 | | Report (chapter) | | Along the Margin of the Kalahari Craton in Swa/Namibia and Botswana G. Borg and K. J. Maiden Geological...along the margin of the Kalahari Craton in SWA[Namibia and Botswana G. Borg & K. J. Maiden S U M M A R...the basins of K l e i n Aub, D o r d a b i s / Witvlei and Lake N ' G a m i (Fig. 1). The stratigraphy...Proterozoic basins (black): Klein Aub (1); Dordabis/Witvlei (2) and Lake N'Gami (3). From PHARAOH,T. C., BECKINSALE...the Doornpoort and Eskadron Formations in SWA/Namibia (SACS 1980) and the upper part of the K'Gwebe Formation |  | | Journal (issue) | | OcronER2011 The Kalahari Copperbelt in Central Namibia: Controls on Copper Mineralization Kenneth J. Ma/dent...central Namibia lo northern Botswana (Figure I; Borg, 1988; Borg and Moiden, 1989). In centml Namibia, copper...controlled sites lotc in the deformation histmy of the region. The conclusion of the prcscnl review is that economically...~tretches discontinuously for 800 km from central Namibia to northern Botswana (Borg and Maiden, 1989). Copper...sector of the belt, particularly arow1d Klein Aub, Witvlei, and Dorclabis, for many years (see, for example |  | | Journal (article/letter/editorial) | | andwhichmayalsobepartof the DordabisSupergroupof Namibia. In the northwest, miogeosynclinal Damaralimestones...AND MARENG}VA to the wholebelt. From evidencein Namibia (Anhaeusser and Button,1974) the DamaraSupergroup...evidentlysuffereddeformationand erosionprior to Damarasedi- Namibia acrossBotswanainto Zambia,representing a widespreadcoversequence...zationalso occurswell to the east of the Pikwe region and is related to an ultramafic belt (Tsetsejwe-Thune)...(south) and lower (north) limbs. the northern border region, immediately south of Selebi North has somesurfaceexpression |  | Maiden, K.J., Innes, A.H., King, M.J., Master, S., Pettitt, I. (1984) Regional controls on the localisation of stratabound copper deposits: Proterozoic examples from southern Africa and south Australia. Precambrian Research, 25 (1) 99-118 doi:10.1016/0301-9268(84)90026-3 | Journal (article/letter/editorial) | | Africa) 2 Klein Aub Copper Mine, Klein Aub (SWA/Namibia) 3 Formerly M.T.D. (Mangula) Limited, Mhangura...deposits. The areas studied are: (1) Klein Aub in SWA/Namibia, where deposits are hosted by dark argilites in...mineralisation varies from region to region, and may even vary within the one region; it is not uncommon for...GEOLOGICAL SETTING OF SELECTED DEPOSITS Klein Aub, SWA/Namibia Klein Aub mine is at the south-western extremity...SBAY / > I ~i:::i:~!iiii:i:iiiilt!#:i:!:!~ f WITVLEI " ~'~ I oo B,s ] ' (X /~i~ ~ GHANZ1~2.:~::i |  | | Journal (article/letter/editorial) | | centralAfricancopper thenortheastern extension Aub, Namibia,wherean orebodyof 7 Mt at a gradeof 2 beltinZa...subeconomiccratonicbranch,whichis up to 400 km widein Namibia, copperoccurrence with 1.5 to 2 percentCu is locatedat...a width of 180 to 240 km into Botswana,as Witvlei, Namibia (Anhaeusserand Button, 1973; Ruxtonand canbe...southwestern part of the sures of basementrocks in Namibia, but in northwestern Ghanzi-Chobe beltby Lithedand(1982)...Botswana, theonlyrecordisfromtheOkwaValleyat a dis- Namibia(Hegenberger andSeeger, 1980;Killick,1983).This |  | | Journal (article/letter/editorial) | | abgelagert haben. Sie bestehen aus den Klein Aub-, Witvlei-, Ghanzi- und Tsumis-Formationen, die als das Xquivalent...Kalkstein und Schieferton, kommt in den Klein Aub- und Witvlei-Formationen sowie in den Unter-Ghanzi-Formationen...unmetamorphosed strata are composed of the Klein Aub, Witvlei, Ghanzi and Tsumis Formations which are regarded...limestone and argillite occurs within the Klein Aub, Witvlei and Lower Ghanzi Formations. The mineralized strata...m~tamorphis~es se composent des Formations Klein Aub, Witvlei, Ghanzi et Tsumis, qui sont regard~es comme l'6quivalent |  | | Book | | REPUBLIC OF NAMIBIA - MINISTRY OF MINES AND ENERGY GEOLOGICAL SURVEY THE MINERAL RESOURCES OF NAMIBIA FIRST...ENERGY Of the several hundred minerals present in Namibia, around sixty have been exploited. some, such as...base metals and industrial minerals have helped Namibia rank amongst the top five mining countries in Africa...terms of production and reserves. In this context, Namibia is a major producer of copper, lead, zinc, cadmium...unpublished. It is evident that mineral exploration in Namibia, as elsewhere. has changed from serendipitous discoveries |  | | Report (issue) | | following minerals deposited in zones in this order: chalcocite and other CU S minerals, bornite, chalcopyrite...pyrite, and 2 subordinate galena and sphalerite. Chalcocite forms near the oxidized source of copper; pyrite...exposures may be completely leached. Secondary chalcocite enrichment is not present in many deposits because...involved in mining sediment-hosted copper deposits. Chalcocite and bornite in the high-grade zone are fairly...hydrothermal overprint on sedimentary–diagenetic bornite-chalcocite mineralization. Arsenic, cadmium, mercury and |  | | Journal (article/letter/editorial) | | progressively replaced by bornite,neodigenite, and chalcocite. A basically syndepositional geneticmodelfor...gradationfrom neodigeniteto chalreplaced by primary chalcocite (cc). Covellite cociteis often very subtle. All...progressivelyreplacedby bornite, neodigenite,and chalcocite(Fig. 5 and 12). The highestAg values(oftenexceeding...have been recordedin the per mineralization of Witvlei, South West Africa, Hanging wall reef, where galenais...below 5,000 grams/metric bornite, neodigenite,and chalcocite,is of supergene ton. Sincethe samplecontainedless |  | | Journal (article/letter/editorial) | | galena-calcite, chalcopyritecalcite,bornitc-calcite, chalcocite-chlorite, andchalcopyrite-ankerite. Gangueminerals...zones. Thisinferredparagenesis suggests that the chalcocite-chlorite zoneis moreproximalto the sourceof ore...ts hostedby theRevett Formationwere found in a region sincecalled the "coppersulfidebelt of the Belt...the Revett OF MISSOULA, ADJACENT enite, and chalcocite. These minerals are located in 48o5o• VICINITY...continuously mineablerock with bornitc, digenite,chalcocite,andnativesilverasthe principal ore mineralswithin |  | Milani, Lorenzo, Kinnaird, Judith A., Lehmann, Jérémie, Naydenov, Kalin V., Saalmann, Kerstin, Frei, Dirk, Gerdes, Axel (2015) Role of crustal contribution in the early stage of the Damara Orogen, Namibia: New constraints from combined U–Pb and Lu–Hf isotopes from the Goas Magmatic Complex. Gondwana Research, 28 (3) 961-986 doi:10.1016/j.gr.2014.08.007 | Journal (article/letter/editorial) | | contribution in the early stage of the Damara Orogen, Namibia: New constraints from combined U–Pb and Lu–Hf isotopes...sources. The Goas Magmatic Complex in Central Namibia consists of a suite of variably metamorphosed gabbros...Windhoek geological maps, Geological Survey of Namibia). 964 L. Milani et al. / Gondwana Research 28...detrital zircon dataset of 462 ages from Central Namibia. The summary plot is reproduced in a probability...Gondwana Research 28 (2015) 961–986 northern Namibia (Lobo-Guerrero Sanz, 2005), at Navachab Mine, in |  | Batumike, M.J., Cailteux, J.L.H., Kampunzu, A.B. (2007) Lithostratigraphy, basin development, base metal deposits, and regional correlations of the Neoproterozoic Nguba and Kundelungu rock successions, central African Copperbelt. Gondwana Research, 11 (3) 432-447 doi:10.1016/j.gr.2006.04.012 | Journal (article/letter/editorial) | | increase southward in the Nguba basin. In the southern region, the Kyandamu Formation contains clasts from the...Ubendian belt (2.1–1.8 Ga) is observed in the “Domes region” (Unrug, 1988) and within the Katangan belt (Cahen...western part of the Lufilian Arc (Kolwezi-Tilwezembe region, Fig. 1) as an unsorted grey or greenish grey conglomerate...and may be faceted or striated. In the western region, this formation contains a continuous horizon that... from bottom to top (François, 1973a). In that region, total thickness increases from 25 m in Kakanda |  | Hayes, T. S., Landis, G. P., Whelan, J. F., Rye, R. O., Moscati, R. J. (2012) The Spar Lake Strata-Bound Cu-Ag Deposit Formed Across a Mixing Zone Between Trapped Natural Gas and Metals-Bearing Brine. Economic Geology, 107 (6) 1223-1249 doi:10.2113/econgeo.107.6.1223 | Journal (article/letter/editorial) | | with the lowest CH4/CO2 ratios from high-grade chalcocite-bearing ore, and the highest from the chalcopyrite-bearing...very low δ13C values approximately envelopes chalcocite-bearing ore. Sulfur isotope data of Cu, Pb, and...peneconformable deposits, typically dominated by chalcocite but strongly zoned both laterally and vertically...bornite (plus magnetite in some deposits), then by chalcocite (plus hematite in all deposits known to us)....Zone relations between the albite zone and the chalcocite-chlorite zone are dashed because such a boundary |  | | Journal (article/letter/editorial) | | —FeS2 Cu + Ag—Pb—Zn Cu + Ag—Pb Cu—(Ag—Pb)—Zn Witvlei Belt Series Mt Isa REFERENCES -> Cu + Ag—Pb—Zn...result in disparate zoning because Cu occurs as chalcocite, bornite or chalcopyrite, in these deposits instead...study of the copper-bearing formations in the Witvlei Area, South West Africa. Circ. Econ. Geol. Res |  | Aleinikoff, J. N., Hayes, T. S., Evans, K. V., Mazdab, F. K., Pillers, R. M., Fanning, C. M. (2012) SHRIMP U-Pb Ages of Xenotime and Monazite from the Spar Lake Red Bed-Associated Cu-Ag Deposit, Western Montana: Implications for Ore Genesis. Economic Geology, 107 (6) 1251-1274 doi:10.2113/econgeo.107.6.1251 | Journal (article/letter/editorial) | | thin sections from five ore and near-ore zones (chalcocite-chlorite, bornitecalcite, galena-calcite, chalcopyrite-ankerite...pyrite-calcite), but not in more distant zones across the region. Thirty-two in situ SHRIMP U-Pb analyses on xenotime...recovered from chalcocite, digenite, bornite, and minor chalcopyrite. The chalcocite, digenite, and bornite...2010; Nesheim et al., 2012). 6. Throughout the region, there may have been thermal or fluid fluxes related...includes central chalcocite + chlorite + barite + ankerite + hematite-enriched rocks (chalcocite-chlorite zone) |  | | Book | | WINDHOEK ----------- MP mineral perspectives NAMIBIA This current report has been prepared by the Bureau...provide the latest available data and information on Namibia. Comments, revisions, and additional information... Thispublication hasbeencataloged asfollows: Namibia (Mineral pcrspecri vcs) Bibliography: p. 47-55...of Docs. no.: I 28.37/2: 1. Mineral indusrrics-Namibia. I. Coakley, George J. iI ! I l I I TN19... 45 47 Appendix.--Mineral 56 producers of Namibia•••••••••••••••••••••••••••••••••••••••• ILLUSTRATIONS |  | | Book | | (mantovani@usp.br) R.McG. Miller PO Box 11222, Windhoek, Namibia (rmmiller@mweb.com.na) A. Misi Centro de Pesquisa...2004 in São Paulo (Brazil), 2005 in Windhoek (Namibia), 2006 in Punta del Este (Uruguay), 2007 in Stellenbosch...and Numees (Frimmel et al., 2002) formations of Namibia and the Jacadigo Group and Puga Formation of the...thermally subsiding basins, such as in northern Namibia, South Australia and northwestern Canada. The so-called...problematic fossil Otavia in middle Cryogenian rocks in Namibia as a sponge (Brain et al., 2001, 2003, 2008) and |  | | Book | | systematically present the geology of each country, region and continent on Earth. Each book aims to provide...(Gariep Belt) cropping out in the western borders of Namibia and South Africa. They were split up in the Mesozoic...concerning the tectonic and geodynamic evolution of this region during the Precambrian. Major tectonometamorphic...tectonostratigraphic domains and structures of the region are presented, together with implications for the... They emphasize the enormous potential of this region in terms of base (Cu, Pb, Zn, Co, Ni), precious |  | | Book | | Africa 194 3.5.2. The Damaraland alkaline province, Namibia 198 3.5.3. Carbonatites 199 3.5.4. Kimberlites...metamorphism in the Central Zone ofthe Damara Orogen, Namibia 6.3.2. Anorogenic metamorphism in the eastern Pyrenees...that metals, oxides and silicate dominated in the region between Mercury and the asteroid belt. Details...crystallographic axes will aceeierate in the given region, thereby providing another way of mapping out hot...other of the above cases dominating in a given region. More recently, measurements of crustal Poisson's |  | | Conference Proceedings (Volume) | | potential map of the Neoproterozoic Gariep Belt in Namibia .......................... 480 . . ...........pyritic Zn-Pb-Cu-(Au-Ag) sulphide deposit, Bergslagen region, south-central Sweden . . .......................Jingwen Mao & Bernd Lehmann The Omitiomire deposit, Namibia: late tectonic copper emplacement in a Neoproterozoic...shales: new data from Mo-Ni-PGE black shales (Zunyi region, Guizhou province, south China) ................Consequently, both of these methods are dependent on the region being investigated having some degree of exploration |  | | Book | | Copperbelt based on work in Zambia, DRC, Botswana, and Namibia. 2005: Recommended low sulfidation Au-Ag vein...prime examples. However, particularly in the former region, exploration over the past decade or so has outlined...factors. Nonetheless, the hypogene bornite- and chalcocite-bearing parts of the zoned deposits, especially...et al., 2010; Schuh et al., 2012). Supergene chalcocite enrichment, suggested by some (e.g., Hitzman...high grades at Olympic Dam where bornite and chalcocite are widespread (Reeve et al., 1990; Ehrig et |  | | Book | | papers and 19 geological maps in Western Australia, Namibia and Greenland. Throughout his career, which has...4.3.9 The Brandberg West Greisen Vein Systems, Namibia . . 4.3.10 The Kalguta Mo-W-Be-Bi Greisen System.... . . . . . . . . . . . . . . 6.5.1 Navachab, Namibia. . . . . . . . . . . . . . . . . . . . . . . ....Cu Deposits of the Matchless Amphibolite Belt, Namibia . . . . . . . . . . . . . . . . . . . . . . . 7...Pb-Zn-Cu-Ag-V Deposits of the Otavi Mountain Land, Namibia . . . . . . . . . . . . . . . . . . . . . . . |  | | Book | | this system (Fig. 24) shows a vanishingly small region of stability for siderite, indicating that the...these, I have added data from the Lake Superior region and the Labrador Trough (Fig. 2-7). An earlier...unconformity except in the Hamersley. In the Lake Superior region and the Labrador Trough, a thick dolomite section...formation of the deposits of the Lake Superior region and the Labrador Trough (2.0 to 1.7 b.y.). 10 fact...the chalcocite-like phases, anilite and djurleite are optically indistinguishable from chalcocite; careful |  | | Book | | overlies these older successions throughout the region, though not at Ranger One. The Number Three Orebody...kilometers north of the Hornby Bay sandstone basin in a region underlain by rocks younger than, and overlying...Exploration geochemistry evaluation study in a region of continuous permafrost, Northwest Territories...within the zone of continuous permafrost: Coppermine Region, Northwest Territories. Geol. Surv. Can., Pap....to 4100 Mg/1. These data confirm the use in this region of NMg as a hydrogeochemical indicator of uranium |  | | Book | | Copper-Nickel Deposits of the Noril'sk-Talnakh Region, USSR ........... . 7.5.2 Discussion ................ 365 9.7.1 The Rossing Uranium Deposit, Namibia. . .. 9.7.2 Discussion and Suggestions for Exploration...supergene profiles, some containing poorly developed chalcocite blankets. Sillitoe and Gappe (1984) consider...skarn production. These and similar skarns in the region are distal in type and occur from 1-2 km from mapped...ofthe Yerington batholith. Proximal skarns in the region differ in having lower total sulfide (5% or less) |
|
