Labradonian and Greenvillian orogenic events in the Namche Barwa Massif of the Himalayan orogenic belt

	Labradonian and Greenvillian orogenic events in the Namche Barwa Massif of the Himalayan orogenic belt
	Wang YuHua 1; Zeng LingSen ; Gao Lie ; Zhang Lifei 1; Hou Kejun 2
刊名	ACTA PETROLOGICA SINICA
	2014
卷号	30 期号:8 页码:2241-2252
关键词	Namche Barwa Labradirian orogeny Grenvillian orogeny Geochronology Supercontinent Cycle
ISSN号	1000-0569
英文摘要	The Namche Barwa Massif, core of the eastern syntaxis of the Himalayan orogenic belt, is notably characterized by intensive and epsisodic Cenozoic deformation, metamorphism, and magmatism which strongly overprint earlier tectonic history in the Indian crystalline basement. To recover the early tectonic events still preserved in the high-grade metamorphic rocks in the Namche Barwa Massif, we have conducted petrological and geochronological investigations on granitic gneiss and migmatite. Bulk-rock element analyses show that the protolith of the granitic gneiss is high-K metaluminous granite with chemical characterization of granitic rocks formed in magmatic arc environment. Zircon grains from the granitic gneiss display textures consistent with that they were crystallied from granitic melt and yield a U-Pb age of 487. 9 +/- 1. 6Ma. In contrast, zircon grains from the host migmatite are characterized by corerim texture which yields U-Pb ages of 1559 +/- 13Ma and 1154 +/- 12Ma, respectively. Pre-collisional tectonic events experienced by the Namche Barwa Massif are similar to those in the Shillong Plateau as well as the Eastern Ghats belts in Indian continent. All of them have undergone Labradirian orogeny, Grenvillian orogeny, and pan-African orogeny, which further implies that the Namche Barwa syntaxis might be northern extension of the Shillong Plateau and Eastern Ghats belts. These three tectonic complexes might constitute an eastern orogenic belt of Indian continent (Eastern Indian Orogenic Belt) that experienced tectonic processes associated with the assembling and breakup of Columbia, Rodinia, and Gonwana supercontinent.
学科主题	构造地质学
WOS关键词	EASTERN GHATS BELT ; HIGH-PRESSURE GRANULITES ; BENEATH SOUTHERN TIBET ; MALASHAN GNEISS DOME ; TECTONIC EVOLUTION ; U-PB ; CRUSTAL ANATEXIS ; MESOPROTEROZOIC SUPERCONTINENT ; GRENVILLE PROVINCE ; PAN-AFRICAN
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000340023300009
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40533]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geol, State Key Lab Continental Tecton & Dynam, Beijing 100037, Peoples R China 2.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 3.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Wang YuHua,Zeng LingSen,Gao Lie,et al. Labradonian and Greenvillian orogenic events in the Namche Barwa Massif of the Himalayan orogenic belt[J]. ACTA PETROLOGICA SINICA,2014,30(8):2241-2252.
APA	Wang YuHua,Zeng LingSen,Gao Lie,Zhang Lifei,&Hou Kejun.(2014).Labradonian and Greenvillian orogenic events in the Namche Barwa Massif of the Himalayan orogenic belt.ACTA PETROLOGICA SINICA,30(8),2241-2252.
MLA	Wang YuHua,et al."Labradonian and Greenvillian orogenic events in the Namche Barwa Massif of the Himalayan orogenic belt".ACTA PETROLOGICA SINICA 30.8(2014):2241-2252.