 | Oberthur, T., Weiser, T. W., Gast, L., Schoenberg, R., Davis, D. W. (2002) PLATINUM-GROUP MINERALS AND OTHER DETRITAL COMPONENTS IN THE KAROO-AGE SOMABULA GRAVELS, GWERU, ZIMBABWE. The Canadian Mineralogist, 40 (2) 435-456 doi:10.2113/gscanmin.40.2.435 | Journal (article/letter/editorial) | | DETRITAL COMPONENTS IN THE KAROO-AGE SOMABULA GRAVELS, GWERU, ZIMBABWE THOMAS OBERTHÜR§ Bundesanstalt für...the Somabula gravels, a paleoplacer of Upper Karoo (Triassic, ~200 Ma) age near Gweru, Zimbabwe. The...heavy minerals in the Somabula placers comprises staurolite, zircon, monazite, columbite–tantalite, cassiterite...revealed that most of the detrital grains of zircon, monazite and columbite–tantalite originate from Pan-African...Archean greenstone belts of the Zimbabwe craton. Keywords: zircon, monazite, tantalite, U–Pb dating, platinum-group |  | | Journal (article/letter/editorial) | | ancestry for the Somabula diamond-bearing alluvial deposit, Central Zimbabwe Andy Moore Somabula Explorations...Explorations (Pvt) Limited, Box CH399, Chisipite, Harare, Zimbabwe. e-mail: andy.moore@info.bw John Moore Geology...conglomerates, located to the southwest of Gweru in central Zimbabwe, have long presented an enigma in terms...Although conglomerate units occur throughout the Somabula Karoo succession, the diamonds and associated...20 km to the southwest of Gweru, in the Somabula district in central Zimbabwe (Figures 1 and 2). The diamonds |  | Oberthur, T., Melcher, F., Gast, L., Wohrl, C., Lodziak, J. (2004) DETRITAL PLATINUM-GROUP MINERALS IN RIVERS DRAINING THE EASTERN BUSHVELD COMPLEX, SOUTH AFRICA. The Canadian Mineralogist, 42 (2) 563-582 doi:10.2113/gscanmin.42.2.563 | Journal (article/letter/editorial) | | grains of ilmenite, rutile, zircon, baddeleyite, monazite, PGM and gold. Altogether, more than 6000 grains...from the Main Sulfide Zone of the Great Dyke in Zimbabwe (Oberthür et al. 1998, 2003, Oberthür 2002). In...alloys of Os–Ir–Ru–Rh–Pt found in the Somabula gravels of Zimbabwe (Oberthür et al. 2002a), we suggest...Platinum-group element mineralization of the Great Dyke, Zimbabwe. In The Geology, Geochemistry, Mineralogy and...platinum-group elements at Hartley platinum mine, Zimbabwe. 2. Supergene redistribution in the oxidized Main |  | Oberthur, T., Weiser, T. W., Melcher, F., Gast, L., Wohrl, C. (2013) DETRITAL PLATINUM-GROUP MINERALS IN RIVERS DRAINING THE GREAT DYKE, ZIMBABWE. The Canadian Mineralogist, 51 (2) 197-222 doi:10.3749/canmin.51.2.197 | Journal (article/letter/editorial) | | PLATINUM-GROUP MINERALS IN RIVERS DRAINING THE GREAT DYKE, ZIMBABWE Thomas OBERTHÜR§, Thorolf W. WEISER, Frank MELCHER...and PGE-oxides (unstable). Keywords: Great Dyke, Zimbabwe, alluvial sediments, Pt-Fe alloy, Os-Ir-Ru alloy...Bushveld Complex of South Africa, the Sudbury district in Canada, and later Norilsk in Russia came into...intrusions (Bushveld, South Africa; Great Dyke, Zimbabwe; Stillwater, USA) that host the overwhelming proportion...of knowledge on the Great Dyke of Zimbabwe. The Great Dyke of Zimbabwe constitutes the world’s second largest |  | | Journal (article/letter/editorial) | | detrital components in the Karoo-age Somabula gravels, Gweru, Zimbabwe—T. Oberthür, T.W. Weiser, L. Gast...itabirite-hosted Au–Pd–Pt mineralization (jacutinga), Itabira District, Minas Gerais, Brazil—R. Kwitko, A.R. Cabral,...Kupferschiefer of the Lubin-Sieroszowice mining district (SW Poland)—A. Bechtel, R. Gratzer, W. Püttmann...of mafic intrusions by SHRIMP U-Pb analysis of monazite in contact metamorphosed shale: An example from...implications for exploration in the Mt Magnet mining district, Western Australia—K.M. Scott Regolith geology |  | Melcher, Frank, Graupner, Torsten, Gäbler, Hans-Eike, Sitnikova, Maria, Henjes-Kunst, Friedhelm, Oberthür, Thomas, Gerdes, Axel, Dewaele, Stijn (2015) Tantalum–(niobium–tin) mineralisation in African pegmatites and rare metal granites: Constraints from Ta–Nb oxide mineralogy, geochemistry and U–Pb geochronology. Ore Geology Reviews, 64. 667-719 doi:10.1016/j.oregeorev.2013.09.003 | Journal (article/letter/editorial) | | NU 4.1.2. Congo Craton (DRC) 4.1.3. Zimbabwe Craton (Zimbabwe) 4.1.4. Kaapvaal Craton (South Africa)...Mineralogy 4.3.2. Kamativi Schist Belt (western Zimbabwe) 4.3.3. Orange River Pegmatite Belt (Namibia,...Birimian TE 5.1.4. Kaapvaal Craton D 5.1.3. Zimbabwe Craton 5.2.2. North-eastern DRC 5.3. Neoproterozoic...(Democratic Republic of the Congo), the Kamativi Belt (Zimbabwe) and the Jos Plateau (Nigeria). Mn-rich columbite-tantalite...late-orogenic (e.g., West African Craton, MA Zimbabwe Craton), post-orogenic (Kibara Belt, Damara Belt |  | | Report (issue) | | interest in the geo logy and mineral resources of Zimbabwe which followed the removal of United Nations sanctions...original Bulletin is the insertion of Table IIIA, Zimbabwe Mineral Production and Value, on page 114A. Due...from the southern part of the craton up into the Midlands area and is everywhere overlain by a thick pile...at the Cotopaxi and Dickens mines in Victoria District in 1894, but it was not until the early l 900's...LARGE GOLD MINES Mine Geology and mineralization District Cam and Motor Gatooma Globe & Phoenix Que |  | | Journal (article/letter/editorial) | | Marginal Zone of the Limpopo Belt in southern Zimbabwe represent a suite of dry magmas of tonalite-t...during late Archaean crustal growth in southern Zimbabwe invites comparison with modern convergent margins...rocks. The Limpopo Belt is located between the Zimbabwe and Kaapvaal Archaean Cratons of southern Africa...Northern Marginal Zone, which is situated in southern Zimbabwe (Fig. 1 ). The geology of the NMZ was first described...northern boundary of the NMZ, adjacent to the Zimbabwe Craton. Following Robertson and Du Toit (1981) |  | Legros, Hélène, Mercadier, Julien, Villeneuve, Johan, Romer, Rolf L., Deloule, Etienne, Van Lichtervelde, Marieke, Dewaele, Stijn, Lach, Philippe, Che, Xu-Dong, Wang, Ru-Cheng, Zhu, Ze-Ying, Gloaguen, Eric, Melleton, Jérémie (2019) U-Pb isotopic dating of columbite-tantalite minerals: Development of reference materials and in situ applications by ion microprobe. Chemical Geology, 512. 69-84 doi:10.1016/j.chemgeo.2019.03.001 | Journal (article/letter/editorial) | | used non-matrix matched minerals like zircon or monazite (i.e., Smith et al., 2004; Melleton et al., 2012)...No.239 pegmatite dike from the Dahe pegmatite district. This RI pegmatite is located in the eastern...publications based on U-Pb SIMS analyses of zircon, monazite, or uranium oxides NU since more than 25 years...unknown sample of a considered mineral (zircon, monazite, the 206 AC xenotime, titanite, uraninite...detrital components in the Karoo-age Somabula gravels, Gweru, Zimbabwe. Canadian Mineralogist 40, 435–456 |  | | Journal (article/letter/editorial) | | platinum-group elements at Hartley Platinum Mine, Zimbabwe Part 2: Supergene redistribution in the oxidized...Placers Æ Great Dyke Æ Hartley Platinum Mine Æ Zimbabwe Editorial handling: O. Thalhammer T. Oberthür...Espoo, Finland Introduction In the Great Dyke of Zimbabwe, economic concentrations of platinum-group elements...cuts Archean granites and greenstone belts of the Zimbabwe craton (Worst 1960). Stratigraphically, the layered...(>90%), magnetite, rutile, ilmenite, zircon, 350 monazite, rare pyrite, and pentlandite, as well as the |  | Stribrny, B., Wellmer, F. -W., Burgath, K. -P., Oberthür, T., Tarkian, M., Pfeiffer, T. (2000) Unconventional PGE occurrences and PGE mineralization in the Great Dyke: metallogenic and economic aspects. Mineralium Deposita, 35 (2) 260-280 doi:10.1007/s001260050019 | Journal (article/letter/editorial) | | initial production from mines in the Great Dyke of Zimbabwe has yielded 2.1 t Pt. The remaining 9.54 t are...Russia Stillwater, USA Sudbury, Canada Great Dyke, Zimbabwe Kupferschiefer, Poland Bregu i Bibes, Albania...production, for example those of the Great Dyke, Zimbabwe, ± potential alternatives in the form of unconventional...mineralizations PGE in layered intrusions: the Great Dyke, Zimbabwe Geological setting The ca. 2.58-Ga-old Great Dyke...cuts Archean granites and greenstone belts of the Zimbabwe craton (Worst 1960). In its present level of erosion |  | | Journal (article/letter/editorial) | | Unst, Shetland, '54, 399 Amisk-Athapapuskow Lake District, '20, (R) 282 Ammonite, new Name for Lias, D....Hemisphere, '39, 489 Jurassic Iron Ores, Cleveland District, '42, (R) 207 ; Chloride Waters of Great Britain...Perthshire, Unusual, W. T. Harry, '52, 41 Appleby District, Geology of, '15, (R) 431 ; '42,(R)78; '52, (R)...70 Assynt Culmination, E. B. Bailey, '35, 151 — District, Geological Excursion Guide, '38, (R) 140 — Mountains... Geological, Photographic, '13, (R) 424 Atlin District, British Columbia, '14, (R) 129 Atmospheric Erosion |  | | Report (issue) | | platinum-bearing gravels, chiefly in the Urals and the Chooo district of Colombia ; but in recent years Tasmanian osmiridium...from nickel-copper matte produced in the Sudbury district of Onta,r io. It was not until 1919 that any a...be found in payable quantities. In the Gwelo district,* platinum has been found in the '' Great Dyke...o ughout the territory. As occu1Ting i11 that district, about 6 miles north-east of Indiva siding, the...proved to occur in the diamondbearing gravels of Somabula Forest, near Willoughby's siding, abo11t 12 miles |  | | Report (issue) | | Trail in Gilgit-Baltistan DUDLEY BLAUWET 58. Zimbabwe Blue Topaz: St. Anne's Mine JAN KANIS 60. Brazil:...Kleine Spitzkoppe, Namibia; Mokrusha Mursinka District, Ural Mountains, Russia; Paprok, Laghman Province...(Simmons et al., 1987). Other pegmatites in this district contain abundant primary fluorite but no topaz...Kleine Spitzkoppe NYF-pegmatites in the Swakopmund District of Namibia have been known to produce nearly perfect:...with a large central cavity Murzinka (Alabashka) district, central U ral Mountains, Russia Gunther Neumeier |  | | Report (issue) | | deposits of rich •d iamantiferous grav.els in th,e district around Akwatia, which is 5 miles S.E. of· Kade...Foting·aia., 6½ miles N.N.W. of Jajma in the Kono district, a11d there was a find near Kennema in 1931. The...the Kambui hills nea.r Kennema and Lago, Kennema district. Small frag·ments of ruby and sma,11 zircon crystals...quantities. Alluvia.I diamond was discovered in the Somabula fore.st west of Gwelo in 1903. The stones occur...S. Rhodesia for the year 1915 (1916), pp. 2-5. Somabula diamond fields of Rhodesia, by F. P. Mennell; |  | | Book | | ........................ 7.2 Evolution of the Zimbabwe Craton..........................................swarms are outlined in several terrains, including Zimbabwe Craton (Fig. 3.1), southern India (Fig. 3.2) and...Sebakwian swarms in the Selukwe and Mashaba areas of Zimbabwe (Stowe 1973) (Fig. 3.1), pre-3.4 Ga old Sargur...xenolith distribution patterns in the Mashaba area, Zimbabwe Craton: T tonalite, D granodiorite, A adamellite...reported from the Selukwe-Gwenoro Dam area, southern Zimbabwe (Stowe 1973; Taylor et al. 1991), where both across-strike |  | | Journal (issue) | | Natural-Color Blue Diamonds Black Diamonds from Zimbabwe Characterization of Yogo Sapphires Synthetic Diamonds...range. 132 pg. 134 Black Diamonds from Marange (Zimbabwe): A Result of Natural Irradiation and Graphite...Breeding C.M. (2011) Hydrogen-rich diamonds from Zimbabwe with natural radiation features. G&G, Vol. 47... FEATURE ARTICLES BLACK DIAMONDS FROM MARANGE (ZIMBABWE): A RESULT OF NATURAL IRRADIATION AND GRAPHITE...from the Marange alluvial deposits in eastern Zimbabwe. Visual observations show that the dark appearance |  | | Journal (issue) | | I loc.) Molteno Beds (3 loc.) Associated with Somabula Beds Stormberg Series Stormberg Series Rhaetic...Southern Rhodesia the Forest Sandstone in the Somabula area contains a Thinnfeldia flora including Rhexoxylon...SpecialSurveys: Final work was carried out on the pyrochlore-monazite deposits at Mrima in preparation for the taking...normal in Uganda. About three-quarters of Kigezi District is now mapped and it is hoped that the basic mapping...unsuccessful. Su1nbu-NkomhedziCoalfield,Chikwawa District: The exploratory drilling programme in the Sumbu-Nkombedzi |  | | Journal (article/letter/editorial) | | Minnesotaite Mirabilite Molybdenite Molybdite Monazite Monetite Montmorillonite Montroseite Montroydite...In places, these minerals such as cassiterite, monazite or gold are concentrated in beds of varying thickness...Chromium deposits of this type in South Africa and Zimbabwe contribute to more than 90% to the world supply...subtypes (Bushveld, South Africa, Great Dyke, Zimbabwe, Muskox, Canada, Dore Lake, Australia, Campo Formoso...South Africa (Fe, Cr, and PGE) and the Great Dyke, Zimbabwe (Cr, PGE/PGM) in idealized cross sections and | | | Journal (article/letter/editorial) | | Minnesotaite Mirabilite Molybdenite Molybdite Monazite Monetite Montmorillonite Montroseite Montroydite...In places, these minerals such as cassiterite, monazite or gold are concentrated in beds of varying thickness...Chromium deposits of this type in South Africa and Zimbabwe contribute to more than 90% to the world supply...subtypes (Bushveld, South Africa, Great Dyke, Zimbabwe, Muskox, Canada, Dore Lake, Australia, Campo Formoso...South Africa (Fe, Cr, and PGE) and the Great Dyke, Zimbabwe (Cr, PGE/PGM) in idealized cross sections and |  | | Book | | Russia (Ural mountains), Zambia (Kafubu) and Zimbabwe (Sandawana)). Their study demonstrates how these...(sulfides of Ag, Pb, Cu, and Zn) in the Charcas mining district, San Luis Potosi. The area is characterized by...(Figure 2). Colombia, Brazil, Zambia, Russia, Zimbabwe, Madagascar, Pakistan, and Afghanistan (Figure...17. Tsa da Gliza. South Africa: 18. Gravelotte. Zimbabwe: 19. Sandawana, Masvingo, Filibusi. Mozambique:...[18], the Muzo mine in Colombia [1], the Mohmand district in Pakistan [1], and Eidswoll in Norway [13]. |  | | Journal (article/letter/editorial) | | eluvial in the Rondonia tinwith beveled mining district, Brazil.detrital topaz from eluvial placer deposits...Rondonia tin mining edges, Brazil. (c) Anhedral district, Brazil. Two processes, tectonic uplift and unroofing...gravel beds in the upper Karoo are operated at Somabula, Zimbabwe, not only for diamonds, but also for topaz...(pistazite) apatite, garnet (almandine-enriched), monazite, tourmaline, fayalite-enriched olivine, hypersthene |  | | Book | | Kingdom 193 United States of America 194 Zaire 203 Zimbabwe 203 Index 205 Preface When Peter Read asked...Brazil, Sri Lanka; Jos plateau, Nigeria; Volyn district, Ukraine, and numerous pegmatites throughout the...surprising, as he was familiar with the Saxon tin district which contains yellow topaz. An interesting description...up to 0.9 m long from the Ribaue-Alto Ligonia district of Mozambique that probably weigh over 100 kg... A 117 kg crystal was obtained from the Volyn district, Ukraine in 1966 (Milovsky and Kononov, 1985) |  | | Book (edition) | | Ceylon. Rhodesia, and S.W. Africa: Sri Lanka, Zimbabwe, and Namibia, respectively. However, although...2 USSR USSR 51 -38.8 Asbestos, 44 14.4 Zimbabwe Colombia Illinois 3.3 -20.2 14.8 7 3 18.4... Michigan. Domeykite Superior is from the district, Mohawk Mine, Michigan; Lake Ontario, Canada;...Tintic, Utah; Arizona; New Mexico; Coeur d'Alene district, Idaho. Hill, = 1 Anglesite gems are colorless...Cut Cut Color Ocean Kenya dark green 1.641 Zimbabwe yellow-green yellow Burma dark green green |  | | Journal (volume) | | described by Brøgger in fenitised rocks from the Fen district in Norway ( 1912 , p . 165 ) . In one of these...that seems to be comparable with one from the Fen district occurs in Chambe specimens B13 and B14 . This...with Brøgger's pale blue amphibole of the Fen district and with that described by Campbell Smith from...630-631. VON ECKERMANN, H. 1948 . The alkaline district of Alnö Island.” Sveriges Geol. Unders., No. 36...maintained that the lowest beds in the Kingston District should be regarded as a separate entity which |
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