| 摘要: |
| 西藏纳当地区石炭系永珠组主要为浅变质的砂板岩组合,断层和褶皱非常发育的特征。依据岩石和构造特征可以把区内永珠组分成上、中、下三段。永珠组形成于拉张的被动大陆边缘向裂谷转换的次深海环境,并于中晚二叠世至晚三叠世期间经历了三个构造演化阶段。 |
| 关键词: 西藏 纳当地区 永珠组 构造变形特征 |
| DOI： |
| 附件 |
|
| 基金项目:中国地质调查局项目“西藏普迟亚地区矿产远景调查” |
|
| Structural deformation in the Yunzhug Formation in the Nadang region,Xizang |
| LI Jun-min, ZHENG Lai-lin, LONG Bin, XIA Xiang-biao |
(1. Chengdu Institute of Geology and Mineral Resources, Chengdu 610082, Sichuan, China;
2. Panxi Geological Party, Xichang 615000, Sichuan, China) |
| Abstract: |
| The epimetamorphic sandstone and slate associations,two-component interbeds,faults and folds are well developed in the Carboniferous Yunzhug Formation in the Nadang region,Xizang.The Yunzhug Formation may be divided,in the light of textures and structures of the rocks,into the upper,middle and lower members,and spanned three phases of tectonic evolution during the Middle-Late Permian to the Late Triassic.The regional geological data have revealed that the Yunzhug Formation was once laid down in the extensional passive continental margin bathyal environment. |
| Key words: Xizang Nadang region Yunzhug Formation structural deformation |
