Writers : Parvaresh,mahboobeh;mahdizade shahri,hoseyn;saadat,saeed
Refference : 11th symposium of geological society of Iran-mashhad,ferdowsi university
Publishing Year : 1386

Abstract :

The area is situated between 58.30-58.45 to 35.45- 36.00 degrees in north Kashmar mountains. According to petrographic studies, extrusive Igneous rocks have a vast Composition from Dacite to rhyodacite, andesite to basltic andesite. In this paper, Tectonomagmatic diagrams and spider diagrams studies. Results show that these compositions are related on orogenic mechanism and continental margine calcoalkaline lavas. Increase of Zr component in this extrusive igneous rocks in strong probability resulted from mixing of parent magma with relatively thick crust materials . Extraordinary distribution of pyroclastic components, considerable presence of amphibole phonocrysts, ratio of La/Yb,Sc/Ni and Ba/Zr??? and extraordinary sufficiency of lithophyl elements with large ionic radiation , supported the results and reinforced the Idea of correlation between north Kashmar extrusive igneous rocks with active continental margines calcoalkaline lavas.

Subject List : , Volcanism