 | | 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... calcite, arsenopyrite, pyrite, pyrrhotite, chalcopyrite. Phase 2. Chlorite, epidote, calcite, gold,... native Bi, Bi-Pb sul®des, galena, chalcopyrite, fahlore, pyrite, Fe-gersdorte. Editorial handling:...parageneses: ± Gold + Bi-Pb sul®des + bismuth + chalcopyrite + galena, associated with chlorite (Au 1). ± |  | | 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...group. In hydrothermal veins. Association: Chalcopyrite, pyrrhotite, pyrite, millerite, gersdorffite...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...Tetrahedrite, linnaeite, siegenite, polydymite, chalcopyrite, bornite, digenite, djurleite, chacocite, pyrrhotite...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 |  | | 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 |  | | Journal (article/letter/editorial) | | Zambian Copperbelt. They are associated with chalcopyrite. These exsolution textures were observed by...16.8 41.6 IOO.O 9.405 1.3 0.9 0.9 3o96 Madziwa Mine I* 31.O 18.1 8.9 42.6 IOO.6 9.436 1.6...41.6 1 0 0 . 5 9.46I I.I 1.7 0.3 3295 Madziwa Mine I** 32.8 19.8 5.3 42.4 1 0 0 . 3 9.438...the M a d z i w a Mine (formerly the Dry Nickel Mine), Bindura, Rhodesia (Zimbabwe). At M o u n t Colin...FeOy. The primary cobaltian violarite from the Madziwa Mine occurs as coarse euhedral crystals associated |  | | 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 |  | | 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...California, USA; contains trace chalcopyrite. (3) FeNi2 S4 . Mineral Group: Linnaeite group. Occurrence: ...Pyrrhotite, millerite, chalcopyrite, pentlandite. Distribution: In the USA, from the Friday mine, Julian, San...California; the Key West mine, Clark Co., Nevada; the Copper King mine, Gold Hill district, Boulder Co., Colorado; |  | | Journal (article/letter/editorial) | | Sweden (Sverige) Gladhammar mine, nickel-rich carrollite, 737 Harstig mine, Pajsberg, sarkinite, 681 Norr6...Norr6, arrojadite (hiihnerkobelite), 23o Sjo mine, Grythytte Parish, Orebro, xantharsenite, polyarsenite...calcite, baryte, celestine, sphalerite, pyrite, chalcopyrite, analcime, 76I Castleton, Derbyshire, fluorite...Cornwall, luxullianite, 441; 442 Scar Crag, Lake District, arsenopyrite, alloclase, glaucodot, cobaltian...Court farm, Ramsgate, Kent, chalk, i6o Tynebottom mine, Garrigill, Cumbria, arsenical marcasite, gersdorffite |  | | Journal (article/letter/editorial) | | the MKD5 nickel sulphide orebody at Mount Keith, central Western Australia. These lamellae are interpreted...(Keele and Nickel, 1974), and with polydymite, chalcopyrite, pyrite and secondary violarite (Riley, 1980)...form part of the Agnew-Wiluna greenstone belt, in central Western Australia. Disseminated Ni-Fe-sulphide...geological cross-section through the MKD5 orebody (Mine grid 31760N) showing locations of hypogene violarite-bearing...1974) and the Madziwa mine, Zimbabwe (Riley, 1980). As can be seen, MKD5 and Madziwa mine hypogene thiospinels |  | | Journal (issue) | | Geological Society of Zimbabwe Newsletter February, 2011 Geological Society of Zimbabwe G Z S Newsletter...SOCIETY OF ZIMBABWE, P.O. BOX CY 1719, CAUSEWAY, HARARE Geological Society of Zimbabwe Newsletter ...……………………….. Geology Department, University of Zimbabwe ……………………………………… Geological Survey Department ...Committee, on behalf of the Geological Society of Zimbabwe, would like to offer a sincere vote of thanks...debeer@cadline.co.zw 2 Geological Society of Zimbabwe Newsletter February, 2011 Editorial Here we |  | | Journal (issue) | | Geological Society of Zimbabwe Newsletter June, 2011 Geological Society of Zimbabwe 1960 -2010 G S Z...Newsletter June 2011 Tectonic evolution of the Zimbabwe Craton in the early Palaeoproterozoic. (a) Following...Following Söderlund et al. (2010), the Zimbabwe craton is positioned along the eastern margin of the Superior...basin initiated. (c) Assembly of the Kaapvaal and Zimbabwe cratons, and unknown terrane, Terra Incognita...Incognita at ca. 2.0 Ga led to tectonic escape of the Zimbabwe Craton and dextral shearing in the Limpopo Belt |  | | 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...drillholes and are composed of pentlandite, chalcopyrite and pyrite (Fig. 3b). Pyrrhotite has not been...disseminated pyrrhotite, pentlandite and AC chalcopyrite. 4. Methods Samples with primary magmatic...complex feeder zone of the large Madziwa Igneous Complex intrusion in Zimbabwe. The peridotites may represent |  | | 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) | | BELTS ! SINOIA-SIPOLILO + + 2 MT OARWIN + 3 SHAMVA-SALISBURY 4 MTOKO 5 MIOLANDS 6 MWANESt 7 WEDZA...the threefold sub- fides (pyrite, pyrrhotite, chalcopyrite) occurringin divisionof the stratigraphyof the...or other causes,the pyrrhotiteand pentlandite,chalcopyrite,pyrite, viomost destructiveof which appearsto...1970). The mineralization consistsmainly of chalcopyrite,pyrite, pyrrhotite, and pentlandire. Little...Shanganimine, and in greenstoneremnantsin the Madziwa batholith,north of the Trojan deposit (Fig. 3) |  | | Journal (article/letter/editorial) | | the Main Sulfide Zone (MSZ) of the Great Dyke, Zimbabwe—see Maier (2005) for a summary of global occurrences...46:841–857 by sulfides (pyrrhotite–pentlandite–chalcopyrite), except in some chromitite reefs where the...(which may be dominant in komatiitic ores) and chalcopyrite (which may be dominant in gabbronoritic ores...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) | | mineral is stretched during tensile stress; Top: The central elongated tatya- boudinage-like textures would...reduced to metal state). Left (top): Ag-rich chalcopyrite in contact with gustavite (Ag-containing Pb-Bi-sulfide)...left and right side of the image); possibly, chalcopyrite was enriched in Ag through solid state diffusion...ilmenite or extra Fe in Cu-sulfides, such as chalcopyrite. 11 Exsolution (continued) This process presents...Right: Cross-like sphalerite exsolution (grey) in chalcopyrite matrix (yellowish). Right: Patchy, almost myrmekitic |  | 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 (edition) | | 01-50 Coloradoite II/C.01-60 Lautite II/C.02-10 Chalcopyrite II/C.03-10 Eskebornite II/C.03-20 Lenaite II/C...Myrmekitic intergrowth of native silver (white), chalcopyrite (olive), and cabriite (pinkish cream, slight...(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 |  | | 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) | | 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 | | Bismuthinite Bomite Boulangerite Cassiterite Chalcocite Chalcopyrite Chromite Cinnabar Cobaltite Copper Covellite...see page 102 on chalcopyrite, in the section headed ‘colour’. The indicates ‘chalcopyrite next to . . .... ’, so chalcopyrite next to galena may appear to be more yellow than if it is on its own, or next to...minerals) 3. FAINTLY COLOURED Blue Covellite Chalcopyrite Millerite Cubanite Psilomelane Hematite Proustite...within it. Samples which have been collected in a mine or open pit exhibit more abundant reflections as |  | | 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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