| 藏南宁金抗沙西麓断裂晚第四纪活动特征 |
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| 引用本文： | 陈正位,谢平,申旭辉,曹忠权,洪顺英,荆凤. 藏南宁金抗沙西麓断裂晚第四纪活动特征[J]. 地球物理学进展, 2006, 21(1): 118-126 |
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| 作者姓名： | 陈正位 谢平 申旭辉 曹忠权 洪顺英 荆凤 |
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| 作者单位： | 1. 中国地震局地震预测研究所,北京,100036
2. 西藏自治区地震局,拉萨,850000 |
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| 基金项目： | 地震科学联合基金课题(606010)资助 |
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| 摘 要： | 宁金抗沙西麓断裂位于亚东-谷露裂谷系南部.本文利用15 m分辨率的ETM 遥感影像和20 m分辨率的数字高程模型,结合野外地质考察,重点研究了该断裂的详细结构和晚第四纪以来的活动习性.依据与热隆盆地的关系,该断裂主要分为三段,热隆盆地以北为北段,热隆盆地边界断裂为中段,热隆盆地以南为南段.该断裂在强烈正断的同时兼具有左旋走滑运动,自中更新世以来,主要有三期活动,活动开始时间分别为384 ka1、08 ka和34 ka,累积水平活动速率分别为4.8 mm/a5、.5 mm/a和6.4 mm/a.断裂自中更新中期以来的垂直断错速率为1 mm/a.
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| 关 键 词： | 藏南 宁金抗沙 断裂 数字高程模型 遥感 |
| 文章编号： | 1004-2903（2006）01-0118-09 |
| 收稿时间： | 2005-10-10 |
| 修稿时间： | 2005-12-20 |
Activity of the Ningjinkangsha west piedmont fault in southern Tibet in later Quaternary |
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| CHEN Zheng-wei,XIE Ping,SHEN Xu-hui,CAO Zhong-quan,HONG Shun-ying,JING Feng. Activity of the Ningjinkangsha west piedmont fault in southern Tibet in later Quaternary[J]. Progress in Geophysics, 2006, 21(1): 118-126 |
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| Authors: | CHEN Zheng-wei XIE Ping SHEN Xu-hui CAO Zhong-quan HONG Shun-ying JING Feng |
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| Affiliation: | 1. Institute of Earthquake Science, CEA, Beijing 100036, China ;2. Earthquake Administration of Xizang Autonomous Region, Lhasa 850000, China |
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| Abstract: | The Ningjinkandsha fault(NJKSF) locates in the southern Yadong-Gulu rift(YGR).We obtained the structure detail and activity of the NJKSF in later Quaternary with ETM remote sensing image which resolution is 15m and digital elevation model(DEM) which resolution is 20m,along with field research.The NJKSF includes three sub segments according to the relationship between the fault and the Relong basin(RLB).The north segment locates in north to the RLB.The middle segment is the graben-bounding normal fault.The south segment locates south to the RLB.The NJKSF is a left lateral fault and a normal fault.Since mid-Pleistocene,three active phases were estimated for the NJKSF with the starting time,384 ka B.P.,108 ka B.P.,34 ka B.P.,and with the accumulating horizontal displacement rate,4.8 mm/a,5.5 mm/a,6.3 mm/a.The vertical displacement rate of the NJKSF is 1mm/a since mid-Pleistocene. |
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| Keywords: | Southern Tibet Ningjinkangsha Fault Digital Elevation Model Remote Sensing |
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