Writers : Malakootian,Sara;Haghnazar,Shahrooz;Ghorbani,Mansour;Emami,Mohammad Hashem
Refference : Geosciences Scientific Quarterly Journal,No.:64,P.:166
Publishing Year : 1386

Abstract :

Petrological, geochemical and isotropic evidence of crustal contamination of the Quaternary basic rocks of Ghorveh-Takab axis is presented in this paper. These rocks are olivine basalt and basalt and they are plotted in the field of alkaline suites in geochemical diagrams.
Some evidence, such as the presence of gneissic xenoliths, quartz xenocrysts with reaction rims and biotite phenoblasts in the basic rocks of the study area and high amount of potassium and high values of K2O/P2O5 ratios, high concentration of LREE in comparison with HREE, high values of 86Sr/86Sr ratios and low values of 143Nd/144Nd ratios all indicate the crustal contamination of basic magma during its ascent.

Subject List : volcanic rocks