| 基于GPS的四川地区现时地壳形变分析 |
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| 引用本文： | 张荣斗,黄丁发,廖华,周乐韬,赵有兵.基于GPS的四川地区现时地壳形变分析[J].测绘科学,2008,33(6):30-32. |
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| 作者姓名： | 张荣斗 黄丁发 廖华 周乐韬 赵有兵 |
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| 作者单位： | 西南交通大学土木工程学院测量系,成都,610031;四川省地震局减灾救助研究所,成都,610014 |
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| 基金项目： | GPS基准站数据自动处理系统研制，四川省十五重大科学工程项目"基于GPS观测网络" |
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| 摘 要： | 对四川区域网多年数据进行处理,得到欧亚框架下的测站运动速度,采用刚性地块假设下的最小二乘拟合方法,得到川滇、川青、扬子地块的运动速度分别为(17.6±1.0)mm/a、(11.4±0.7)mm/a、(9.6±1.1)mm/a,地块运动方向逐渐由SE向SEE变化;作为川滇地块东边界的鲜水河断裂、安宁河-则木河断裂运动速度远大于龙门山断裂,显示了其较强的活动性。
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| 关 键 词： | GPS 断裂活动 地块运动 |
The analysis of present-day crustal deformation in Sichuan based on GPS |
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| Abstract: | GPS data of long duration from Sichuan regional network were processed by GAMIT/GLOBK,and a velocity field relative to the Eurasian reference frame was obtained.Using the GPS stations velocities involved,crustal block horizontal movement velocity was estimated by least-square fitting under the hypotheses of rigid mass.The fitting result shows that the velocities of Chuan-dian,Chuan-qing and Yang-zi block are(17.6±1.0)mm/a,(11.4±0.7)mm/a,(9.6±1.1)mm/a respectively and the direction of their movement changes from SE to SEE gradually.The velocities of Xianshuihe fault and Anninghe-zemuhe fault,which are eastern boundary of Chuandian block,are much larger than that of Longmenshan fault,indicating their strong ability of activity. |
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| Keywords: | GPS |
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