| 青藏高原东北缘现今构造变动与地震活动特征 |
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| 关键词:northeastern margin of Tibetan Plateau recent tectonic deformation earthquake |
| 基金项目:地震科学联合基金项目(编号:104011);中国地震局“十五”重点科研项目(编号:1005010504);国家重点基础研究项目“大陆强震机理与预测”(编号:G1998040703) |
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| 摘要: |
| Characteristics of Recent Tectonic Deformation and Seismic Activity in the Northeastern Margin of Tibetan Plateau |
| Using observatory data of precise level networks and cross-fault mobile monitoring nets obtained since 1970′s as well as precise data observed by GPS in the past 10 years in the northeastern margin of Tibetan Plateau, combined with geological structure and seismic activities, the authors studied some features and preliminary mechanism of recent tectonic deformation and strong earthquake activities. Some conclusions have been reached: ① Recent tectonic deformation of this area shows spatial inhomogeneity and temporal unbalance, reflecting the general trend of inheritance since the new tectonic period. ② The abnormally quick uplifting region and its associated high-gradient deformation zone as well as obvious abnormality of fault activity are symbols of strong earthquakes, and earthquakes commonly take place in and near the region with high strain accumulation. ③ Violent compression of Indian Plate against Tibetan Plateau is the main dynamic environment for tectonic deformation and seismic activities of this area; tectonic deformation and earthquakes have close relationship to the evolution of regional tectonic strain field. |
| WANG Shuang-xu,ZHANG Xi,ZHANG Si-xin,ZHANG Xiao-liang,XUE Fu-ping.2005.Characteristics of Recent Tectonic Deformation and Seismic Activity in the Northeastern Margin of Tibetan Plateau[J].Acta Geoscientica Sinica,26(3):209-216. |
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