SHIRIMP zircon U-Pb dating of the Gangou granitoids, central Tianshan Mountains, northwest China and tectonic significances

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	SHIRIMP zircon U-Pb dating of the Gangou granitoids, central Tianshan Mountains, northwest China and tectonic significances
	Shi, YR (Shi YuRuo); Liu, DY (Liu DunYi); Zhang, Q (Zhang Qi); Ping, JA (Jian Ping); Zhang, FQ (Zhang FuQin); Miao, LC (Miao LaiCheng)
刊名	CHINESE SCIENCE BULLETIN
	2007
卷号	52 期号:11 页码:1507-1516
关键词	SHRIMP dating granitoids Gangou Xinjiang
ISSN号	1001-6538
英文摘要	Two types of granitoids, highly deformed augen granitoids and undeformed fine-grained granitoids, are widely distributed in Gangou area, Central Tianshan Mountains, Northwest China. The augen granitoids are high-K calc-alkaline characterized by high K(2)O, Rb, Y and Th, and low Sr and Sr/Y They also have high contents of large ion lithophile elements (LILE), such as Ba, Rb, K and Th, and relatively low contents of high field strength elements (HFSE), such as Zr, Y and Nb. The fine-grained granitoids are calc-alkaline characterized by high Sr, low Y and HREE, similar to adakitic rocks, and with Na(2)O/K(2)O < 2 (1.76-1.91), high, I(Sr) (0.70689-0.70981), and negative epsilon(Nd)(t) (-2.4--5.3). High-precision SHRIMP U-Pb zircon dating results indicate that the Gangou augen granitiods were formed at 428 +/- 10 Ma, and the fine-grained granitoids were emplaced at 361-368 Ma. These geochemical and U-Pb zircon data have significant implications for the timing of closure of the Mishigou-Gangou Ocean and the evolution of the Central Tianshan orogenic belt.
学科主题	火成岩岩石学
WOS关键词	LOWER CONTINENTAL-CRUST ; CENTRAL-ASIA ; SUBDUCTED LITHOSPHERE ; COLLISIONAL TECTONICS ; SOUTHERN TIANSHAN ; TIEN-SHAN ; EVOLUTION ; GROWTH ; ROCKS ; ADAKITES
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000247578100011
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38522]
专题	中国地质调查局
作者单位	Chinese Acad Geol Sci, Inst Geol, Beijing SHRIMP Ctr, Beijing 100037, Peoples R China Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Shi, YR ,Liu, DY ,Zhang, Q ,et al. SHIRIMP zircon U-Pb dating of the Gangou granitoids, central Tianshan Mountains, northwest China and tectonic significances[J]. CHINESE SCIENCE BULLETIN,2007,52(11):1507-1516.
APA	Shi, YR ,Liu, DY ,Zhang, Q ,Ping, JA ,Zhang, FQ ,&Miao, LC .(2007).SHIRIMP zircon U-Pb dating of the Gangou granitoids, central Tianshan Mountains, northwest China and tectonic significances.CHINESE SCIENCE BULLETIN,52(11),1507-1516.
MLA	Shi, YR ,et al."SHIRIMP zircon U-Pb dating of the Gangou granitoids, central Tianshan Mountains, northwest China and tectonic significances".CHINESE SCIENCE BULLETIN 52.11(2007):1507-1516.