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| 西藏拉轨岗日构造带孔木韧性剪切带特征 |
| 李建忠,王安华,冯心涛,邹光富,朱同兴 |
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(1. 成都理工大学 地球科学院, 四川 成都 610059;
2. 成都地质矿产研究所, 四川 成都 610082;
3. Guizhou Institute of Geological Survey, Guiyang 550000, Guizhou, China) |
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| 摘要: |
| 在拉轨岗日构造带佩枯错新发现了一条韧性剪切带,至少存在3期变形。韧性剪切作用可能与应变能转化的热能有关,应变能常沿断裂集中,形成方解石脉;然后,经由北往南的逆冲推覆,形成(叠瓦状)逆冲推覆构造;最后,由于山体重力势能的作用,伸展跨塌。该剪切带成为藏南拆离系的组成部分。 |
| 关键词: 拉轨岗日 韧性剪切带 西藏 |
| DOI： |
| 附件 |
| 投稿时间：2004-10-15 |
| 基金项目:中国地质调查局1:25万聂拉木县幅区域地质调查项目(19911300009031)。 |
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| The deformation of the Kungmu ductile shear zone in the Lhagoi Kangri tectonic zone, Xizang |
| LI Jian-zhong, WANG An-hua, FENG Xin-tao, ZOU Guang-fu, ZHU Tong-xing |
(1. Chengdu University of Technology, Chengdu 610059, Sichuan, China;
2. Chengdu Institute of Geology and Mineral Resources, Chengdu 610082, Sichuan, China;
3. Guizhou Institute of Geological Survey, Guiyang 550000, Guizhou, China) |
| Abstract: |
| There exists a ductile shear zone in the Paikuco region in the Lhagoi Kangri tectonic zone, where at least three stages of deformation are recognized, including Stage 1, which may be related to the concentration of strain energy in the Kungmu ductile shear zone and associated with the formation of calcite veins and partial melting; Stage 2, during which the overthrusting southwards may result in the formation of imbricated overthrust sheets, associated with the deformation of the calcite veins and magmatism, and Stage 3, during which N-S-trending extension and collapse of the shear zone occurs as part of the South Tibet Detachment System. |
| Key words: Lhagoi Kangri ductile shear zone Xizang |