| 刘德民.西藏定结地区变质核杂岩研究[J].地质找矿论丛,2003,(1):1-5 |
| 西藏定结地区变质核杂岩研究 |
| THE RESEARCH ABOUT EXTENSIONAL METAMOPHIC CORE COMPLEXES IN DINGJIE, XIZANG |
| 投稿时间：2002-06-09 修订日期：2002-09-27 |
| DOI：10.6053/j.issn.1001-1412.2003.1. 001 |
| 中文关键词: 喜马拉雅造山带 伸展构造 变质核杂岩 定结地区 西藏自治区 |
| 英文关键词:Himalayan orogen belt stretching structure metamorphic core complex Tibet Dingjie area Xizang |
| 基金项目:国土资源部1:25万定结幅(H45C004003)区域地质调查项目(200013000145)资助. |
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| 中文摘要: |
| 喜马拉雅造山带定结地区近EW向展布两条变质核杂岩带:高喜马拉雅变质核杂岩带和拉轨岗日—孜松变质核杂岩带,在研究区以拉轨岗日—孜松变质核杂岩为典型代表.该变质核杂岩带由多个变质核杂岩体组成,各变质核杂岩体具典型的三层结构.核部由两期(加里东期和喜山期)花岗岩和拉轨岗日群变质岩组成;拆离断层、韧性剪切带及糜棱岩带组成滑脱层;盖层由二叠系、三叠系浅变质岩或未变质的沉积岩系组成. |
| 英文摘要: |
| Two metamorphic core complexes zones exhibit rough East-West trending in Dingjie district in Himalayan orogen belt, i.e. the High Himalayan metamorphic core complex zone and Laguigangri-Zisong metamorphic core complex zone. The latter consists of two metamorphic core complex bodies characterized by typical three-layer framework.The nucleus is made up of twice periods of granite and Laguigangri Group's metamorphic rocks;and detachment zone, ductile shear zone and mylonite zone form the decollement zone;the caprock is constituted by sedimentary rock series of Permian and Triassic. |
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