Thrust-controlled, sediment-hosted, Himalayan Zn-Pb-Cu-Ag deposits in the Lanping foreland fold belt, eastern margin of Tibetan Plateau

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	Thrust-controlled, sediment-hosted, Himalayan Zn-Pb-Cu-Ag deposits in the Lanping foreland fold belt, eastern margin of Tibetan Plateau
	He, LQ (He, Longqing); Song, YC (Song, Yucai); Chen, KX (Chen, Kaixu); Hou, ZQ (Hou, Zengqian); Yu, FM (Yu, Fengming); Yang, ZS (Yang, Zhusen); Wei, JQ (Wei, Junqi); Li, Z (Li, Zheng); Liu, YC (Liu, Yingchao)
刊名	ORE GEOLOGY REVIEWS
	2009
卷号	36 期号:1-3 页码:106-132
关键词	Lanping Zn-Pb-Cu-Ag deposit Thrust system Basinal brines Himalayan
ISSN号	0169-1368
英文摘要	Cenozoic economic Zn-Pb-Cu-Ag ore deposits occur in the Lanping foreland fold belt (Lanping basin) of the Eastern Indo-Asian collision zone (EIACZ), eastern margin of the Tibetan plateau. They are sediment-hosted and controlled by two Cenozoic thrust-nappe systems developed in the western and eastern segments of the Tertiary basin, respectively, where thrusting was towards the centre of the basin in an approximately E-W direction and juxtaposes Triassic-Cretaceous over Tertiary strata. In the western system, Cu deposits occur as veins in the root zone, hosted by similar to NS-striking faults in Jurassic intense folds. Zn deposits occur in its front zone, controlled by second-order faults of major thrust faults and thrust-related strike-slip faults. In the eastern system, Zn-Pb-Cu-Ag deposits are located in the front zone, controlled by an E-clipping thrust fault and its second-order faults. The giant Jinding Zn-Pb deposit is controlled by a trap structure related to regional thrusting. Homogenization temperatures of fluid inclusions from these deposits are predominately <200 degrees C, with salinities of 1.6 to 27.7 wt.% NaCl equiv. Ore sulfides have Pb isotopes similar to the rocks in the basin and delta(34)S(CDT) values ranging from -30.4 parts per thousand to 11.2 parts per thousand. H-O isotopes of fluid inclusions are similar to those of basinal brines, and C-O isotopes of hydrothermal carbonate minerals are partly close to those of carbonates and sedimentary organisms. These data suggest that the ore-forming fluids and materials mainly derive from the fluids and various rocks of the basin, respectively. The sediment-hosted Zn-Pb-Cu-Ag deposits in the Lanping foreland fold belt share some similarities with MVT-, SST-, SSC-, and SEDEX-type deposits in that there is a lack of any igneous affinity and instead must relate to activities of basinal fluids. The deposits show, however, a set of unique features (1) they were formed in a strongly deformed foreland basin within a continent collision orogen and (2) closely related to regional thrust-nappe structure; (3) they are fault-controlled, commonly without strong selection for type of host rocks; and (4) contain a variety of metals including Zn, Pb, Cu, Ag, and minor Sr, Co, etc. It is suggested that the Zn-Pb-Cu-Ag deposits controlled by the thrust systems in the Lanping foreland belt are a new subtype within the family of sediment-hosted base metal deposits. (C) 2008 Elsevier B.V. All rights reserved.
学科主题	构造地质学
WOS关键词	SOUTH CHINA ; BASIN ; GENESIS ; YUNNAN ; LEAD ; GEOCHEMISTRY ; EVOLUTION ; MODEL ; FLOW
WOS研究方向	Geology ; Mining & Mineral Processing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000271411200007
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38815]
专题	中国地质调查局
作者单位	Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 10003, Peoples R China
推荐引用方式 GB/T 7714	He, LQ ,Song, YC ,Chen, KX ,et al. Thrust-controlled, sediment-hosted, Himalayan Zn-Pb-Cu-Ag deposits in the Lanping foreland fold belt, eastern margin of Tibetan Plateau[J]. ORE GEOLOGY REVIEWS,2009,36(1-3):106-132.
APA	He, LQ .,Song, YC .,Chen, KX .,Hou, ZQ .,Yu, FM .,...&Liu, YC .(2009).Thrust-controlled, sediment-hosted, Himalayan Zn-Pb-Cu-Ag deposits in the Lanping foreland fold belt, eastern margin of Tibetan Plateau.ORE GEOLOGY REVIEWS,36(1-3),106-132.
MLA	He, LQ ,et al."Thrust-controlled, sediment-hosted, Himalayan Zn-Pb-Cu-Ag deposits in the Lanping foreland fold belt, eastern margin of Tibetan Plateau".ORE GEOLOGY REVIEWS 36.1-3(2009):106-132.