| 摘要: |
| 藏南拉轨岗日带出露一系列穹状隆起，具有变质核杂岩体典型的3层结构型式。变质核由拉轨岗日岩群变质杂岩及侵入其中的花岗岩组成，围绕变质核发育多层顺层拆离断层，盖层主要为晚古生代和中生代浅变质岩石。拉轨岗日变质核杂岩与高喜马拉雅变质核杂岩之间存在密切的时空联系，是喜马拉雅造山作用及相关隆升作用过程中发生热隆伸展的结果。 |
| 关键词: 变质核杂岩 拆离断层 拉轨岗日 喜马拉雅 |
| DOI： |
| 分类号:P588.3 |
| 基金项目:中国地质调查局“1∶25万定结幅区域地质调查”项目(编号:20001300009231)。 |
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| Definition and significance of the Lhagoi Kangri metamorphic core complexes in Sa''''gya,southern Tibet |
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LI Dewei LIU Demin LIAO Qun''''an ZHANG Xionghua YUAN Yanming
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| Abstract: |
| Several structural domes in Lhagoi Kangri,southern Tibet,show the three-layer structure typi-cal of metamorphic core complexes.The metamorphic cores consist of metamorphic complex rocks of the Lhagoi Kangri Group-complex and granites intruded therein;multi-layer,layering-parallel detachment faults are distributed around the metamorphic cores.The covers mainly include Late Paleozoic-Mesozoic low-grade metamorphic rocks.The Lhagoi Kangri metamorphic core complexes have close temporal-spatial relation to the high Himalayan metamorphic core complexes and the southern Tibetan detachment system and are the result of thermal uplift and extension during the late Cenozoic Himalayan orogeny and its re-lated uplifting. |
| Key words: metamorphic core complexes,detachment fault,Lhagoi Kangri,Himalaya, |
