Study on the Dapinggou ductile-brittle deformation belt in northern Altun margin area, NW China

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	Study on the Dapinggou ductile-brittle deformation belt in northern Altun margin area, NW China
	Chen, BL (Chen BaiLin); Wang, SX (Wang ShiXin); Qi, WX (Qi WangXiu); Chen, ZL (Chen ZhengLe); Liu, R (Liu Rong); Yang, F (Yang Feng); Jiang, RB (Jiang RongBao); Li, L (Li Li); Yang, Y (Yang Yi); Li, XZ (Li XueZhi)
刊名	ACTA PETROLOGICA SINICA
	2008
卷号	24 期号:4 页码:637-644
关键词	ductile-brittle deformation belt shear-compressional mechanical property Dapinggou southern Altun margin area
ISSN号	1000-0569
英文摘要	The Dapinggou ductile-brittle deformation belt outcrops among the brown-red K-feldspar gneiss of the Late Archaeozoic Dagelabulake Group, being nearby the northern side of the northern Altun fault and about 50km far away from Xorkol part of the Altun strike-slip fault. The belt dips to Southern at a high-angle of 65 similar to 85 degrees with an EW-trending. Each second-order ductile-brittle deformation belt trends EW to NWW trending wavy, with a hundreds meter length and tens meter width. There develops lineation and foliation in the belt and an obvious intragranular deformation of minerals, such as quartz and K-feldspar. Synkinematic recrystallized sericite well develops inner deformed rocks. The mechanical property of the belt is ductile-brittle shear-compressional deformation. There developed kinds of mylonite, specially, the K-feldspar porphyroid - bearing sericite quartz mylonite is common sight in the belt. Analysis of petro-fabrics shows that the quartz is mainly deformed along its basal or basal-near glide system, witch indicates that the deformation temperature is about 250 similar to 350 degrees C. Finite strain measurement shows that the strain ellipsoid axis ratio ( Rxz) is 2. 9 similar to 4. 8. The differential stress value is measured about 59 similar to 61 MPa and the sense of movement is right-lateral thrusting with a NNW-trending maximum compressive stress. Combining to the geotectonic evolution, the authors consider that the Dapinggou ductile-brittle deformation belt developed under the geotectonic setting of collision of plates in the early Paleozoic, indicated the deformation feature of basement rock under the collision process.
学科主题	构造地质学
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000256696700002
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38794]
专题	中国地质调查局
作者单位	Inst Xinjiang Geol Survey Res, Urumqi 830011, Peoples R China
推荐引用方式 GB/T 7714	Chen, BL ,Wang, SX ,Qi, WX ,et al. Study on the Dapinggou ductile-brittle deformation belt in northern Altun margin area, NW China[J]. ACTA PETROLOGICA SINICA,2008,24(4):637-644.
APA	Chen, BL .,Wang, SX .,Qi, WX .,Chen, ZL .,Liu, R .,...&Li, XZ .(2008).Study on the Dapinggou ductile-brittle deformation belt in northern Altun margin area, NW China.ACTA PETROLOGICA SINICA,24(4),637-644.
MLA	Chen, BL ,et al."Study on the Dapinggou ductile-brittle deformation belt in northern Altun margin area, NW China".ACTA PETROLOGICA SINICA 24.4(2008):637-644.