Petrology and geochemistry of Early Permian volcanic rocks in South Tian   Shan, NW China: implications for the tectonic evolution and Phanerozoic   continental growth

doi:10.1007/s00531-013-0994-1

CORC > 北京大学 > 地球与空间科学学院

	Petrology and geochemistry of Early Permian volcanic rocks in South Tian Shan, NW China: implications for the tectonic evolution and Phanerozoic continental growth
	Liu, Dongdong ; Guo, Zhaojie ; Jolivet, Marc ; Cheng, Feng ; Song, Yan ; Zhang, Ziya
刊名	international journal of earth sciences
	2014
关键词	South Tian Shan Early Permian Volcanic rocks Geochemistry Petrology Reworking of ancient lithosphere ASIAN OROGENIC BELT A-TYPE GRANITES U-PB TIEN-SHAN TRACE-ELEMENT NORTHWESTERN CHINA WESTERN TIANSHAN CRUSTAL GROWTH TARIM BASIN ISOTOPIC GEOCHEMISTRY
DOI	10.1007/s00531-013-0994-1
英文摘要	Situated in the southwest of the Central Asian Orogenic Belt (CAOB), the South Tian Shan (STS) Block is a key area for understanding the final accretion of the CAOB. A suite of volcanic rocks interbedded with continental sediments from the Xiaotikanlike Formation lies along the southwestern edge of the Tian Shan orogen. Laser-ablation-inductively coupled plasma-mass spectrometer U-Pb dating provided a crystallization age of 295.0 +/- A 2.8 Ma (MSWD = 1.3), suggesting an Early Permian magmatic event. The volcanic rocks show a variable composition, with dominant rhyolites and dacites, subordinate basaltic andesites and few basalts. The felsic rocks are enriched in K and exhibit remarkably negative anomalies in Ba, Sr, Eu, P and Ti. These anomalies associated with their high negative epsilon (Nd)(t) values and old Nd model ages suggest that they are most likely sourced from ancient lower crustal rocks. The mafic rocks are characterized by high Mg#, Cr, Ni contents, negative Nb, Ta anomalies and pronounced enrichment in light rare earth elements as well as mild enrichment in large-ion lithophile elements. The mafic rocks are thus inferred to derive from enriched subcontinental lithospheric mantle. The petrographic and geochemical characteristics of the Xiaotikanlike Formation volcanic rocks indicate that they were generated under a post-collisional regime. Therefore, the final collision between the Tarim Craton and the Kazakhstan-Yili terrane took place before Early Permian, most probably at Late Carboniferous. Differing from other tectonic units of the CAOB, the recycling of ancient lithospheric crust played a significant role in the continental growth of the STS Block.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000333129100009&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Geosciences, Multidisciplinary; SCI(E); 6; ARTICLE; zjguo@pku.edu.cn; 3; 737-756; 103
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/155523]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Liu, Dongdong,Guo, Zhaojie,Jolivet, Marc,et al. Petrology and geochemistry of Early Permian volcanic rocks in South Tian Shan, NW China: implications for the tectonic evolution and Phanerozoic continental growth[J]. international journal of earth sciences,2014.
APA	Liu, Dongdong,Guo, Zhaojie,Jolivet, Marc,Cheng, Feng,Song, Yan,&Zhang, Ziya.(2014).Petrology and geochemistry of Early Permian volcanic rocks in South Tian Shan, NW China: implications for the tectonic evolution and Phanerozoic continental growth.international journal of earth sciences.
MLA	Liu, Dongdong,et al."Petrology and geochemistry of Early Permian volcanic rocks in South Tian Shan, NW China: implications for the tectonic evolution and Phanerozoic continental growth".international journal of earth sciences (2014).