Writers : Razavi, R. S.; Qasemi, H.; Sadeghyan, M.
Refference : 28th Symposium on Geosciences and the 14th Symposium on Geological Society of Iran
Publishing Year : 1389

Abstract :

In the North of Kalate sadat, upper Miocene olivine bearing basalts with porphyry, glomeroporphyry and microlithic structures have been outcropped. These rocks are results of eruption basaltic magmas into low depth sedimentary basins of upper Miocene. These lavas are entered to sedimentary basins by feeder dikes. Amygdaloidal structures have been obviously visible in the basal contact of basaltic magmas, these structures are resulted from boiling of water and making gas bobbles besides the basaltic magmas. These rocks show porphyry, glomeroporphiry and microlitic texture. Olivine and titanougite are phenocrysts. Olivine, titanougit and plagioclase found in the matrix of this rocks. These rocks have alkalin nature. The studies basalts are enriched from LREE and LILE (such as Sr, K, Th, Pb) and depletion from Nb and Nd. these geochemical characteristics indicate that they evolved from partial melting and little crustal contamination in these rocks. These basaltic rocks originated from a mantle.

Subject List : Basalt