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Petroleum Migration and Accumulation
Published in Muhammad Abdul Quddus, Petroleum Science and Technology, 2021
Dolomite is a double carbonate mineral of calcium and magnesium. It is also called magnesium limestone [CaMg(CO3)2]. Dolomite is formed, by circulating water, rich in magnesium ions, by the exchange of calcium ions with magnesium ions in limestone rock. Limestone and dolomite are similar in color, shape and crystalline structure. Dolomite is a little bit harder than limestone. Its porosity is greater, and it is more stable than limestone under pressure and compaction. Therefore, the dolomite reservoir exhibits better porosity and permeability than limestone under varied conditions of overburden pressure.
Geology’s Role in the Major Issues Facing Society
Published in Aurèle Parriaux, Geology, 2018
Because of geologic or climatic reasons, a good part of the planet is characterized by highly acidic soils. In these areas, corrective measures are necessary to neutralize this natural defect and make the land more productive (Fig. 14.1). These corrective measures require geological resources: carbonate rocks. The first method is called liming: the addition of lime from calcinated carbonate rock reduces soil acidity. The second is amending the soil with crushed limestone (powdered calcite), but this neutralization method is slower. See Equation (9.6, § 9.1.2). For magnesium-poor soils, dolomite can be added because it provides this essential element to the soil. These operations are often limited because of large distances between quarries and the area to be treated but also because of the high cost and reduced financial capacity of the countries involved.
Geology’s Role in the Major Issues Facing Society
Published in Aurèle Parriaux, Geology, 2018
Because of geologic or climatic reasons, a good part of the planet is characterized by highly acidic soils. In these areas, corrective measures are necessary to neutralize this natural defect and make the land more productive (Fig. 14.1). These corrective measures require geological resources: carbonate rocks. The first method is called liming: the addition of lime from calcinated carbonate rock reduces soil acidity. The second is amending the soil with crushed limestone (powdered calcite), but this neutralization method is slower. See Equation (9.6, § 9.1.2). For magnesium-poor soils, dolomite can be added since it provides this essential element to the soil. These operations are often limited because of large distances between quarries and the area to be treated but also because of the high cost and reduced financial capacity of the countries involved.
Comparative separation analysis of direct and reverse flotation of dolomite fines
Published in Mineral Processing and Extractive Metallurgy Review, 2018
Sunil Kumar Tripathy, Shivakumar I. Angadi, Nanda Kishor Patra, D. S. Rao
Dolomite (CaCO3.MgCO3) theoretically contains a combination of CaCO3 (54.35%) and MgCO3 (45.65%) and represented by the calcite structure by substituting every alternate calcium layer with a magnesium layer. However, in nature, dolomite is available in a different combination of proportion in Ca and Mg. Dolomite has multiple usages in various industries such as the iron and steel industry, the glass and ceramic industry, fertilizers, and for the production of magnesium metal. The usage of the dolomite is based on its impurity content (SiO2, Fe(T), Al, Ti, P, S, Na, and K). Significant dolomite deposits are found in the USA, Ontario (Canada), Pamplona (Spain), Mexico, and in South American countries like Brazil, Argentina, and Chile (Deer 1998; Warren 2000; Dolomite, 2017; VanTuyl 1916). There are about 7533.1 million tonnes of the total dolomite deposits in India (all grades included, as on 2005), blast furnace/sintering grade constitutes about 30% of the total deposits, steel making category is about 20%, refractory 6%, 4% mixed (blast furnace and steel making grade), and glass 3% (YIBM, 2017; Krishnaswamy 1979).