Extraction of Lineaments Using Landsat Image and Digital Elevation Model: A Case Study of Zagros Orogenic Belt, West Iran

IF 2.2 4区 地球科学 Q3 ENVIRONMENTAL SCIENCES
Shahriar Sadeghi, Ebrahim Sharifi Teshnizi, Rana Razavi Pash, Mohsen Golian
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Abstract

The extraction of structural lineaments was conducted on a portion of the Zagros orogenic belt in western Iran, using filters applied to Landsat satellite imagery (ETM) and a digital elevation model (DEM). The study area was divided into internal (Sanandaj-Sirjan) and external (Zagros) subzones by the Main Zagros Thrust. To extract lineaments, Edge Detector, Spectral Rationing, Principal Component Analysis (PCA) filters, and color combinations were applied to the ETM satellite imagery, while a directional filter (Sobel) was applied to the DEM for enhanced visual interpretation. The analysis identified 350 fault lineaments with a total length of 3689 km. The majority of these lineaments were shorter in length, with 188 lines measuring over 5 km, 110 lines between 5 and 10 km, 39 lines between 10 and 20 km, and 10 lines between 20 and 30 km. Only three lineaments exceeded 30 km in length. Statistical analysis of the lineaments, presented in Rose diagrams, revealed a predominance of NW and NE trends, with less frequent WNW, NNE, and E-W trends. The most dominant trend observed was NW. These findings suggest that the extracted lineaments are largely consistent with the faults in some inner subzones identified in previous studies of adjacent areas. However, differences in lineament orientations and densities, when considering subzones, were attributed to the likely reactivation of basement faults.

Abstract Image

利用大地遥感卫星图像和数字高程模型提取地形地貌:伊朗西部扎格罗斯造山带案例研究
利用应用于大地遥感卫星图像(ETM)和数字高程模型(DEM)的滤波器,对伊朗西部扎格罗斯造山带的一部分进行了构造线状提取。研究区域被扎格罗斯主隆起带划分为内部(萨南达吉-锡尔让)和外部(扎格罗斯)子带。为了提取断层线,对 ETM 卫星图像采用了边缘检测器、光谱配比、主成分分析(PCA)滤波器和颜色组合,同时对 DEM 采用了方向滤波器(Sobel),以增强视觉判读。分析确定了 350 条断层线,总长度为 3689 公里。这些断层线的长度大多较短,其中超过 5 千米的有 188 条,5 至 10 千米的有 110 条,10 至 20 千米的有 39 条,20 至 30 千米的有 10 条。只有三条线状物的长度超过 30 千米。罗斯图对这些线状体进行了统计分析,结果表明,这些线状体主要呈西北和东北走向,而呈西北、东北和东西走向的线状体较少。观察到的最主要趋势是西北。这些结果表明,提取的线状构造与之前在邻近地区研究中发现的一些内部子带的断层基本一致。然而,在考虑亚区时,线状走向和密度的差异被归因于基底断层可能重新活化。
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来源期刊
Journal of the Indian Society of Remote Sensing
Journal of the Indian Society of Remote Sensing ENVIRONMENTAL SCIENCES-REMOTE SENSING
CiteScore
4.80
自引率
8.00%
发文量
163
审稿时长
7 months
期刊介绍: The aims and scope of the Journal of the Indian Society of Remote Sensing are to help towards advancement, dissemination and application of the knowledge of Remote Sensing technology, which is deemed to include photo interpretation, photogrammetry, aerial photography, image processing, and other related technologies in the field of survey, planning and management of natural resources and other areas of application where the technology is considered to be appropriate, to promote interaction among all persons, bodies, institutions (private and/or state-owned) and industries interested in achieving advancement, dissemination and application of the technology, to encourage and undertake research in remote sensing and related technologies and to undertake and execute all acts which shall promote all or any of the aims and objectives of the Indian Society of Remote Sensing.
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