Physical Sciences and Mathematics Commons^™

Feather-Like Hornblende Aggregates In The Phyllites From The Southern Sanandaj-Sirjan Zone, Iran; Their Origin And Mode Of Formation, Hossein Fatehi, Hamid Ahmadipour, Nakashima Kuzuo, Hesamaddin Moeinzadeh

Turkish Journal of Earth Sciences

Several outcrops of spectacular feather-like hornblende aggregates occur in the phyllites of the Gol-e-Gohar complex (southeast of Iran) and form special Garbenschiefer rock types. The Gol-e-Gohar complex, as a part of the southern Sanandaj-Sirjan metamorphic zone, contains a succession of metabasites, phyllites, and slates intruded by dioritic intrusions. There are two types of hornblendes in the phyllites; the first one is concentrated around the fractures and the second one is randomly distributed in the rocks and forms radial feather-like hornblende aggregates. Petrographical and chemical characteristics of these two shapes of hornblendes are the same, except the latter is developed parallel …