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Genesis of the Yaguila Pb-Zn-Ag-Mo skarn deposit in Tibet: Insights from geochronology, geochemistry, and fluid inclusions
Xu, Jing1,2; Zheng, Youye3,4,5,6; Sun, Xiang5,6; Li, Xiaofeng1,2,7; Mao, Guangzhou8
2019-04-01
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
Volume172Pages:83-100
AbstractThe Yaguila skarn deposit with reserves of 52 Mt at 4% Pb, 2% Zn, and 64.3 g/t Ag is located in the eastern segment of the central Lhasa subterrane, Tibet. The stratabound skarn Pb-Zn-Ag orebodies are hosted in the Upper Carboniferous-Lower Permian Laigu Formation, which consists of meta-quartz sandstone, slate, and marble. Molybdenum occurs as quartz-molybdenite +/- pyrite veinlets, veins, and partial disseminations in the Paleocene quartz porphyry, slate, and garnet skarn. Zircon U-Pb dating suggests that three major magmatic events occurred in the Yaguila area, producing Cretaceous rhyolitic rock (ca. 128 Ma), Paleocene quartz porphyry (65.6 +/- 1.2 Ma), and Miocene granite porphyry (17.8 +/- 0.4 Ma). Combined with the published data, the quartz porphyry has variable epsilon(Hf)(t) values of -13.9 to +12.1, (Sr-87/Sr-86)(i) values of 0.71718-0.72805, and epsilon(Nd)(t) values of -5.2 to -13.5, whereas the granite porphyry displays relatively restricted epsilon(Hf)(t) values of +2.3 to + 6.5, (Sr-87/Sr-86)(i) values of 0.70798-0.71678, and epsilon(Nd)(t) values of -2.8 to -5.5. Geochemical and isotopic (Sr-Nd-Pb-Hf) signatures indicate that the Cretaceous rhyolitic magma was derived from the melting of continental lower crust of the ancient Lhasa subterrane with a strong fractional crystallization. The emplacement of the Paleocene quartz porphyry probably resulted from the magma mixing process between the dominant Lhasa middle-upper crust-derived magma and varying contributions of mantle-derived materials during the collision and Neo-Tethyan subduction slab rollback. The Miocene granite porphyry was likely formed by the melting of thickened Lhasa lower crust, which was triggered by upwelling of hot asthenosphere. Our molybdenite Re-Os data from garnet skarn, together with published data from quartz porphyry and slate, display an excellent isochron age of 64.3 +/- 1.6 Ma. Fluid inclusion data from this study reveal that the ore-forming fluids associated with diverse types of molybdenum mineralization were a common magmatic-hydrothermal fluid with moderate to high temperatures (290-400 degrees C) and moderate salinities (9-22 wt% NaCl equiv.). Our study suggests that the Yaguila Pb-Zn-Ag and Mo mineralization occurred under the same ore system associated with the Paleocene quartz porphyry.
KeywordGeochronology Geochemistry Sr-Nd-Pb-Hf isotopes Yaguila Pb-Zn-Ag-Mo skarn Central Lhasa subterrane Tibet
DOI10.1016/j.jseaes.2018.08.007
Funding OrganizationCommonwealth Project from the Ministry of Land and Resources ; Commonwealth Project from the Ministry of Land and Resources ; Changjiang Scholars and Innovative Research Team in University ; Changjiang Scholars and Innovative Research Team in University ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Commonwealth Project from the Ministry of Land and Resources ; Commonwealth Project from the Ministry of Land and Resources ; Changjiang Scholars and Innovative Research Team in University ; Changjiang Scholars and Innovative Research Team in University ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Commonwealth Project from the Ministry of Land and Resources ; Commonwealth Project from the Ministry of Land and Resources ; Changjiang Scholars and Innovative Research Team in University ; Changjiang Scholars and Innovative Research Team in University ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Commonwealth Project from the Ministry of Land and Resources ; Commonwealth Project from the Ministry of Land and Resources ; Changjiang Scholars and Innovative Research Team in University ; Changjiang Scholars and Innovative Research Team in University ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
WOS KeywordCONTINENTAL COLLISION ZONES ; CENTRAL LHASA TERRANE ; RE-OS GEOCHRONOLOGY ; U-PB ; SOUTHERN TIBET ; LU-HF ; ISOTOPIC CONSTRAINTS ; BRITISH-COLUMBIA ; VOLCANIC-ROCKS ; GANGDESE BELT
Language英语
Funding ProjectCommonwealth Project from the Ministry of Land and Resources[201511015] ; Changjiang Scholars and Innovative Research Team in University[IRT14R54] ; China Postdoctoral Science Foundation
Funding OrganizationCommonwealth Project from the Ministry of Land and Resources ; Commonwealth Project from the Ministry of Land and Resources ; Changjiang Scholars and Innovative Research Team in University ; Changjiang Scholars and Innovative Research Team in University ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Commonwealth Project from the Ministry of Land and Resources ; Commonwealth Project from the Ministry of Land and Resources ; Changjiang Scholars and Innovative Research Team in University ; Changjiang Scholars and Innovative Research Team in University ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Commonwealth Project from the Ministry of Land and Resources ; Commonwealth Project from the Ministry of Land and Resources ; Changjiang Scholars and Innovative Research Team in University ; Changjiang Scholars and Innovative Research Team in University ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Commonwealth Project from the Ministry of Land and Resources ; Commonwealth Project from the Ministry of Land and Resources ; Changjiang Scholars and Innovative Research Team in University ; Changjiang Scholars and Innovative Research Team in University ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000459837500006
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90902
Collection矿产资源研究院重点实验室
Corresponding AuthorZheng, Youye
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.China Univ Geosci, Fac Earth Resources, Wuhan 430074, Hubei, Peoples R China
4.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Hubei, Peoples R China
5.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China
6.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
7.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
8.Shandong Univ Sci & Technol, Coll Geol Sci & Engn, Qingdao 266510, Peoples R China
Recommended Citation
GB/T 7714
Xu, Jing,Zheng, Youye,Sun, Xiang,et al. Genesis of the Yaguila Pb-Zn-Ag-Mo skarn deposit in Tibet: Insights from geochronology, geochemistry, and fluid inclusions[J]. JOURNAL OF ASIAN EARTH SCIENCES,2019,172:83-100.
APA Xu, Jing,Zheng, Youye,Sun, Xiang,Li, Xiaofeng,&Mao, Guangzhou.(2019).Genesis of the Yaguila Pb-Zn-Ag-Mo skarn deposit in Tibet: Insights from geochronology, geochemistry, and fluid inclusions.JOURNAL OF ASIAN EARTH SCIENCES,172,83-100.
MLA Xu, Jing,et al."Genesis of the Yaguila Pb-Zn-Ag-Mo skarn deposit in Tibet: Insights from geochronology, geochemistry, and fluid inclusions".JOURNAL OF ASIAN EARTH SCIENCES 172(2019):83-100.
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