|
|||||
|
|
| 川滇块体的侧向挤出问题 | |
| 引用本文： | 汪一鹏,沈军,王琪,熊熊.川滇块体的侧向挤出问题[J].地学前缘,2003,10(Z1):188-192. |
| 作者姓名： | 汪一鹏 沈军 王琪 熊熊 |
| 作者单位： | 1. 中国地震局,地质研究所,北京,100029 2. 新疆地震局,新疆,乌鲁木齐,830011 3. 中国地震局,地震研究所,湖北,武汉,430071 4. 中国科学院,测量与地球物理研究所,湖北,武汉,430077 |
| 摘 要： | 基于活动断裂长期平均滑动速率和GPS观测结果计算所得的中国大陆活动地块运动矢量图 ,认为青藏高原存在向东侧向挤出 ,但达不到“大陆逃逸”假说所设想的规模。高原挤出的南边界可能由一组断续、分散的右旋走滑断裂承担 ,而不像是连续、单一的喀喇昆仑 -嘉黎 -红河断裂带的样式 ,而且滑动速率较低。川滇地块是高原侧向挤出最突出的块体 ,它向南南东方向较强的挤出可能与川滇地区岩石圈强度的差异有关。 |
| 关 键 词： | 青藏高原 侧向挤出 岩石圈强度 |
| 文章编号： | 1005-2321(2003)S0-0188-05 |
| 修稿时间： | 2003年5月23日 |
ON THE LATERAL EXTRUSION OF SICHUAN-YUNNAN BLOCK (CHUANDIAN BLOCK) |
|
| WANG Yi-peng ,SHEN Jun ,WANG Qi ,XIONG Xiong.ON THE LATERAL EXTRUSION OF SICHUAN-YUNNAN BLOCK (CHUANDIAN BLOCK)[J].Earth Science Frontiers,2003,10(Z1):188-192. | |
| Authors: | WANG Yi-peng SHEN Jun WANG Qi XIONG Xiong |
| Institution: | WANG Yi-peng 1,SHEN Jun 2,WANG Qi 3,XIONG Xiong 4 |
| Abstract: | The vector map of crustal block’s motion in China Continent calculated from the long-term average slip rates of active faults and GPS survey data show that the eastward extrusion of the Qinghai-Xizang Plateau does exist, but its magnitude is not so large as that estimated by the continental escape hypothesis. The southern lateral extrusion boundary of the Plateau may consist of a set of discontinuous, scattered dextral strike-slip faults whose slip-rate is lower than 5 mm/a, rather than a continuous, single Karakoram-Jiali-Honghe fault zone. Chuandian(Sichuan-Yunnan) block is the most outstanding one among the lateral extrusion blocks in the Plateau, its south-south-eastward extrusion may be related to the difference between the lithospheric strength in Sichuan-Yunnan region. |
| Keywords: | Qinghai-Xizang Plateau lateral extrusion lithospheric strength |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |