Zircon SHRIMP U-Pb dating, Lu-Hf isotopic characteristics and petrogenesis of the Palaeozoic granites in Mangya area, southern Altun, NW China

	Zircon SHRIMP U-Pb dating, Lu-Hf isotopic characteristics and petrogenesis of the Palaeozoic granites in Mangya area, southern Altun, NW China
	Wu CaiLai 4; Gao YuanHong ; Lei Min ; Qin HaiPeng ; Liu ChunHua ; Li MingZe ; Frost, B. Ronald ; Wooden, Joseph L.
刊名	ACTA PETROLOGICA SINICA
	2014
卷号	30 期号:8 页码:2297-2323
关键词	Zircon U-Pb dating Zircon Lu-Hf isotope Granitic magmatism sequences Petrogenesis Southern Altun
ISSN号	1000-0569
英文摘要	The zircon SHRIMP U-Pb dating results of the Palaeozoic granites in the Mangya area, southern Altun show that the granite from Aketishan has an age of 264 +/- 1Ma, the granites from Chaishuigou have ages of 404 +/- 5Ma and 406 +/- 4Ma, containing diabase with an age of 454 +/- 4Ma, the granites from Changchungou have ages of 411 +/- 5Ma and 406 +/- 3Ma, the quartz diorite from northern Mangya Town has an age of 466 5Ma, and the granite from Akalongshan has an age of 469 +/- 6Ma. The zircon Lu-Hf isotope analysis indicates that most epsilon(Hf) (t) values of the granites are positive except a small number of inherited zircons being negative, reflecting that their source rocks mainly derived from the newly grown crust, but also mixed with a small amount of the component of the ancient continental crust. With the regional geology and the geochemical characteristics being taken into account, the Palaeozoic granitic magmatism in the Mangya area, southern Altun was divided into three sequences, corresponding to three rock assemblages, respectively. The first rock assemblage (465 similar to 469Ma) is quartz diorite + granodiorite + granite, which has the geochemical characteristics of island arc igneous rocks and whose formation is probably related to the subduction of the oceanic crust; the second rock assemblage (404 similar to 411Ma) is granodiorite + monzogranite + syenogranite, which has the geochemical characteristics of A-type granite and which may be related to the balancing adjustment of masses in the orogenic belt after plate collision, and the third rock assemblage (264Ma) is quartz diorite + monzonitic granite + syenogranite, which also has the characteristics of I-type granite and which may be associated with the activity of the Altun fault.
学科主题	火成岩岩石学
WOS关键词	LACHLAN FOLD BELT ; ALTYN TAGH FAULT ; ND ISOCHRON AGE ; NORTHWEST CHINA ; WESTERN CHINA ; HIGH-PRESSURE ; ARC MAGMAS ; SM-ND ; GEOCHEMICAL CHARACTERISTICS ; GEOLOGICAL SIGNIFICANCE
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000340023300014
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40589]
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.Univ Wyoming, Laramie, WY 82071 USA 3.Wooden, Joseph L.] Stanford Univ, Stanford, CA 94305 USA 4.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Wu CaiLai,Gao YuanHong,Lei Min,et al. Zircon SHRIMP U-Pb dating, Lu-Hf isotopic characteristics and petrogenesis of the Palaeozoic granites in Mangya area, southern Altun, NW China[J]. ACTA PETROLOGICA SINICA,2014,30(8):2297-2323.
APA	Wu CaiLai.,Gao YuanHong.,Lei Min.,Qin HaiPeng.,Liu ChunHua.,...&Wooden, Joseph L..(2014).Zircon SHRIMP U-Pb dating, Lu-Hf isotopic characteristics and petrogenesis of the Palaeozoic granites in Mangya area, southern Altun, NW China.ACTA PETROLOGICA SINICA,30(8),2297-2323.
MLA	Wu CaiLai,et al."Zircon SHRIMP U-Pb dating, Lu-Hf isotopic characteristics and petrogenesis of the Palaeozoic granites in Mangya area, southern Altun, NW China".ACTA PETROLOGICA SINICA 30.8(2014):2297-2323.