سال انتشار: ۱۳۹۱

محل انتشار: اولین کنفرانس ملی فناوریهای معدنکاری ایران

تعداد صفحات: ۸

نویسنده(ها):

O Mahmoodi – M.Sc. student in Mining engineering-Exploration, Department of Mining engineering, University of Tehran, Tehran, Iran
H AsadiHarouni – Assistance professor, Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran
GH Norouzi – 3Associate professor, Department of Mining Engineering, University of Tehran, Tehran, Iran

چکیده:

The Sari Gunay epithermal gold deposit is located in 40 km northeast of Qorveh town, in south-east of the Kordestan province. The mineralization at this deposit is epithermal gold in character, accompanied by arsenic and antimonyminerals. The mineralization system is associated with the strongly altered Neogenedacite porphyry. The study area covers approximately 400 square kilometres, surrounding the Sari Gunay deposit. Different image processing techniques such as Principal Component Analysis, Crosta and Matched Filtering were applied on ETM+ satellite images to determine hydrothermal alteration associatedwith the epithermal gold mineralization. Using above mentioned techniques, hydroxyl and iron oxide minerals were highlighted and their distributionswere mapped. In order to define the areas affected by hydrothermal alteration,False Colour Composite images of these maps were produced. Finally in order to validate the resulting maps, a comparison was done among different processing methods.