Intrusion of tonalitic, granodioritic and quartz-dioritic igneous bodies of Oligocene age into Cretaceous andesite, andesi-basalt and carbonate rocks led to occurrence of widespread argillic alteration zone, along with skarnification in the northeast of Kharvana (East Azarbaidjan Province, NW Iran). Mineralogical studies indicate that argillic alteration zone includes kaolinite, quartz, alunite...

Sarchah Cu-Au mineralization area is located in South Khorasan Province, about 180 km southwest of Birjand city, and in Lut Block Tertiary magmatism assemblages. Geology of the area consists of Eocene to Holocene volcanic lavas with basalt – andesite composition and crystal tuff. Landsat and ASTER data detected alunite, jarosite, sericite, epidote, and kaolinite alteration minerals using"standa...

Torud-Chah Shirine magmatic arc is located in south of Semnan. This arc is composed of Cenozoic volcanic, pyroclastic and intrusive rocks. The Kuh-Zar in manning province of Bagho is outstanding with Cu-Au mineralization. Mining is restricted to hydrothermal alteration zones in the area. Alteration zones includes propylitic, phyllic, advanced argillic and silicic. The rare association of tourma...

The studied area is a part of Tarom Mountains and is located in 40 km north of Zanjan. The area is formed mainly by Tertiary volcano-sedimentary and plutonic rocks, which are mostly altered. Based upon geological setting, the hydrothermal alterations in the area are divided into two groups: (1) Regional alterations consisting of potassic, sericitic and propylitic types. (2) Structurally control...

Barandagh quadrangle is located in northeast of Zandjan, and is a part of polymetallic region of Tarem-Zandjan. Field evidence and microscopic studies show an intimate relationship between geochemical anomalies and alteration zones in this area. Based on the field observations and mineralogical studis, these zones, in light of extent, locality, and constituent mineral assemblage, differ fr...

Kaolin deposits in the Nivasht and Kabudkamar areas are located in ~25 km northwest of Saveh, Central province. Field observations along with petrographic examinations revealed that genetically these deposits are alteration products of igneous rocks such as andesi-basalt, trachy-andesite, and andesitic tuff of upper Eocene age. In this study, the physical, chemical, and mineralogical properties...

The Shotorkhosb kaolin deposit is located about 7 km southeast of Torbat-e-Heydariyeh, Khorasan Razavi Province, northeast Iran. This deposit is a part of the Khaf-Kashmar-Bardaskan metallogenic zone. Field observations and laboratory studies indicate that this deposit is a product of alteration of Eocene andesitic rocks.  In this study, different analytical techniques, such as XRD, SEM-EDS, FE...