 | | Journal (article/letter/editorial) | | manganese ores of the Postmasburg manganese field, South Africa J. GUTZMERAND N. J. BEUKES Department of Geology...University, P.O. Box 524, Auckland Park, 2006, South Africa Abstract The diagenetic to very low-grade metamorphic...Transvaal Supergroup, manganese ore, Postmasburg, South Africa. Introduction TIlE manganese ores of the Postmasburg...ferruginous ores of the Westem Belt and siliceous ores of the Eastern Belt (Fig. 1B). Ferruginous ores form...Lohatlha and Gloucester in the central part of the Western Belt (Fig. 1B). Siliceous ores occur locally in the |  | | Journal (article/letter/editorial) | | deposits of the Postmasburg manganese-field, South Africa E. von Plehwe-Leisen, D.D. Klemm Department...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 are a s s o c i a t e d to a geological...are distinguished: the E a s t e r n Belt, the W e s t e r n Belt a n d the M i x e d T y p e (Fig. 2)...of the E a s t e r n Belt. T h e m a n g a n e s e ores of the W e s t e r n Belt are younger. T h e M...occurring in distinct regional belts (Eastern and Western Belt) are small and irregular in size, shape and |  | | Journal (article/letter/editorial) | | THF,Postmasburg manganese field,situated in the Northern replacement of the countryrockbymanganeseCapeProvince...in twodistinctbeltsof deposits, the so-called Western Trnter et al., 1938; De Villiers, 1960; Boardman...In contrast Schneiderh6hn (1931)suggested in the south(Fig. 1). Miningof the manganese orescom- Borchert...ng AnalyticalTechniques the centralpartof the Gamagara ridge.Siliceous oresoccur in the Easternbelt alongthe...southernextremitiesof the Gamagara manganese oresamples, covering all macroscopically distinct ridge (Fig. 1; Hall |  | | Book | | 2. Model Test Area: Moanda Deposit, Gabon, West Africa 2.2.2.1. Introduction 20 20 23 23 23 25 25 27...Postmasburg Region, Griqualand West, Cape Province, South Africa 3.3.1. Geological Setting 3.3.2. Genesis...Manganese Ore Formation Manganese Ore Deposits of North Africa: Imini, Morocco 3.4.1. Geological Setting 3.4.2...of the Western Ukraine 3.5.2. Zone of Oxidation and Karst Ore Accumulation of the Enisei Ridge Mn Deposits...ancient glaciers, and the glaciation epoch of the northern countries - in Scotland, in Scandinavia, in Finland |  | | Journal (article/letter/editorial) | | 0861-0128/88/192/1108-1152.50 Mn DEPOSITS, SOUTH AFRICA 1109 Geologic Framework .• •:•:•:•:•:•:•:•:•:•...Stellenbosch). 1110 j. E. DE VILLIERS proximatelynorth-south,and regionalshearingand (includingmetamorphic deposits)...general to be justified,exceptionsto this along a belt which extendsfor about 180 km from schemeare found...Morocco,for instance,hausmanniteand janekke,70 km south-southwest of Postmasburg. It was cobsiteoccurin...transforms to bixbyiteat 600øC,pyrolusiteto bixbyite in Gamagara rocks where they are underlain by at 510øC, bixbyite |  | 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) | | Deposits of the Postmasburg Mn Field, Northern Cape Province, South Africa Brenton J. Fairey 1,† , Martin J...Geology, Rhodes University, Grahamstown 6139, South Africa Correspondence: h.tsikos@ru.ac.za Current address:...Postmasburg Manganese Field (PMF), Northern Cape Province, South Africa, once represented one of the largest...the PMF, namely the Western Belt of ferruginous manganese ores and the Eastern Belt of siliceous manganese...Postmasburg manganese field; hydrothermal; karst; South Africa Minerals 2019, 9, 408; doi:10.3390/min9070408 |  | | Report (volume) | | Mineral Foundation 63 Conyngham Street Glenside South Australia 5065 Australia (Orders: Tel. (08) 379-0444...Mineralogy and geochemistry of Archaean greenstone belt-hosted Mn formations and deposits of the Dharwar...Penganga Group of the Pranhita-Godavari valley, South India NICHOLSON, K., NAYAK, V. K. & NANDA, J. K...nodules with particular reference to the tropical South Pacific VON STACKELBERG, W. Growth history of manganese...Mn-oxide mineralization of Kato Nevrokopi, Macedonia, northern Greece: controls on formation of the Mn 4+ oxides |  | | Journal (article/letter/editorial) | | FrancisPhysical properties.--Braunitecrystallizesin the can belt of the Coast Ranges, California; Magnet tetragonal...Ranges from the Transverse Ranges on the south to the northern coast, the FranciscanFormation containsat...ganese oxideminerals, largelyhollandite, psilomelane, belt of sedimentaryrocks,mostlyearly Mesozoicin andcryptomelane...westernslopeof the Sierra -to them. Nevada. In the Sierran Belt, however, the rocks Severalsamplesof manganese...Grand County, Utah, eraIs have•been explored in a belt of rocks that small needle-shaped crystals having |  | | Report (issue) | | REPUBLIC MALAYSIA ) The- geology of the tin belt in Peninsular Thailand around Phuket, Phangnga and...Sciences OVERSEAS MEMOIR No.I The geology of the tin belt in Peninsular Thailand around Phuket, Phangnga and... S., and others. l 975·. The geology of the tin belt in Peninsular Thailand around Phuket, Phangnga and...geology of part of peninsu-lar Thailand. The tin belt around Phuket, Phangnga and Takua Pa is of particular...tin-mining region in Thailand and lies within the western belt of Mesozoic tin-bearing granites extending from |  | | Book | | comfort. Users of chromite, who must the USSR, South Africa, Albania, and wish that chromite deposits were...Republic of South Africa by the Department of Mines and the Geological Survey of South Africa; such profiles...Greece to Czechoslovakia, Mexico to Canada, South Africa to Jordan, and Australia to Sri Lanka. Industrial...from the initial letters of Asbestos Mines of South Africa, is an ash gray or brown material with vitreous...(Mann, 1983). nia; the USSR; the Italian Alps; New South Wales, Austral- ia; Cyprus). (2) Stratiform ultramafic |  | | Book | | Y PRESS Cambridge, New York, Melbourne, Madrid, Cape Town, Singapore, São Paulo, Delhi, Tokyo, Mexico...Introduction Peninsular Gneiss and Granitoids of Western Dharwar Western Dharwar Schist Belts Peninsular Gneiss...Dharwar Schist Belts Kimberlites and Lamproites Western and Eastern Dharwar Blocks: Similarity, Contrast...Introduction Southern (Bastar) Crustal Province (SCP) Northern (Bundelkhand) Crustal Province (NCP) Tectonic...Dalli–Rajhara–Rowghat–Bailadila Belt Gold in Kotri Belt Gold in Sonakhan Greenstone Belt 233 233 234 235 239 256 |  | | Report (issue) | | Arabinda Ghose 5. The Precambrian Sequences in the Western Himalaya 69 - 84 - O.N. Bhargava '" 6. Culmination...- 100 - B.P. Bhattacharyya and T.K. Ray Barman South India 8. Alkaline Complexes of Southern and Eastern...Comparative studies of the four Ultramafic Bodies of Northern Tamil Nadu - V. Ram Mohan, A. Kalaiselvan, B...- 1 94 1 3 . North Singhbhum Proterozoic Mobile Belt, Eastern India - A Review - Anupendu Gupta and Aniruddha...Tectonothermal Evolution of the EaStern Ghats Granulite Belt, India : A Metamorph ic Perspective - Somnath Dasgupta |  | | Report (volume) | | Proceedings of the Iowa Academy of Sciences. of Northern Iowa. Cedar Falls, Iowa. Iowa Geol. Survey Rept...Irish Naturalists' Journal. Committee. Belfast, Northern Ireland. Irish Naturalists' Journal Isis- Isis...Geography. Department of Geography, University of Western Ontario. London, Ontario, Canada. Ontario Water... and Oxford, England. South Carolina Devel. Board Bull. Columbia, S.C. South Carolina State Development...Bulletin. South Carolina Div. Geology Bull.- South Carolina Division of Geology Bulletin. South Carolina |  | | Report (issue) | | ___-._ Oregon._ ______________________________ South Dakota_____________.____________ Atlantic Coastal...Plateaus and Valley and Ridge provinces ____________________________ The Blue Ridge and Piedmont-_.___....._______ Montana._____________________________ Northern Rocky Mountains__________________ Mineral-resource...studies.________________ Western Belt Basin..___._______ Montana disturbed belt.________________ Yellowstone...48 Alaska _-_--_----_------------------------48 Northern Alaska. ____________-__---_West-central Alaska |  | | Report (issue) | | Britain and Northern Ireland (the latter as an agency service for the government of Northern Ireland),...History Museum Earth Galleries, Exhibition Road, South Kensington, London SW7 2DE e 071-589 4090 9 071-938...091-281 7088 Fax 091-281 9016 Geological Survey of Northern Ireland, 20 College Gardens, Belfast BT9 6BS -...Development (Northern Ireland) continues to support the activities of the Geological Survey of Northern Ireland...that is proving an attractive method to other Western European Geological Surveys . In a similar context |  | | Book (edition) | | ................................... 1977 IX.7. South China Sea ........................................................................... 2048 IX.9. South Philippines (Celebes Sea, Sulu Sea, Sandakan) ....abbreviations include: - Directions: N, S, E, W = North, South, East, West - Journals: J. = Journal, Bull. = Bulletin...6/8/20 ANDAMAN SEA SUMATRA KALIMANTAN NW BORNEO SOUTH CHINA SEA JAVA JAVA SEA, NATUNA MALAY BASIN...papers in Dutch and in German, focusing mainly on western Indonesia. Exceptions to this rule were the impressive |  | | Report (issue) | | _____________ _ Blue Ridge ________________________________ _ Valley and Ridge ___________________________..._________________________________ _ 27 28 30 30 Valley and Ridge province,.-_-----------Appalachian Plateaus provin...tensely disturbed local areas ___ --- - -- -- Blue Ridge and Piedmont provinces ____ --- 12 13 13 13 13...___ _ 96 Piedmont and Blue Ridge provinces ______ _ Valley and Ridge province ______________ _ Appalachian...Slate__________________________________ Valley and Ridge slate belt__________ West Virginia slate belt______________ |  | | Report (volume) | | A Note on the Iron Ore deposits of Twinng6, Northern Shan States. By J. Coggin Brown, M.Sc., F.G.S...Contributions to the Geology of the Province of Yiinnan in Western China. 5. Geology of parts of the Salween and Mekong... Lung-Ling-Shih* Tien Route. Limestone country south-east of Yung-Ch’ang Fu. Typical granite country...fragments were received by exchange from the South African Museum, Cape Town; these are: St. Marks (83-1 gms...Lakangaon Shupiyan (65*9 gms.) the Director, South African Museum, Cape Town, Bholghati (3) of of Minerals |  | | Report (issue) | | David A. Brew and A. L. Kimball ......... . . . Western Chichagof and Yakobi Islands Wilderness study area...W. Williams . . . . . . . . . . ...... . Pusch Ridge Wilderness, Arizona, by Margaret E. Hinkle and George... . ... .. ......... . Laurel-McGee and Wheeler Ridge Roadless Areas, Califor· nia, by Michael A. Cosca...Brown and Francis E . Federspiel . . . ....... . South Warner Wilderness, California, by Wendell A. Duf·.... . . . . . . . . ............. . Comanche-Big South, eota-Flat Top, and ever Summer wilderness study |  | | Journal (volume) | | (Hungary) (Croatia) (Hungary) (Slovakia) (Serbia) (South Africa) (Austria) (France) (Hungary) (Hungary) (Hungary).....................285 EG55 Mineral deposits of Africa..................................................produced and dispersed to the east and later to the south covering the neighbouring area with a few cm thick...Centre for Minerals Research, University of Cape Town, South Africa (*megan.becker@uct.ac.z) 2 Dept. of Materials...Metallurgical Engineering, University of Pretoria, South Africa 3 Julius Krutschnitt Mineral Research Centre |
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Gloucester mine, Gloucester Farm, Western Belt, Gamagara Ridge, Northern Cape, South Africa