Abstract

Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and WorldView-3 (WV-3) satellite remote sensing data were used for mapping lithological units and hydrothermal alteration zones associated with Pb-Zn mineralization in the Kerman–Kashmar Tectonic Zone (KKTZ), Iran. The visible near infrared (VNIR), shortwave infrared (SWIR) and thermal infrared (TIR) bands of ASTER were used to map iron oxide/hydroxides, Al-OH minerals, Fe,Mg-OH minerals, quartz and carbonate minerals. The VNIR bands of WV-3 were used to discriminate Fe³⁺ and Fe²⁺ absorption intensities. Selective Principal Component analysis (SPCA), Spectral Angle Mapper (SAM), Linear Spectral Unmixing (LSU) and Automatic Lineament Extraction techniques were implemented. Lithological units were discriminated based on Al/Fe-OH, Fe²⁺/Fe³⁺ and Mg-Fe-OH/CO3 absorption properties. The spatial distribution of hematite, goethite, jarosite, gypsum, calcite, dolomite, kaolinite and muscovite were comprehensively detected. Some prospective zones were identified in the intersection of N-S, NW-SE and NE-SW trending fault systems, gossan, argillic/phyllic and dolomitic units.

摘要

先进的星载热发射和反射辐射计 (ASTER) 和 WorldView-3 (WV-3) 卫星遥感数据用于绘制与克尔曼-喀什马尔构造带 (KKTZ) 中的铅锌矿化相关的岩性单元和热液蚀变带，伊朗。ASTER 的可见近红外 (VNIR)、短波红外 (SWIR) 和热红外 (TIR) 波段用于绘制氧化铁/氢氧化物、Al-OH 矿物、Fe、Mg-OH 矿物、石英和碳酸盐矿物的地图。WV-3的VNIR波段用于区分Fe ³⁺和Fe ²⁺吸收强度。实施了选择性主成分分析 (SPCA)、光谱角映射器 (SAM)、线性光谱分离 (LSU) 和自动线性提取技术。基于Al/Fe-OH、Fe ²⁺ /Fe ³⁺和Mg-Fe-OH/CO3 吸收特性来区分岩性单元。全面检测赤铁矿、针铁矿、黄钾铁矿、石膏、方解石、白云石、高岭石、白云母的空间分布。在 NS、NW-SE 和 NE-SW 趋势断层系统、戈山、泥质/叶状和白云质单元的交汇处确定了一些预期区域。