Study of pyroxene veins on the Island of Hormuz, southern Iran: by using mineral chemistry

The Hormoz Formation in the south of Iran, in the northern part of the Persian Gulf. The island is one of salt domes that outcropped in Zagros. An oval shape and a surface area of about 45 Km2. Hormuz island is part of the Precambrian rocks, with the emergence of the salt domes exotic blocks of igneous and metamorphic rocks are also brought out to the surface. Pyroxenes crystals develop the veins of dark green to brown to cumulative streaks are formed in some Precambrian rhyolite rocks (554 Ma years). Analysis was conducted at the University of California, of pyroxene crystals. Mineral chemistry of these crystals are ferroaugite and thermometry of pyroxene mineral by using mole fraction of Wo-En-Fs is 500-600 °C, therefore the formation of pyroxene vines could be associated with magmatic Fumarole stage.