سال انتشار: ۱۳۸۷

محل انتشار: همایش بین المللی ژئولیت ایران

تعداد صفحات: ۵

نویسنده(ها):

Kamaladdin Bazargani-Guilani – Department of Geology, University of Tehran, Tehran 14155-6455, Iran
parisa yiusefey – Department of Geology, University of Tehran, Tehran 14155-6455, Iran

چکیده:

The zeolitic-bentonitic sequences of the Kuh-e-Arshe,50 km east Semnan ,north Central Iran have been
formed in a nearly closed chemical system, in a near surface condition in marine environments. The solution
being resident in the rocks. Clinoptilolite, mordenite, smectite, trace amounts of illite, quartz, opal-CT,
plagioclase, dolomite, calcite, together with rocks fragments were determined in this sequences. XRD data
have been showed that zeolite minerals, smectite, illite, quartz and dolomite are major components. SEM
images are indicated that zeolite and smectite, namely mordenite and clinoptilolite form mainly from
volcanic glasses (shards). The data obtained indicate that this zeolitic-bentonitic sequences formed by the
alteration of volcanic ash of rhyodacite/dacite composition.