M Maanijou; N Puyandeh; A.A Sepahi; S Dadfar
Abstract
The study area is located at 42 km NE of Qorveh city, in KordestanProvince and in the Metamorphic– Magmatic Sanandaj-Sirjan Zone. There are other important gold mines such as the Zarshouran and Aghdarreh mines in this zone. The most important alterations of the region are sericitic (phyllic), argillic, ...
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The study area is located at 42 km NE of Qorveh city, in KordestanProvince and in the Metamorphic– Magmatic Sanandaj-Sirjan Zone. There are other important gold mines such as the Zarshouran and Aghdarreh mines in this zone. The most important alterations of the region are sericitic (phyllic), argillic, silicification and propylitic respectively. Therefore, in this research, the phyllic and argillic alterations were the main purpose and by using different techniques of images processing of satellite images such as: False Color Composition, Band Ratio, Principal Component analysis, Crosta and finally by Spectral Angle Mapper methods iron oxides and development of alterations have been recognized. For accuracy between field evidences and results of software processing, X-Ray Diffraction analysis were used for controlling and recognizing the index minerals of each zone. Then, the comparison between standard and the study area curves were done to confirm the obtaining results. Finally, this method was effective in recognizing and mapping of the hydrothermal alterations.
F Aliani; S Dadfar; M Maanijou
Abstract
Prospecting of deposits by studying of alteration zones has agreat importance. Giventhattheidentificationof alteration zones of areas, which have iron potential has beenlessstudied usingremote sensingdata, thereforeto achievethe identificationofalterationsurroundingthe HajiAbadiron deposit in the northeast ...
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Prospecting of deposits by studying of alteration zones has agreat importance. Giventhattheidentificationof alteration zones of areas, which have iron potential has beenlessstudied usingremote sensingdata, thereforeto achievethe identificationofalterationsurroundingthe HajiAbadiron deposit in the northeast of Sonqor City,, in the Kermanshah Province processinganalysisofsatellite images such as False Color Composite (FCC), Band Ratio (B.R), Directed Principal Component Analysis (DPCA) and Spectral Angle Mapping (SAM) techniques on short wave infrared and visible near infrared bands (SWIR+VNIR) of ASTER (AdvancedSpaceborne Thermal Emission and Reflection Radiometer sensor) were used. Also by comparing USGS (United States Geological Survey) minerals standard reflection curve with studied region’s curves, it can be seen that the curve of thepropylitic alteration minerals have more agreement with chlorite and epidote, and the phyllic-argillic alteration have more agreement with illite and kaolinite, and iron-oxides have more agreement with goethite and hematite.The results accuracy wasapproved by fieldandmicroscopicstudies and represents thepatterns ofalteration aroundthedeposit.
