GSINET | Geological Survey of Iran , North - East Territory

Writers : Malek Zadeh Shafa Roodi, A.; Karim Pour, M. H.
Refference : 1st Symposium of Iranian Society of Economic Geology
Publishing Year : 1389

Abstract :

ASTER Satellite data processing for mineral mapping, alteration and mineralization, is fast and low cost method for detecting areas which has potential for mineral exploration. In the study, spectral angle mapper method has been used which able to separate index minerals of alteration zones, location and extending of them. In processing by SAM method, three altered area can be recognized in study area, surrounding turquoise mine and away that are: 1) altered area, covering 3 km2, in andesitic unit of northeaster mine with strong propylitic and hematitic� alterations, 2) altered area, covering 4 km2, in western mine and study area with argillic, alunitic and carbonate alterations and 3) altered area, covering approximately 2 km2, in andesitic unit of northeastern study area and south of magnetite mineralization associated with argillic, alunitic and carbonate alterations. In addition, silicified alteration has been enhanced surrounding of turquoise mine as sparse.
Based on development of alteration types including silicified, argillic, alunitic, propylitic and carbonate zones in turquoise mine and surrounding of it, oxidized zone minerals consist of
turquoise, hematite, goethite, limonite and malachite and anomaly of Cu, Mo, Pb, Zn, W, Co and Ni, porphyry copper type deposit can be occurred in the area. Confirmation of the case need to detailed field study.
Also in the study, alteration zones of Shotorsang and Kolahabouzar iron mines have been clearly enhanced and show importance of SAM method in exploration of deposit.

Subject List : Altration

Articles

Enhancing of alteration zones in northwestern Nyshabour by using Spectral Angle Mapper method in ASTER image processing