Magmatic and metamorphic events recorded in granitic gneisses from the;Qimantag, East Kunlun Mountains, Northwest China.

	Magmatic and metamorphic events recorded in granitic gneisses from the;Qimantag, East Kunlun Mountains, Northwest China.
	Meng FanCong 2; Cui MeiHui ; Wu XiangKe ; Wu JiuFang ; Wang JianHua
刊名	ACTA PETROLOGICA SINICA
	2013
卷号	29 期号:6 页码:2107-2122
关键词	Granitic gneisses Neoproterozoic Middle Paleozoic Jinshuikou Group Qimantag East Kunlun
ISSN号	1000-0569
英文摘要	SHRIMP and LA-ICP-MS U-Pb analyses of zirons from granitic gneisses from Jinshuikou Group in the East Kunlun Mountains Qimantag belt indicate magmatic crystallization at 938 +/- 5Ma and 938 +/- 2Ma. Major elements, trace elements, and Sm-Nd isotopic data also indicate that all these Early-Neoproterozoic granites are characterized by the features of crust-derived and typical continent-continent syn-collisional granites. We infer that source of the granites similar to Baishahe Formation of the Proterozoic Jinshuikou Group. (Meta-) granitoids of similar ages, 1000 similar to 900Ma, occurred in further eastern segment of East Kunlun, the North Qaidam terrane and the Altyn Tagh Fault, suggesting this magmatic activity is widespread, that might be related to the assemble of different blocks, marking basement formation of Neoproterozoic craton in the Northwest China; this event might be the response of the formation of Rodinia Supercontinent. Zircon rims in one of these samples yield younger ages (416 +/- 11Ma) compatible with zircon from Silurian-Divonian granites. Ar-40/Ar-39 dating of muscovite from granitic gneisses is 406 +/- 2Ma. These ages revealed distinct metamorphic and cooling events of Early-Neoproterozoic granites during Silurian-Divonian. This tectono-thermal event is related to the closure of the Qimantag oceanic basin or marginal sea basin.
学科主题	变质岩岩石学
WOS关键词	U-PB GEOCHRONOLOGY ; NORTHEASTERN TIBETAN PLATEAU ; QAIDAM HP/UHP TERRANE ; WESTERN CHINA ; TECTONIC IMPLICATIONS ; ZIRCON GEOCHRONOLOGY ; NW CHINA ; GEOLOGICAL SIGNIFICANCE ; XITIESHAN AREA ; QILIAN BLOCK
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000322427000018
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40071]
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.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Meng FanCong,Cui MeiHui,Wu XiangKe,et al. Magmatic and metamorphic events recorded in granitic gneisses from the;Qimantag, East Kunlun Mountains, Northwest China.[J]. ACTA PETROLOGICA SINICA,2013,29(6):2107-2122.
APA	Meng FanCong,Cui MeiHui,Wu XiangKe,Wu JiuFang,&Wang JianHua.(2013).Magmatic and metamorphic events recorded in granitic gneisses from the;Qimantag, East Kunlun Mountains, Northwest China..ACTA PETROLOGICA SINICA,29(6),2107-2122.
MLA	Meng FanCong,et al."Magmatic and metamorphic events recorded in granitic gneisses from the;Qimantag, East Kunlun Mountains, Northwest China.".ACTA PETROLOGICA SINICA 29.6(2013):2107-2122.