Genesis of adakitic porphyry and tectonic controls on the Gangdese;Miocene porphyry copper belt in the Tibetan orogen | |
Hou, ZQ4; Gao, YF; Meng, XL; Qu, XM; Huang, M | |
刊名 | ACTA PETROLOGICA SINICA
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2004 | |
卷号 | 20期号:2;SI SI页码:239-248 |
关键词 | Tibet collisional orogen adakitic rock porphyry copper deposit tectonic control |
ISSN号 | 1000-0569 |
英文摘要 | Most porphyry Cu deposits, a main source of base metals, occur in continent and island-arcs. Cu-bearing felsic magmas were widely regarded to be derived from the basaltic paternal magma that was formed by melting of the mantle wedge, metasomatized by hydrous fluid released from the subducted oceanic slab and then evolved by crystal fractionation with or without assimilation. However, the data we present here indicate that a Miocene porphyry Cu belt with large mineral potential occurs in the Tibetan collisional orogen, and Cu-bearing porphyries show the geochemical characteristics of adakites, which were mainly derived directly from the thickened mafic lower-crust or the subducted New-Tethyan oceanic slab. The porphyry Cu systems developed during post-collisional extension after rapid uplift of the Tibetan plateau before 13 similar to 18 Ma ago. Like arc-transverse faults in arc settings, SN-trending normal faulting systems across the Tibetan orogen resulted in rapid rising and localization of adakitic porphyry magmas and sufficiently separating of large-volume Cu-bearing fluids from the magmatie-hydrothermal systems. |
学科主题 | 火成岩岩石学 |
WOS关键词 | EAST-WEST EXTENSION ; THERMAL EVOLUTION ; SOUTHERN TIBET ; VOLCANIC-ROCKS ; SUBDUCTED LITHOSPHERE ; CONTINENTAL-CRUST ; GEOLOGIC EVOLUTION ; NW ; HIMALAYA ; ARC MAGMAS ; SLAB |
WOS研究方向 | Geology |
语种 | 中文 |
出版者 | SCIENCE CHINA PRESS |
WOS记录号 | WOS:000221036700006 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.197/handle/2HKVOGP0/37687] ![]() |
专题 | 中国地质科学院 |
作者单位 | 1.Chinese Acad Geol Sci, Inst Mineral Resource, Beijing 100037, Peoples R China. 2.Shijiazhuang Coll Econ, Shijiazhuang 050031, Peoples R China. 3.Xizang Bur Geol & Mineral Resources, Tibet 851400, Peoples R China. 4.中国地质科学院矿产资源研究所 |
推荐引用方式 GB/T 7714 | Hou, ZQ,Gao, YF,Meng, XL,et al. Genesis of adakitic porphyry and tectonic controls on the Gangdese;Miocene porphyry copper belt in the Tibetan orogen[J]. ACTA PETROLOGICA SINICA,2004,20(2;SI SI):239-248. |
APA | Hou, ZQ,Gao, YF,Meng, XL,Qu, XM,&Huang, M.(2004).Genesis of adakitic porphyry and tectonic controls on the Gangdese;Miocene porphyry copper belt in the Tibetan orogen.ACTA PETROLOGICA SINICA,20(2;SI SI),239-248. |
MLA | Hou, ZQ,et al."Genesis of adakitic porphyry and tectonic controls on the Gangdese;Miocene porphyry copper belt in the Tibetan orogen".ACTA PETROLOGICA SINICA 20.2;SI SI(2004):239-248. |
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