Petrography and Geochemistry of the Basic Volcanic rocks of Kuh-e-Gharineh, north-east Ghorveh (west of Iran)

The volcano of Kuh-e-Gharineh is one of the volcanic areas of Ghorveh-Tekab in Sanandaj - Sirjan belt and located in Ghezelche Kand area. guartz xenocryst, plagioclase and granitoid xenolithe are seem in the composition of these rocks.Phenocrysts, xenocrysts, xenolithe are seem in a backgrand of microcrystalline with porphyric texture and microlytic matrix to glassy vesicular. On the basis of conducted petrographic researches, all rocks are consisted of basalt, olivine basalt and andisi basalt compounds. According to geochemical studies, the studied alkaline basalt rocks (ultrapotassic) are categorized as intraplate alkaline shoshonitic rocks. The negative and positive anomalies of normalized patterns of incompatible rare elements show the contamination with the crust and the phenomenon of assimilation. The analysis of the portion of the LILE)Litofil Ion Larg Elements(, HFSE)High Field Small Elements(, and REE)Rare Earth Elements(elements shows a sign of an enriched source similar to OIB)Ocean Island Basalt(oceanic basalt and also considers the role of upper /lower crusts to be more effective than that of the subcontinental lithosphere in magmas contamination.