 | | Journal (article/letter/editorial) | | 1295–1312 The Nickeliferous Archean Madziwa Igneous Complex, Northern Zimbabwe: Petrological Evolution, Magmatic...Johannesburg, South Africa Abstract The nickeliferous Madziwa Igneous Complex consists of several lenticular...vertically oriented layered suite comprising a central pyroxenite layer, plus norite as both a continuous...Ni-Cu sulfides are primarily hosted within the central (ortho- to mesocumulate) pyroxenite adjacent to...bulk assimilation of country rock gneiss by the Madziwa magma and sulfide segregation triggered by felsic |  | | Journal (article/letter/editorial) | | the Freda-Rebecca gold deposit ± Bindura District, Zimbabwe Received: 4 January 1999 / Accepted: 13...Abstract The Freda-Rebecca Mine is currently the largest gold producer in Zimbabwe. The ore deposit is hosted...clinozoisite/epidote, quartz, calcite, arsenopyrite, pyrite, pyrrhotite, chalcopyrite. Phase 2. Chlorite, epidote, calcite...wedged between the Chinamora, Murehwa 91 and Madziwa batholiths. The greenstone sequence of 2.72±2.65...sequence. They mark the transition to the ``Lower Shamva Formation'' of rhyolitic, dacitic and andesitic |  | | Report (issue) | | 42.14 Total [100.00] 100.3 100.00 (1) Grünau mine, Germany; recalculated to 100% after deducting gersdorffite...(Ni2.83 Fe0.22 Co0.03 )Σ=3.08 S3.92 . (2) Madziwa mine, Zimbabwe; by electron microprobe, corresponds to...hydrothermal veins. Association: Chalcopyrite, pyrrhotite, pyrite, millerite, gersdorffite, ullmannite...siderite. Distribution: In Germany, in the Grünau mine, Daaden, near Siegen [TL], and at Ramsbeck, North...Rhine-Westphalia. From Saint Marina, Khaskovo district, Bulgaria. At Kunratice and Rozany, Czech Republic |  | | Report (issue) | | 94 Co1.92 Ni0.20 Fe0.05 S4.00 . (4) Mineral Hill mine, Maryland, USA; corresponds to Cu0.48 Co1.88 Ni0...chalcopyrite, bornite, digenite, djurleite, chacocite, pyrrhotite, pyrite, sphalerite, millerite, gersdorffite...Maryland, in the Patapsco mine, Finksburg [TL], and the Mineral Hill mine, Sykesville. At Boleo, Baja...California, Mexico. In the Carrizal Alto copper district, Atacama, Chile. From near Chernomorets, Burgas...Slovakia. In the Kohlenbach mine, near Eiserfeld, and throughout the Siegerland district, North Rhine-Westphalia |  | | Journal (article/letter/editorial) | | Department of Geology, University of Zimbabwe, MP167, Harare, Zimbabwe (Manuscript ucceptecl July 14, 1997)...metamorphic data froni the Trojan nickel mine area i n the Shamva-Bindura Greenstone Belt (SBGB) show that...stratigraphy, while metamorphic conditions in the mine area reached about S O O T at pressures of 3-4 kbar...rccrystallisation of M, assemblages. M? temperatures in the mine area reached 565°C. Such high contact metamorphic...mantled-gneiss, nappe structure represented by the Madziwa Batholith and a mantle of mafic greenstones to |  | | 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...for views of Wankie Colliery and the Trojan nickel mine, and to the Photographic Section of the Ministry...Marginal Zone Central Zone 46 47 48 51 The Zambezi Metamorphic Belt . Western Section Central Section Eastern...near Salisbury. facing page 23 IV Trojan Nickel Mine, near Bindura. facing page 33 V The Great Dyke |  | | Report (issue) | | ------------3. Nickel deposits in the Sudbury district, Ontario, Canada-----------------------4. Nickel...------------------9. Proportions of total world mine production of nickel accounted for by countries...-------------------------------------10. Nickel mine production in countries having major deposits and...----------------Estimated cumulative and annual mine production of nickel, contained in ore, concentrate...each country having a major nickel deposit or district ---------------------4. By economic class of |  | | Journal (article/letter/editorial) | | the MKD5 nickel sulphide orebody at Mount Keith, central Western Australia. These lamellae are interpreted...form part of the Agnew-Wiluna greenstone belt, in central Western Australia. Disseminated Ni-Fe-sulphide...Ni-Fe-sulphide minerals (dominated by pentlandite, pyrrhotite, millerite and pyrite) occur as an intercumulus phase...The bulk of the ore zone comprises pentlandite+pyrrhotite assemblages in a well-de ned, steeply-dipping...relative to the Pentlandite Domain, and contains no pyrrhotite. Sulphide assemblages in the Millerite Domain |  | | Report (issue) | | a = 9.51 Z=8 X-ray Powder Pattern: Vermilion mine, Sudbury, Canada. 2.85 (100), 1.674 (80), 1.820...00 (1) Vermilion mine, Sudbury, Canada; contains trace chalcopyrite. (2) Friday mine, Julian, California...hydrothermal origin, with other sulfides. Association: Pyrrhotite, millerite, chalcopyrite, pentlandite. Distribution:...USA, from the Friday mine, Julian, San Diego Co., California; the Key West mine, Clark Co., Nevada; the...the Copper King mine, Gold Hill district, Boulder Co., Colorado; the Lick Fork deposit, Floyd Co., Virginia; |  | | Report (issue) | | resources and mine production by geologic deposit type. . . 5. Distribution of cobalt resources and mine and metal...TABLES Page TABlE 1. 2. 3. 4. 5. 6. World cobalt mine production 1977-83................................1983................ v S 6 9 10 13 14 16 8. Mine production of cobalt in 1983 by geologic deposit...production of cobalt-in-ore, 189~1982.......... Mine production of cobalt in 1983 by economic class of...example those of New Caledonia or the Sudbury district (Canada), have made little effort to evaluate |  | | Journal (article/letter/editorial) | | gradients in which very low grades typical of the central craton pass into extremely high grades that define...Gatooma-Hartley; (11) Gwanda; (12) Gwelo; (13) Lonely Mine; (14) Lower Gwanda; (15) Makaha; (16) Mashaba; (17)...(22) Salisbury; (23) Selukwe; (24) Shabani; (25) Shamva-Bindura--Mazoe; (26) Sinoia; (27) Sipolilo;(28)...successions are noted, viz. 12 km in the Bulawayo District (Amm, 1940), 24 km at Hunters Road, Gwelo (Macgregor...'hornblende + chlorite + e p i d o t e + quartz + pyrrhotite plagioclase + pale green a m p h i b o l e + |  | | Journal (article/letter/editorial) | | Abitibi greenstone belt (Canada), as well as in Zimbabwe (Prendergast, 2003) and in the Komati Formation...ultramafic composition have been observed in the McLeay mine and in drillholes NU around the McLeay deposit...pentlandite, chalcopyrite and pyrite (Fig. 3b). Pyrrhotite has not been observed. On the direct contact...euhedral pyrite and irregular blebby disseminated pyrrhotite, pentlandite and AC chalcopyrite. 4. Methods...complex feeder zone of the large Madziwa Igneous Complex intrusion in Zimbabwe. The peridotites may represent |  | | Journal (article/letter/editorial) | | BELTS ! SINOIA-SIPOLILO + + 2 MT OARWIN + 3 SHAMVA-SALISBURY 4 MTOKO 5 MIOLANDS 6 MWANESt 7 WEDZA...southern Africa, the threefold sub- fides (pyrite, pyrrhotite, chalcopyrite) occurringin divisionof the stratigraphyof...mineralization consistsmainly of chalcopyrite,pyrite, pyrrhotite, and pentlandire. Little is known of the depositsbut...Shanganimine, and in greenstoneremnantsin the Madziwa batholith,north of the Trojan deposit (Fig. 3)...greenstonebelt, intrusive granites. The Scotia Talc Mine in the halfway betweenthe Great Dyke and the Empress |  | | Journal (article/letter/editorial) | | termination based on composite of Kalatongke and the Central Asian orogenic belt (CAOB) intrusions; (F) Huangshandong...mafic-ultramafic intrusion-hosted deposits in central Finland (Makkonen, 2015), Radio Hill (De Angelis...shown in Figure 1D-G. Numerous intrusions in the Central Asian orogenic belt, of which Huangshandong (Fig...within norite, and tonalite. All within matrix of pyrrhotite-dominated sulfide ($); clasts show soft disaggregating...variation on the theme is seen in the Madziwa Igneous Complex, Zimbabwe (Prendergast and Wilson, 2015), where |  | | Journal (article/letter/editorial) | | the Main Sulfide Zone (MSZ) of the Great Dyke, Zimbabwe—see Maier (2005) for a summary of global occurrences... Miner Deposita (2011) 46:841–857 by sulfides (pyrrhotite–pentlandite–chalcopyrite), except in some chromitite...sulfide minerals are however similar, consisting of pyrrhotite, pentlandite (which may be dominant in komatiitic...cratons include the Kaapvaal (mainly PGE deposits), Zimbabwe (Ni–Cu and PGE), Yilgarn (Ni–Cu only), Superior...Norrbotten cratons; southern and central Africa, including the Kaapvaal, Zimbabwe, Tanzania and Congo cratons; |  | | Book (edition) | | nature when observed under XPL; the matrix is pyrrhotite. Left (bottom): Polysynthetic hematite twinning...mineral is stretched during tensile stress; Top: The central elongated tatya- boudinage-like textures would...Colour & Ø Reflectance light brown, similar to pyrrhotite; 40.00 brownish tints; 39.24 light to brownish...visible Internal Twinning Reflect. Troilite yes Pyrrhotite yes Stibnite moderate, light lamellar and... Mineral Descriptions Molybdenite in Graphite; Bogala Mine, Sri Lanka 51 Copper, native Synonym(s): Cuivre |  | Hodges, C.A., Cox, D.P., Singer, D.A., Case, J.E., Berger, B.R., Albers, J.P. (1984) U.S. Geological Survey-INGEOMINAS mineral resource assessment of Colombia. Open-File Report Vol. 1984 (84-345) US Geological Survey doi:10.3133/ofr84345 | Report (issue) | | Tertiary/Quaternary volcanic rocks of the Cordillera Central are favorable hosts for hot spring gold-silver...zones in young volcanic rocks of the Cordillera Central and southern Cordillera Occidental may well be...complex mineralogy (such as the California-Vetas district) would be useful, not only for exploration in...Cretaceous sandstones and shales dominates the central part of the Cordillera Oriental (Etayo-Serna and...in post-middle Miocene time. (4) The Cordillera Central, which contains Precambrian and Paleozoic crystalline |  | | Book | | USSR Academy of Sciences, Chernogolvka, Moscow district, U . S . S . H . J. Foden, Bureau of Mineral Resources...Rhodesia, Box M.P. 167, Mount Pleasant, Harare, Zimbabwe. R.W. Ojakangas, Department of Geology, University...O. B o x . MP. 1 6 1 , Mount Pleasant, Harare, Zimbabwe. B.F. Windley, Department of Geology, University...AND PETROGENETIC IMPLICATIONS, ARUNTA INLIER, CENTRAL AUSTRALIA. A.Y. Glikson and J. Foden 281 EVOLUTION...MINERALISATION IN THE EARLY PRECAMBRIAN CRUST OF ZIMBABWE J.F. Wilson and T.H.C. Nutt 555 MINERAL OCCURRENCES |  | | Report (volume) | | Blenkinsop examine Archaean deformation patterns in Zimbabwe and the adjacent Limpopo Belt and discuss the...Stratigraphic and tectono-stratigraphic problems in Zimbabwe and Western Australia are described in the next...gold mineralization in the Kadoma region of the Zimbabwe Midlands. Three papers describe the structures...and cross sections showing the evolution of the central Asian basins. This collection of papers therefore...larger than life, professors in geology, with a central role in guiding the future of research and geological |  | | Book | | Proustite Psilomelane Pyrargyrite Pyrite Pyrolusite Pyrrhotite Rutile Scheelite Silver Sphalerite Stannite Stibnite...Cobaltite Pyrite Magnetite Niccolite Marcasite Pyrrhotite Enargite Ilmenite with other minerals or fragments...(initially) to recognise: Molybdenite: Bismuthinite: Pyrrhotite: Millerite: 4.1.4 white-grey to white white-grey...within it. Samples which have been collected in a mine or open pit exhibit more abundant reflections as...Stibnite Molybdenite Galena Cubanite Boulangerite Pyrrhotite Chalcopyrite Pyrargyrite Tetrahedrite Chalcocite |  | | Book (edition) | | 298 300 302 304 306 308 310 312 314 316 318 Pyrrhotite Smythite Nickeline Breithauptite Freboldite Polarite...(yellowish white), quartz (dark grey); New Bullfrog mine, Nye Co., Nevada, USA [h]; Nic. // Anhedral electrum...(greenish grey), quartz (dark grey); New Bullfrog mine, Nye Co., Nevada, USA [h]; Nic. // Anhedral electrum...(bluish grey shades), quartz (dark grey); New Bullfrog mine, Nye Co., Nevada, USA [h]; Nic. // 8 Gold A ...white), goethite (dark grey); Privolnoye deposit, Central Yakutia, Russia [h]; Nic. // B Amalgam (dark grey) |  | | Report (volume) | | rock types 133 Cross section through the Kalavos district Cyprus showing relationship of massive sulfide...based on considerations that extend far beyond the mine itself, in some instances relating to the overall...subject, as in a scale model of the workings of a mine, to a unifying concept that explains or describes...represents an individual deposit (or, rarely, a district), cumulated in ascending grade or tonnage. Where...government believed might someday be economic ta mine. Stratiform deposits of large areal extent, such |  | | Book | | reasons for the approach taken Mineral deposit or mine? A genetic model as the basis for exploration The...many geologists who have given their time during mine visits and responded to our queries. We have benefited...Decline Doline A downward inclined tunnel into a mine or potential ore body. A funnel-shaped depression...shaft excavated upwards for connecting levels in a mine or ore body. Ripping The removal of overburden...of the problems which face the mine geologist. The function of the mine geologist varies considerably |  | | Book | | problem is like no other problem in geology. It is central to the human condition, and it is worth pursuing...work, ranging from the group of fellow workers in Zimbabwe (M.J. Bickle, A. Martin, J.L. Orpen, J.F. Wilson)...debt to those geologists who have worked for the Zimbabwe Geological Survey and its predecessors over the...Special Publication of the Geological Society of Zimbabwe, R.P. Foster (ed.), by permission of A.A. Balkema...Surv. Bull. No. 67 by permission of the Director, Zimbabwe Geological Survey; Figure 6.3 reproduced from |  | | Report (issue) | | holdings. Prior to 1978, the development of complete mine property cost evaluations was impeded by still evolving...tool. Systems design work also continued on the mine simulation (MINSIM) program, an economic evaluation...reserves. These include implications that because a mine is operating it is profitable, that reported reserves...prices, which are variable over the life of the mine. Economic evaluation is complicated by the presence...and economic variables on viability of individual mine properties (17-18). Nonproducing deposits Producing |
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