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首页> 外文期刊>International journal of image and data fusion >Integration of SPOT-5 and ASTER satellite data for structural tracing and hydrothermal alteration mineral mapping: implications for Cu-Au prospecting
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Integration of SPOT-5 and ASTER satellite data for structural tracing and hydrothermal alteration mineral mapping: implications for Cu-Au prospecting

机译：整合SPOT-5和ASTER卫星数据以进行结构追踪和热液蚀变矿物制图：对铜金勘探的意义

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摘要

The integration of information extracted from the Syste'm Pour I'Observation de la Terre (SPOT) and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data, comprehensive field and mineralogy studies demonstrates that phyllic alteration zone associated with northwestern (NW)-southeastern (SE) structural fractures is a high potential zone for Cu-Fe-Au vein-type mineralisation in the Bajestan region, the Lut block, east Iran. The fractal pattern was calculated for fractures map using the Box-Counting algorithm to the SPOT-5 data. Statistical parameters of fractures, such as density, intensity and fractures' intersection were also determined. Band composition, specialised band ratio and Spectral Angle Mapper (SAM) classification methods were implemented to the ASTER dataset for detecting hydrothermal alteration zones, such as propylitic, phyllic, argillic and gossan. Results indicate that the maximum value of the fractal dimension, intensity, density and the intersection of the fractures are concentrated in the NW and SE parts of SPOT image maps. In the other hand, phyllic alteration zone containing sericite, alunite, kaolinite and jarosite mineral assemblages was also identified in several zones of the NW and SE parts of the ASTER image maps. Integration of the results indicates the high potential zones for the occurrence of Cu-Fe-Au mineralisation in the Bajestan region.
机译：从Syste'm Pour I'Observation de la Terre（SPOT）和先进的星载热发射和反射辐射仪（ASTER）数据中提取的信息，全面的田野和矿物学研究表明，与西北（NW）相关的叶状蚀变带东南（SE）结构性裂缝是伊朗东部卢特区块巴吉斯坦地区Cu-Fe-Au脉型矿化的高潜力区。使用Box-Counting算法对SPOT-5数据计算裂缝图的分形图案。还确定了裂缝的统计参数，例如密度，强度和裂缝的交点。对ASTER数据集实施了谱带组成，专门的谱带比和谱角映射器（SAM）分类方法，以检测热液蚀变区，如丙炔酸，叶酸，精氨酸和棉质。结果表明，分形维数，强度，密度和裂缝交点的最大值集中在SPOT图像图的西北和东南部分。另一方面，在ASTER影像图的西北和东南部分的几个区域中，也发现了含有绢云母，亚矾石，高岭石和黄钾铁矾矿物组合的叶面蚀变带。结果的综合表明，在巴斯吉斯坦地区发生铜铁金金矿化的高潜力区。

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