مطالعه کانی شناسی توده های گرانیتوئیدی جنوب دامغان با استفاده از دستگاه الکترون مایکروپروب

Magmatic belt of south of Damghan includes some post-Eocene plutons that mainly have intruded into the Eocene volcanic rocks . Based on results of electron microprobe analyses , amphibole minerals present in these bodies , according to Leake are ploted in the field of calcic amphiboles and show Actinolite , Actinolite-Hornblende and Magnesio hornblende composition . Pyroxenes , according to Morimoto are ploted in the field of calcic pyroxenes and show Augite and Diopside composition . Plagioclases show a wide spectrum composition of Oligoclase to Labradorite . Alkali Feldspars are mainly Orthoclase . Based on Fe/(Fe+Mg) ratio vs Al^IV , Biotites also show Annite to Phlogopite composition .