| | 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 | | | 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 | | Costin, Gelu, Fairey, Brenton, Tsikos, Harilaos, Gucsik, Arnold (2015) Tokyoite, As-Rich Tokyoite, and Noélbensonite: New Occurrences From the Postmasburg Manganese Field, Northern Cape Province, South Africa. The Canadian Mineralogist, 53 (6) 981-990 doi:10.3749/canmin.1500063 | Journal (article/letter/editorial) | OCCURRENCES FROM THE POSTMASBURG MANGANESE FIELD, NORTHERN CAPE PROVINCE, SOUTH AFRICA GELU COSTIN Department...Rhodes University, P.O. Box 94, Grahamstown 6140, South Africa Department of Earth Science, MS-126 Rice University...Rhodes University, P.O. Box 94, Grahamstown 6140, South Africa ARNOLD GUCSIK Department of Geology, University...Johannesburg, Johannesburg, South Africa ABSTRACT Samples of manganese-rich rock containing two compositional...core obtained from the Postmasburg area in the Northern Cape Province of South Africa. The samples consist | | 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) | Oncolitic Manganese Ore of the Paleoproterozoic Soutpansberg Group, Bronkhorstfontein, South Africa J. GUTZMER...524, Auckland Park 2006, South Africa Abstract The Bronkhorstfontein manganese deposit near Tolwe, Limpopo...Limpopo province, South Africa, constitutes an exceptionally well preserved and unmetamorphosed shallow-marine...shallow-marine manganese deposit of Late Paleoproterozoic age. It is the oldest known deposit that displays...shallow-marine pisolitic manganese deposits of Mesozoic and Cenozoic age. Manganese mineralization at Bronkhorstfontein | | | Journal (article/letter/editorial) | style of manganese mineralization in the Constantiaberg Massif, Cape Peninsula, South Africa A.M. Killick...Western Cape, 7945, South Africa e-mail: akillick@iafrica.com © 2020 Geological Society of South Africa...Africa. All rights reserved. Abstract Manganese oxyhydroxide mineralization is widespread in the Constantiaberg...arenites of the Peninsula Formation of the Cape Supergroup. Manganese is also found impregnating more porous...mountainous tract on the Cape Peninsula, South Africa, between Ou Kaapse Weg in the south and Constantia Nek | | | 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; | | | 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 | 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 | 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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