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| 内蒙古塔木素地区NNE向韧性剪切带发现及变形时代分析 | |
| 引用本文： | 吴凤萍,张维杰,王伟.内蒙古塔木素地区NNE向韧性剪切带发现及变形时代分析[J].新疆地质,2012,30(2):216-220. |
| 作者姓名： | 吴凤萍 张维杰 王伟 |
| 作者单位： | 1. 山东省地质矿产勘查开发局第三地质大队,山东 烟台 264003;中国地质大学(北京)地球科学与资源学院,北京 100083 2. 中国地质大学(北京)地球科学与资源学院,北京,100083 3. 山东省地质矿产勘查开发局第三地质大队,山东 烟台,264003 |
| 基金项目： | 内蒙古1:5万杭嘎勒、哈尔扎盖幅区调(2006-2008)(1212010610419)项目资助 |
| 摘 要： | 塔木素地区NNE向韧性剪切带位于塔里木板块东缘与华北板块西北缘板块碰撞拼接边界,呈NNE向展布,长约9 km,宽150～2 500 m。褶皱的糜棱面理、拉伸线理、旋转残斑、书斜构造、"云母鱼"等构造均指示其为右行逆冲走滑剪切。形成温度为300℃～500℃,围压为250～400 MPa,变形变质作用相当于绿片岩相,差应力(σ)为93.7～116.5 MPa。应变速率(ε)为10-17 s-1(300℃)和10-13 s-1(500℃)。主体变形时间在(256.0±1.3)Ma之后,三叠纪之前,为华力西(海西)运动末期产物。 |
| 关 键 词： | 内蒙古 塔木素 韧性剪切带 变形条件 锆石U-Pb测年 |
Discovery of the NNE Ductile Shear Zone and its Deformation Age Analysis of Tamusu Area,Inner Mongolia |
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| WU Feng-ping , ZHANG Wei-jie , WANG Wei.Discovery of the NNE Ductile Shear Zone and its Deformation Age Analysis of Tamusu Area,Inner Mongolia[J].Xinjiang Geology,2012,30(2):216-220. | |
| Authors: | WU Feng-ping ZHANG Wei-jie WANG Wei |
| Institution: | 1(1.Geological Team No.3,Shandong Bureau of Geology,Mineral Resources and Development,Yantai,Shandong,264003,China;2.School of the Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing,100083,China) |
| Abstract: | NNE-trending ductile shear zone of Ta mu su is located at the boundary between on the eastern side of Talimu and on the west-north side of north China blocks collision-amalgamation zone.It extents in a nearly NNE direction with a length of 9 km and a width of 150～2500 m.Structural Styles,including folded mylonitic foliation,mineral lineation,rotational porphyroclast,"domino" structure and "mica fish",indicate a dextral thrusting strike-slip.This ductile shear zone might occur at a metamorphic grade of green-schist facies,temperature at 300～500℃ and pressure at 250～400MPa,The Values of differential structural stresses(σ) are estimated at 93.7～116.5 MPa,Strain rate(ε) is 10-17 s-1(300℃) and 10-13 s-1(500℃).The main ductile shear zone deformation time formed between(256.0±1.3) Ma and the Triassic by comprehensive evaluation,was formed by the late Variscan(Hercynian) movement. |
| Keywords: | Inner Mongolia Ta Musu ductile shear zone Deformation condition Zircon U-Pb Dating |
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