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The Postmasburg Manganese Field's (PMF) history began with early geological mapping in 1930 and local prospecting in 1940s. [1] Systematic exploration in the 1950s led to discoveries at Gloria mine (1953), Nchwaning mine (1955), Mamatwan mine (1957), and Wessels mine (1958). Mining commenced with Gloria Mine in 1957, followed by Nchwaning in ...
Hotazel is a town in John Taolo Gaetsewe District Municipality in the Northern Cape province of South Africa.. The town serves the manganese mines, 147 km (91 mi) north of Postmasburg and 46 km (28.6 mi) north-west of Kuruman.
Mining and agriculture (cattle and game) support Kuruman's thriving economy. Minerals mined in Kuruman include manganese , iron ore , tiger's eye and crocidolite . The richest deposits of crocidolite in the world are found in the Kuruman district.
Jacobsite is a manganese iron oxide mineral. It is in the spinel group and forms a solid solution series with magnetite. The chemical formula is (Mn,Mg)Fe 2 O 4 or with oxidation states and substitutions: (Mn 2+,Fe 2+,Mg)(Fe 3+,Mn 3+) 2 O 4. [2] [4] Jacobsite, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South ...
The ore body was discovered in 1940 by Assmang, and led to the acquisition of a manganese outcrop. The properties on which the ore is situated were subsequently acquired by Assmang, and led to the 1975 commissioning of the Gloria mine (medium grade carbonated ore) as well as the later commissioning in 1972, 1981 and 2004 respectively of the N'Chwaning I, I and III shafts.
Todorokite is a complex hydrous manganese oxide mineral with generic chemical formula (Na,Ca,K,Ba,Sr) 1-x (Mn,Mg,Al) 6 O 12 ·3-4H 2 O. [1] It was named in 1934 for the type locality, the Todoroki mine, Hokkaido, Japan.
Olmiite is a rare calcium-manganese silicate that was named after an Italian mineralogist called Filippo Olmi. It was approved by the IMA in 2006, with its first description published in 2007. [ 1 ] Around 2001, a large amount of specimens believed to be poldervaartite was discovered at the N'Chwaning II mine, which is near the Wessels mine ...
Manganese is a chemical element with the symbol Mn and atomic number of 25. It is found as the free element in nature (often in combination with iron), and in many minerals. The free element is a metal with important industrial metal alloy uses.