Intra-continental Dabashan orocline, southwestern Qinling, Central China

CORC > 中国地质调查局 > 中国地质调查局

	Intra-continental Dabashan orocline, southwestern Qinling, Central China
	Shi, W (Shi, Wei); Zhang, YQ (Zhang, Yueqiao); Dong, SW (Dong, Shuwen); Hu, JM (Hu, Jianmin); Wiesinger, M (Wiesinger, Maria); Ratschbacher, L (Ratschbacher, Lothar); Jonckheere, R (Jonckheere, Raymond); Li, JH (Li, Jianhua); Tian, M (Tian, Mi); Chen, H (Chen, Hong)
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2012
卷号	46 页码:20-38
关键词	Dabashan belt Paleostress fields Arc-shape fold belt Superposed deformation Intra-continental orogeny
ISSN号	1367-9120
英文摘要	Using field investigation, structural analysis, and Ar-40-Ar-39 and fission-track geochronology, we synthesize the structural architecture, stress fields, and tectonic evolution of the Dabashan orocline, southwestern Qinling. Three paleostress fields govern deformation The first (Late Triassic to Early Jurassic, T-3-J(1)) reflects similar to N-S to NNE-SSW shortening in the foreland of the Qinling-Dabie orogen and is the result of the collision of the North China and Yangtze blocks; the principal structures in the Dabashan belt are similar to E-trending folds. The second event (Late Jurassic to Early Cretaceous, J(3)-K-1) shows NE-SW shortening; a fold-thrust belt formed with similar to 150 km shortening above a detachment layer at 10-12 km depth. During this event, the Dabashan foreland acquired its convex-to-southwest oroclinal shape. The third event (Late Cretaceous to Paleogene, K-2-E) reflects ENE-WSW or NE-SW extension coeval with the formation of local basins. The Dabashan orocline formed due to pinning of the Qinling-Dabie thrust front at two basement culminations within the subducting Yangtze craton; foreland progradation was made possible by the activation of a Lower-Middle Triassic gypsum-salt detachment of the Sichuan-basin sedimentary pile. During expansion, movements were radially along the orocline. This study gives an example of intra-continental orogeny when terminal deformation is governed by foreland heterogeneities. (C) 2011 Elsevier Ltd. All rights reserved.
学科主题	构造地质学
WOS关键词	APATITE-FISSION-TRACK ; TAN-LU FAULT ; PRESSURE CONTINENTAL-CRUST ; SOUTH CHINA ; EASTERN CHINA ; SICHUAN BASIN ; DABIE SHAN ; PALEOMAGNETIC CONSTRAINTS ; TECTONIC EVOLUTION ; OROGENIC BELT
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000304513800002
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39880]
专题	中国地质调查局
作者单位	Univ Texas Austin, Univ Stn C1100, Dept Geol Sci, Austin, TX 78712 USA
推荐引用方式 GB/T 7714	Shi, W ,Zhang, YQ ,Dong, SW ,et al. Intra-continental Dabashan orocline, southwestern Qinling, Central China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2012,46:20-38.
APA	Shi, W .,Zhang, YQ .,Dong, SW .,Hu, JM .,Wiesinger, M .,...&Li, HL .(2012).Intra-continental Dabashan orocline, southwestern Qinling, Central China.JOURNAL OF ASIAN EARTH SCIENCES,46,20-38.
MLA	Shi, W ,et al."Intra-continental Dabashan orocline, southwestern Qinling, Central China".JOURNAL OF ASIAN EARTH SCIENCES 46(2012):20-38.