Physicochemical properties and tectonic setting of the basic intrusive rocks from south of the Germi (Ardabil): based on amphibole and plagioclase crystals chemistry
Subject Areas :Mohammad 1 , GholamReza Ahmadzadeh 2 , elham aghazadeh 3
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Keywords: Mineral chemistry Amphibole, Plagioclase Thermobarometry Oxygen fugacity, Gabbro, Germi.,
Abstract :
Eocene- Oligocene intrusive stock of basic bodies of south Germi are intruded into and cropped out in Eocene basaltic lavas. Studied gabroic intrusive rocks generally show granular texture with assemblages characterized by Cpx + Pl + Bi + Amph. Pyroxenes have augitic composition, plagioclase have labradoritic and amphiboles have pargasitic compositions. The studied amphiboles show (Na+K)A ≥ 0.5 with variable amount (0.57 - 0.99), Fe+3 content ranges from 0.00 to 1.17, also AlVI ranges from 0.00 to 0.68 and AlVI
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