Scholarly record

INTEGRATION AND ANALYSIS OF ASTER DATA, GEOPHYSICAL AND GEOLOGICAL DATA FOR EXPLORATION OF CU MINERALIZATION IN CHAHARGONBAD AREA, A GIS APPROACH

M. Ahadi, M. Farahani, A.HEZARKHANI

Abstract

The Chahargonbad area is located in southern part of the central Iranian volcano–sedimentary belt, in Kerman province. The intrusion of several intrusives bodies such as granodiorite, monzonite, diorite, granite and quartz diorite in the volcanic sedimentary sequence have given rise to an intense and vast alteration and copper mineralization in the southern part of this belt different image processing techniques such as color composites, image filtering, band ratioing and principal component analysis have been applied on ASTER data. The band ratios technique showed that band ratios of 7/9 and 3/2 enhance the altered and vegetation cover respectively. Band ratio of 2/1 also enhances the iron oxide bearing areas. Principal component analysis showed that the fifth PC has higher loadings of the bands related with alteration. This PC enhances the altered areas. The airborne geophysical data over the altered areas showed that the higher K, Th and U radiometry and lower total magnetic field is associated with the altered areas. For integration data, Fuzzy classification has been applied on airborne geophysical and remote sensing data.

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