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Application of Different Image Processing Techniques on Aster and ETM+ Images for Exploration of Hydrothermal Alteration Associated with Copper Mineralizations Mapping kehdolan Area (Eastern Azarbaijan Province-Iran)

引用

Open Journal of Geology 2014年第11期4卷 582-597页

作者： Golchin Hajibapir Mohammad Lotfi Afshar Zia Zarifi Nima Nezafati Department of Geology Islamic Azad University Science and Research Branch Tehran Iran Department of Geology Islamic Azad University North Tehran Branch Tehran Iran Mining Engineering Department Islamic Azad University Lahijan Branch Lahijan Iran

The kehdolan area is located at 20 kilometers to the?south-east of Dozdozan Town (Eastern Azarbaijan Province). According to structural geology, volconic rocks are situated in Alborz-Azarbyjan zone, and faults?are?observed?in?the?same direction to this system with SE-NW trend. The results show that kaolinite alteration trend with Argilic and propylitic veins?is the?same direction with SW-NE faults in this area. Therefore, these faults with these trends can be considered as the mineralization control for determination of the alterations. Different image processing techniques,?such as false color composite?(FCC), band ratios, color ratio composite?(CRC), principal component?analysis?(PCA), Crosta technique, supervised spectral angle mapping?(SAM), are used for?identification of the alteration zones associated with copper mineralization. In this project ASTER?data are process and spectral analysis to fit for recognizing intensity and kind of argillic, propylitic,?philic, and ETM+ data?which?are process and to fit for iron oxide and relation to metal mineralization of the area. For recognizing different alterations of the study area, some chemical and mineralogical analysis data from the samples showed that ASTER data and ETM+ data were?capable of hydrothermal alteration mapping with copper mineralization.?Copper mineralization in the region is in agreement with argillic alteration. SW-NE trending faults controlled the mineralization process.

关键词： kehdolan Area False Color Composite Band Ratios Color Ratio Composite Principal Component Analysis Crosta Technique Supervised Spectral Angle Mapping ASTER Data ETM+ Data Alteration

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