| 滇西北地区近年来应力场的数值模拟研究 |
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| 引用本文： | 武永彩,李 昂,唐红涛.滇西北地区近年来应力场的数值模拟研究[J].大地测量与地球动力学,2018,38(12):1238-1240. |
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| 作者姓名： | 武永彩 李 昂 唐红涛 |
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| 摘 要： | 建立滇西北地区三维有限元地质模型，将2009~2016年GPS速度场数据作为数值模拟的位移边界条件，模拟获取该地区的构造应力场。结果表明，在楚雄至滇西北地区整体显示张性应力区；出现由“洱源鹤庆断裂-红河断裂-程海断裂”圈起的低值张性区，区域内部张性应力明显低于外部，这种张应力低值区尤其在区域四周断裂边界处，往往是地壳断裂活动的频发区；曲江断裂北端及元谋-绿汁江断裂南端出现张性应力集中区，是今后重点关注的断裂结点。
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| 关 键 词： | 滇西北 GPS速度场 应力场 数值模拟 |
The Numerical Simulation of Stress Field in Northwest Yunnan in Recent Years |
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| WU Yongcai,LI Ang,TANG Hongtao.The Numerical Simulation of Stress Field in Northwest Yunnan in Recent Years[J].Journal of Geodesy and Geodynamics,2018,38(12):1238-1240. |
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| Authors: | WU Yongcai LI Ang TANG Hongtao |
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| Abstract: | In this paper, a three-dimensional finite element model is established for northwest Yunnan province. The tectonic stress field of the area is simulated by using 2009~2016 GPS velocity field data as the displacement boundary condition of numerical simulation. The results show that: Chuxiong to the northwest of Yunnan province shows overall tensional stress; in the area circled by Eryuan-Heqing, Honghe, Chenghai faults, the internal tensile stress is significantly lower than that of the outside; the low value area, especially around the boundary fault, is often in areas of frequent crustal faulting; the north of Qujiang fault and the south of Lüzhijiang fault present a tensional stress concentration zone, which will be focused on in the future. |
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| Keywords: | northwest of Yunnan GPS velocity fields stress field numerical simulation |
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