Behavior of Calcite in Dolomite Ores during Crushing

Anisotropic surface coupling while sliding on dolomite and calcite crystals

Carlos M. Pina,1 Rodolfo Miranda,2,3 and Enrico Gnecco2 1Department of Crystallography and Mineralogy, Complutense University of Madrid, E-28040 Madrid, Spain 2Instituto Madrileño de Estudios Avanzados, IMDEA Nanociencia, Campus Universitario de Cantoblanco, E-28049 Madrid, Spain 3Departamento de Fı́sica de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain (...

Oxygen Isotope Fractionation between Coexisting Calcite and Dolomite.

The oxygen isotopic composition of calcite from carbonate rocks of the lower unit of the Flagstaff formation (Paleocene) exposed along the western margin of the Wasatch Plateau, Utah, is about 7 per mil lower than that of coexisting dolomite, suggesting that isotopic equilibration of these two minerals can occur at relatively low temperatures. Unlike recent isotopic evidence presented by Degens...

Characterization of Experimental Shock Effects in Calcite and Dolomite by X-ray Diffraction

An investigation on thermal behavior of Shahreza dolomite ORE

Thermal behavior of the Shahreza dolomite ore is investigated in this paper. The hydration of the calcined dolomite was studied as a function of the calcination temperature. The DTA results exhibit three endothermic peaks at 800, 900 and 1050 °C, corresponding to decomposition of MgCO3 and CaCO3, both are present in dolomite and free calcite, respectively. The results also indicated that the de...

Direct nanoscale observations of the coupled dissolution of calcite and dolomite and the precipitation of gypsum

In-situ atomic force microscopy (AFM) experiments were performed to study the overall process of dissolution of common carbonate minerals (calcite and dolomite) and precipitation of gypsum in Na2SO4 and CaSO4 solutions with pH values ranging from 2 to 6 at room temperature (23 ± 1 °C). The dissolution of the carbonate minerals took place at the (104) cleavage surfaces in sulfate-rich solutions ...