Investigation of kalateh _ reshm magmatic

Category Petrology
Group GSI.IR
Location The 25 Symposium of Geosciences
Author Reza Zarei _ sahameih ,Hamed malek mohamadi & hamidreza mohebali
Holding Date 02 July 2007
 

Abstract :

 

            The area under the study (kalateh _ reshm) which is part of the trod . from geological point of view , this area is a portion of centeral iran zone.

            One the basis of analysis samples and microscopic studies, the rocks in the area under the study consist of basaltic andesite, andesite, trachy andesite, dacite and rhyolite which have outcropped in the region as volcanic (breccia and lava) .

            The microscopic observation of contamination magmata in the lava rocks such as the absorption phenomena poikiloblastic texture alternative classification in the plagioclase corrosion of pyroxenes and plagioclase and  existence of altered and non altered plagioclase together . The geochemical observations such as dispersion and abnormal elements ratio of sub traction sufficient and studding of spider diagrams show the pollution and contamination primary magmata to up surface .

 

            On the basis of existing diagrams , nature of magma tic rocks in  calc – alkaline and sometimes alkaline .

tags: QAZVIN