 | | Journal (article/letter/editorial) | | deposits of the Postmasburg manganese-field, South Africa E. von Plehwe-Leisen, D.D. Klemm Department...ganese m i n e r a l s are b r a u n i t e a n d bixbyite, a p a r t from s e c o n d a r y a l t e r a...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 |  | | 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...minerals, including braunite, partridgeite and bixbyite, with rare braunite II and Ca-poor, silica-depleted...Iron-poor partridgeite is distinguished from Fe-rich bixbyite and the occurrence of Ca-poor, silica-depleted...greenschist facies metamorphic conditions. In contrast, bixbyite is apparently a product of metasomatic remobilisation |  | | Journal (article/letter/editorial) | | localities it was noticed that cubic crystalsof bixbyite were, either wholly or in part, replacedby hausmannite...1108 0861-0128/88/192/1108-1152.50 Mn DEPOSITS, SOUTH AFRICA 1109 Geologic Framework .β’ β’:β’:β’:β’:β’:β’:β’:β’:β’:β’...Stellenbosch). 1110 j. E. DE VILLIERS proximatelynorth-south,and regionalshearingand (includingmetamorphic deposits)...Carboniferousperiod,and an unknown are manganosite, hausmannite, bixbyite,galaxite,jathicknessof Karoosedimentsand lava...general to be justified,exceptionsto this along a belt which extendsfor about 180 km from schemeare found |  | Burt, Donald M., Sheridan, Michael F., Bikun, James V., Christiansen, Eric H. (1982) Topaz rhyolites; distribution, origin, and significance for exploration. Economic Geology, 77 (8) 1818-1836 doi:10.2113/gsecongeo.77.8.1818 | Journal (article/letter/editorial) | | MnFe garnet, bixbyite, pseudobrookite, specularite,quartz, and other minerals.In the western United States...Idaho and Montana. They alsooccur in a singlelinear belt in Mexico. Their enrichmentin lithophile(fiuorophile)elements(Li...described from more than 20 localities in the western United States(Christiansen,1981). The topaz in...uraniumdepositsrelated to topaz rhyolite volcanismin the western United States(Burt et al., 1819 sidians)correlatewell...black Mn-Fe garnet,black cubes 1979). This feature,in conjunctionwith eruptiontemof bixbyite,(Mn, Fe)2Os |  | | Book | | Unconformity-type uranium deposits of the Northern Territory, Australia and Northern Saskatchewan, Canada Sandstone-hosted...Sandstone-hosted uranium deposits of the western USA Concluding statement References ORES FORMED BY MET AMORPHISM...valuable criticisms of individual chapters: Dr]. D. Ridge DrC A. Lee Mr A. M. Killick Dr P. H. Nixon Dr P...regions. Term broadly applied in the SW USA and South America. Carbonatization A type of hydrothermal...geology have characterized not only the premier Western publication concerned with ore deposits, but also |  | | 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...this was nicely shown for the case of oxidation of Mn(II) by bacteria [5]. Due to the rather low absorption...Centre for Minerals Research, University of Cape Town, South Africa (*megan.becker@uct.ac.z) 2 Dept. of Materials |  | Kogel, Jessica Elzea, Trivedi, Nikhil C., Barker, James M., Krukowski, Stanley T. - Eds. (2006) Industrial Minerals and Rocks (7th ed.) Society for Mining, Metallurgy, and Exploration, Inc., Littleton, CO. | Book (edition) | | University of Kansas and served as president of Western Mineral Associates. D reyer retired in 1984. Dr...Bloomington, Indiana Stratum Resources Sydney, New South Wales, Australia Sara M. Robinson Consulting Geologist...Brick Research Center Clemson University Anderson, South Carolina James M. Barker Dennis P. Bryan New...Alfred L. Bush Resource Development Inc. Wheat Ridge, Colorado Steven B. Carpenter Jackson Kelly PLLC...Georgia William E. Foxenberg Oak Ridge National Laboratory Oak Ridge, Tennessee Robert C. Freas U.S |
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Gloucester Farm, Western Belt, Gamagara Ridge, Northern Cape, South Africa