气候变化领域集成服务门户(CCPortal): Cretaceous magmatism and metallogeny in the Bangong-Nujiang metallogenic belt, central Tibet: Evidence from petrogeochemistry, zircon U-Pb ages, and Hf-O isotopic compositions

CCPortal

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, Guang-Ming; Qin, Ke-Zhang; Li, Jin-Xiang; Evans, Noreen J.; Zhao, Jun-Xing; Cao, Ming-Jian; Zhang, Xia-Nan
通讯作者	Li, GM (通讯作者)
发表日期	2017
ISSN	1342-937X
EISSN	1878-0571
起始页码	110
结束页码	127
卷号	41
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.
关键词	PORPHYRY CU-MO ORE-BEARING PORPHYRIES NORTHERN LHASA TERRANE EASTERN GANGDESE BELT MOLYBDENITE RE-OS TECTONIC EVOLUTION SOUTHERN TIBET TRACE-ELEMENT COPPER BELT AU DEPOSIT
英文关键词	Petrogenesis; Zircon U-Pb ages; Zircon Hf-O isotopes; Bangong-Nujiang metallogenic belt; Tibet
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000397873300008
来源期刊	GONDWANA RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259016
推荐引用方式 GB/T 7714	Li, Guang-Ming,Qin, Ke-Zhang,Li, Jin-Xiang,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]. 中国科学院青藏高原研究所,2017,41.
APA	Li, Guang-Ming.,Qin, Ke-Zhang.,Li, Jin-Xiang.,Evans, Noreen J..,Zhao, Jun-Xing.,...&Zhang, Xia-Nan.(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.
MLA	Li, Guang-Ming,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(2017).