| | Journal (article/letter/editorial) | data of BIFs from the greenstone terranes of the Zimbabwe and Kaapvaal cratons. The study revealed that...geochemistry of some BIF-hosted gold deposits in Zimbabwe and considers mineralogical and geochemical aspects...greenstone belts of the Kaapvaal and the adjacent Zimbabwe cratons (Fig. 1). The two cratons are separated...previously (Fripp 1976, Fos- S 126 BROOMSTOCK MINE _~7-" ZIMB,ABWE CRATON Distribution of ] ore zones...CRATO_N _ / / ~ /~ / ~ 9~ _ \ \ 9 shaft 7) Gwanda 8) Buchwa - Mweza 9) Pietersburg 10) Murchison | | | Journal (article/letter/editorial) | -HostedGold Mineralization in the Gwanda Greenstone Belt, Zimbabwe RUDOLF SAAGER,*THOMAS OBERTH/JR,AND...Germany Abstract The metamorphicrocksof the Archcan Gwanda greenstonebelt of southwesternZimbabwe consistof...which was obscuredby metamorphicoverprint. At Vubachikwe,discordantore stringersare explainedasmetamo...significantpart of the country'sforeignexchangeincome. In Zimbabwe gold mineralizationoccursgenerally in Archcangreenstoneterranes...1986, and our data). At presentonly the Bar 20, Vubachikwe, Blanket, and Lima mines are producing gold from | | | Journal (article/letter/editorial) | identical area, Broken Hill, New South Wales: Linnean Soc. New South Wales Proc., v. 108(1), p. 1-21....BANDED IRON-FORMATION-HOSTED IN THE GWANDA GREENSTONE BELT, ZIMBABWE--A GOLD DISCUSSION S. MASTER,G...iron-formation-hostedgold deposits of the Archcan Gwanda greenstonebelt in * Present address: Bundesanstalt...epigenetic.Tyndale-Biscoe (1940) suggested that, at Vubachikwe,poorlymineralizedreefswere impregnationsin relatively...and Hodgson(1986). On an undergroundvisit to Vubachikwe mine in 1987 (equallyas brief as the one made by | | | Journal (article/letter/editorial) | Ferruginous Quartzites (As Exemplified by the Zimbabwe Deposits) Ye. M. Nekrasov a a All-Union Research...Ferruginous Quartzites (As Exemplified by the Zimbabwe Deposits), International Geology Review, 26:1...FERRUGINOUS QUARTZITES (AS EXEMPLIFIED BY THE ZIMBABWE DEPOSITS) Downloaded by [Monash University Library]...who has studied regional metallogeny of gold in Zimbabwe. belts have been divided into three groups (Sebakwe...deposits of gold, located in sideritic and siderite-magnetite quartzites, are being exploited. The distribution | | | Journal (article/letter/editorial) | MINERALIZATION OF BANDED IN THE GWANDA IRON-FORMATION-HOSTED GREENSTONE BELT, ZIMBABWE--A GOLD REPLY R. SAAGER...mineralizationin iron-formations at the Vubachikwe mine because this supportsour genetic model and...not able to duplicateduringour in- ide-facies magnetite-bearingiron-formation which vestigations at the...mineralizationat the Vubachikwe chemistryof the ore-bearingbandediron-formation, mine is commonlycorrelatedwith...goldmineralizationat VubachikweandBar 20 must the Vubachikwe-Bar20 region which canbe traced take our observations | | | Journal (article/letter/editorial) | of Rhodesia. The occurrenceof gold at the Vubachikwe gold mine has been studied together with samplesof...Pickstone, and Sherwood Starr mines. At the Vubachikwe mine the orebodies occur in several thin beds of...Both he and Kleinot (1963), who later mappedthe mine in further detail,consideredthe gold to be of h...wasfaciI58 A detailed examination of the Vubachikwe mine has been made, and the stratigraphic situation...Investigationsin the Barbertongreenstonebelt, Group). South Africa (Viljoen and Viljoen, 1969a, 1970), Similar | | | Journal (article/letter/editorial) | Amm,1940;Goldberg, 1964;Lewis, Canada,Australia, Zimbabwe, SouthAfrica,Brazil,and lierworkers 1965) pointed...Theseincluderemobilizationof goldin bandediron-formation hosts Zimbabwe; Barberton; MorroVelho,Brazil).Thetwo earliersyngenetic...adaptedfromFripp's(1976a)modelforSebakwian timesin Zimbabwe. In developingcriteria for syngenesis or epigenesis...oxide thedeposits muts and Theron, 1975), on the mine scale(Groves (or carbonate) on a mesoscopic or microscopic...goldores.The oresare at Barberton, South Africa, and from Zimbabwe are characterized byhighconcentrations | | | Journal (article/letter/editorial) | Kalahari Goldridge deposit, Kraaipan Greenstone Belt, South Africa Received: 1 June 2005 / Accepted: 29 May...Springer-Verlag 2006 Abstract The Kalahari Goldridge Mine is located within the Archaean Kraaipan Greenstone...southwest of Mafikeng in the North West Province, South Africa. The ore body thickness varies from 15 to...BIF, which consists of alternating chert and magnetiteāchloriteāstilpnomelaneā sulphideācarbonate bands...of Geology, Rhodes University, Grahamstown 6140, South Africa Present address: N. Q. Hammond (*) Geological | | | Report (issue) | ZIMBABWE GEOLOGICAL SURVEY BULLETIN No. 90 The Erosion Surfaces of Zimbabwe L. A. LISTER, M.Sc., D.Phil...LIBRASĆ ZU - 06.01 Ćlungen ĆÆte Cstteilands 72& ZIMBABWE GEOLOGICAL SURVEY BULLETIN No. 90 iSRiC LIBRARY...Wagentngen, The Netherlands The Erosion Surfaces of Zimbabwe L. A. LISTER, M.Sc, D.Phil. ISSUED BY AUTHORITY...the erosion surfaces of Zimbabwe. She has lectured at the University of Zimbabwe since 1963 and this Bulletin...earlier authors had postulated. Cainozoic tilting in Zimbabwe, which raised the eastern margin of the country | | | Journal (article/letter/editorial) | pohwatp@si.edu Siderite Siete Suyos Mine, Atocha-Quechisla District Sud Chichas Province, PotosĆ Department...1. Gemmy siderite from Siete Suyos mine, Atocha-Quechisla district, Sud Chichas Province, PotosĆ Department...known to pseudomorph siderite include hematite, magnetite, quartz, cacoxenite, calcite, barite, and various...& MINERALS Figure 2. Siderite with quartz, from Mine Hill, Roxbury, Litchfield County, Connecticut. The...Very fine examples of siderite were collected from Mine Hill, Roxbury, Litchfield County, where large cleavage | | | Journal (article/letter/editorial) | Africa. of Botswana, the northeasternsegment of South The purposes of this paperare, briefly,to consider...+++ā¢+++++++* *++7+++**+ 19 BULAWAĀ¾O-9UBI + 20 FILABUSI -- 21 GWANDA ++++++++++ **+*++7+++++ +ā¢*++++*+++ *+ā¢**+++++++...GREENSTONE BELT LITHOLOGICAL UNITS RHODESIA/BOTSWANA SOUTH AFRICA/SWAZILAND Sedimentary unit ShamraJah Mafic-to-l'el$ic...Swazilandsuccession in the BarbertonMountainLand, South Africa. The distribution of the Lower Ultramafic...ith TABLE the Barberton Stratigraphic Model SOUTH AFRICA Barberton SWAZILAND Belt MOODIES MOODIES | | | Journal (article/letter/editorial) | THE Kolar schist belt of the Dharwar craton of south India is well knownfor its gold mineralizationand...oxidefaciesbandediron-formation by The Kolarschistbelt is a north-south-trending, 80fluidsgenerated frommetamorphic dewatering...Lodes ā¢1-ā¢BIF [ Iā¢ChampmnGnefss :ra::;t'c Gne,sses South Kolar SchfstBelt :..',ā¢Bonded IronFormorion Chompion...SulfideDeposits Sulfide facies iron-formation from Zimbabwe I Weight percent SiO2 2 3 4 5 6 7 8 9...Mallappakona ore, 2 -- Algomantype,Gross,1988, 3 = Vubachikwe,4: Bar20#1 (3 and4 fromSaageret al., 1987), 5 | | Olivo, G. R., Gauthier, M., Williams-Jones, A. E., Levesque, M. (2001) The Au-Pd Mineralization at the Conceicao Iron Mine, ItabiraDistrict, Southern Sao Francisco Craton, Brazil: An Example of aJacutinga-Type Deposit. Economic Geology, 96 (1) 61-74 doi:10.2113/gsecongeo.96.1.61 | Journal (article/letter/editorial) | Au-Pd Mineralization at the ConceiĆ§Ć£o Iron Mine, Itabira District, Southern SĆ£o Francisco Craton, Brazil:...3P8 Abstract The ConceiĆ§Ć£o mine, which is located in the Itabira district, southern SĆ£o Francisco craton...an altered Lake Superior-type iron-formation. The mine sequence consists of three metamorphosed lithostratigraphic...hematite grains (hematite II) with remnants of magnetite, and a finely laminated envelope around the quartz...Examples of this deposit class include the Homestake mine in the United States (Rye and Rye, 1974; Sawkins | | | Journal (article/letter/editorial) | 17) gold-ore bodies; 18) metasomatic carbonate-magnetite formations; boundaries of the Kshenskiy ore-controlling...volcanics of the Upper Tim subsuite (carbonate, magnetite-carbonate, gold, epidotetremolite Ā± sphene, pyrite...(metapicritic-tholeiitic basalt, meta-andesite-basalt, magnetite-plagioclase-nornblende slate, spilite, actinolite...pyrrhotite (1.5-10.0), chalcopyrite (0.2-5.0), magnetite (3.0-7.0), hematite (0.5-2.0), ilmenite (3.0-7...Australia, Gaita and Tangold, Tanzania, and Wanderer, Zimbabwe (Table 2). The quartz-vein subtype in the Kshenskiy | | Steadman, Jeffrey A., Large, Ross R. (2016) Synsedimentary, Diagenetic, and Metamorphic Pyrite, Pyrrhotite, and Marcasite at the Homestake BIF-Hosted Gold Deposit, South Dakota, USA: Insights on Au-As Ore Genesis from Textural and LA-ICP-MS Trace Element Studies. Economic Geology, 111 (7) 1731-1752 doi:10.2113/econgeo.111.7.1731 | Journal (article/letter/editorial) | Marcasite at the Homestake BIF-Hosted Gold Deposit, South Dakota, USA: Insights on Au-As Ore Genesis from...Paleoproterozoic Homestake deposit, northern Black Hills, South Dakota, is the largest banded ironformation (BIF)-hosted...that the volume of upper Poorman Formation in the mine area (approx. 12 km3) could potentially yield ~4...districts. Introduction The Homestake deposit in Lead, South Dakota (Fig. 1a-d), was among the worldās giant...Precambrian and Tertiary lithologies within the mine; (2) other gold deposits of known Tertiary age in | | | Journal (article/letter/editorial) | Vipond Series: decline into Hoyle Falconbridge pit, South Porcupine, Ontario. Fig. 2 (b). Coarse felsic agglomerate...agglomerate, probably a subaqueous pyroclastic flow; south pit rim, Dumagami surface orebody, Cadillac, Quebec...clasts of auriferous pyrite 1422 E drift, Pamour Mine, Timmins, Ontario. 354 R.W. HUTCHINSON Fig....sulfide (right) facies ironformation (exposure south of Mine Doyon pit, Cadillac, Quebec ). Fig. 3 (d). Single...ankeritic walls and quartz core ( 12th level, Dome Mine, South Porcupine, Ontario ). contain more sediment-hosted | | Phillips, G.N., Vearncombe, J.R., Anand, R.R., Butt, C.R.M., Eshuys, E., Groves, D.I., Smith, R.E. (2019) The role of geoscience breakthroughs in gold exploration success: Yilgarn Craton, Australia. Ore Geology Reviews, 112. 103009 doi:10.1016/j.oregeorev.2019.103009 | Journal (article/letter/editorial) | Australia of Earth Sciences, Stellenbosch University, South Africa. Resource Management Pty Ltd, Box 1093 Canning...inset area only. Water Tank Hill mine, Western Australia; magnetite to the left, pyrrhotite with high-grade...software enabling drilling, geology, structure, mine plans and grade to be portrayed with simple changes...before 1979, there was existing literature from mine geologists documenting quartz veins in banded iron...the synthesis of extensive literature and valuable mine records (Groves et al., 1986; Ho and Groves 1987 | | | Report (volume) | greenschistfacies metamorphism; the Vermilion district is located within this subprovince, southeast...with the Minnesota Geological Survey, along north-south lines spaced 0.4 km apart at an elevation of 90...WawaShebandowan subprovince which includes the Vermilion district of Minnesota, is a greenstone-granite terrane...and others, 1989). The terrane is bounded on the south by the Rainy Lake-Seine River fault. In the area...north and the Rainy Lake-Seine River fault on the south (fig. 3), the metavolcanic rocks, which Lawson ( | | | Report (issue) | GRANDFATHER TENNESSEE ~~ MOUNTAIN KIOKEE BELT SOUTH CAROLINA ug 5; āA BARTLETT'S/.2 FERRY FAULT ? ...Metallogeny Settings of Base and 1 Precious of the South-Central Sulfide Mineralization along Mountain,... for Volcanogenic Appalachians E. Geologic South Sulfide (Thornton The Aspects Carolina Faulkner...Carolina Robert Butler) District, 78 Southernmost at Four Gold Slate Belt Mine, 97 F. Hollister) ...Element Signature of Some Major Dahlonega District, Lumpkin County, Jc., and James R. Burnell, Jr | | | Book | Deposits of Principal Arcs ...... 64 1.6.1 Massive Magnetite Deposits ............... 1.6.2 Manto-Type Copper.................. . 83 The Fresnillo Ag-Pb-Zn District, Zacatecas, Mexico .............................Massive Sulfide Deposits of the BathurstNewcastle District, New Brunswick, Canada Discussion of Tectonic................... . 4.5.2 The Homestake Gold Mine, South Dakota .. 4.5.3 Pre-Metamorphic Stratiform Gold...Post-Metamorphic Quartz-Rich Vein Ores: The Sigma Mine, Quebec ................ . 4.5.5 Discussion and | | | Report (volume) | SALT LAKE CITY, Utah--Federal Bldg., Rm. 8105,125 South State St. SAN FRANCISCO, California--Customhouse...volcanic-hosted magnetite, by Dennis P. Cox 172 Grade and tonnage model volcanic-hosted magnetite, by Dan L...rock types 133 Cross section through the Kalavos district Cyprus showing relationship of massive sulfide...of volcanic-hosted magnetite deposits 173 Iron grades of volcanic-hosted magnetite deposits 174 Phosphorus...Phosphorus grades of volcanic-hosted magnetite deposits 174 Tonnages of carbonate-hosted Au-Ag deposits 177 | | | Journal (article/letter/editorial) | Chemical composition Line Maghemite Magnesite Magnetite Magnetite/vanadiferous Malachite Malayaite Maldonite...salinity as a result of devolatilization of subducted South Pennic rocks. During the Paleogene orogeny under...hanging wall. During a subsequent mining period, the mine was re-opened to recover sideritic parts of the...perthite), orthopyroxene (usually hypersthene) and magnetite, and is equivalent to an orthopyroxene bearing...rock that consists of serpentinized olivine, magnetite and apatite. Nepheline syenite composed chieļ¬y | | | Journal (article/letter/editorial) | Chemical composition Line Maghemite Magnesite Magnetite Magnetite/vanadiferous Malachite Malayaite Maldonite...salinity as a result of devolatilization of subducted South Pennic rocks. During the Paleogene orogeny under...hanging wall. During a subsequent mining period, the mine was re-opened to recover sideritic parts of the...perthite), orthopyroxene (usually hypersthene) and magnetite, and is equivalent to an orthopyroxene bearing...rock that consists of serpentinized olivine, magnetite and apatite. Nepheline syenite composed chieļ¬y | | | Report (issue) | 5). REFERENCIAS GENERALES Geological Society of South Africa, Special Publication 1 (1969); Economic Geology...Cu'mulo de ferrogabro haata diorita Capas de magnetite ricas en Ti y Y (Fe-Ti-YtipoBushveld) Cu'mulo...EJEMPLOS High Plateau, Del Norte County, USCA Goto Mine, Luzon, PLPN (Wells y otroa, 1946) (LeBlano y Violette...Nombre Ace of Spades Adobe Canyon Gp. Ajax Alice Mine Allan (Johnson) Alta Hill Althouse Alyce and Blue...etc Buttercup Chrome Camden Mine Campbell Camptonville area Castro Mine Cattle Springs Cavyell Horse | | | Book | and Central Queensland, 1974 . South Australia, 1975 . Illawarra District, 1976 . Tasmania, 1977 . North...uranium treatment plant Managing the Ranger Uranium Mine in the Alligator Rivers Regionāthere is much more...Whiteās overburden heap Mine planning and scheduling at Ranger Uranium Mineāenvironmental requirements...design and operating aspects of the Ranger Uranium Mine treatment plant Laboratory study of the subaerial...Some recent changes and innovations at Mount Isa Mine Commissioning and operation of the 800 TPH heavy |
|