| 基于GPS观测的北天山主要断裂现今构造运动特征研究 |
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| 引用本文： | 李杰,陈刚,魏文薪,帕尔哈提再努拉,王晓强,刘代芹,李桂荣,方伟,陈述江,孙小旭.基于GPS观测的北天山主要断裂现今构造运动特征研究[J].地震学报,2016,38(5):751-760. |
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| 作者姓名： | 李杰 陈刚 魏文薪 帕尔哈提再努拉 王晓强 刘代芹 李桂荣 方伟 陈述江 孙小旭 |
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| 作者单位： | 1.中国 乌鲁木齐 830011 新疆维吾尔自治区地震局 |
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| 基金项目： | 地震科技星火计划XH14054Y国家自然科学基金(41374030, 41274036)、 中国地震局地震预测研究所基本科研业务专项(2012IES0308)和地震科技星火计划(XH11030, XH14054Y, XH16042Y)共同资助国家自然科学基金41374030国家自然科学基金41274036地震科技星火计划XH16042Y地震科技星火计划XH11030中国地震局地震预测研究所基本科研业务专项2012IES0308 |
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| 摘 要： | 借助分布在北天山地区最新GPS点位的运动观测资料, 利用GAMIT/GLOBK数据处理软件获取了北天山地区现今地壳的运动位移场． 以该位移场为基础, 利用弹性半空间位错理论, 估算了研究区内博罗科努—阿其克库杜克断裂和准噶尔盆地南缘断裂两条具有代表性的主要断裂的现今活动速率． 结果表明: 博罗科努—阿其克库杜克右旋走滑断裂东、 西两段滑移速率的差异性不明显, 1944年3月10日乌苏南MS7.2强震发生后, 该断层现今表现为震后微蠕滑运动, 东、 西两段滑动速率均在1—2 mm/a之间； 准噶尔盆地南缘断裂现今滑动速率为(5.6±1.0) mm/a．
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| 关 键 词： | 北天山断裂 GPS观测 构造活动 位错模型 |
| 收稿时间： | 2015-11-22 |
Characteristics of present-day tectonics movement of typical faults in northern Tianshan mountain deduced from GPS observation |
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| Institution: | 1.Earthquake Administration of Xinjiang Uygur Autonomous Region, Vrümqi 830011, China2.Faculty of Information Engineering, China University of Geosciences, Wuhan 430074, China3.Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China |
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| Abstract: | Based on the latest multiple-epoch observation data of the GPS sites in northern Tianshan mountain, this paper obtained the present-day GPS sites velocity fields of the crustal movement in northern Tianshan mountain, using GAMIT/GLOBK processing software. Based on an elastic half-space dislocation model, slip rate of the two typical faults are constrained by GPS-derived crustal deformation displacement velocities of the northern Tianshan mountain. One fault is Boluokenu-Aqikekuduke (BoA for short) fault, and the other is southern margin fault of Junggar basin. The GPS results show that the slip rate difference between east and west segment of right-lateral strike-slip BoA fault is not obvious. The fault exhibted creeping slightly with micro-seismicity within 1—2 mm/a since MS7.2 south Wusu earthquake occurred on March 10, 1944. The present-day slip rate in southern margin fault of Junggar basin almost keeps (5.6±1.0) mm/a. |
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