| 基于GPS速度场的云南地壳应力积累特征分析 |
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| 引用本文： | 唐红涛,贾鹏,刘芳.基于GPS速度场的云南地壳应力积累特征分析[J].大地测量与地球动力学,2018,38(2):125-128. |
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| 作者姓名： | 唐红涛 贾鹏 刘芳 |
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| 作者单位： | 中国地震局第二监测中心; |
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| 摘 要： | 利用2009~2015年的GPS水平运动速度场数据，解算云南地区的地壳应变场，在红河断裂与曲江断裂选取两个GPS剖面，计算并分析两个断裂的应变积累特征。结果显示：1）红河、曲江、小江等多个主要断裂应变场存在张、压交替的时空演化特征，近期曲江断裂南段表现为东西向拉张，红河断裂北段东西向拉张量值较大，约12.0×10-8/a，云南南部主要表现为NNE向的压性变化；2）从GPS剖面看，红河、曲江断裂在两个方向上均显示右旋走滑与拉张的变化特征，从量值上看，红河断裂北段运动速率较大,约8.90 mm/a。
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| 关 键 词： | GPS速度场 断裂 应变场 应力积累 |
Analysis of the Characteristics of Crustal Stress Accumulation in Yunnan Based on GPS Velocity Field |
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| TANG Hongtao,JIA Peng,LIU Fang.Analysis of the Characteristics of Crustal Stress Accumulation in Yunnan Based on GPS Velocity Field[J].Journal of Geodesy and Geodynamics,2018,38(2):125-128. |
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| Authors: | TANG Hongtao JIA Peng LIU Fang |
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| Abstract: | Based on 2009-2015 GPS velocity field data, the crustal strain field of Yunnan province is calculated and strain accumulation characteristics of two GPS stations selected at Honghe and Qujiang faults are analyzed. The results show that: (1) The Honghe, Qujiang, Xiaojiang main fracture strain fields contain tension and compression about time and space evolution characteristics. Recently, the south section of the Qujiang fault presents tension east-west. The northern section of the Honghe fault extension is larger, about 12.0×10-8/a, and the main performance of the southern Yunnan is pressure changes in NNE. (2) From the GPS profile, the Honghe, Qujiang faults show dextral strike slip and extensional variation in the two directions. However, from the value, the movement rate is larger in the north of the Honghe fault, where the strike slip rate is about 8.90 mm/a. |
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| Keywords: | GPS velocity fields fault strain field strain accumulation |
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