Midcrustal shearing and doming in a Cenozoic compressive setting along the Ailao Shan-Red River shear zone

doi:10.1002/2016GC006520

	Midcrustal shearing and doming in a Cenozoic compressive setting along the Ailao Shan-Red River shear zone
	Zhang, B (Zhang, B.)1; Yin, CY (Yin, C. Y.)1; Zhang, JJ (Zhang, J. J.)1; Wang, JM (Wang, J. M.)2; Zhong, DL (Zhong, D. L.)2; Wang, Y (Wang, Y.)1; Lai, QZ (Lai, Q. Z.)3; Yue, YH (Yue, Y. H.)3; Zhou, QY (Zhou, Q. Y.)4; Zhang, B
刊名	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
	2017
卷号	18 期号:1 页码:400-433
关键词	METAMORPHIC CORE COMPLEXES INDIA-ASIA COLLISION SOUTHERN TIBET GNEISS DOMES SE ASIA PREFERRED ORIENTATIONS DETACHMENT FAULTS AR-40/AR-39 GEOCHRONOLOGY DEFORMATION TEMPERATURES CONTINENTAL EXTRUSION
DOI	10.1002/2016GC006520
文献子类	Article
英文摘要	The Cenozoic Xuelong Shan antiformal dome is located along the northern segment of the Ailao Shan-Red River shear zone in Yunnan, China. Subhorizontal foliation in the gneiss core is recognized, representing a broad top-to-NE shear initiated under amphibolite facies conditions and propagating into greenschist facies in the mantling schist and strike-slip shear zone. Microfabrics of crystallographic-preferred orientations (CPOs) in quartz suggest that the deformation temperatures increased with increasing structural depth from the upper crust (300-500 degrees C) in the mantling schist to the midcrust (15 km or more, 650 degrees C) in the gneissic core. This trend is mirrored by variations in the metamorphic grade of the syn-kinematic mineral assemblages and microstructures, which range from garnet+amphibole+biotite+sillimanite+rutile+feldspar in the core to garnet+staurolite+biotite+epidote+muscovite within the limb units. The dome experienced the following deformation history: (1) a broad top-to-NE shear in the subhorizontal foliation of the gneiss core during the first stage of deformation (D1); (2) opposing reverse-sense shear along the two schist limbs of the dome during contraction-related doming (D2-D3); (3) sinistral strike-slip shearing within the eastern limb (D4); and (4) extensional deformation (D5). The structural-thermal patterns suggest the antiformal dome formation was roughly coeval with top-to-NE ductile shearing in the midcrust of Tibet at 32 Ma or earlier. A major implication is that there was a phase of contractional ductile deformation in the region prior to the initiation of strike-slip deformation.
学科主题	地质学
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000395186600023
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/8393]
专题	青藏高原研究所_图书馆
通讯作者	Zhang, B
作者单位	1.Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, Beijing, Peoples R China. 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China. 3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing, Peoples R China. 4.Earthquake Adm Yunnan Prov, Kunming, Peoples R China.
推荐引用方式 GB/T 7714	Zhang, B ,Yin, CY ,Zhang, JJ ,et al. Midcrustal shearing and doming in a Cenozoic compressive setting along the Ailao Shan-Red River shear zone[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2017,18(1):400-433.
APA	Zhang, B .,Yin, CY .,Zhang, JJ .,Wang, JM .,Zhong, DL .,...&Zhang, B.(2017).Midcrustal shearing and doming in a Cenozoic compressive setting along the Ailao Shan-Red River shear zone.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,18(1),400-433.
MLA	Zhang, B ,et al."Midcrustal shearing and doming in a Cenozoic compressive setting along the Ailao Shan-Red River shear zone".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 18.1(2017):400-433.