 | Boni, M., Terracciano, R., Evans, N. J., Laukamp, C., Schneider, J., Bechstadt, T. (2007) Genesis of Vanadium Ores in the Otavi Mountainland, Namibia. Economic Geology, 102 (3) 441-469 doi:10.2113/gsecongeo.102.3.441 | Journal (article/letter/editorial) | | 441–469 Genesis of Vanadium Ores in the Otavi Mountainland, Namibia MARIA BONI,† Dipartimento di Scienze... mottramite, and vanadinite) in the Otavi Mountainland, Namibia, once were considered the greatest vanadium...surfaces in carbonate rocks of the Neoproterozoic Otavi Group, which already contained primary sulfide orebodies...surrounding primary sphalerite-willemite orebodies (Berg Aukas type). The V deposits the Otavi Mountainland...been known to exist in the northern areas of the Otavi † Corresponding author: e-mail, boni@unina.it *Present |  | Mondillo, Nicola, Wilkinson, Jamie J., Boni, Maria, Weiss, Dominik J., Mathur, Ryan (2018) A global assessment of Zn isotope fractionation in secondary Zn minerals from sulfide and non-sulfide ore deposits and model for fractionation control. Chemical Geology, 500. 182-193 doi:10.1016/j.chemgeo.2018.09.033 | Journal (article/letter/editorial) | | several Zn deposits in Ireland, Belgium, Poland, Namibia, Peru, Yemen and Zambia. The data are compared...precursor phase (primary sphalerite or an earlier secondary phase), with primary sphalerite falling in a relatively...in which partial dissolution AC of primary sphalerite is followed by precipitation of an initial secondary...isotopic data observed for 5 ACCEPTED MANUSCRIPT sphalerite in the Irish ore field is likely generated by...observed that “continuous batch leaching of M sphalerite at pH=2 and pH=4 was characterized by a modest |  | | Journal (article/letter/editorial) | | occurrences in the Otavi Mountains of South West Africa. At the Berg Aukas Mine exploratorydiamonddrilling...smithsonitehave formed by direct replacementof sphalerite,while cerussiteowesits origin to the replacementof...differentto thosenotedin the upper levelsof the Berg Aukas mine and are very similarto thosepreviouslydescribedby...the walls of the cavitiesare commonly madeup of sphalerite-galena ore now largelyoxidizedto willemite,cerussite...expectedthat slowlycirculating waters in an arid region would be in close thermal equilibrium with the |  | | Journal (article/letter/editorial) | | base metal mineralization in the Otavi Mountain Land, Northern Namibia—a review and regional interpretation...Günzel b a b University of Namibia, Private Bag 13301, Windhoek, Namibia Ongopolo Mining Ltd., Main Street...Street, P.O. Box 40, Tsumeb, Namibia Received 16 May 2004; accepted 10 April 2006 Available online 4...Sediment-hosted base metal sulfide deposits in the Otavi Mountain Land occur in most stratigraphic units...Supergroup, including the basal Nosib Group, the middle Otavi Group and the uppermost Mulden Group. Deposits like |  | | 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 |  | | Book | | berg Organ Pipes / Twyfelfontein 7 AiAiba / farm Anibib 136 8 Grosse Spitzkoppe, Erongo 9 ...North TsumebSpecial The Otavi Mountainland The Central Northern to Northwest Region including Damaraland...s Onganja Mine and Surrounding Copper Deposits The South The Pegmatitesin Central Namibia Luderitz and... Encyclopedia of the Mineralsof Namibia 443 Meteorites in Namibia Bibliography Index Photo credits...__ Republic of Namibia The President State House W°Ntdhoek FOREWORD Namibia is endowed with an |  | | Journal (article/letter/editorial) | | obvious importance of Cu as a mobile ore metal in the region. Chloride concentrations are variable, with values...rocks), direct atmospheric leaching of the run of the mine (5ROM) ore with sulphuric acid will not be economically...melting of supracrustals (Rössing alaskites, Namibia), or from extreme fractional crystallization of...surficial deposits like calcretes (Langer Heinrich, Namibia). In the Olympic Dam IOCG deposit, Southern Australia...Intergrowths of stannite and chalcopyrite in sphalerite, note the ‘chalcopyrite disease’ texture NO |  | | Book | | Productive Era of Lhe Otavi Minen- und Eisenbahn-Gesellschaft: 1906-1946 . Tsumeb Mine . Ore Concentration...at Tsumeb? Who discovered the copper ores of the Otavi Mountain Land'/ These questions led the writer,...truth is that in total metal production the Tsumeb mine has become one of the foremost on the African continent...sta tistics do, however, reveal why the Tsumeb mine has attained world status as a base metal producer...time - some indefinite day when Bushmen of the Otavi Upland showed the outcrop of green malachite to |  | | Journal (issue) | | the existen'"e of such a place as the uest Ashmore Farm. This was on July 9, two 1938. That day I was using...which I nearly fell was k>ze- that famous Ashmore Farm locality mentioned in Dana. Mr. Zodac had written... 1936, page 6). How he enquired for the Ashmore Farm. How no (our one with whom he talked had ever heard...as he stated, it was now known as the Whitestone Farm. He gave me a desrintio& cription of the place and...juMltle of rock 1/t the mineral pit, Whitestone Farm, Natural Bridie. N. Y. lALS 581 ROCKS AND MINERALS |  | | Journal (issue) | | 97 by L. F. C abri & J. H . G. Laflam m e The Otavi M ountain Land Cu-Pb-Zn-Va deposits N am ib ia....ellow stone $10 Zeolites (B razil), Rock C andy mine (B C ). M uddy creek (C O ) v.13/#4 D iam ond (CO...21/#6 N anisivik m ine (Canada). v.22/#l M asham ba mine (Zaire), $12 v.21/#5 Rose qtz. (B razil), green...24/#5 T he G eysers (CA), Sanford v.25/#l Jamestown mine gold (CA), v.25/#2 Q uasicrystals, Sterling deposit...deposit (M E), W essels m ine (So. Af.), Parker mine (Que.) $10 v.24/#6 Bisbee U pdate (AZ), A llchar |  | | 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...448 456 463 475 481 486 493 497 500 505 507 513 515 516 517 Contents Proterozoic W Skarns in the Gascoyne.... . . . . . . . . . . . . . . 6.5.1 Navachab, Namibia. . . . . . . . . . . . . . . . . . . . . . . ....Cu Deposits of the Matchless Amphibolite Belt, Namibia . . . . . . . . . . . . . . . . . . . . . . . 7 |  | | Book | | quelques uns des premiers cristaux sur roche de la Mine Premier en Afrique du Sud (sur kimberlite alteree...Une nagyagite {mine d'or arsenicale de Nagyag) s'est payee 122 livres ; une proustite {mine d'argent rouge...a 72 livres a !'exception d'un "grand plateau de mine de plomb verte de Fribourg" paye 300 livres ! Le...livres. Il est precise qu'un "superbe morceau de mine d'antimoine en aiguilles qui reflechissent les plus...savants se sont interesses a la geologie de cette region. Le fait que politiquement le Mont Blanc soit rattache |  | | Report (volume) | | the generous support of thousands of individual mine operators, distributors, and consurnors, as wdl...its fotulity rate, mainly because of a series of mine disast;ars. 'Wherens only 1 major explosion occurI'e(l...11 f1',014i9 24, f-".l,680 1,256,000 l:IB,Vll,515 5Ul!MABT Other ···--····•··············-···-· ...iron values in United States total; (2) tlw uso of mine figures for gold, silver, copper, lead, and zinc...or iron valuation, nn,! tor <11.lmr rn 1,t11 !~ mine production (recoverable content of metals) is the |
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