Preliminary mineral potential mapping in the Tasuj sheet of 1:100000, with application of GIS
By: Nazemeh Ashrafianfar
This report presents the result of a study in the Tasuj sheet of 1:100000 in which geological, geomorphological, geochemical, satellite and mineral data were compiled in GIS environment to identify mineral favorable zones.
The geology map of Tasuj is located between 45 to 45 30' E and 38 to 38 30' N and includes four 1:50000 sheets of Dizajdiz, Tasuj, Qara Bagh, and Sharafkhaneh. This area is situated in the Azarbaijan-e Gharbi Province of northwest of Iran. The general geology of the area can be classified in three zones that include Alamdar-Mishu, north Tasuj-Chupanlu and Qara Bagh.
The Alamdar–Mishu zone: this zone is located between to faults of Sharafkhaneh and Tasuj at south and north respectively. This zone is characterized by Kahar formation followed by Zagun, Lalun, Mila, Dorud and Ruteh formations.
North Tasuj-Chupanlu zone: It is occupied most area of the sheet and bounded between Tasuj and Mishu faults. It includes E-W trending Miocene evaporates and Plio-Pleistocene volcanic rocks.
Qara Bagh zone: at southwest of Tasuj, it is an island located in the Orumiyeh Lake and involves a complex of Precambrian metamorphic and magmatic rocks plus to Cretaceous intrusive bodies.
The general trend of structures in the area is east-west. Major faults include Tasuj, Sharafkhaneh, Chehregan, Varian, Sorkheh and Qater Uchan.
Following the application of the method of weight of evidence, the non-metallic mineral potential map of the region was prepared. Based on the economic geology report of the sheet, the Alamdar-Mishu zone has the potential of barite, building stone, gypsum and agglomerate. Gypsum also found in Tasuj-Chupanlu zone along with building stone. Halite probably exists in the Qara Bagh zone, where the building stone also has high potential. Barite occurrence has reported from hammer prospection report. This report also presents the evidence of copper and lead mineralization in the sheet.