بررسي زمين شناسي و كاني شناسي توف هاي زئوليتي شده منطقه اردكان

Investigation of Mineralogy and Geology of Zeolitic Tuffs in Ardakan Area

The studied area is located in Cenozoic Magmatic Belt of Central Iran. The main constituents rocks are Eocene volcanic including: andesite, trachite, dacite and related pyroclastics. Field studies, mineralogy and result of analytical data (DTG, TG, XRD and XRF) have shown that the clinoptilolite is the main zeolite component of acid altered tuffs. Quartz, muscovite, biotite are minor minerals in the zeolitic tuffs. A closed hydrologic system is probably has formed this sedimentary type zeolite deposit, because the chemical composition of fresh tuffs are similar to zeolitic tuffs. On the base of geochemical data absorption behavior of zeolites in zeolitic tuffs are responsible to anomaly of Ba and Sr in the rocks. Volcanic,rocks are originated from calc-alkaline type magma.