 | 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...The polymict spectrum of heavy minerals in the Somabula placers comprises staurolite, zircon, monazite,...derived from late Archean greenstone belts of the Zimbabwe craton. Keywords: zircon, monazite, tantalite...isotopes, paleoplacer, Karoo Formation, Somabula gravels, Gweru, Zimbabwe. SOMMAIRE Nous avons étudié des concentrés |  | | Journal (article/letter/editorial) | | mining for gold in the valleys of the J_ Cariboo district of British Columbia has led to a careful investigation...barriers of Glacial age. VII.—PLATINUM METALS IN THE SOMABULA DIAHONDIFEROTJS GBAVELSBr H. B. MAUFE. Southern...Geological Survey- Short Report No. 5, 1319. HE Somabula Diamondiferous Gravels which contain the diamond...occurrence of platinum in Southern Rhodesia, said: "The Somabula gravel for instance is a likely source, since...black goldbearing sands concentrated from the Somabula gravels apparently T Downloaded from https://www |  | | Journal (article/letter/editorial) | | The Somabula Forest Diamond Field Southern Rhodesia M. C. B The Somabula Forest diamond placers are...workings. The oldest mine of importance in the Somabula area is the Shamrock Gold Mine to the north of...for gold led to the discovery of diamonds on the Somabula Spruit in 1Ç)03 by H. R. Moir and his brother...other minerals associated with the diamonds at Somabula might be expected. PRODUCTION Value £27,843 3...331 2,991 2,230 3,083 1,917 GENERAL GEOLOGY The Somabula Forest and the surrounding country is underlain |  | | Report (issue) | | ind11strial application, althougl1 the natural alloy osmiridium is of considerable value for its iridium-content...from placer deposits, in which, excepting the osmiridium fields of Tasmania and Papua, platinum is found...Urals and the Chooo district of Colombia ; but in recent years Tasmanian osmiridium has become an important...of osmium is usually given as about 2,500°0. Osmiridium occurs native in two principal varieties, known...obtained ~s a by-product in the treatment of osmiridium a.nd other native alloys of the plat-inum metals |  | | Journal (article/letter/editorial) | | oduct. Mess. 482. Blei, gediegen, v. Clondike-District 619. Bleierze in Spanien 117. Borsäure in Toscana...Orthoklaszwillinge von a b n o r m e r Ausbildung 129. Osmiridium aus Brasilien 120. P. Palladium aus Brasilien...Analyse 623. Smithsonit v. Donetz-Becken 291. Somabula-Diamantfeld 615. Sorbierit, Mess. 507. Souesit...Verwachsung mit Tetraedrit 626.. Staurolith v. Somabula- Diamantfeld 615. Stephanit v. Yukon 619. Stilbit |  | | Report (edition) | | as in the alluvial gold workings of the Choco district, it was usually thrown away as worthless, although...been found in recent years in the Rustenbu1·g district of 8011th Africa. Next in economic importance...approximately as follows~ platinum, 60 to 90; osmiridium, 11p to 27; iridium, up to 7; 1·hodiu1n, up to...nickeliferous iro11. Exceptionally, the amount of osmiridium in native platinum reaches 37 per cent. or more...the most part, with the platinum; whereas the osmiridium appears to be present as such, in the state of |  | | Report (issue) | | ___________________________________ _ Sudbury district _______________________ ~ Discovery and present...lacers-------------------------------Tulameen district __________________ _ Other placers ______________________...ores ____________ _ Placers of the Witwatersrand district __ History and production _____________ _ General...---------------N oril'sk district ____________ -----_---- _____ _ Petsamo district ___________________________...Placers-------------------------------Goodnews Bay district _____________ _ ~ining and production _________ |  | | 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) | | 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 | | (Color Plate). 227 Map of Swaziland. 232 Map of Zimbabwe (Rhodesia). 234 Map of Mozambique. 237 Namibian...particles of gold, silver, uranium, chromite, osmiridium—indeed, a large and rich assortment of Nature's...these diamonds in the two mines in the Benoni district aroused very little interest in a country where...Gold and Diamond Mine and those in the Benoni district mines were more or less identical, forming part...shores of the archaean river delta in the Benoni district, while the smaller and lighter stones were carried |  | | Report (issue) | | Platinum-group element mineralization of the Great Dyke, Zimbabwe. In The Geology, Geochemistry, Mineralogy and...Company. The PGE mineralization in the Great Dyke (Zimbabwe), which is the world’s second largest reserve...Layered Complex (Sierra Leone) and the Great Dyke (Zimbabwe). The Papers, Third Group: Beneficiation and Metallurgy...platinum-group minerals in the Karoo-age Somabula gravels, Gweru, Zimbabwe. Canadian Mineralogist, 40, p. 435-456...Platinum-Group Element Mineralization of the Great Dyke, Zimbabwe T. Oberthür 483 Platinum-Group Element Mineralization |  | | 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...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...report is in • preparation. Nkana Coalfield,Karonga District: Mr. Bloomfield completed his detailed surface |  | | Book | | as silica gel. Iridosmine Os, Ir This is the osmiridium-rich member of the system Os-lr, in which the...dilute acid may be used as a cleaning agent. Osmiridium Ir, Os This is the cubic, iridium-rich phase...Australia at Kalgoorlie; in the Cripple Creek district, Teller Co., Colorado and in Calaveras Co., California...in Norway and with pyrrhotine in the Sud¬ bury district of Ontario; San Diego Co., California. Treatment...quartz veins. Localities. Poorman mine. Silver City district, Owyhee County, Idaho. Freieslebenite Ag5Pb3Sb5S12 |  | | Book (edition) | | found it in the native metal that occurred in his district. In parts of the world where gold was found in...alloyed in various proportions, as the mineral osmiridium or iridosime, which belongs to the rhombohedral...diamonds were bought and sold. The diamond-bearing district actually spread over a wide area on ‘the eastern...still persists is principally in the Bundelkhand district of the Central Provinces. The famous stones mined...of Bahia, especially in the Chapada Diamatina district in the southern part of the State. It is here |  | | 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 |  | | Journal (volume) | | (m.d.) Commission in French Indo-China in the Midlands :!, (m.d.)., .(m.d.) Mines, Nationalization...mines gives particulars of a successful mining district in South Scotland. Modern Rock-Drill Practice...Inst.M.E. 21 29 author, who is visiting the District in the interests of the Kirkland Lake Proprietary... the work of investigating the geology of the district was undertaken by members of the staff of Messrs...deposit has been found in the Roux- — ville district, Orange Free covery was made in the State |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Co., Bonanza mine, Trinity Co., Michigan Bluff district, Placer Co., in AK, placers at Fairbanks, Iditarod...and quartz veins at Juneau. In Canada, Noranda district, PQ; Porcupine, Kirkland Lake, and Larder Lake...deposits, ON; Atlin and Caribou, BC; and Klondike district, YT. In Mexico, Altar and Magdalena, SON; Parral...Ghana; Kilo and Moto, Zaire; Bulawayo and Hartley, Zimbabwe; Witwatersrand, South Africa, a belt of fossil...localities, AZ; Calico district, San Bernadino Co., Cerro Gordo(*), Inyo Co., Bodie district, Mono Co., and other |  | | Book | | carefully with the help of a geological guide to the district and a mineralogical text book in order to identify...Columbia; with gold at Witwatersrand, South Africa. Osmiridium Ir, Os This is the cubic, iridium-rich phase...as silica gel Iridosmine Os, Ir This is the osmiridium-rich the system content exceeds iridium-osmine...Co., California. Treatment. and Creek in district, Calaveras Clean with water. Krennerite AuTe...chalcopyrite in Norway and with pyrrhotine in the Sudbury district of Ontario; San Diego Co., California. Treatment | | | Book | | carefully with the help of a geological guide to the district and a mineralogical text book in order to identify...as silica gel. Iridosmine Os, Ir This is the osmiridium-rich member of the system Os-lr, in which the...dilute acid may be used as a cleaning agent. Osmiridium !r. Os This is the cubic, iridium-rich phase...Australia at Kalgoorlie; in the Cripple Creek district, Teller Co., Colorado and in Calaveras Co., California...in Norway and with pyrrhotine in the Sud¬ bury district of Ontario; San Diego Co., California. Treatment |  | | Book (edition) | | dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g....Noua, Banat, Romania. Also abundant at Bikita, Zimbabwe, where allophane and bikitaite are late hydrothermal...and at Sakangyi, Katha dist., Myanmar. At Mtoko, Zimbabwe, at Muiane, Alto Ligonha dist., Mozambique, and...both Gwanda Zimbabwe. AM 37, 462-469, 1952. NJbMM, 537, 1990. Austinite...important emerald districts of Africa are Sandawana, Zimbabwe, producing small stones with excellent color, |  | | Journal (volume) | | Distances to new placer districts 906 Fairbanks district output 1913 945 Fairbanks distrtot sts^mp-raiUs... . . j Glaciers Gold dredges Gold placer district, new Gold placer production Gold placers Coldstream... ••••••• Editorial rule In Nelchina placer district Nome storm Ditto Editorial.... • . .Editorial...Railway construction Rock-drilling contests Rubv district output 1913 Ruby, Innoko. and Iditarod districts...953 86 2SS 819 236, 355, 391, 627, district. district, district Canadian Geological Survey report |  | | Journal (volume) | | Ontario '111, {m.d.) Kirkland Lake Gold Mining District Kkkland Lake, History of 225, 161, 31, 100, Kirkland...Britain Oil in Hungary Oil in Mackenzie River District Oil in Palestine, Boring for Oil Oil Oil Oil.... in Palestine, Boring for Oil in Pas, The, District, Manitoba Pas, The, Mandy Mine at {m.d.) ...... {m.d.) {m.d.) Patents Published Peace River District, Oil Surveys of Pearls, Cultured Peat Power in...the fortunes and misfortunes of this old mining district, as well zine as details of the present scheme |  | | Book (edition) | | recently they have been found in gravels in the Somabula Forest, Rhodesia and at Liideritzbucht, German...largest part of the world's supply comes; Passau district in Bavaria; southern Bohemia; Korea; Madagascar;...at Monroe, Conn.; Brewer's mine, Chesterfield district, S. C.; near Cummins Abundant with silver ores...mountains, eastern Hungary and a less important Alpine district reaching from Carinthia through the Austrian Tyrol^and...Galician frontier. The third district, which is the most important district in Europe, is in Transylvania |  | | Book (edition) | | and advanced tech- A tea plantation in Thyolo District, Malawi In other areas, an exchange economy has...expatriates were li1nited to a few missionaries and district officers. Juba is over goo miles (1,450 km) and...characteristically come from the so-called Oil Rivers District i11 the eastern states, and most of the kernel...miles ( 1oo km) inland from Conakry in the Kindia district and around Mamou , and are grown under a system...raffia palm, is used for making brooms. The Sherbro district of Sierra Leone has practically a world monopoly |  | | Book (volume) | | HARRIE) A Catalogue of the Birds me* ^th m ne district of Church Stretton. See CAMP* BELL-HYSLOP (C...] M#J> 8. Gr 1911. Deposits of the Tyrone district, 53 : 4 pis., 6 maps (1 geol. col.), text New...Phosphate fields, Montana. The Dunkleberg mining district, Granite County, Montana. See UNITED STATES...Scientific Park (JAMES) The Geology of the Oamaru district, North Otago (Eastern Otago division), pp. viii...Compte-rendu d'un resume en fran9ais. voyage dans le district de Viluisk RUSS. pp. 64 : 1 map. See ST. PETERSBURG |
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