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首页> 外文会议>Asian conference on remote sensing;ACRS >DETECTION OF HYDROTHERMAL ALTERATION ZONES AND LINEAMENTS ASSOCITED WITH OROGENIC GOLD MINERALIZATION USING ASTER REMOTE SENSING DATA IN SANANDAJ-SIRJAN ZONE, EAST IRAN
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DETECTION OF HYDROTHERMAL ALTERATION ZONES AND LINEAMENTS ASSOCITED WITH OROGENIC GOLD MINERALIZATION USING ASTER REMOTE SENSING DATA IN SANANDAJ-SIRJAN ZONE, EAST IRAN

机译：利用ASTER遥感数据，在东部萨南达杰-瑟尔詹带检测热液蚀变带和与成因金矿化有关的线

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The Sanandaj-Sirjan Zone (SSZ) is considered as an important region for exploration of orogenic gold mineralization in the eastern sector of Iran. Mountainous topography and relatively lack of accessible route are challenging for researchers and costly for mining companies for gold exploration in the SSZ. Gold mineralization mainly occurs as irregular to lenticular sulfide veins along shear zones in extremely altered and deformed mafic to intermediate metavolcanic and metasedimentary rocks. In this investigation, the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) satellite data were used for mapping indicator hydrothermal alteration minerals and geological structural features associated with orogenic gold mineralization in the Saqqez plot of the SSZ. Image transformation techniques such as specialized band ratioing and Principal Component Analysis were used to delineate lithological units and alteration minerals. Supervised classification, namely Spectral Angle Mapper (SAM) and Spectral Information Divergence (SID) supervised classification methods were used to detect subtle differences between indicator alteration minerals associated with gold mineralization in the study area. Directional filtering was implemented to trace structural features. Results demonstrate that the integration of image transformation techniques and supervised classification derived from ASTER remote sensing analysis with fieldwork and previous stream geochemical study has a great ability for targeting new prospects of gold mineralization in the Saqqez plot of the SSZ.
机译：Sanandaj-Sirjan区（SSZ）被认为是伊朗东部地区造山型金矿化勘探的重要地区。多山的地形和相对缺乏的通行路线对研究人员具有挑战性，并且对SSZ的金矿勘探对矿业公司而言是昂贵的。金矿化主要发生在沿剪切带的不规则状到透镜状的硫化物脉，发生在极其变质和变形的镁铁矿到中间的中火山岩和准沉积岩中。在这项调查中，先进的星载热发射和反射辐射计（ASTER）卫星数据被用于绘制SSZ萨克兹（Saqqez）地块中指示热液蚀变矿物和与造山金矿化有关的地质构造特征。图像变换技术（例如专门的谱带配比和主成分分析）用于描述岩性单元和蚀变矿物。监督分类，即光谱角映射器（SAM）和光谱信息发散（SID）监督分类方法，用于检测研究区域中与金矿化有关的指示蚀变矿物之间的细微差异。实施定向过滤以跟踪结构特征。结果表明，将图像转换技术和ASTER遥感分析得出的监督分类与野外工作和先前的流地球化学研究相结合，具有很强的针对SSZ Saqqez地带中金矿化新前景的能力。

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