سال انتشار: ۱۳۸۷

محل انتشار: همایش بین المللی ژئولیت ایران

تعداد صفحات: ۶

نویسنده(ها):

Kamaladdin Bazargani-Guilani – Department of Geology, University of Tehran, Tehran 14155-6455, Iran
Mohammad Sadegh Rabbani – Department of Chemistry, University of Tehran, Tehran 14155-6455, Iran
Ali Akbar Irajian – National Drilling Company, Ahwaz, Iran

چکیده:

Field, thin section, XRD, ICP-ES, ICP-MS and SEM studies of nalcime bearing tuffs of Abdolabad
region, 120 km east of Tehran, central Alborz, were performed to understand the formation conditions of the
analcime in tuffs of Karaj Formation Analcime was found with quartz in the lower layers of Karaj
Formation, while white opal-CT and smectite were in the upper part of the Formation. Diagenetic dolomite
and celestite with analcime bearing tuffs occur in the upper part of Karaj Formation. The absence of
pumpellyite in association with analcime, the relatively low thickness of the Karaj Formation in the study
region and absence of other metamorphic minerals with analcime are in favor of diagenetic character of
analcime in the east central Alborz.