Characterization of Dolomite, Pyrite and Chalcopyrite Mineral Rocks of Pakistan

Abstract

We studied the dolomite CaMg(CO3)2, pyrite FeS2and the chalcopyrite CuFeS2mineral rocks of Pakistan, using electronic probe micro analyzer (EPMA) of scanning electron microscope (SEM) with energy dispersive X-ray spectrum (EDS) analyzer. We observed in dolomite two phases perhaps due to crystallization in the matrix, due to calcite CaCO3 and quartz SiO2. In pyrite phase transition occurs due to pyrrhotite Fe1-xS (x = 0 to 0.2) and Carbon in the matrix of pyrite. In chalcopyrite two different kinds of phase transitions are observed, due to carbon, quartz SiO2 and pyrrhotite Fe1-xS (x = 0 to 0.2) in the matrix of chalcopyrite. These phase transitions in respective mineral rocks show disperse crystal mineralization due to pressure and temperature changes for more than thousands of years. Phases are observed with EDS and MLA.