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An ore deposit is an economically significant accumulation of minerals within a host rock. [9] This is distinct from a mineral resource in that it is a mineral deposit occurring in high enough concentration to be economically viable. [4] An ore deposit is one occurrence of a particular ore type. [10]
Oxide mineral exhibit at the Museum of Geology in South Dakota. The oxide mineral class includes those minerals in which the oxide anion (O 2−) is bonded to one or more metal alloys.
A mineral ore deposit is the volume of rock that can be mined at a profit. [7] Therefore, there are many variants that can define whether a mineral deposit is profitable or not, such as price, tonnage, or location.
The oxygen in the ore binds to carbon at high temperatures, as the chemical potential energy of the bonds in carbon dioxide (CO 2) is lower than that of the bonds in the ore. Sulfide ores such as those commonly used to obtain copper, zinc or lead, are roasted before smelting in order to convert the sulfides to oxides, which are more readily ...
High-grade gold ore from the Harvard Mine, Jamestown, California, a wide quartz-gold vein in California's Mother Lode. Specimen is 3.2 cm (1.3 in) wide. Various theories of ore genesis explain how the various types of mineral deposits form within Earth's crust. Ore-genesis theories vary depending on the mineral or commodity examined.
The ora serrata is the serrated junction between the choroid and the ciliary body.This junction marks the transition from the simple, non-photosensitive area of the ciliary body to the complex, multi-layered, photosensitive region of the retina.
Depending on the processes used in each instance, it is often referred to as ore dressing or ore milling. Beneficiation is any process that improves (benefits) the economic value of the ore by removing the gangue minerals , which results in a higher grade product ( ore concentrate ) and a waste stream ( tailings ).
Ore deposits of chromite form as early magmatic differentiates. It is commonly associated with olivine , magnetite , serpentine and corundum . [ 16 ] The vast Bushveld Igneous Complex of South Africa is a large layered mafic to ultramafic igneous body with some layers consisting of 90% chromite, forming the rare rock type chromitite (cf ...