Writers : Ahmadi, M. H.; Shamanian, Gh. H.
Refference : 2nd National Symposium of Iranian Society of Economic Geology
Publishing Year : 1390

Abstract :

The Motrabad gold-bearing vein system is located 30 Km southwest of Bajestan and the northern part of the Lut Block. The vein host rocks consist of intermediate to silicic volcanic and volcaniclastic rocks. The mineralization occurs as open space filling, taking place as irregular veins and hydrothermal breccias. Hydrothermal alteration is developed around the veins and tends to be more intense in the vicinity of the veins. In this study a graphical representation of the Ishikawa alteration index (AI) plotted against the chlorite-carbonate-pyrite index (CCPI), termed the alteration box plot, was used to determine the main alteration trends. The mineralogic, alteration and geochemical characteristics of the studied area and their comparison with epithermal ore deposits represent an epithermal system of the low-sulfidation type.

Subject List : Hydrothermal