Pan-African and Early Paleozoic orogenic events in the Himalaya terrane:;Inference from SHRIMP U-Pb zircon ages.

	Pan-African and Early Paleozoic orogenic events in the Himalaya terrane:;Inference from SHRIMP U-Pb zircon ages.
	Xu, ZQ 3; Yang, JS ; Liang, FH ; Qi, XX ; Liu, FL ; Zeng, LS ; Liu, DY ; Wu, CL ; Shi, RD ; Chen, SY
刊名	ACTA PETROLOGICA SINICA
	2005
卷号	21 期号:1 页码:1-12
关键词	Himalaya Pan-African and Early Paleozoic orogenic events SHRIMP dating
ISSN号	1000-0569
英文摘要	The Himalayan terrane is an accretional terrane formed during the collision between the India Plate and the Eurasian Plate since 55 +/- 10 Ma. SHRIMP U-Pb dating has been performed on zircons from the amphibolite facies aluminum-rich metasediments and granitic gneisses from the Greater Himalaya and the Tethyan-Himalayan units of the Himalayan terrane. The dating results indicate an widespread 529 similar to 457Ma deformation and metamorphism event, and greater than 835 Ma metamorphic basement formation age, except for the latest tectonic event at 12 similar to 20 Ma. Field observations on the Himalayan slice which has been exhumed since 20 Ma have documented earlier than Cenozoic tectonic events represented by the early intense folding, oblique southward thrusting and concurrent amphibolite facies metamorphism and the Ordovician basal conglomerate. Recent studies also yielded a number of Pan-African and Early Paleozoic ages for the metasedimentary and metamorphic basement rocks by Ion Probe U-Pb zircon dating. These lines of evidence together with our new dating results lead us to propose that the Early middle Proterozoic metamorphic basement of the India block once located in the southern hemisphere has undergone the Pan-African - Early Paleozoic orogenic events. The geochronological data suggest that: (1) the Proto-Himalaya formed as a result of the Pan-African and the Early Paleozoic orogenic events; (2) reactivation of the Early-middle Proterozoic metamorphic basement of the India block has played a key role in the formation of the Proto-Himalayan Mountains; (3) the building of the present-day Himalaya Mountains may have been initiated as early as the Pan-African and the Early Paleozoic.
学科主题	构造地质学
WOS关键词	SOUTHERN TIBET ; CENTRAL NEPAL ; TECTONICS ; COLLISION ; RODINIA ; BELT ; ASIA ; EXHUMATION ; EVOLUTION ; LAURENTIA
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000227476000001
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38036]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Med Sci, Inst Geol, Key Lab Continental Dynam, Beijing 100037, Peoples R China. 2.Chinese Acad Geol Sci, Beijing SHRIMP Ctr, Beijing 100037, Peoples R China. 3.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Xu, ZQ,Yang, JS,Liang, FH,et al. Pan-African and Early Paleozoic orogenic events in the Himalaya terrane:;Inference from SHRIMP U-Pb zircon ages.[J]. ACTA PETROLOGICA SINICA,2005,21(1):1-12.
APA	Xu, ZQ.,Yang, JS.,Liang, FH.,Qi, XX.,Liu, FL.,...&Chen, SY.(2005).Pan-African and Early Paleozoic orogenic events in the Himalaya terrane:;Inference from SHRIMP U-Pb zircon ages..ACTA PETROLOGICA SINICA,21(1),1-12.
MLA	Xu, ZQ,et al."Pan-African and Early Paleozoic orogenic events in the Himalaya terrane:;Inference from SHRIMP U-Pb zircon ages.".ACTA PETROLOGICA SINICA 21.1(2005):1-12.