Structure, kinematics and ages of transpression during strain-partitioning in the Chongshan shear zone, western Yunnan, China

doi:10.1016/j.jsg.2010.02.001

	Structure, kinematics and ages of transpression during strain-partitioning in the Chongshan shear zone, western Yunnan, China
	Zhang, Bo 1; Zhang, Jinjiang 1; Zhong, Dalai 2
刊名	JOURNAL OF STRUCTURAL GEOLOGY
	2010-04-01
卷号	32 期号:4 页码:445-463
关键词	Kinematics Geochronology Transpression Chongshan Shear Zone Western Yunnan
ISSN号	0191-8141
DOI	10.1016/j.jsg.2010.02.001
文献子类	Article
英文摘要	The Chongshan shear zone extends from the eastern Himalayan Syntax's to the Lincang Granitic pluton in Yunnan Province, China. The structure and kinematics show that the shear zone comprises mainly of mylonitic gneiss - migmatite and schist with a dextral-dominated strike-slip motion in an N-S trending northern segment, and a sinistral strike-slip shear in NW SE trending middle and southern segments. Both were developed under a bulk, regional-scale sinistral transpression. SHRIMP and LA-ICPMS U-Pb and (40)Ar/(39)Ar dating reveal two Tertiary magmatic events along the zone, followed by younger mistral strike-slip shear. The Eocene magmatic event (c 55-38 Ma). followed by metamorphism at c. 36 Ma. happened before the strike-slip motion The strike-slip shear along the zone began c 32 Ma, which generated shear heating from 32 to 22 Ma. The (40)Ar/(39)Ar ages of syn-kinematic micas, range from 19 to 14 Ma. and indicate that the strike-slip shear continued to this time with coeval transpressional exhumation and uplift of the metamorphic rocks along the Biluoxueshan-Chongshan chain. The Chongshan zone is thus a Cenozoic shear zone, which was contemporaneous with motion on the left-lateral Mao Shan-Red River shear zone and the right-lateral Gaoligong shear zone, and should be important in accommodating the northwards movement of India during collision. During Oligocene to Miocene times, the continental block that was extruded between the Ailao Shan-Red River and Gaoligong shear zones was dismembered into at least two major fragments by the Chongshan shear zone (C) 2010 Elsevier Ltd. All rights reserved.
WOS关键词	SHAN-RED-RIVER ; INDIA-ASIA COLLISION ; U-TH-PB ; STRIKE-SLIP DUPLEXES ; SE ASIA ; TECTONIC EVOLUTION ; ION MICROPROBE ; CONTINENTAL EXTRUSION ; SOUTHEAST-ASIA ; TRANSTENSION ZONES
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000279567100005
资助机构	National Natural Science Foundation of China(40802050 ; National Natural Science Foundation of China(40802050 ; China Postdoctoral Science Foundation(20070420065) ; China Postdoctoral Science Foundation(20070420065) ; 40872149) ; 40872149) ; National Natural Science Foundation of China(40802050 ; National Natural Science Foundation of China(40802050 ; China Postdoctoral Science Foundation(20070420065) ; China Postdoctoral Science Foundation(20070420065) ; 40872149) ; 40872149) ; National Natural Science Foundation of China(40802050 ; National Natural Science Foundation of China(40802050 ; China Postdoctoral Science Foundation(20070420065) ; China Postdoctoral Science Foundation(20070420065) ; 40872149) ; 40872149) ; National Natural Science Foundation of China(40802050 ; National Natural Science Foundation of China(40802050 ; China Postdoctoral Science Foundation(20070420065) ; China Postdoctoral Science Foundation(20070420065) ; 40872149) ; 40872149)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73080]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhang, Bo
作者单位	1.Peking Univ, Dept Geol, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Bo,Zhang, Jinjiang,Zhong, Dalai. Structure, kinematics and ages of transpression during strain-partitioning in the Chongshan shear zone, western Yunnan, China[J]. JOURNAL OF STRUCTURAL GEOLOGY,2010,32(4):445-463.
APA	Zhang, Bo,Zhang, Jinjiang,&Zhong, Dalai.(2010).Structure, kinematics and ages of transpression during strain-partitioning in the Chongshan shear zone, western Yunnan, China.JOURNAL OF STRUCTURAL GEOLOGY,32(4),445-463.
MLA	Zhang, Bo,et al."Structure, kinematics and ages of transpression during strain-partitioning in the Chongshan shear zone, western Yunnan, China".JOURNAL OF STRUCTURAL GEOLOGY 32.4(2010):445-463.