 | Gutzmmer, J., Beukes, N. J., Kleyenstuber, A. S. E., Burger, A. M. (1995) Magnetic hausmannite from hydrothermally altered manganese ore in the Palaeoproterozoic Kalahari manganese deposit, Transvaal Supergroup, South Africa. Mineralogical Magazine, 59 (397) 703-716 doi:10.1180/minmag.1995.059.397.12 | Journal (article/letter/editorial) | | Kalahari manganese deposit, Transvaal Supergroup, South Africa J. GUTZMER,N. J. BEUK~S Department of Geology...University, P.O.Box 524, Auckland Park 2006, South Africa A. S. E. KLEYENSTUBERANDA. M. BURGER MINTEK...MINTEK, Private Bag X3015, Randburg 2125, South Africa Abstract Hausmannite (Mn304), a manganese oxide with...ores of the giant Kalahari manganese deposit in South Africa. EDS-electron microprobe analyses indicate magnetic...composition, containing only a few minute inclusions of hematite. Magnetic blocking temperatures of the iron-rich |  | | Journal (article/letter/editorial) | | Mineralization in the Kalahari Manganese Field, South Africa D. A. D. EVANS,† Tectonics Special Research...University, Auckland Park 2006, Johannesburg, South Africa AND J. L. KIRSCHVINK Division of Geological...enrichment in the Kalahari manganese field, South Africa, in order to assess mineralogical aspects of...remanence direction (MAM-1), associated with “dusty” hematite inclusions (1–10 µm) that are omnipresent in the...the microcrystalline matrix of low-grade, Mamatwan-type ore, yields a tilt-corrected paleomagnetic pole |  | | Journal (article/letter/editorial) | | Deposit—Kalahari Manganese Ore Field (Northern Cape, South Africa): Geochemistry of Isotopes (δ13C and...Abstract—Study of carbonate inclusions in the Mamatwantype oxide ores (braunite lutites) made it possible...1134/S0024490212030054 The Northern Cape manganese ore province (South Africa) is confined to the Kalahari...altered manganese (braunite) lutites taken from the Mamatwan deposit, the present paper attempts to describe...Manganese ores of the Kalahari Desert (Northern Cape province, South Africa) are confined to rocks of the Hotazel |  | | Journal (article/letter/editorial) | | todorokite from the Kalahari manganese field, South Africa J. Gutzmer and Nicolas J. Beukes Department...University, P.O. Box 524, Auckland Park 2006, South Africa e-mail: jg@na.rau.ac.za; njb@na.rau.ac.xa ABSTRACT...braunite-kutnahorite lutite at the Smartt Mine in the Kalahari manganese field, South Africa. Geological evidence and...place during Tertiary uplift and tilting of the South African Subcontinent. Careful chemical studies of... with fibre lengths up to 10cm, occur at Smartt mine in the Kalahari manganese field. The occurrence |  | | Journal (article/letter/editorial) | | Enrichment in the Kalahari Manganese Field, South Africa: A new discrimination scheme for Kalahari manganese...Department of Geology, University of Johannesburg, South Africa University College Dublin (UCD), School of Earth...Keywords: Arsenic Fluorapatite Kalahari Manganese Mamatwan Mukulu Hydrothermal Supergene Unconformity Wessels...thrust fault in the Kalahari Manganese Field, South Africa has undergone three significant alterations events...low-grade, diagenetic Mamatwan-type manganese ore from Mamatwan mine in the south of the Kalahari Manganese |  | | Journal (article/letter/editorial) | | manganese ore in the Kalahari manganese ®eld, South Africa Received: 28 May 1996 / Accepted: 22 January...alteration of low-grade sedimentary braunite-rich Mamatwan-type ore along a series of normal faults in the...University, PO Box 524, Auckland Park 2006, South Africa e-mail: JG@RAU3. RAU.AC.ZA Fax: 0027-11-489-2309...the west. In addition gradations of low-grade Mamatwan-type ore to high-grade Wessels-type ore along...normal faults that low-grade primary sedimentary Mamatwan-type ore has been upgraded by metasomatic alteration |  | | Journal (article/letter/editorial) | | metamorphic)Mamatwan-type ores,consisting mainlyofbraunite,hausmannite, jacobsite,hematite,kutnohorite...oresconsistingof brauniteII, bixbyite,hausmannite,hematite,calcite, and andraditewith traceamountsof braunite...definedby the assemblage hausmannite-jacobsite-hematite to that definedby the assemblage bixbyite-hausmannite...high-grade Wessels-type ore thanin theIgw-grade Mamatwan-type ore,themaximum as•o2in thesolutions couldbe...ProterozoicTransvaalSupergroup in the northern Cape Province, South Africa (Fig. 1A),mostprobablyrepresents |  | | Journal (article/letter/editorial) | | altered Wesselstype ore (derived from precursor Mamatwan-type ore) (Fig. 1B). These two ore types display...hydrothermal alteration of primary sedimentary Mamatwan-type ore to high-grade Wessels-type ore took place...the faults, into unaltered primary sedimentary Mamatwan-type ore (Fig. 1A). The faults displace overlying...characterized by preservation of sedimentary Mamatwan-type ore versus areas dominated by hydrothermally...which they present an REE profile may represent Mamatwan-type ore. However, gypsum and barite referred |  | | Journal (issue) | | affiliated with the Friends of Mineralogy publisher John S. White Division of Mineralogy The Smithsonian...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)...Cureton, David Wilber, Miguel Romero, Richard Webster, John Barlow and Rustam Kothavala made cash donations |  | | Journal (article/letter/editorial) | | Department of Geology, University of Johannesburg, South Africa e-mail: nickvafeas@gmail.com; ljolly@uj.ac.za;...Meffre@utas.edu.au © 2018 June Geological Society of South Africa. Abstract The manganese ore of the Hotazel...horizons, bounded above and below by thin beds of hematite lutite, all of which are interbedded with Superior-type...low-grade manganese ore, commonly referred to as “Mamatwan-type” ore, has been affected by hydrothermal and/or...geologically recent supergene alteration). The Mamatwan-type ore is a low-grade, diagenetic ore-type comprising |  | | Journal (issue) | | 85741 Editor & Publisher Wendell E. Wilson Founder John Sampson White Associate Editors Pierre Bariand Sorbonne...Zeolites and associated minerals from the Palabora mine, Transvaal........................................& R. S. W. Braithwaite The Lake George antimony mine, New Brunswick ..................... 263 by W. E...Kalahari m an g an ese field, C ape Province, South Africa. (See th e article in this issue, b eg in n...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 |  | 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) | | Hotazel Iron Formation, Kalahari Manganese Field, South Africa HARILAOS TSIKOS,†,* NICOLAS J. BEUKES, Geology...2006, South Africa JOHN M. MOORE, Geology Department, Rhodes University, Grahamstown 6140, South Africa...Geological Sciences, University of Cape Town, Rondenbosch 7700, South Africa Abstract The Kalahari manganese...manganese field in the Northern Cape province, South Africa, is a world-class manganese resource (ca. 8 billion...two areas of the Kalahari manganese field, in the south and in the north of the field, which respectively |  | | Journal (article/letter/editorial) | | exposed along the walls of the Mamatwan Mine, Northern Cape, South Africa, reveals three main depositional...exposed section (55 m) of the Kalahari Group at Mamatwan Mine was analysed for its mineralogy, elemental composition...These sub-basins stretch over 2200 km in a north-south direction, and for the (Figure 1). CE purposes...Nossob-Molopo sub-basin that is bounded to the south by the Etosha–Griqualand–Transvaal (E-G-T) axis...Boundary positions and their interactions with the South Atlantic air masses and the northeast monsoon penetrating |  | | Journal (article/letter/editorial) | | University RO. Box 524 AucWand Park, 2006 Gauteng, South Africa . . .*.’. Corresponding author: bc @na.rau...just south of the great Kalahari Desert on the vast plains of the Northern Cape Province of South Africa...the world’s finest specimens of rhodochrosite, hematite, hausmannite. sturmanite. and other species. ...of the Transvaal Supergroup rocks (black) in South Africa. B: Enlarged portion of Griqualand West showing...and one of the few economic centers of the Northern Cape Province. Kuruman is also the preferred home |  | | Journal (article/letter/editorial) | | minerals(Hew- portant contributionshave been made by John de ett and Fleischer,1960), and the GriqualandWest...0861-0128/88/192/1108-1152.50 Mn DEPOSITS, SOUTH AFRICA 1109 Geologic Framework .• •:•:•:•:•:•:•:•:•:•...Stellenbosch). 1110 j. E. DE VILLIERS proximatelynorth-south,and regionalshearingand (includingmetamorphic deposits)...Morocco,for instance,hausmanniteand janekke,70 km south-southwest of Postmasburg. It was cobsiteoccurin...suitsshowin a generalway which mineralsmay be in the Mamatwan area it is located in the Vo61water formedat low |  | | Journal (article/letter/editorial) | | Department of Geology, University of Johannesburg, South Africa University College Dublin (UCD) School of Earth...Department of Geology, University of Johannesburg, South Africa e-mail: ljolly@uj.ac.za; fanusv@uj.ac.za P....University of Cape Town, South Africa e-mail: petrus.leroux@uct.ac.za © 2019 Geological Society of South Africa...Field, these are the lowgrade, high-carbonate Mamatwan-type ore or “Diagenetic ore”; and the high-grade...precipitate, having only undergone diagenesis SOUTH AFRICAN JOURNAL OF GEOLOGY 2019 • VOLUME 122.2 PAGE |  | | Journal (article/letter/editorial) | | Johannesburg, SouthAfrica Abstract Low-grade Mamatwan-type sedimentary manganese orehasbeenupgraded...forthehydrothermal fluids themanganese orewasreplaced by hematite. Someof themanganese wasreprecipitated to formveryhigh...smallhill near Hotazel, at what is now the Black Rock mine orearepoorlyunderstood. In addition, theeffectofferrugini-...high-grade ore.A petrographic-geochemimation• hematite lutite• braunitc lutitesedimentary cycles ca]studywasundertaken...manganesemum known thickness of about 45 m at the Mamatwan mine ore (Gutzmer, 1993; Gutzmer and Beukes,1993) |  | | Journal (issue) | | mines, Kalahari Manganese Field, Northern Cape Province, South Africa ..................................crystals on matrix, 17.2 cm, from the N’Chwaning I mine, collected in 1978. Private collection and photographer...(2015–2016) Scott A. Rudolph Paradise Woods (2008–2016) John Dabney (2015–2016) Daniel J. Record Irv Brown (2009–2015)...(2016–2017) Eric D. Long Barry M. & Beth Kitt (2011–2016) John Schneider (2016) Dylan Stolowitz Steve Maslansky...com APATITE Nagar, Hunza Valley, Gilgit District, Northern Areas, Pakistan, 11.5cm. Fine Minerals International |  | Grobbelaar, W. S., Burger, M. A., Pretorius, A. I., Marais, W., van Niekerk, I. J. M. (1995) Stratigraphic and structural setting of the Griqualand West and the Olifantshoek Sequences at Black Rock, Beeshoek and Rooinekke Mines, Griqualand West, South Africa. Mineralium Deposita, 30 (2) 152-161 doi:10.1007/bf00189344 | Journal (article/letter/editorial) | | Beeshoek and Rooinekke Mines, Griqualand West, South Africa W.S. Grobbelaar, M.A. Burger, A.I. Pretorius...Manganese Mines of South Africa Limited, PO, Mancorp Mine, 8423, Beeshoek, South Africa Received: 13 May...200 km between R o o i n e k k e Mine in the south and Black Rock Mine in the north, in G r i q u a l a...distribution of geological features to the n o r t h and south of the M a r e m a n e D o m e structure, located...unconformity separates the Campbellrand Subgroup from the local variety of the Asbestos Hills Subgroup. Prior to |  | | Journal (article/letter/editorial) | | COMMUNICATIONS FLUID INCLUSION STUDIES IN COGENETIC HEMATITE, HAUSMANNITE, AND GANGUE MINERALS FROM HIGH-GRADE...MANGANESE ORES IN THE KALAHARI MANGANESE FIELD, SOUTH AFRICA VOLKERLODERS? GeoForschungsZentmm Potsdam...Park,SouthAfrica Abstract Fluidinclusions in hematite andhausmannite fromhigh-grade Wessels-type orefromtheKalahari...thesemanganese-rich metrical Superior-type iron formation-hematite lutite-brauposedmetasomatic originof the high-grade...m at Mamatwan mine and 4 to 8 m at appropriate to be fluidinclusion hostminerals.Someof the mine(Fig.1) |  | | Journal (article/letter/editorial) | | Figure 1. Location map showing the Wessels mine in South Africa, prepared by William Besse. BRUCE CAIRNCROSS...Johannesburg, South Africa brucec@uj.ac.za Wesselsite Wessels Mine Kalahari Manganese Field South Africa Figure...Figure 2. The Wessels mine in the middle distance, as seen looking east from Black Rock hill. Part of Black...Black Rock mine village is in the foreground. Bruce Cairncross photo, November 2011. 282 ROCKS & MINERALS...discovery. The specimen was obtained from the late John Veevaert who had the material quantitatively identified |  | | Journal (article/letter/editorial) | | comprising laminae of chert,ironoxides (magnetite, hematite), ironsilicates (greenalite, minnesotaitc, stilpnomelane...Rock Mi• wessels Mine KMF •""-.•"'"•:':'•:•?J iii•'i!i/:?"• ning Mine •lGIoria Mine j Highde Hydrothermally...Devon•d /• Lungdon •Hotazel Mine '•:•_adr;•) ••,.• e-3' •7 Annex Mine e • cover Sequences "• ,... O 5 10 I I I I • Smartt Mine Mi•e ......• _•Mamatwan Mine Kilometres Kilometres I Fig.1...tionwasattainedby meansof X-raydiffraction (XRD) and ent mine site, however, this thicknessrelation is reversed |  | | 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 |  | Pack, A., Gutzmer, J., Beukes, N. J., van Niekerk, H. S., Hoernes, S. (2000) Supergene Ferromanganese Wad Deposits Derived from Permian Karoo Strata along the Late Cretaceous-Mid-Tertiary African Land Surface, Ryedale, South Africa. Economic Geology, 95 (1) 203-220 doi:10.2113/gsecongeo.95.1.203 | Journal (article/letter/editorial) | | Cretaceous–Mid-Tertiary African Land Surface, Ryedale, South Africa A. PACK,†,* J. GUTZMER, N. J. BEUKES, H. S....University, P.O. Box 524, Auckland Park 2006, South Africa AND S. HOERNES Mineralogisch-Petrologisches...Ryedale mine situated 110 km west of Johannesburg in the northwestern province of South Africa. The wad...hosted by Karoo strata, namely the one at Ryedale mine situated 110 km west of Johannesburg (Fig. 1). Similar...The ferromanganese wad produced from the Ryedale mine is specifically supplied to gold mines of the Witwatersrand |  | | Journal (article/letter/editorial) | | press). Among the simple oxides, only anatase and hematite have been found to date. Bluish-black, millimeter-sized...forms tabular crystals with dominant pinacoids. Hematite is abundant as sharp, tabular crystals up to 2...Afrikaans Universi& RO.Box 524, Auckland Park, 2006, South Africa. Klein Spitzkoppe topaz was first described...collector market and gem trade have been excavated by local Damara diggers. A granite quarry used to encounter...plagioclase. and microcline, with accessory magnetite, hematite, and limonite (Cairncross, Campbell, and Huizenga |
|
