The Eastern Himalayan syntaxis: major tectonic domains, ophiolitic;melanges and geologic evolution

doi:10.1016/j.jseaes.2005.03.009

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质调查局成都地质调查中心

	The Eastern Himalayan syntaxis: major tectonic domains, ophiolitic;melanges and geologic evolution
	Geng Quanru 5; Pan Guitang ; Zheng, Lailin ; Chen, Zhiliang ; Fisher, Richard D.; Sun, Zhiming ; Ou, Chunsheng ; Dong, Han ; Wang, Xiaowei ; Li, Sheng
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2006
卷号	27 期号:3 页码:265-285
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2005.03.009
英文摘要	Geologic mapping in the eastern Himalayan syntaxis confirmed the three regional tectonic elements outlined by previous geologic workers. Our studies, however, show that the Indus-Yarlung Tsangpo suture (IYS) is a continuous melange zone that forms an inverted U in map view around the Namche Barwa antiform. The Namche Barwa and Nyainqentanglha crystalline complexes lie below and above the IYS suture, respectively, and both were parts of the northern Indian plate basement rocks with petrologically and geochronologically correlative protoliths. Both units were deformed, metamorphosed and intruded at the end of the Proterozoic. The Zhibai Formation, the lower part of the Namche Barwa Group, extends along the northwest slope of the Himalaya, and is mainly composed of highly deformed aluminous felsic gneiss containing sporadic boudins of high-pressure granulite in the Namche Barwa antiform. The upper part of the Namche Barwa Group includes a calcareous rock assemblage characteristized by marble and diopside-bearing calcsilicate rocks interlayed with felsic gneiss. Petrochemical studies show that the IYS contains lenses of oceanic crustal rocks originated from fore-arc trench, island arc, and back-arc basin environments, which implies they were derived from a SSZ-type (supra-subduction zone) ophiolite. Our field mapping identifies the Jiali-Parlung Tsangpo remnant suture (JPS) that lies north of the Namche Barwa antiform as a possible branch of the Neo-Tethyan oceanic realm. Subduction of the Mesozoic Neo-Tethyan oceanic plate resulted in both Mesozoic and Cenozoic granite intrusions in the northwest-trending Gangdise magmatic belt along the southern edge of Asia. Uplift and exhumation have been the most recent dominant tectonic processes in the late Cenozoic for the High Himalayan crystalline rocks (Namche Barwa Group) in the core of the Namche Barwa antiform. (c) 2005 Elsevier Ltd. All rights reserved.
学科主题	构造地质学
WOS关键词	HIGH-PRESSURE GRANULITES ; NAMCHE-BARWA SYNTAXIS ; PAKISTAN ; TIBET ; NAMJAGBARWA ; CONSTRAINTS ; EXHUMATION ; PETROLOGY
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000239362500001
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38128]
专题	中国地质调查局成都地质调查中心
作者单位	1.Chengdu Inst Geol & Min Resources, Chengdu 610082, Peoples R China. 2.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China. 3.Canyons Worldwide, Tucson, AZ 85754 USA. 4.Lanzhou Inst Geol Survey, Gansu 730050, Peoples R China. 5.中国地质调查局成都地质调查中心
推荐引用方式 GB/T 7714	Geng Quanru,Pan Guitang,Zheng, Lailin,et al. The Eastern Himalayan syntaxis: major tectonic domains, ophiolitic;melanges and geologic evolution[J]. JOURNAL OF ASIAN EARTH SCIENCES,2006,27(3):265-285.
APA	Geng Quanru.,Pan Guitang.,Zheng, Lailin.,Chen, Zhiliang.,Fisher, Richard D..,...&Fu, Heng.(2006).The Eastern Himalayan syntaxis: major tectonic domains, ophiolitic;melanges and geologic evolution.JOURNAL OF ASIAN EARTH SCIENCES,27(3),265-285.
MLA	Geng Quanru,et al."The Eastern Himalayan syntaxis: major tectonic domains, ophiolitic;melanges and geologic evolution".JOURNAL OF ASIAN EARTH SCIENCES 27.3(2006):265-285.