Systematic regional exploration in the Gazik-Ahangaran zone using geological, mineral, geochemical, geophysical and satellite data
Geological Survey of Iran
By: Kambiz Rana, Fatemeh Haji Mohammadi, Mojgan Alavi, Mahdi Moradi
Technical executive: Ali Mohammadi-Joabadi, Simin Mahdizadeh-Tehrani
Considering the importance of mineral development as a goal of the Third Development Program of Iran, GSI defined 20 exploration zones according the world standards. Gazik-Ahangaran is one of these 20 zones. In this project with compilation and modeling of geological, geochemical, geophysical, satellite, and mineral data, several potential areas were identified that controlled during filed visit.
This zone that includes 1:100000 sheets of Gazik, Ahangaran and Sarchah in the east Iran is located between 59 30' to 60 30' E and 23 30' to 33 30'. With attention to the available ophiolite rocks in the east of Iran, and young volcanic rocks in the Sarchah, the area has an uneven topography with high summits.
All available mineral data of the region gathered. Most of indications and deposits are related to the magnesite formed due to alteration of ophiolite rocks. Other indications include iron and copper. In the modeling of the region, expected types of mineralization involve Cyprus-type massive sulfide copper, alpine type chromite, Limassol type nickel-cobalt and manganese. Modeling was done on the base of mineralization type by geochemical data of Ag, Au, Cu, Zn, Cr, As, Co, Ni, Mn and Ba; although, the geochemical data were not complete for the entire region. The applied geophysical data include airborne geomagnetic data. The geological mapping on the scale 1:100000 are now available only for Gazik and Ahangaran sheets.
Favorable mineralized zones include two zones at north of the Gazik village, and a zone in the Sarchah sheet near the Kalaf village.
At north of the Gazik village there are two zone that are located between 60 15' to 60 9' E and 33 07' to 33 09' N; 60 10' to 60 14' E and 33 02' to 33 06' N respectively. In these zones exposures of quartz microdiorite bodies as variously oriented dykes intruded in the upper Cretaceous flysch. The Oligocene bodies have no evidence of old workings.
In the Kalaf village, basalt and alkali basalt show mineral potentials. This zone is located between 59 51' to 59 56' E and 33 05' to 33 10' N.
Because of low data of the region it is not possible to assign a particular mineralization type to the identified favorable zones.