 | | 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...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...The erosional period in the North, East and the South of the Maremane Dome lasted until Asbestos Hills |  | | Journal (article/letter/editorial) | | of the Transvaal Supergroup, Griqualand West, South Africa HUBERT WIGGERING FB 9 Geologic, Universittit...University, P.O. Box 524, 2000 Johannesburg (South Africa) (Received February 12, 1989; accepted June...of the Transvaal Supergroup, Griqualand West, South Africa. Precambrian Res., 46: 241-258. A 4-m-thick...km northwest of Hotazel in Griqualand West, South Africa. The paleo-alteration profile is developed on...(Fig. 1A). It is al- TRANSVAAL SUPERGROUP, SOUTH AFRICA most invariably characterized by oxidation |  | | 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...variable amounts of hematite and minor amounts of illite, anatase and rutile. Some of the minerals present...(Eastern Belt), the Gamagara Ridge and in the Aucampsrust area (modified after De Villiers, 1960). karst |  | | Journal (article/letter/editorial) | | THF,Postmasburg manganese field,situated in the Northern replacement of the countryrockbymanganeseCapeProvince...In contrast Schneiderh6hn (1931)suggested in the south(Fig. 1). Miningof the manganese orescom- Borchert...'ostmasburg v ,6p Fe-deposit v V ¾ v v • v ¾ v Cape Town'•v v v •. v v v v F•c. 1. Regional...withlow-angle uneonformity byLate Beeshock in the northern and southern extremities of the domewheretheyconstitute...conglomerate finesupwardinto a sucFormationalongthe north-south-striking, westerlydipping The Doornfontein BlackRidgethrust |  | | 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...ancient glaciers, and the glaciation epoch of the northern countries - in Scotland, in Scandinavia, in Finland...northeastern part of Russia, in states of Canada and the Northern Ameriea - they are found here in rivers, where |  | | Book | | Unconformity-type uranium deposits of the Northern Territory, Australia and Northern Saskatchewan, Canada Sandstone-hosted...regions. Term broadly applied in the SW USA and South America. Carbonatization A type of hydrothermal...permission to proceed. Existing uranium mines in the Northern Territory will be allowed to continue but no new...the ensuing years. The Beisa uranium mine in South Africa provides a good example to illustrate this point...Deposit (1) (2) (3) (4) By-products Palabora, S. Africa Panguna, Papua New Guinea Bingham, USA El Abra |
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