Detrital Heavy Mineral Constraints on the Triassic Tectonic Evolution of the West Qin ling Terrane, NW China: Implications for Understanding Subduction of the Paleotethyan Ocean

doi:10.1086/677264

	Detrital Heavy Mineral Constraints on the Triassic Tectonic Evolution of the West Qin ling Terrane, NW China: Implications for Understanding Subduction of the Paleotethyan Ocean
	Yan, Zhen 1,2; Guo, Xianqing 3; Fu, Changlei 1; Aitchison, Jonathan 2; Wang, Zongqi 3; Li, Jiliang 4
刊名	JOURNAL OF GEOLOGY
	2014-09-01
卷号	122 期号:5 页码:591-607
ISSN号	0022-1376
DOI	10.1086/677264
文献子类	Article
英文摘要	We have examined the Triassic sediments in the west Qin ling terrane, northeastern Tibet. These sediments consist mainly of flysch and shallow-sea and fluvial deposits with abundant lithic and heavy mineral detritus, sandwiched between and overlying Late Paleozoic and Early-Middle Triassic ophiolitic m langes. Volcanic and metamorphic detritus dominates the lithic component of Lower Triassic sandstones accompanied by high Cr-spinel, pyroxene, and magnetite contents, indicating a mixed ophiolite and metamorphic source. Detrital mineral geochemistry further suggests that ophiolitic, high-grade metamorphic, basic, and intermediate-acidic igneous rocks must have been exposed and deeply eroded in their source area. Abundances of zircon, rutile, garnet, tourmaline, and epidote are greater in the Middle Triassic samples, and granitic and volcanic sources are the major contributors of detrital clasts. Considering these new observations on sedimentary petrography and detrital heavy mineral geochemistry, along with published data on paleocurrents, detrital zircon U-Pb ages, sedimentary facies, and regional magmatism, we suggest that these Triassic sediments represent the sedimentary fill of a forearc basin that overlies a late Paleozoic ophiolitic complex. A south-facing Andean-type convergent continental margin system developed along the southern margin of the North China block during the Triassic, in response to northward subduction of the Paleotethyan Ocean.
WOS关键词	SONGPAN-GANZI COMPLEX ; U-PB ; CHROMIAN SPINEL ; NORTH-SEA ; GEOCHRONOLOGICAL CONSTRAINTS ; CLINOPYROXENE COMPOSITION ; TERTIARY SANDSTONES ; NORTHEASTERN MARGIN ; SOUTHERN MARGIN ; QINLING TERRANE
WOS研究方向	Geology
语种	英语
出版者	UNIV CHICAGO PRESS
WOS记录号	WOS:000342508000006
资助机构	National Natural Science Foundation of China(41372207 ; National Natural Science Foundation of China(41372207 ; Key Program of the Ministry of Land and Resources of China(1212010911033 ; Key Program of the Ministry of Land and Resources of China(1212010911033 ; China Scholarship Council Scholarship Program ; China Scholarship Council Scholarship Program ; 41190072 ; 41190072 ; 1212011120159) ; 1212011120159) ; 41772178 ; 41772178 ; 41272221) ; 41272221) ; National Natural Science Foundation of China(41372207 ; National Natural Science Foundation of China(41372207 ; Key Program of the Ministry of Land and Resources of China(1212010911033 ; Key Program of the Ministry of Land and Resources of China(1212010911033 ; China Scholarship Council Scholarship Program ; China Scholarship Council Scholarship Program ; 41190072 ; 41190072 ; 1212011120159) ; 1212011120159) ; 41772178 ; 41772178 ; 41272221) ; 41272221) ; National Natural Science Foundation of China(41372207 ; National Natural Science Foundation of China(41372207 ; Key Program of the Ministry of Land and Resources of China(1212010911033 ; Key Program of the Ministry of Land and Resources of China(1212010911033 ; China Scholarship Council Scholarship Program ; China Scholarship Council Scholarship Program ; 41190072 ; 41190072 ; 1212011120159) ; 1212011120159) ; 41772178 ; 41772178 ; 41272221) ; 41272221) ; National Natural Science Foundation of China(41372207 ; National Natural Science Foundation of China(41372207 ; Key Program of the Ministry of Land and Resources of China(1212010911033 ; Key Program of the Ministry of Land and Resources of China(1212010911033 ; China Scholarship Council Scholarship Program ; China Scholarship Council Scholarship Program ; 41190072 ; 41190072 ; 1212011120159) ; 1212011120159) ; 41772178 ; 41772178 ; 41272221) ; 41272221)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/86051]
专题	中国科学院地质与地球物理研究所
通讯作者	Yan, Zhen
作者单位	1.Chinese Acad Geol Sci, Inst Geol, State Key Lab Continental Tecton & Dynam, Beijing 100037, Peoples R China 2.Univ Sydney, Sch Geosci, Sydney, NSW 2006, Australia 3.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Yan, Zhen,Guo, Xianqing,Fu, Changlei,et al. Detrital Heavy Mineral Constraints on the Triassic Tectonic Evolution of the West Qin ling Terrane, NW China: Implications for Understanding Subduction of the Paleotethyan Ocean[J]. JOURNAL OF GEOLOGY,2014,122(5):591-607.
APA	Yan, Zhen,Guo, Xianqing,Fu, Changlei,Aitchison, Jonathan,Wang, Zongqi,&Li, Jiliang.(2014).Detrital Heavy Mineral Constraints on the Triassic Tectonic Evolution of the West Qin ling Terrane, NW China: Implications for Understanding Subduction of the Paleotethyan Ocean.JOURNAL OF GEOLOGY,122(5),591-607.
MLA	Yan, Zhen,et al."Detrital Heavy Mineral Constraints on the Triassic Tectonic Evolution of the West Qin ling Terrane, NW China: Implications for Understanding Subduction of the Paleotethyan Ocean".JOURNAL OF GEOLOGY 122.5(2014):591-607.