Kamaladdin Bazargani-Gullanl - Department of Geology, University of Tehran, Tehran ۱۴۱۵۵-۶۴۵۵, Iran
Mohammad Sadegh Rabbani - Department of Chemistry, University of Tehran, Tehran ۱۴۱۵۵-۶۴۵۵, Iran
Maryam Faramarzi - Department of Chemistry, University of Tehran, Tehran ۱۴۱۵۵-۶۴۵۵, Iran

The zeolites occur mainly as amygdales at Kuh-e-Golestaneh and Badamcheh study regions in Central Iran. The volcanic rocks of both study regions have Eocene ages and of trachyandesite, andesite and andesitic basalt compositions. The types of zeolites at Kuh-e-Golestaneh are natrolite, tetranatrolite, fibrous mesolite, analcime, stilbite, levyne and offretite. Kaolinite and calcite are associated with the zeolites. Traces of chalcopyrite and malachite also observed at Kuh-e-Golestaneh. The zeolites of Badamcheh consist of natrolite, fibrous tetranatrolite, traces of analcime and mesolite. The presence of tetranatrolite, which is characteristic of hydrothermal minerals, indicate that the mineralization in both study regions have hydrothermal origins.