Geochronology and geochemistry of volcanic rocks in the Arbasay   Formation, Xinjiang Province (Northwest China): implications for the   tectonic evolution of the North Tianshan

doi:10.1080/00206814.2016.1185750

CORC > 北京大学 > 地球与空间科学学院

	Geochronology and geochemistry of volcanic rocks in the Arbasay Formation, Xinjiang Province (Northwest China): implications for the tectonic evolution of the North Tianshan
	Wang, Jialin ; Wu, Chaodong ; Li, Zhuang ; Zhu, Wen ; Chen, Yiwen ; Li, Qingyun ; Wu, Jun ; Deng, Langjiang ; Chen, Rong
刊名	INTERNATIONAL GEOLOGY REVIEW
	2017
关键词	Geochronology Geochemistry late Carboniferous volcanism Continental arc North Tianshan PHANEROZOIC CRUSTAL GROWTH U-PB GEOCHRONOLOGY PLASMA-MASS SPECTROMETRY ASIAN OROGENIC BELT LIAO-JI BELT NW-CHINA WESTERN TIANSHAN CALC-ALKALINE CONTINENTAL GROWTH SHRIMP CHRONOLOGY
DOI	10.1080/00206814.2016.1185750
英文摘要	The extensively exposed late Carboniferous volcanic and volcaniclastic successions along the northern margin of the North Tianshan are called the Arbasay Formation. We present field-based mapping, petrography, zircon cathodoluminescence (CL) images, and U-Pb dates, as well as whole-rock geochemical data for these rocks, in order to constrain their formation age and petrogenesis, and understand the geodynamic setting. Conspicuously, the Arbasay Formation shows typical basalt-andesite-dacite-rhyolite volcanic series, and is dominated by andesites with a small amount of basalts and rhyolites based on the geological profile. U-Pb isotopic dating using the LA-ICP-MS method on zircons reveals that the volcanic rocks in the Arbasay Formation formed at 308-305Ma, that is, late Carboniferous, rather than early Permian as previously proposed. Geochemically, the volcanic rocks mainly belong to the calc-alkaline series and have arc-like geochemical compositions. They are enriched in LREEs ((La/Yb)(N)=2.9-7.5) and LILEs (K, Rb, Ba) and depleted in HFSEs (Nb, Ta, Ti). In the tectonic discrimination diagrams, the basalts mainly fall into the area of continental arc. Given our U-Pb dating results, geochemical characteristics, and the regional geological framework, we propose that the late Carboniferous volcanic rocks originated from the arc-related setting, not the intracontinental rift-related setting. They are possibly the major constituents of a continental arc that is formed with the southward subduction of the North Tianshan Oceanic lithosphere.; National Science and Technology Major Project [2016ZX05008001]; SCI(E); REVIEW; 10,SI; 1324-1343; 59
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/475979]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Wang, Jialin,Wu, Chaodong,Li, Zhuang,et al. Geochronology and geochemistry of volcanic rocks in the Arbasay Formation, Xinjiang Province (Northwest China): implications for the tectonic evolution of the North Tianshan[J]. INTERNATIONAL GEOLOGY REVIEW,2017.
APA	Wang, Jialin.,Wu, Chaodong.,Li, Zhuang.,Zhu, Wen.,Chen, Yiwen.,...&Chen, Rong.(2017).Geochronology and geochemistry of volcanic rocks in the Arbasay Formation, Xinjiang Province (Northwest China): implications for the tectonic evolution of the North Tianshan.INTERNATIONAL GEOLOGY REVIEW.
MLA	Wang, Jialin,et al."Geochronology and geochemistry of volcanic rocks in the Arbasay Formation, Xinjiang Province (Northwest China): implications for the tectonic evolution of the North Tianshan".INTERNATIONAL GEOLOGY REVIEW (2017).