 | | 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) | | Gloucester Mine Gamagara Hills Postmasburg Manganese and Iron-Ore Field South Africa BRUCE CAIRNCROSS Department...Johannesburg, South Africa brucec@uj.ac.za T he Postmasburg manganese and iron-ore field (Gutzmer and...relative to its northerly neighbor, the Kalahari manganese field. From a mineralogical standpoint, this is possibly...that are found in these two South African mining regions. However, Postmasburg does have some claim to mineralogical...mineralogical fame if the manganese-rich diaspore from the Lohathla, Glosam, and Gloucester mines is |  | | Journal (article/letter/editorial) | | University of Wollongong New South Wales 2522, Australia malcolms@uow.edu.au DIASPORE Muğla Province, Turkey...subject of this edition of Connoisseur’s Choice. Diaspore was named in 1801 by the Abbé Rene Just Haüy after...when heated before the blowpipe—hence the name diaspore after the Greek word diaspora meaning “to scatter...village of Kosoi Brod, approximately 27 kilometers south of Ekaterinburg, in Sverdlovsk Oblast, Russia (www...(www.mindat.org, accessed June 2019; Back 2018). Diaspore, α-AlO(OH), is the aluminum analogue of goethite; |  | 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 |  | | 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 |  | | Journal (article/letter/editorial) | | genesis of the manganese ore deposits of the Postmasburg manganese-field, South Africa E. von Plehwe-Leisen...n e s e field are situated in the N o r t h e r n C a p e P r o v i n c e / S o u t h Africa. T h e y...development of the Griqualand West Sequence in the Northern Cape Province has been under discussion for many...the lithostratigraphic classification of SACS (South African Committee for Stratigraphy) of 1980 is used...mineralization history and the genesis of the manganese ore deposits, as described in this paper, the |  | | Catalog/List | | MANGAN DIASPORE , dark brown cleavages in dark grey Bixbyite Postmasburg manganese field Northern Cape...Cape /South Africa 5x3 £25 38 FORSTERITE pale green pure mass with 3mm Phlogopite plates . Verbano-Cusio...solid piece - difficult to obtain- Kimberley South Africa £25 photo left 88 MARBLE . Dolomitic marble |  | | Report (issue) | | SURVEY OF SOUTH AFRICA COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA MINERALOGY OF SOUTH AFRICA:... COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA Scientific Editor R.D. Dixon Linguistic and...Council for Geoscience (Geological Survey of South Africa), 280 Pretoria Street, Silverton, Pretoria or........................... 69 5.1 Overview of South African Occurrences ..............................LAYEREDSUITE,BUSHVELDCOMPLEX.... 111 MINERALOGY OF SOUTH AFRICA: TYPE-MINERAL SPECIES AND TYPE-MINERAL NAMES |  | | 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 |  | | Catalog/List | | Lots” or type your desired Lot # into the “Search” field. Every lot is listed with full descriptions and...directions from a black sulfide matrix. The same Manganese that lends that pink coloration also produces...Skardu District, Baltistan, Gilgit-Baltistan (Northern Areas), Pakistan Nice Tourmaline comes from Stak...which references the locality as being German South-West Africa. The other label fails to indicate from which...Astor Valley, Astor District, Gilgit-Baltistan (Northern Areas), Pakistan The mountainsides of the Gilgit |  | | 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 | | Production and reserves. Canada. Soviet Union. Africa. United States. Other countries. Graphite . . .... .. ... . . Production. Europe. Asia. Africa. Mexico. Canada. United States. Barile and Witherite, Fluorite.... . . . . . . . . .. ... . United States. Northern Africa. Soviet Union . Oceanic Islands. 440 454 467...seen in New South Wales, because conditions appeared to be similar. He returned to New South Wales in 1851...our northern regions . . . . The colonization of the clay belts of northern Quebec and Northern Ontario |  | | 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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Lohatlha Mine, Western Belt, Gamagara Ridge, Northern Cape, South Africa