刘晓霞,武艳强,邹镇宇

• 1:中国地震局地震预测研究所
• 2:中国地震局第一监测中心

摘要(Abstract)：

针对活动地块相对运动随时间的演化,该文利用多期GPS速度场资料,基于刚性运动模型分析了青藏高原东部多个活动地块的运动演化特征。首先为保证多期速度场的可比性,采用拟准检定(QUAD)优选算法将多期速度场转换到统一的稳定华南基准;然后基于刚性块体模型计算了多个活动地块相对华南地块的运动演化特征,结果显示柴达木、祁连、阿拉善和鄂尔多斯的运动速率明显小于巴颜喀拉、羌塘、川西北和滇中地块,且自羌塘向北东方向的巴颜喀拉再至南部的川西北和滇中地块表现为绕喜马拉雅东构造结的顺时针旋转运动。多期结果表明,除阿拉善和鄂尔多斯地块外,其余活动地块在汶川地震前后均出现显著的调整过程,说明汶川地震对周边活动地块整体运动的影响显著。

关键词(KeyWords)： GPS速度场;刚性模型;块体相对运动

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41704094)

作者(Author): 刘晓霞,武艳强,邹镇宇

DOI: 10.16251/j.cnki.1009-2307.2018.10.011

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