydrothermal lode polymetallic deposit, it occurs within the amphibole plagiogneiss of Taihua Group, and the ore bodies in this deposit are controlled by the structural alteration fracture zones. Two stages of mineralization are identified in Loufang deposit: quartz-pyrite-chalcopyrite and quartz-pyrite-galena-sphalerite-calcite assemblages. The former is the Cu mineralization stage, while the latter is the Pb-Zn mineralization. Liuguan Pb-Zn deposit is a skarn deposit, whose orebodies occur within the skarn belt between dolomite of the Guandaokou Group and granite porphyry or cryptoexplosive breccia. Two stages of mineralization are identified in Liuguan deposit: diopside-tremolite-actinolite-garnet-magnetite and galena-sphalerite-pyrite-epidote-serpentine-quartz-calcite. The former is the magnetite mineralization stage, and the latter is the Pb-Zn mineralization stage. The results of chalcopyrite isochron dating indicate that the Rb-Sr isochron age of the Loufang Ag-Cu deposit is 127.8 +/- 3.1Ma (2 sigma, MSWD = 1.1), and the initial Rb-87/Sr-86 of which is 0.710998 +/- 0.000068; The Rb-Sr isochron age of pyrite in Liuguan Pb-Zn deposit is 124.8 +/- 1.6Ma (2 sigma, MSWD = 1.4), and the initial Rb-87/Sr-86 of which is 0.711074 +/- 0.000064. The age data indicate that the hydrothermal polymetallic deposits in Lushi polymetallic ore-concentrated area were formed in Early Cretaceous, which is associated with Early Cretaceous intrusive magmatism. Combining with regional geological data, it can be concluded that the polymetallic deposits in this area were formed in a tectonic setting related to craton destruction happened in Early Cretaceous.
KeywordLoufang Ag-Cu deposit Liuguan Pb-Zn deposit Rb-Sr dating Pyrite Chalcopyrite Lushi ore-concentrated area
DOI10.18654/1000-0569/2019.07.05
WOS KeywordZIRCON U-PB ; PORPHYRY MO DEPOSIT ; QINLING OROGEN ; GOLD DEPOSIT ; MOLYBDENUM DEPOSITS ; TECTONIC EVOLUTION ; AGE ; GEOCHEMISTRY ; PETROGENESIS ; GENESIS
Language英语
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000491151100005
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/93906
Collection矿产资源研究院重点实验室
Corresponding AuthorZeng QingDong
Affiliation1.Chinese Acad Sci, Key Lab Mineral Resources, Inst Geol & Geophys, 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.Lushi Country Bur Land & Resource, Lushi 472200, Peoples R China
First Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang ZheMing,Zeng QingDong,Gao Shuai,et al. The Rb-Sr isotopic dating of sulfides and geological significance of the Lushi polymetallic ore-concentrated area in southern margin of the North China Craton[J]. ACTA PETROLOGICA SINICA,2019,35(7):2013-2025.
APA Zhang ZheMing.,Zeng QingDong.,Gao Shuai.,Chu ShaoXiong.,Li DeTing.,...&Guo YunPeng.(2019).The Rb-Sr isotopic dating of sulfides and geological significance of the Lushi polymetallic ore-concentrated area in southern margin of the North China Craton.ACTA PETROLOGICA SINICA,35(7),2013-2025.
MLA Zhang ZheMing,et al."The Rb-Sr isotopic dating of sulfides and geological significance of the Lushi polymetallic ore-concentrated area in southern margin of the North China Craton".ACTA PETROLOGICA SINICA 35.7(2019):2013-2025.
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