Genesis of adakitic porphyry and tectonic controls on the Gangdese;Miocene porphyry copper belt in the Tibetan orogen

	Genesis of adakitic porphyry and tectonic controls on the Gangdese;Miocene porphyry copper belt in the Tibetan orogen
	Hou, ZQ 4; Gao, YF ; Meng, XL ; Qu, XM ; Huang, M
刊名	ACTA PETROLOGICA SINICA
	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.