 | Tsikos, H., Beukes, N. J., Moore, J. M., Harris, C. (2003) Deposition, Diagenesis, and Secondary Enrichment of Metals inthe Paleoproterozoic Hotazel Iron Formation, Kalahari Manganese Field, SouthAfrica. Economic Geology, 98 (7) 1449-1462 doi:10.2113/gsecongeo.98.7.1449 | Journal (article/letter/editorial) | | Paleoproterozoic Hotazel Iron Formation, Kalahari Manganese Field, South Africa HARILAOS TSIKOS,ā ,* NICOLAS J....2006, South Africa JOHN M. MOORE, Geology Department, Rhodes University, Grahamstown 6140, South Africa...University of Cape Town, Rondenbosch 7700, South Africa Abstract The Kalahari manganese field in the Northern...Northern Cape province, South Africa, is a world-class manganese resource (ca. 8 billion tons at 20ā48%...mining of manganese is concentrated in two areas of the Kalahari manganese field, in the south and in the |  | Fairey, Brenton, Tsikos, Harilaos, Corfu, Fernando, Polteau, StĆ©phane (2013) UāPb systematics in carbonates of the Postmasburg Group, Transvaal Supergroup, South Africa: Primary versus metasomatic controls. Precambrian Research, 231. 194-205 doi:10.1016/j.precamres.2013.03.010 | Journal (article/letter/editorial) | | the Postmasburg Group, Transvaal Supergroup, South Africa: Primary versus metasomatic controls Brenton...Rhodes University, PO Box 94, Grahamstown 6140, South Africa Department of Geosciences, University of Oslo...Supergroup, which covers the Kaapvaal craton in South Africa, has played a central role due to its good stratigraphic...particular problem for the Postmasburg Group in the Northern Cape Province, where there remain fundamental disagreements...sequence overlying banded iron-formation (BIF) and manganese ore of the Hotazel Formation in the uppermost |  | Lantink, Margriet L., Oonk, Paul B.H., Floor, Geerke H., Tsikos, Harilaos, Mason, Paul R.D. (2018) Fe isotopes of a 2.4āÆGa hematite-rich IF constrain marine redox conditions around the GOE. Precambrian Research, 305. 218-235 doi:10.1016/j.precamres.2017.12.025 | Journal (article/letter/editorial) | | University, Drosty Road, Grahamstown, 6139, South Africa; H.Tsikos@ru.ac.za 3 GFZ German Research Centre...hematite- and manganese-rich Hotazel iron formation, Griqualand West basin, South Africa, was deposited...fractionation. Recent Fe (and Mo) isotope studies on South African IFs have provided strong clues for the existence...Ongeluk volcanics from the Transvaal basin, South Africa (Gumsley et al., 2017) places the stratigraphically...(294-291 m) from the Kalahari Manganese Field, Northern Cape Province, South Africa (Figure 1a). A half-core |  | | Journal (article/letter/editorial) | | the Transvaal Supergroup in Griqualand West, South Africa E. A. Schneiderhan Paleoproterozoic Mineralization...University of Johannesburg, Auckland Park 2006, South Africa e-mail: easc@rau.ac.za J. Gutzmer Paleoproterozoic...University of Johannesburg, Auckland Park 2006, South Africa e-mail: jg@na.rau.ac.za H. Strauss Geologi...Park 2006, South Africa e-mail: njb@na.rau.ac.za Ā© 2006 March Geological Society of South Africa ABSTRACT...Paleoproterozoic VoĆ«lwater Subgroup in Griqualand West, South Africa, is an exceptionally well preserved succession |  | | Journal (article/letter/editorial) | | development of the Sishen South (Welgevonden) iron ore deposit, South Africa, as deduced from ground gravity...Palaeoproterozoic Transvaal Supergroup in the northern Cape Province of South Africa hosts high grade (.60%Fe) hematitic...hematitic and specularitic iron and manganese mineralisation. The mineralisation is primarily exposed along...structure known as the Maremane dome. The bulk of South Africaās iron ore production is currently provided...Resources megaton Sishen iron ore mine on the northern end of the dome, and the smaller Assmang Beeshoek |  | KUNZMANN, M., GUTZMER, J., BEUKES, N. J., HALVERSON, G. P. (2014) DEPOSITIONAL ENVIRONMENT AND LITHOSTRATIGRAPHY OF THE PALEOPROTEROZOIC MOOIDRAAI FORMATION, KALAHARI MANGANESE FIELD, SOUTH AFRICA. South African Journal of Geology, 117 (2) 173-192 doi:10.2113/gssajg.117.2.173 | Journal (article/letter/editorial) | | PALEOPROTEROZOIC MOOIDRAAI FORMATION, KALAHARI MANGANESE FIELD, SOUTH AFRICA M. KUNZMANN Department of Mineralogy...Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa email: j.gutzmer@hzdr.de N.J. BEUKES Paleoproterozoic...Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa e-mail: nbeukes@uj.ac.za G.P. HALVERSON Department...halverson@mcgill.ca Ā© 2014 December Geological Society of South Africa ABSTRACT The Paleoproterozoic Mooidraai Formation...Mn-bearing Hotazel Formation in the Kalahari Manganese Field, South Africa. Although it occupies an important |  | | Journal (article/letter/editorial) | | influenced by the presence of O2. BIF, sedimentary manganese, and phosphorites disappeared ca. 1.8 Ga, but...Paleoproterozoic. BIF returned, as did sedimentary manganese deposits and phosphorites. A further rise in the...iron formations in Australia, South Africa, Asia, and North and South America. The source of some of...et al., 1999) in the Transvaal Supergroup of South Africa (Beukes, 1978, 1983; Beukes and Klein, 1990)...Witwatersrand basin in South Africa and the uranium ores of the Elliot Lake district in Canada is still being |  | | Report (issue) | | SURVEY OF SOUTH AFRICA COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA MINERALOGY OF SOUTH AFRICA:... COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA Scientific Editor R.D. Dixon Linguistic and...Council for Geoscience (Geological Survey of South Africa), 280 Pretoria Street, Silverton, Pretoria or........................... 69 5.1 Overview of South African Occurrences ..............................LAYEREDSUITE,BUSHVELDCOMPLEX.... 111 MINERALOGY OF SOUTH AFRICA: TYPE-MINERAL SPECIES AND TYPE-MINERAL NAMES |  | | Journal (article/letter/editorial) | | analyses show very minor amounts of aluminum, iron, manganese, and/or magnesium. Pseudomorphs of datolite after...found at the Wesselās mine, Hotazel, Cape Province, South Africa. Rob Lavinsky photo. Figure 5 (left)...the Faraday mine and is likely from that location. John Betts photo. the Upper Peninsula and has been chronicled...1.4 cm with white heulandite on calcite and stilpnomelane. The specimen is but one of a large number originating...Prospect Park quarry, Passaic County, New Jersey. John Betts photo. Figure 10 (right). An unusual 6-cm |  | | Journal (issue) | | 85741 Editor & Publisher Wendell E. Wilson Founder John Sampson White Associate Editors Pierre Bariand Sorbonne.................. 273 by H. Yeates The Kalahari manganese field: an update .............................'C h w an in g m ine, Kalahari m an g an ese field, C ape Province, South Africa. (See th e article in...d e r n M in e r a l C o l l e c t io n CURATION John Sampson White Department of Mineral Sciences Smithsonian...talks at shows and club meetings, conducting of field trips, behindthe-scenes tours, more exposure through |  | | Journal (issue) | | affiliated with the Friends of Mineralogy publisher John S. White Division of Mineralogy The Smithsonian...feature articles Famous Mineral Localities: The Kalahari Manganese F ie ld ...................................Arthur Roe Famous Mineral Localities: The Brumado District, Bahia, Brazil..................................Thomssen, Walt Risch, Star Northam, Carolyn Wilson, John Muntyan and Wayne DeBrusk assisted with record keeping...Brazil) Pierre and Nellie Bariand (Paris, France) F. John Barlow (Appleton, WI) Ron Bentley (Windsor, CT) |  | | Journal (article/letter/editorial) | | Western Australia and the Transvaal basin of South Africa. Major iron formations disappeared from the...and banded iron formations of the Lake Superior district and Labrador in North America and the coeval Frere...dolomite, calcite), and silicates (greenalite, stilpnomelane, minnesotaite, riebeckite) as well as chert...Griquatown Formations of the Transvaal Supergroup, South Africa (Johnson et al., 2018; Rasmussen et al., 2015b...using TESCAN VEGA 3 (LaB6 source) and FEI Verios (field-emission source with better resolution than LaB6 |  | | Journal (article/letter/editorial) | | 960-1004 Precambrian Iron-Formations of Southern Africa N.J. BEUKES Abstract From existing information...chemical association(shelf-carbonateand carbonate-manganese associations)is predominantlyyoungerthan 2,300m...1966) and Ierru#inous SOUTHERN Africa is definedas that part of Africa sedimentary rockslessthan 15 percentiron...percentiron. In this southof approximately16Ćø south-latitude and in- paper,the 15 percentboundaryis not...contentbecauseof a generallack of chemicalanalyses. South West Africa, and Mozambique. This rela(2) Iron-formationis |  | | Journal (article/letter/editorial) | | of the Griqualand West Sequence, Northern Cape Province, South Africa, in comparison with other Precambrian...Universityof Stellenbosch, 7600 Stellenbosch, South Africa Received 30 August 1993;revised versionaccepted...Asbestos Hills Subgroup (Transvaal Supergroup, South Africa) have been sampled. 142 major and trace element...V and < 10 to 177 ppm B a. The intercalated stilpnomelane lutites have a very similar gross composition...Geological Survey, Private Bag X112, 000l Pretoria, South Africa. 0301-9268/95/$09.50 Ā© 1995 ElsevierScienceB |  | | Journal (article/letter/editorial) | | constrain biogeochemical redox cycling of iron and manganese in a Palaeoproterozoic stratiļ¬ed basin Harilaos...Erel b, John M. Moore a a b Geology Department, Rhodes University, Grahamstown 6140, South Africa Institute...isotopes banded iron-formation manganese Palaeoproterozoic South Africa a b s t r a c t The Hotazel Formation...NeoarchaeanāPalaeoproterozoic Transvaal Supergroup of southern Africa is an unusual sedimentary sequence of banded iron-formation...iron-formation (BIF) intercalated with three manganese-rich layers. As such, it is a succession that holds |  | | Journal (article/letter/editorial) | | University, Artillery Road, Grahamstown, 6140, South Africa c Department of Physics and Earth Sciences...Hills IFs from the Griqualand-West Basin in South Africa. These rocks were deposited immediately before...minerals including greenalite, minnesotaite and stilpnomelane may have tracked seawater REE variability. The...Asbestos Hills IFs of the Transvaal Supergroup in South Africa were deposited immediately before the GOE around...Fe-silicates (greenalite, minnesotaite, riebeckite and stilpnomelane) plus chert (Oonk et al., 2017). We assess and |  | | Journal (article/letter/editorial) | | Palaeoproterozoic Kuruman Iron Formation, Northern Cape Province, South Africa: evidence for simultaneous BIF deposition...February 2002; accepted 28 March 2003 Abstract Stilpnomelane-rich tuffaceous mudrocks are an important component...Kuruman and Griquatown Iron Formations in the Northern Cape Province. They document volcanic activity during...Banded iron formation; Kuruman Iron Formation; Stilpnomelane mudrocks in BIF; Palaeoproterozoic correlation...Kuruman Iron Formation, Transvaal Supergroup (South Africa) (Figs. 1 and 2) and the Brockman Iron Formation |  | | Book | | Mountain, Alabama (by H. Harwood) 5:241-244 Iron-manganese phosphates of the Williams pegmatites, Coosa County...ANHAEUSSER. CARL R. --with B. Caimcross: Gold in South Africa 23:209-225. 23:228 Al 'JAJ\ABO~OINA The Anjanabonoina...California (by G. H. H. Muehle) 2:171-173 A.,rrno:-.-Y, JOHN w. The Mineral Museum of the University of Arizona...'\llMO~-Y PEAK Antimony Peak [California]: a rerun of a field trip I JO years later (by H. E. Pembenon) 3:78-8...Eq11ilibria in rite Earth; Moon Rocks and Minerals; Field Ion Microscopy; Crystals and X-rays; Co/or and Symmetry |  | | Book | | No. 7 ) ; and āGenesis of Precambrian Iron and Manganese Depositsā, published by UNESCO (Earth Sciences...of Canada, and of the Transvaal Supergroup of South Africa, are syntheses considerably superior t o any...University, Auckland Park, PO 524, Johannesburg 2000, South Africa. J.A. BUNTING Exploration Department, BHP...Australia. E.C. PERRY, J R . Department of Geology, Northern Illinois University, De Kalb, Illinois 60115,...DEPOSITIONAL BASIN O F THE TRANSVAAL SUPERGROUP. SOUTH AFRICA N.J. Beukes Introduction . . . . . . . . . |  | | Journal (article/letter/editorial) | | west through magnetite-ankerite and magnetite-stilpnomelane assemblages in the transition zone to magnetite...central part, and (4) XuchangWuyang-Huoqiu in the south (Zhai and Santosh, 2013). BIFs within these metallogenic...regard, we present the first comprehensive set of field and petrologic data, together with detailed geochemical...affected the Yuanjiacun BIF. In general, it plunges south and is part of an inclined structure with dips to...whereas the upper limb has been eroded. Strata in the south are situated in the upper limb of the folds, whereas |  | Cairncross, Bruce, Windisch, Wolfgang, Smit, Henk, Fraser, Allan, Gutzmer, Jens (2008) The Vergenoeg: Gauteng Province, South Africa Fluorite Mine. Rocks & Minerals, 83 (5) 410-421 doi:10.3200/rmin.83.5.410-421 | Journal (article/letter/editorial) | | August 2013 V E RG E N O E G GAUTENG PROVINCE, SOUTH AFRICA T FLUORITE MINE he Vergenoeg fluorite mine...mine is located in the Gauteng Province of South Africa, approximately 80 kilometers northeast of Pretoria...approximately 140 kilometers northeast of Johannesburg, South Africa. Access to the mine is easy via a paved road...Johannesburg, South Africa; brucec@uj.ac.za 2 932 Crots Street, Rietfontein, 0084, Pretoria, South Africa 3 PO...Pretoria, South Africa; smithj3@telkom.co.za 4 PO Box 369, Fourways, 2055, Gauteng, South Africa; mineralman@telkomsa |  | Bekker, A., Slack, J. F., Planavsky, N., Krapez, B., Hofmann, A., Konhauser, K. O., Rouxel, O. J. (2010) Iron Formation: The Sedimentary Product of a Complex Interplay among Mantle, Tectonic, Oceanic, and Biospheric Processes. Economic Geology, 105 (3) 467-508 doi:10.2113/gsecongeo.105.3.467 | Journal (article/letter/editorial) | | Oceanic, and Biospheric Processes * ANDREY BEKKER,1,ā JOHN F. SLACK,2 NOAH PLANAVSKY,3 BRYAN KRAPEŽ,4 AXEL...Sciences, University of KwaZulu-Natal, Durban 4041, South Africa of Earth and Atmospheric Sciences, University...the deposition of giant Superior-type BIF in South Africa, Australia, Brazil, Russia, and Ukraine. The...proximally, generally as oxides or sulfides. Manganese, in contrast, was more mobile. We conclude that...deposits that, in places, also contain economic manganese concentrations (Klein and Beukes, 1992). Phanerozoic |  | | Journal (volume) | | Banded Iron Formation-Hosted Hematite Ore Deposits John G. McLellan and Nicholas H. S. Oliver 185 Part...Warren Thorne, Steffen Hagemann, Adam Webb, and John Clout v 197 Chapter 9: The Itabirites of the...Approach to the Sishen South Iron Ore Deposit, Northern Cape Province, South Africa, and Its Implication...Deposit, Simandou Range, Republic of Guinea, West Africa I. L. Cope, J. J. Wilkinson, A. J. Boyce, J. B...ore exploration project in the Northern Cape province of South Africa. He completed his B.Sc. (Hons) |  | | Journal (article/letter/editorial) | | Iskopaemye, 2009, No. 2, pp. 169ā192. Association of Manganese Ore and Phosphorite-Bearing Facies in Sedimentary...the distribution of sedimentary phosphorite and manganese deposits in the Lower Paleozoic and Proterozoic...attention is paid to co-occurrence of phosphate and manganese ores formed during the VendianāCambrian shale...biospheric events appears to be masked. Association of manganese and phosphorus ore occurrences and deposits with...(Karatau, Khubsugul, and South China basins), Australia (Georgina basin), Africa Fig. 1. Geological structure |  | | Book | | Malcolm Annis, and Dave Strong. For help with field work I thank A. Hallam, R. Hiscott, J. Hudson, R...Sequence Theories of Origin Summary 89 Chapter 5. Manganese Mineralogy Geochemistry Petrography Vertical Sequence...Morocco Deposits associated with iron-formations Manganese in Modem Sediments Mn nodules in modem sediments...deposited. Sedimentary examples are iron and manganese ores, volcanic examples are the Kuroko-type Cu-Pb-Zn...Hamersley Basin of Australia, the Transvaal of South Africa, and the Lake Superior and Labrador Trough regions |
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