Silurian clastic sediments in the North Qilian Shan, NW China Chemical and isotopic constraints on their forearc provenance with implications for the Paleozoic evolution of the Tibetan Plateau

doi:10.1016/j.sedgeo.2010.09.001

	Silurian clastic sediments in the North Qilian Shan, NW China Chemical and isotopic constraints on their forearc provenance with implications for the Paleozoic evolution of the Tibetan Plateau
	Yan, Z.1; Xiao, W. J.2; Windley, B. F.3; Wang, Z. Q.4; Li, J. L.2
刊名	SEDIMENTARY GEOLOGY
	2010-11-15
卷号	231 期号:3-4 页码:98-114
关键词	Submarine fan conglomerates Silurian Forearc basin Qilanshan Tibetan Plateau
ISSN号	0037-0738
DOI	10.1016/j.sedgeo.2010.09.001
文献子类	Article
英文摘要	The North Qilian Shan is an accretion-collision orogenic belt in the northeastern margin of the Tibetan Plateau that connects the North China plate to the north with the Tethyan orogenic assemblage to the south Its Early Paleozoic temporal-spatial tectonic evolution has been extensively studied but the nature and tectonic setting of its Silurian deposition is poorly understood Our new petrological analysis suggests that the clast composition of fan conglomerates is complex In the Danbanshan and Zhongdabanshan sections abundant lenticular conglomerate beds contain mainly subrounded-rounded metamorphic clasts whereas the Tongziba and Haichaoba sections contain volcanic chert limestone ultramafic and granitoid clasts However in the Sunan area clast types are relatively simple dominated by basalt and granitoids and at Tongziba gabbro and basalt clasts are subrounded and angular indicating two different types of provenance Ultramafic limestone and abundant chert clasts in the Haichaoba and Tonghe conglomerates indicate an ophiolitic source whereas subrounded-rounded quartzite and granitoid gneiss clasts were probably derived from the Central Qilian basement Geochemical data from the volcanic and granitoid clasts suggest an arc-related source and their zircon U-Pb ages of 515-429 Ma suggest that the arc magmatism did not end in the Mid-Silurian Sandstone petrology and detrital modes suggest that the Silurian sediments were deposited in a forearc basin Paleogeographic reconstructions inferred from NNW-NNE paleocurrent data indicate that an Island arc was present off the southern margin of the Silurian basin and that southward subduction of oceanic crust between North China and the Qilian Shan was active or continued in the Silurian Crown Copyright C 2010 Published by Elsevier BV All nghts reserved
WOS关键词	VOLCANIC-ROCKS ; DETRITAL MODES ; WESTERN KUNLUN ; ACCRETIONARY TECTONICS ; OCEANIC SUBDUCTION ; BASALTIC LAVAS ; MAGMA GENESIS ; ISLAND-ARC ; ALTYN TAGH ; MANTLE
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000284435000005
资助机构	National Natural Science Foundation of China(40772137 ; National Natural Science Foundation of China(40772137 ; Geological Surveying Project of China(1212010911033) ; Geological Surveying Project of China(1212010911033) ; 40725009) ; 40725009) ; National Natural Science Foundation of China(40772137 ; National Natural Science Foundation of China(40772137 ; Geological Surveying Project of China(1212010911033) ; Geological Surveying Project of China(1212010911033) ; 40725009) ; 40725009) ; National Natural Science Foundation of China(40772137 ; National Natural Science Foundation of China(40772137 ; Geological Surveying Project of China(1212010911033) ; Geological Surveying Project of China(1212010911033) ; 40725009) ; 40725009) ; National Natural Science Foundation of China(40772137 ; National Natural Science Foundation of China(40772137 ; Geological Surveying Project of China(1212010911033) ; Geological Surveying Project of China(1212010911033) ; 40725009) ; 40725009)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/72034]
专题	中国科学院地质与地球物理研究所
通讯作者	Yan, Z.
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England 4.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Yan, Z.,Xiao, W. J.,Windley, B. F.,et al. Silurian clastic sediments in the North Qilian Shan, NW China Chemical and isotopic constraints on their forearc provenance with implications for the Paleozoic evolution of the Tibetan Plateau[J]. SEDIMENTARY GEOLOGY,2010,231(3-4):98-114.
APA	Yan, Z.,Xiao, W. J.,Windley, B. F.,Wang, Z. Q.,&Li, J. L..(2010).Silurian clastic sediments in the North Qilian Shan, NW China Chemical and isotopic constraints on their forearc provenance with implications for the Paleozoic evolution of the Tibetan Plateau.SEDIMENTARY GEOLOGY,231(3-4),98-114.
MLA	Yan, Z.,et al."Silurian clastic sediments in the North Qilian Shan, NW China Chemical and isotopic constraints on their forearc provenance with implications for the Paleozoic evolution of the Tibetan Plateau".SEDIMENTARY GEOLOGY 231.3-4(2010):98-114.