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Chromite can also be presented in a thin section. The grains seen in thin sections are disseminated with crystals that are euhedral to subhedral. [12] Chromite contains Mg, ferrous iron [Fe(II)], Al and trace amounts of Ti. [5] Chromite can change into different minerals based on the amounts of each element in the mineral.
Bushveld Igneous Complex geologic map and mine locations. The Bushveld Igneous Complex (BIC) is the largest layered igneous intrusion [1] [2] within the Earth's crust. [3] It has been tilted and eroded forming the outcrops around what appears to be the edge of a great geological basin: the Transvaal Basin.
Chromitite and anorthosite layered igneous rocks in Critical Zone UG1 of the Bushveld Igneous Complex at the Mononono River outcrop, near Steelpoort, South Africa. A layered intrusion is a large sill-like body of igneous rock which exhibits vertical layering or differences in composition and texture.
At the bottom of the magma reservoir, a cumulate rock forms. Cumulate rocks are the typical product of precipitation of solid crystals from a fractionating magma chamber. These accumulations typically occur on the floor of the magma chamber, although they are possible on the roofs if anorthite plagioclase is able to float free of a denser mafic ...
Mines of the Merensky Reef. The Merensky Reef is a layer of igneous rock in the Bushveld Igneous Complex (BIC) in the North West, Limpopo, Gauteng and Mpumalanga provinces of South Africa which together with an underlying layer, the Upper Group 2 Reef (UG2), contains most of the world's known reserves of platinum group metals (PGMs) or platinum group elements (PGEs)—platinum, palladium ...
Addition and loss of water, carbon dioxide, and oxygen are among the compositional changes that must be considered. [5] For example, the partial pressure ( fugacity ) of water in silicate melts can be of prime importance, as in near- solidus crystallization of magmas of granite composition.
THMs have been detected at 38.1 ppb in NYC’s water supply, according to EWG data from 2013-19. The US limits THM in drinking water to 80 ppb, while the EWG recommends not exceeding 0.15 ppb .
Chromite, a FeCr 2 O 4 containing mineral It is used as a commercial source of chromium and its compounds. [ 1 ] It is also used as a catalyst in the synthesis of hydrogen (H 2 ) from the reaction between carbon monoxide and water vapor.