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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.
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.
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 ...
Stillwater igneous complex around Mouat chromite mine Chromitite with bronzite phenocrysts from Stillwater Igneous Complex Sulfidic serpentintite, platinum-palladium ore from the Stillwater Mine. This is an altered pegmatitic dunite very richly infused with intercumulate Pt/Pd-rich chalcopyrite & pyrrhotite (golden metallic minerals).
It is usually found as the mineral chromite, from which ferrochrome is produced ... Country/Region Chromium ore production (tonnes) World: 44,000,000 1: South Africa:
One of the world's poorest nations sits on abundant deposits of iron, lead, lithium and other minerals, possibly worth trillions of dollars. The world needs chromite and lithium. Afghanistan has them.
Chromitite with bronzite phenocrysts from Stillwater Igneous Complex. Chromitite is an igneous cumulate rock composed mostly of the mineral chromite.It is found in layered intrusions such as the Bushveld Igneous Complex in South Africa, the Stillwater igneous complex in Montana and the Ring of Fire discovery in Ontario.
The beads range in size from the width of one hair to several hairs; the water content was just a miniscule fraction of that, said Hejiu Hui of Nanjing University, who took part in the study.