基于多源遥感数据西藏山南地区活动断层解译

doi:10.6046/gtzyyg.2018.03.31

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摘要

利用多源遥感数据从多尺度重新对西藏山南地区活动断层进行遥感解译,并综合前人研究成果对其位置及活动性进行判定。首先,采用具有全天候和穿透性的Sentinel-1雷达图像和光谱信息丰富的Landsat ETM+影像作为主要数据源,并结合高空间分辨率的高分二号遥感影像,提取并分析不同尺度的地质构造信息; 其次,将DEM数据与ETM+遥感影像进行融合,获取三维可视化遥感影像,方便从不同角度、不同层次进行活动断层的构造地貌分析; 最后,综合雷达遥感与光学遥感各自的成像优势,利用图像预处理、图像增强处理与多源遥感图像融合等处理来降低活动断层遥感解译的多解性与可疑性,明晰了西藏山南研究区的活动断层遥感影像特征。根据活动断层遥感解译标志,在研究区共解译出主要活动断裂带4条,分别为: 雅鲁藏布江断裂带、札达—拉孜—邛多江断裂带、桑日—错那断裂带和达吉岭—昂仁—仁布断裂带。研究区的活动断层解译结果表明,综合应用多源遥感数据可以大大提高活动断层解译的准确率与可信度,并为研究区后续研究提供借鉴。

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	王阳明
	张景发
	刘智荣
	申旭辉

关键词 ：西藏山南地区, 多源遥感数据, 活动断层解译

Abstract：

The remote sensing interpretation of active faults in Shannan region of Tibet was carried out by using multi-source remote sensing data, which showed remarkable difference from previous work. In addition, previous researches made by other people were used to study the distribution and activity of active faults synthetically. First, taking Sentinel-1 Radar images which have properties of all-weather, side looking and penetrating and Landsat ETM+ images that have abundant spectral information as master data sources, combined with high resolution GF-2 remote sensing image, the authors extracted and analyzed geological structure information at different scales. What is more, it was convenient to analyze tectonic geomorphology of active faults from different angles and levels with the help of the fusion of DEM data and ETM+ remote sensing images so as to make 3D visualization remote sensing images. Finally, the authors used a wide range of methods such as image preprocessing, image enhancement and multi-source remote sensing image fusion to reduce the multiple solutions and dubiety of active fault remote sensing interpretation. With the help of Radar and optical remote sensing respective imaging advantages, the authors clearly displayed the characteristics of active fault remote sensing image of the study area. According to the remote sensing interpretation marks of active faults, a total of 4 active faults were interpreted in the study area: the Yarlung Zangbo River fault, the Zanda-Lhaze-Qiongduojiang fault, the Sangri-Cona fault and the Darjeeling-Ngamring-Rinbung fault. The results of active fault interpretation in the study area show that the application of multi-source remote sensing data could greatly improve the accuracy and credibility of the interpretation of active faults and provide a reference for later researches on the study area.

Key words： Shannan area in Tibet multi-source remote sensing data active fault interpretation

收稿日期: 2017-03-29 出版日期: 2018-09-10

TP79

基金资助:中国地震局地壳应力研究所中央级公益性科研院所基本科研业务专项项目“结合D-InSAR和建筑物结构模型的震害建筑物定量评估”(ZDJ2017-29)

作者简介: 王阳明(1990-),男,硕士研究生,主要从事遥感地质方面的研究。Email: wojiaowangyangming@163.com。

引用本文:

王阳明, 张景发, 刘智荣, 申旭辉. 基于多源遥感数据西藏山南地区活动断层解译[J]. 国土资源遥感, 2018, 30(3): 230-237.
Yangming WANG, Jingfa ZHANG, Zhirong LIU, Xuhui SHEN. Active faults interpretation of Shannan area in Tibet based on multi-source remote sensing data. Remote Sensing for Land & Resources, 2018, 30(3): 230-237.

链接本文:

https://www.gtzyyg.com/CN/10.6046/gtzyyg.2018.03.31 或 https://www.gtzyyg.com/CN/Y2018/V30/I3/230

Fig.1 研究区地质构造简图

Fig.2 GS光谱锐化融合

Fig.3 线状构造解译标志

Fig.4 雅鲁藏布江断裂带加查县附近断层三维遥感影像

Fig.5 札达—拉孜—邛多江断裂带三维遥感影像及断层左旋错断山脊和水系

Fig.6 桑日—错那断裂带三维遥感影像及被错动的湖泊和山脊

Fig.7 断层位置确定

Tab.1 研究区主要活动断层解译

Fig.8 研究区活动断层遥感解译(ETM+)

Fig.9 研究区内主要活动断层交切关系

Fig.10 拉分盆地受力分析(ETM+)

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