Early stage of Early Paleozoic orogenic event in western Yunnan;Province, southeastern margin of Tibet Plateau.

	Early stage of Early Paleozoic orogenic event in western Yunnan;Province, southeastern margin of Tibet Plateau.
	Cai ZhiHui 3; Xu ZhiQin ; Duan XiangDong 1; Li HuaQi ; Cao Hui ; Huang XueMeng
刊名	ACTA PETROLOGICA SINICA
	2013
卷号	29 期号:6 页码:2123-2140
关键词	Southeastern Tibet Plateau Western Yunnan Early Paleozoic Andean-type Orogen
ISSN号	1000-0569
英文摘要	Field investigation, LA-ICP-MS zircon U-Pb dating and Hf isotope composition analysis applied in this paper show that: In mangshi area, southeastern margin of the Tibet Plateau, Ordovician conglomerate are unconformable on Cambrian and Pre-Cambrian metamorphic rocks. Zircon rim U-Pb age of the augen gneiss collected from Longjiang area is 518 similar to 502Ma, representing the protolith granite crystallization time. The spectrum of U-Pb age for inherited zircons is similar with the Lhasa terrane, implicates that Tengchong terrane and Lhasa terrane belong to a unified continent during the early stage of Early Paleozoic. The feature of negative and large range of epsilon(Hf)(t) values (-15. 7 similar to -2. 0) of zircon rims, combined with field obervition and petrographic study, shows that the protolith granite of the augen gneiss originated from old crustal injected by varing mantle components, may represent a part of a magmatic arc. Through field observations and zircon isotope analysis, we explicitly pointed to the existence of Early Palaeozoic orogenic event in southeastern margin of the Tibetan Plateau. Compared with the same period of tectonic events happened in Lhasa, Himalaya and Qiangtang terranes, we regard the Early Paleozoic orogenic belt in the southeastern Tibet Plateau is a part of the Andean-type Orogenic belt formed along the northern margin of Gondwana, provids new evidences for understanding the evolution of the Gondwana during Early Paleozoic.
学科主题	构造地质学
WOS关键词	U-PB GEOCHRONOLOGY ; HIMALAYAN METAMORPHIC CORE ; INDIA-EURASIA COLLISION ; HF ISOTOPIC COMPOSITION ; NAMCHE BARWA COMPLEX ; TECTONIC IMPLICATIONS ; CENTRAL NEPAL ; PAN-AFRICAN ; ZIRCON AGES ; NORTHWESTERN HIMALAYA
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000322427000019
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40101]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, State Key Lab Continental Tecton & Dynam, Inst Geol, Beijing 100037, Peoples R China. 2.Yunnan Bur Geol Survey, Kunming 650051, 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	Cai ZhiHui,Xu ZhiQin,Duan XiangDong,et al. Early stage of Early Paleozoic orogenic event in western Yunnan;Province, southeastern margin of Tibet Plateau.[J]. ACTA PETROLOGICA SINICA,2013,29(6):2123-2140.
APA	Cai ZhiHui,Xu ZhiQin,Duan XiangDong,Li HuaQi,Cao Hui,&Huang XueMeng.(2013).Early stage of Early Paleozoic orogenic event in western Yunnan;Province, southeastern margin of Tibet Plateau..ACTA PETROLOGICA SINICA,29(6),2123-2140.
MLA	Cai ZhiHui,et al."Early stage of Early Paleozoic orogenic event in western Yunnan;Province, southeastern margin of Tibet Plateau.".ACTA PETROLOGICA SINICA 29.6(2013):2123-2140.