Tectonical significance of the Carboniferous volcanic rocks in eastern Tianshan

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	Tectonical significance of the Carboniferous volcanic rocks in eastern Tianshan
	Li, YA (Li Yuan); Yang, JS (Yang JingSui); Zhang, JA (Zhang Jian); Li, TF (Li TianFu); Chen, SY (Chen SongYong); Ren, YF (Ren YuFeng); Xu, XZ (Xu XiangZhen)
刊名	ACTA PETROLOGICA SINICA
	2011
卷号	27 期号:1 页码:193-209
关键词	Volcanic rocks Back-arc ocean basin Geochemical zone Eastern Tianshan Paleo-Asian Ocean
ISSN号	1000-0569
英文摘要	The volcanic rocks of the eastern Tianshan are important for understanding the Paleozoic evolution of Paleo-Asian oceanic. It is bounded to the southern Turfan-Hami basin, and dominated by A'qikekuduke fault. Petrological, isotope chronology and geochemical features of these Carboniferous volcanic rocks show that (1) They belong to the calc-alkaline series. There are two type of basalt N-MORB and TAT in eastern Tianshan, which show that these volcanic rocks were formed in a back-arc ocean basin tectonic environment; (2) In situ zircon U-Pb LA-ICP-MS dating on the rhyolite zircon of Di' kaner Formation yielded an age of the 320 +/- 1. 2Ma(MSWD = 1. 3) in the southern Turfan-Hami basin. This age is explained as the intrusion age of the pluton; (3) Compared with volcanic rocks of the eastern Tianshan and its neighboring areas, we find that geochemical features of the Carboniferous basalts, at similar SiO(2) levels, K(2)O, K(2)O + Na(2) O, K(2)O/Na(2)O, LILE(Rb, Ba, Sr) and HFSE(Nb, Ta, Th, Zr), gradually increase from north to south, show the compositional zone. The geochemical zone is similar to the geochemical polarity in the Mesozoic and Cenozoic circum-Pacific island arc, allow us to infer that geochemical zone can be attributed to the subduction of the Paleo-Asian oceanic plate under the Junggar- Turfan-Hami plate.
学科主题	火成岩岩石学
WOS关键词	CONSTRAINTS ; SUBDUCTION ; BASIN ; ELEMENTS ; BASALTS ; MANTLE ; MARGIN ; OROGEN ; ARC
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000287822100012
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39407]
专题	中国地质调查局
作者单位	CGS, Tianjin Inst Geol & Mineral Resources, Tianjin 300170, Peoples R China
推荐引用方式 GB/T 7714	Li, YA ,Yang, JS ,Zhang, JA ,et al. Tectonical significance of the Carboniferous volcanic rocks in eastern Tianshan[J]. ACTA PETROLOGICA SINICA,2011,27(1):193-209.
APA	Li, YA .,Yang, JS .,Zhang, JA .,Li, TF .,Chen, SY .,...&Xu, XZ .(2011).Tectonical significance of the Carboniferous volcanic rocks in eastern Tianshan.ACTA PETROLOGICA SINICA,27(1),193-209.
MLA	Li, YA ,et al."Tectonical significance of the Carboniferous volcanic rocks in eastern Tianshan".ACTA PETROLOGICA SINICA 27.1(2011):193-209.