用GPS资料分析青藏高原现今应变率场
发布时间:2019-05-11 13:18
【摘要】:基于中国大陆构造环境监测网络的GPS观测资料,获取青藏高原及周边地区地壳水平运动速度场以及应变率场。结果表明,青藏高原及周边地区10a尺度应变率场分布的整体特征与该地区长期地质构造背景和地震活动具有继承性,主应变、剪应变以及面膨胀率的分布特征与高原边缘和天山地区的地壳缩短、藏中南地壳的东西向伸展以及高原内部走滑断裂的构造活动一致。
[Abstract]:Based on the GPS observation data of the tectonic environmental monitoring network in mainland China, the velocity field and strain rate field of crustal horizontal movement in and around the Qinghai-Xizang Plateau are obtained. The results show that the overall characteristics of the 10-year-scale strain rate field distribution in the Qinghai-Tibet Plateau and its surrounding areas are inherited and the principal strain is the long-term geological tectonic setting and seismic activity in this area. The distribution characteristics of shear strain and surface expansion are consistent with the shortening of the crust at the edge of the plateau and the Tianshan area, the eastward extension of the south-central Tibet crust and the tectonic activity of the strike-slip faults within the plateau.
【作者单位】: 中国地震局地震研究所(地震大地测量重点实验室);
【基金】:国家国际科技合作专项(2015DFA21260) 国家自然科学基金(41404015,41304067,41474097) 中国地震局地震研究所所长基金(IS201326119)~~
【分类号】:P228.4;P315.7
本文编号:2474520
[Abstract]:Based on the GPS observation data of the tectonic environmental monitoring network in mainland China, the velocity field and strain rate field of crustal horizontal movement in and around the Qinghai-Xizang Plateau are obtained. The results show that the overall characteristics of the 10-year-scale strain rate field distribution in the Qinghai-Tibet Plateau and its surrounding areas are inherited and the principal strain is the long-term geological tectonic setting and seismic activity in this area. The distribution characteristics of shear strain and surface expansion are consistent with the shortening of the crust at the edge of the plateau and the Tianshan area, the eastward extension of the south-central Tibet crust and the tectonic activity of the strike-slip faults within the plateau.
【作者单位】: 中国地震局地震研究所(地震大地测量重点实验室);
【基金】:国家国际科技合作专项(2015DFA21260) 国家自然科学基金(41404015,41304067,41474097) 中国地震局地震研究所所长基金(IS201326119)~~
【分类号】:P228.4;P315.7
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