Writers : Gharibnavaz, A.; Ebrahimi, Kh.; Mazaheri, A.; Yusefi, A.; Mahmoodei Gharaei, M.H.
Refference : The 15th Symposium of Crysallography and Mineralogy of Iran
Publishing Year : 1387

Abstract :

Ahooee” and “Rokh-sefid” deposits are created due to the infiltration of the Eosen micro granodiorit and microgranit dikes and alteration of pyroclastic rocks of them area.The area is covered by the meta-mikaschist, dacite, rhyolite, recrystalize rhyolite, trachiandesite, lithic tuff and acidic tuff rocks.The mineralogy of these mines in order of percentages are Quartz, Kaolinite, Dickite, Montmorillonite, Hematite and Alunite. Kaolinites of this area by having the average of 20.49% Al2O3, 71.64% SiO2, 1.39% Fe2O3 and 0.65% TiO2 and also other specifications as 1.61 to 1.86 gr/ cm3 bulk density, 13.75 to 33.63% water absorption, 2.2 to 44.8 Kgf/cm2 raw MOR,and 32.2 to 136.6 Kgf/cm2 fired MOR are used in industries like tile, ceramic, and porcelain. Large amounts of silice has been washed from internal acidic mass by thermal cycles, and along with high amounts of thermal solution silice, they have been deposited near the earth surface with the decrease of pressure, temperature and pH of solution.The REE analysis results of studied mines' samples show the Eu negative anomaly and high amounts of LREE/HREE.Therefore, a high amounts of weathering have occurred in Kaolin's source which are a kind of acidic volcanic rocks.

Subject List : Kaolin