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Cretaceous magmatism and metallogeny in the Bangong-Nujiang metallogenic belt, central Tibet: Evidence from petrogeochemistry, zircon U-Pb ages, and Hf-O isotopic compositions
Li, GM (Li, Guang-Ming)1,2; Qin, KZ (Qin, Ke-Zhang)1,2; Li, JX (Li, Jin-Xiang)2,3; Evans, NJ (Evans, Noreen J.)4; Zhao, JX (Zhao, Jun-Xing)1; Cao, MJ (Cao, Ming-Jian)1; Zhang, XN (Zhang, Xia-Nan)1,5; Li, GM
Source PublicationGONDWANA RESEARCH
2017
Volume41Issue:0Pages:110-127
DOI10.1016/j.gr.2015.09.006
AbstractPorphyry Cu-Au and porphyry-skarn Cu +/- Au +/- Mo deposits are widely distributed in the Bangong-Nujiang metallogenic belt, central Tibet. Zircon U-Pb dating has revealed that Cretaceous ore-bearing intrusions related to Cu +/- Au +/- Mo mineralization formed in two periods (118-115 Ma and 90-88 Ma). These primarily high-K calc-alkaline series intrusions show light rare earth element enrichment (La-N/Yb-N = 6.06-20.2) and negative to no Eu anomaly (Eu*/Eu = 0.39-1.02). On primitive mantle-normalized diagrams, all the intrusions show strong enrichments in large ion lithophile elements (e.g., Cs, Rb, and K), depletions in Nb, Ta, and Ti, and negative Ba anomalies characteristic of arc magma. These intrusions show a wide range of zircon epsilon(Hf)(t) values from-6.3 to + 10.9 and delta O-18 values from5.82 to 10.82 parts per thousand, suggesting variable contributions frommantle and crustal sources. Considering the similar to 100 Ma Lhasa-Qiangtang collision, the 118-115 Ma magmas and related deposits were likely formed by melting of subduction metasomatized mantle wedge in a continental arc setting during northward subduction of the Bangong-Nujiang ocean, and then further evolved in the upper crust as a result of MASH processes. The younger 90-88 Ma ore-bearing magmas were potentially derived from melting of previously metasomatized lithospheric mantle during slab tear and break-off after the Lhasa-Qiangtang collision. (C) 2015 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
Subject Area地质学
WOS IDWOS:000397873300008
Language英语
Indexed BySCI
KeywordPORPHYRY CU-MO ORE-BEARING PORPHYRIES NORTHERN LHASA TERRANE EASTERN GANGDESE BELT MOLYBDENITE RE-OS SOUTHERN TIBET TECTONIC EVOLUTION NORTHWESTERN TIBET TRACE-ELEMENT COPPER BELT
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary ; Geology
Cooperation Status国际
Citation statistics
Cited Times:36[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8385
Collection图书馆
Corresponding AuthorLi, GM
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China.
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China.
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100085, Peoples R China.
4.Curtin Univ, Appl Geol, TIGeR, John de Laeter Ctr Isotope Res, Perth, WA 6945, Australia.
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
Recommended Citation
GB/T 7714
Li, GM ,Qin, KZ ,Li, JX ,et al. Cretaceous magmatism and metallogeny in the Bangong-Nujiang metallogenic belt, central Tibet: Evidence from petrogeochemistry, zircon U-Pb ages, and Hf-O isotopic compositions[J]. GONDWANA RESEARCH,2017,41(0):110-127.
APA Li, GM .,Qin, KZ .,Li, JX .,Evans, NJ .,Zhao, JX .,...&Li, GM.(2017).Cretaceous magmatism and metallogeny in the Bangong-Nujiang metallogenic belt, central Tibet: Evidence from petrogeochemistry, zircon U-Pb ages, and Hf-O isotopic compositions.GONDWANA RESEARCH,41(0),110-127.
MLA Li, GM ,et al."Cretaceous magmatism and metallogeny in the Bangong-Nujiang metallogenic belt, central Tibet: Evidence from petrogeochemistry, zircon U-Pb ages, and Hf-O isotopic compositions".GONDWANA RESEARCH 41.0(2017):110-127.
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