Cretaceous magmatism and metallogeny in the Bangong-Nujiang metallogenic belt, central Tibet: Evidence from petrogeochemistry, zircon U-Pb ages, and Hf-O isotopic compositions

doi:10.1016/j.gr.2015.09.006

	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
刊名	GONDWANA RESEARCH
	2017
卷号	41 期号:0 页码:110-127
关键词	PORPHYRY CU-MO ORE-BEARING PORPHYRIES NORTHERN LHASA TERRANE EASTERN GANGDESE BELT MOLYBDENITE RE-OS SOUTHERN TIBET TECTONIC EVOLUTION NORTHWESTERN TIBET TRACE-ELEMENT COPPER BELT
DOI	10.1016/j.gr.2015.09.006
文献子类	Article
英文摘要	Porphyry 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.
学科主题	地质学
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000397873300008
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/8385]
专题	青藏高原研究所_图书馆
通讯作者	Li, GM
作者单位	1.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.
推荐引用方式 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.