| 滇西地区现今垂直形变演化特征 |
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| 引用本文： | 张四新,张晓亮,程宏斌.滇西地区现今垂直形变演化特征[J].地震研究,2005,28(3):268-273. |
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| 作者姓名： | 张四新 张晓亮 程宏斌 |
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| 作者单位： | 中国地震局第二监测中心,西安,710054;中国地震局第二监测中心,西安,710054;中国地震局第二监测中心,西安,710054 |
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| 摘 要： | 通过对滇西地区1981～1992年、1992～2001两个时段的垂直形变场演化分析，认为：1981～1992年是滇西地区垂直差异运动最为剧烈的时期。就活动区域而言，主要在红河断裂以东，一个是滇西北裂陷区(其内部仍存在差异性，丽江-小金河断裂活动要强于程海断裂)；另一个地区就是滇中地块的的姚安、大姚、永仁以及会理地区。1992～2001年滇西地区垂直差异运动明显减弱，但红河断裂以西的隆起区活动有一定程度增强。最后，结合滇西地区的地震活动、动力背景进行了综合分析，对造成这两个时段形变差异的原因进行了探讨。
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| 关 键 词： | 垂直形变 地震活动 区域应力场 滇西地区 |
| 文章编号： | 1000-0666-(2005)03-0268-06 |
| 修稿时间： | 2004年5月31日 |
Current Features of Vertical Crust Deformation in West Yunnan |
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| ZHANG Si-xin,ZHANG Xiao-liang,CHENG Hong-bin.Current Features of Vertical Crust Deformation in West Yunnan[J].Journal of Seismological Research,2005,28(3):268-273. |
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| Authors: | ZHANG Si-xin ZHANG Xiao-liang CHENG Hong-bin |
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| Abstract: | We analyzed the evolution of vertical deformation field in two terms, 1981-1992 and 1992-2001, in West Yunnan, and the result shows that the vertical crustal difference movement was stronger in the first term. In this term there were two main active regions in the east of the Red River fault: the split-sink zone in Northwest Yunnan and the Yaoan, Dayao, Yongren and Huili areas in Middle-Yunnan block mass. In the second term, the vertical crustal movement east of the Red River fault became weaker apparently, but that in the uplift area west of the Red River fault increased to a certain extent. Combined with the seismicity and dynamic background in West Yunnan, the cause of the different deformation in two terms was discussed comprehensively. |
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| Keywords: | vertical deformation seismicity regional stress field West Yunnan |
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