 | | Journal (article/letter/editorial) | | chemistry of oxidefacies manganese ores of the Postmasburg manganese field, South Africa J. GUTZMERAND N. J...Park, 2006, South Africa Abstract The diagenetic to very low-grade metamorphic manganese ores of the...the Postmasburg manganese field provide a unique example of oxide-facies manganese ores in a Palaeoproterozoic...Transvaal Supergroup, manganese ore, Postmasburg, South Africa. Introduction TIlE manganese ores of the Postmasburg...the petrography of the manganese oxide ores of the Postmasburg manganese field has been studied in some |  | | Journal (article/letter/editorial) | | Karst-Hosted Fresh-Water Paleoproterozoic Manganese Deposits, Postmasburg, SouthAfrica JENSGUTZMERANDNICOLAS...SouthAfrica Abstract The Paleoproterozoie Postmasburg manganese fieldprovides an excellent example of a...Subgroup of theTransvaal Supergroup. Theferruginous manganese orebodies areirregularly shaped andconfined by...karst-hosted manganese deposits suggest thatthemanganese oresin the Postmasburg manganese fieldweredeposited...fieldweredeposited asresidual manganese wad.Theoresunderwent diagenetic compaction andlowergreenschist faciesmetamorphism |  | Fairey, Brenton J., Timmerman, Martin J., Sudo, Masafumi, Tsikos, Harilaos (2019) The Role of Hydrothermal Activity in the Formation of Karst-Hosted Manganese Deposits of the Postmasburg Mn Field, Northern Cape Province, South Africa. Minerals, 9 (7) 408 doi:10.3390/min9070408 | Journal (article/letter/editorial) | | Karst-Hosted Manganese Deposits of the Postmasburg Mn Field, Northern Cape Province, South Africa Brenton...Geology, Rhodes University, Grahamstown 6139, South Africa Correspondence: h.tsikos@ru.ac.za Current address:...Abstract: The Postmasburg Manganese Field (PMF), Northern Cape Province, South Africa, once represented...of the largest sources of manganese ore worldwide. Two belts of manganese ore deposits have been distinguished...Western Belt of ferruginous manganese ores and the Eastern Belt of siliceous manganese ores. Prevailing models |  | | Book | | Manganese Ores of Supergene Zone: Geochemistry of Formation by IGOR M. VARENTSOV Geological Institute...1930s-1990s 1.3. Methodical Aspects 1 6 15 2. MANGANESE ORES IN WEATHERING CRUSTS 20 2.1. Introduction...1.3. Stratigraphy 2.2.1.4. Structure 2.2.1.5. Manganese Oxyhydroxide Ores 2.2.1.5.1. Structure of the...2. Model Test Area: Moanda Deposit, Gabon, West Africa 2.2.2.1. Introduction 20 20 23 23 23 25 25 27...the Late Stages of Oxyhydroxide Ore Formation (Manganese Cap (Cuirass» 2.2.3.3.1. General characteristics |  | | Journal (article/letter/editorial) | | 101, pp. 385–405 Cretaceous Karstic Cave-Fill Manganese-Lead-Barium Deposits of Imini, Morocco J. GUTZMER†...Johannesburg, Auckland Park 2006, Johannesburg, South Africa M. RHALMI, Paleoproterozoic Mineralization...Johannesburg, Auckland Park 2006, Johannesburg, South Africa, and Department of Earth Sciences, Faculty of...Johannesburg, Auckland Park 2006, Johannesburg, South Africa, and Department of Geology, Presidency College...Abstract The economically important high-grade manganese ores of the Imini district, Morocco, are exceptional |  | | Book (edition) | | OF OF SOUTH AFRICA MINES GEOLOGICAL SURVEY MINERAL RESOURCES OF REPUBLIC OF THE SOUTH AFRICA...Second World War, and partly as a result of it, South Africa experienced vast industrial expansion. This...official ‘handbook on the mineral resources of South Africa, it has become necessary to revise, or rather...reason of the great diversity and magnitude of South African mineral deposits and local mining operations...Chamber of Mines of South Africa with Mr G. H. Grange as co-ordinator, and the South, African mining industry; |  | | Book | | talc vug in 1997, is 1.7 cm long (Marty, 2004 ). AFRICA widely in Litchfield County, where good crystals...which they called the Bentley Lake Road occurrence, south of Bancroft. Sharp, flattened rhombohedral ilmenite...Girardville, itself 40 km northwest of Lac Saint-Jean in south-central Quebec, very large and sharp ilmenite Cl)...the town of Amsteg, subordinate drainages running south to Val Caverdiras; ilmenite rose-bearing clefts...western flank of the Tschingelstock, a few kilometers south of the uppermost Maderanertal and near the Brunnital |  | | Book | | meteorites in which the grains are found. This new field of astronomy has grown to an extent that not all...their detailed study have opened a new and fruitful field of astrophysical research. ACKNOWLEDGMENTS I thank...comparable to the depletions observed for chromium, manganese, zinc, etc. Figure 4 Abundances of refractory...for other moderately volatile elements, such as manganese, sodium, potassium, sulfur, zinc, selenium, etc...now found for sulfur, scandium, strontium, and manganese, the only elements where the difference between |
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