| 川西理塘断裂带的空间展布与第四纪左旋走滑活动的遥感影像标志 |
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| 引用本文： | 马丹,吴中海,李家存,李跃华,蒋瑶,刘艳辉,周春景.川西理塘断裂带的空间展布与第四纪左旋走滑活动的遥感影像标志[J].地质学报,2014,88(8):1417-1435. |
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| 作者姓名： | 马丹 吴中海 李家存 李跃华 蒋瑶 刘艳辉 周春景 |
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| 作者单位： | 首都师范大学资源环境与旅游学院，北京，100048； 中国地质科学院地质力学研究所，北京，100081； 城市环境过程与数字模拟国家重点实验室培育基地，北京，100048；4) 资源环境与地理信息系统北京市重点实验室，北京，100048；;中国地质科学院地质力学研究所，北京，100081；;首都师范大学资源环境与旅游学院，北京，100048； 城市环境过程与数字模拟国家重点实验室培育基地，北京，100048； 资源环境与地理信息系统北京市重点实验室，北京，100048；;中国地质科学院地质力学研究所，北京，100081； 中国地质大学（北京）地球科学与资源学院，北京，100083;中国地质科学院地质力学研究所，北京，100081； 中国地质大学（北京）地球科学与资源学院，北京，100083;中国地质科学院地质力学研究所，北京，100081； 中国地质大学（北京）地球科学与资源学院，北京，100083;中国地质科学院地质力学研究所，北京，100081； |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 遥感技术具有宏观性、直观性、时效性以及不受其他外部因素制约的特点,在活动断裂的研究中具有很大的优势。文章在系统总结活动断裂的遥感影像标志的基础上,综合利用Landsat ETM、ALOS、Google earth及ASTER GDEM(ASTER全球数字高程模型)等影像资料,结合前人研究成果及关键地段的野外实地考察,对展布于青藏高原东南缘之藏东-川西高原地区的理塘左旋走滑活动断裂带进行了详细分析与研究,结果显示该断裂带整体呈不连续的北西-南东向弧形展布,全长可达400km左右。根据该断裂的几何展布对其进行分段,自北西向南东可分五段,依次为:卡贡断裂、章德断裂、毛垭坝断裂、理塘断裂及康嘎-德巫断裂。综合分析不同断裂段的影像特征、错断地貌特征及现代地震活动情况表明,整条断裂带南段的毛垭坝-理塘-德巫断裂段的影像特征最明显、最连续,活动性明显较北段显著,这一特征可能暗示青藏高原内部物质向东挤出的速率有自西向东加快的趋势。
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| 关 键 词： | 遥感影像解译 青藏高原东南缘 理塘断裂带 走滑活动断裂 古地震崩塌 |
| 收稿时间： | 6/5/2012 12:00:00 AM |
| 修稿时间： | 2012/10/28 0:00:00 |
Ceometric Distribution and Quaternary Activity of Litang Active Fault Zone Based on Remote Sensing |
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| Ma Dan,wu zhong hai,Li Jiachun,Li Yuehu,Jiang Yao,Liu Yanhui and Zhou Chujin.Ceometric Distribution and Quaternary Activity of Litang Active Fault Zone Based on Remote Sensing[J].Acta Geologica Sinica,2014,88(8):1417-1435. |
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| Authors: | Ma Dan wu zhong hai Li Jiachun Li Yuehu Jiang Yao Liu Yanhui and Zhou Chujin |
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| Institution: | College of Resource Environment and Tourism, Capital Normal University,Insititute of Geomechanics, Chinese Academy of Geological Science,College of Resource Environment and Tourism, Capital Normal University,College of Earth Science and Resources, China University of Geosciences,College of Earth Science and Resources, China University of Geosciences,College of Earth Science and Resources, China University of Geosciences,Institude of Geomechanics, Chinese Academy of Geological Sciences |
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| Abstract: | Remote sensing technologyhas the dominance of macrocosm, intuitiveness, efficiency, along with not subject to external factors. So it has a great advantage in the study of active faults. This paper systematically summarizes the remote sensing interpretation signs of active faults, and using Landsat ETM, ALOS, ASTER GDEM and Google earth image data, combined with previous research results as well as geologic survey of key areas to study the Litang left lateral strike slip active fault zone, which located in eastern Tibet western Sichuan plateau, southeastern margin of the Tibetan Plateau. The research shows that the Litang fault zone is a discontinuous northwest southeast arc which about 400km. Based on the geometric features to divide the fault zone into five sections, from northwest to southeast are: the Kagong fault, the Zhangde fault, the Maoyaba fault, the Litang fault and the Kangga Dewu fault. Analysing the image signs, offset geological features and seismicity of the different fault sections, we found that the southern activities is stronger than the northern, especially the Maoyaba Litang Dewu fault section This result may suggest that the Tibetan Plateau eastward extrusion rate has a tendency to speed up from west to east. |
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| Keywords: | remote sensing interpreting the southeastern margin of the Tibetan Plateau Litang fault zone strike-slip fault earthquake triggered landslides |
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