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
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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. |
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