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Remote Sensing and Gamma Ray Spectrometry data combination for mapping alteration zones: A Case study from Saint Catherine Ring Complex, Southern Sinai, Egypt. |
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PP: 153-170 |
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doi:10.18576/jrna/110205
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Author(s) |
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Remon N. Aziz,
Mohamed H. M. Yousef,
Adel F. Khalel,
S. M. M. Hanafy,
Motoyuki Sato,
El-Arabi H. Shendy,
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Abstract |
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| Saint Catherine Ring Complex area in the Southern part of Sinai Peninsula is a very promising mineralization district located in Egypt. The current study provides two steps of approach from multisource datasets, including multispectral satellite data from ASTER, along with ground radiometric data and field verification, to identify hydrothermal alteration zones indicative of mineralization. Starting with ASTER data discrimination for lithological and alteration mapping, several image processing techniques of Remote sensing data, including False Color Composite (FCC), Principal Component Analysis (PCA), Independent Component Analysis (ICA), Minimum Noise Fraction (MNF), and band ratio (BR), Spectral Angle Mapper (SAM), and Constrained Energy Minimization (CEM). Multiple alteration zones of argillaceous, phyllic, and propylitic types were recognized, spatially correlated with alteration minerals including chlorite, calcite, kaolinite, sericite, and iron oxides. The generated mineralization potential map identifies five prospective sites for mineralization. Following a ground Gamma ray spectrometry survey at Wadi Um Qeisum area from multiple promising areas, the radiometric data were analyzed to delineate areas with the greatest potential for potassic alteration abundance by integrating potassium distribution, K/eTh ratio, eU-index, and F-parameter maps. The correlation between remote sensing and radiometry methods shows a highly effective scenario for mapping the hydrothermal radioactive materials related alteration zones. |
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