Compositional Variations, Zoning Types and Petrogenetic Implications of Low-pressure Clinopyroxenes in the Neogene Alkaline Volcanic Rocks of Northeastern Turkey

Authors : FARUK AYDİN, ORHAN KARSLI M BURHAN SADIKLAR

Pages : 163-186

Doi:10.3906/sag-1205-26

View : 25 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Clinopyroxene phenocrysts and microphenocrysts in different series of the Neogene alkaline volcanic rocks from the eastern Pontides insert ignore into journalissuearticles values(NE Turkey); record various stages in the crystallization conditions and evolution history of the alkaline melt as well as its origin. Crystal chemical studies reveal that the clinopyroxenes in each rock series show strong textural and compositional similarities, which all reflect a common petrogenetic affinity. They have relatively high Mg-numbers insert ignore into journalissuearticles values(0.68-0.95);, variable Al2O3 insert ignore into journalissuearticles values(1.3-9.6 wt%);, low TiO2 insert ignore into journalissuearticles values(
Keywords : clinopyroxene, zoning, low pressure, alkaline volcanics, eastern Pontides, Northeastern Turkey