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Dolomite known as dolostone is a double carbonate of calcium and magnesium, CaCO3. MgCO3. After calcite, it is the second most important and abundant of the carbonate minerals. This work aims at processing, investigation and characterization of four different Libyan raw dolomite samples via simple chemical method. Based on a previous geological survey carried out by the industrial research centre (Tripoli), four dolomite samples selected from different locations of Libya namely; El-azizia, Souk El-khamees (sample P1), Nalout, Abu Rashada route, Gherian (sample P2), Sedi El-said, Abu Reshada route, El-gabl El-gharby (sample P3) and Abu Ghilan, north Kaf- Takoot (sample P4), were processed (crushed, ground and sieved), then investigated through their chemical composition using x-ray fluorescence (XRF) technique. Their mineralogical compositions were investigated using x-ray diffraction technique (XRD) and scanning electron microscope (SEM). All the measurement techniques in this work indicated that qualitatively the four investigated samples have a dolomitic nature. It was conformed that the percent of CaO in sample P1 (31.19%) is relatively higher than the standard dolomite (30.8%) which confirms the prediction of the presence of some content of calcite CaCO3 accompanied with dolomite sample P1. In spite of the limited variance in the chemical constitutions determined by x-ray fluorescence compared with classical wet method, the results confirm that the four investigated samples are mainly dolomite and that samples P1 and P2 are relatively purer than samples P3 and P4 which contain larger contents of Fe2O3, Al2O3 and SiO2.

The Characterization of Libyan Raw Dolomite Samples Using Chemical Techniques