Geochemistry, geochronology, and tectonic setting of Early Cretaceous   volcanic rocks in the northern segment of the Tan-Lu Fault region,   northeast China

doi:10.1016/j.jseaes.2016.12.025

CORC > 北京大学 > 地球与空间科学学院

	Geochemistry, geochronology, and tectonic setting of Early Cretaceous volcanic rocks in the northern segment of the Tan-Lu Fault region, northeast China
	Ling, Yi-Yun ; Zhang, Jin-Jiang ; Liu, Kai ; Ge, Mao-Hui ; Wang, Meng ; Wang, Jia-Min
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2017
关键词	Jia-Yi Fault Dun-Mi Fault Early Cretaceous Volcanic rock Geochemistry Geochronology A-TYPE GRANITES LACHLAN FOLD BELT PB ISOTOPIC GEOCHEMISTRY LIAO-JI BELT NE CHINA MAFIC DYKES CONTINENTAL-CRUST FRACTIONAL CRYSTALLIZATION CHEMICAL CLASSIFICATION SOUTHEASTERN AUSTRALIA
DOI	10.1016/j.jseaes.2016.12.025
英文摘要	We present new geochemical and geochronological data for volcanic and related rocks in the regions of the Jia-Yi and Dun-Mi faults, in order to constrain the late Mesozoic tectonic evolution of the northern segment of the Tan-Lu Fault. Zircon U-Pb dating shows that rhyolite and intermediate-mafic rocks along the southern part of the Jia-Yi Fault formed at 124 and 113 Ma, respectively, whereas the volcanic rocks along the northern parts of the Jia-Yi and Dun-Mi faults formed at 100 Ma. The rhyolite has an A-type granitoid affinity, with high alkalis, low MgO, Ti, and P contents, high rare earth element (REE) contents and Ga/Al ratios, enrichments in large-ion lithophile (LILEs; e.g., Rb, Th, and U) and high-field-strength element (HFSEs; e.g., Nb, Ta, Zr, and Y), and marked negative Eu anomalies. These features indicate that the rhyolites were derived from partial melting of crustal material in an extensional environment. The basaltic rocks are enriched in light REEs and LILEs (e.g., Rb, K, Th, and U), and depleted in heavy REEs, HFSEs (e.g., Nb, Ta, Ti, and P), and Sr. These geochemical characteristics indicate that these rocks are calc-alkaline basalts that formed in an intraplate extensional tectonic setting. The dacite is a medium to high-K, calc-alkaline, I-type granite that was derived from a mixed source involving both crustal and mantle components in a magmatic arc. Therefore, the volcanic rocks along the Jia-Yi and Dun-Mi faults were formed in an extensional regime at 124-100 Ma (Early Cretaceous), and these faults were extensional strike-slip faults at this time. (c) 2016 Elsevier Ltd. All rights reserved.; Major State Basic Research Development Program of China [2013 CB429804]; Department of Sciences and Technology; Inner Mongolia Autonomous Region, China; SCI(E); ARTICLE; ,SI; 303-322; 144
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/471487]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Ling, Yi-Yun,Zhang, Jin-Jiang,Liu, Kai,et al. Geochemistry, geochronology, and tectonic setting of Early Cretaceous volcanic rocks in the northern segment of the Tan-Lu Fault region, northeast China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2017.
APA	Ling, Yi-Yun,Zhang, Jin-Jiang,Liu, Kai,Ge, Mao-Hui,Wang, Meng,&Wang, Jia-Min.(2017).Geochemistry, geochronology, and tectonic setting of Early Cretaceous volcanic rocks in the northern segment of the Tan-Lu Fault region, northeast China.JOURNAL OF ASIAN EARTH SCIENCES.
MLA	Ling, Yi-Yun,et al."Geochemistry, geochronology, and tectonic setting of Early Cretaceous volcanic rocks in the northern segment of the Tan-Lu Fault region, northeast China".JOURNAL OF ASIAN EARTH SCIENCES (2017).