 | | Journal (article/letter/editorial) | | Asbestiform manjiroite and todorokite from the Kalahari manganese field, South Africa J. Gutzmer and Nicolas...University, P.O. Box 524, Auckland Park 2006, South Africa e-mail: jg@na.rau.ac.za; njb@na.rau.ac.xa ABSTRACT...ABSTRACT Asbestiform manjiroite and todorokite occur as infill of bedding parallel extension veinlets...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 |  | | 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) | | 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...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...live in the mine villages of Hotazel and Black Rock. These were established by SAMANCOR (South African Manganese |  | | 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...thrust fault in the Kalahari Manganese Field, South Africa has undergone three significant alterations events...Mamatwan-type manganese ore from Mamatwan mine in the south of the Kalahari Manganese Field as a reference...multiple geological settings. The Paleoproterozoic Hotazel Formation of the Kalahari Manganese Field hosts |  | | Journal (article/letter/editorial) | | Department of Geology, University of Johannesburg, South Africa e-mail: nickvafeas@gmail.com; ljolly@uj.ac.za;...Geological Society of South Africa. Abstract The manganese ore of the Hotazel Formation in the Kalahari...Kalahari Manganese Field is hosted within the Hotazel Formation, a chemosedimentary sequence of three...al., 1986). The Hotazel Formation is confined to five erosional relics, namely the Hotazel, the Avontuur...the Blackridge thrust fault (Van Niekerk, 2006). SOUTH AFRICAN JOURNAL OF GEOLOGY 2018 • VOLUME 121.2 PAGE |  | | Journal (article/letter/editorial) | | Wessels Mine, Northwest of Kuruman, Kalahari Manganese District Cape Province, South Africa I t was...inesite: Broken Hill mines, New South Wales, Australia; Hale Creek mine, Trinity County, California; Kalahari...Kalahari manganese district, Cape Province, South Africa; and Fengjiashan mine, Hubei Province, China...China. Of these, the Wessels mine within the Kalahari manganese district has yielded a sufficient number of...stunning rhodochrosite that came from the same district. From a Historic Perspective Because inesite was |  | | 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 |  | | Journal (article/letter/editorial) | | oxygenated environment during deposition of the Hotazel Formation, are only known from Wessels-type ore...fault-controlled hydrothermal system that affected the Hotazel Formation in the northwestern part of the K M F...that the Ongeluk lava, dircctly underlying the Hotazel Formation, was subjected to a similar epigenetic...alteration process to that which affected the Hotazel Formation. It is of interest to note that the 'Kalahari...relatively large age gap between the deposition of the Hotazel Formation, some 2200 2300 Ma ago, and the hydrothermal |  | | 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...erosional relics of the iron- and manganese-rich Hotazel Formation. A total of 19 manganese ore samples...samples from the lower manganese ore horizon of the Hotazel Formation were selected for analysis based on their |  | | Journal (article/letter/editorial) | | Deposit—Kalahari Manganese Ore Field (Northern Cape, South Africa): Geochemistry of Isotopes (δ13C and...1134/S0024490212030054 The Northern Cape manganese ore province (South Africa) is confined to the Kalahari...Kalahari Desert (Northern Cape province, South Africa) are confined to rocks of the Hotazel Formation. Together...Supergroup (Fig. 2). At ore deposits in the Northern Cape province, the Early Proterozoic section of the...the section (Cornell et al., 1996). Rocks of the Hotazel Formation at the bottom of the section are represented |  | | 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 |  | | Journal (article/letter/editorial) | | manganeseoxide minerals coronadite, romanechite,and todorokite occur in a wide range of geologic settings and...much of their tunnel water to at least 500 "C. Todorokite gradually loses most of its tunnel water below...The lower-temperatureevolution of water from todorokite as compared with romanechite and coronadite is...larger, less-filled tunnels in todorokite. Romanechite and todorokite (and perhaps coronadite) appear...structural effectsof heating romanechite and todorokite up to 300 'C are limited to a minor changein |  | | 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...Wesselsand Olive Wood speci- Mn DEPOSITS, SOUTH AFRICA 1111 and the sametype of structure mens well-formed |  | | Journal (article/letter/editorial) | | Archean Mn deposits is striking, as is the massive Hotazel deposit at around 2.22 Ga. Several - sedimentary... West Africa Hotazel formation/Kalahari Mn field Minas Gerais, Brazil Koegas subgroup, S Africa 49 2200...sample. The absorption spectrum is sensitive to the local electronic and bonding environment of the absorbing...microscopically. Kutnohorite (cluster) Kutnohorite (Hotazel) Mn-calcite Rhodochrosite 2.1. Sample acquisition...Two were small Mn(IV) oxides identified from our Hotazel representative section and one was an abundant |  | | Journal (article/letter/editorial) | | coexistence of the primary sedimentary minerals, todorokite and birnessite, with their diagenetic conversion...stages of conversion of todorokite and birnessite to braunite and todorokite to manganite are preserved...that bixbyite was also produced by conversion of todorokite-birnessite. Pyrolusite and cryptomelane, con...documentation of diagenetic transformation of primary todorokite and birnessite directly to braunite and bixbyite...environments by hydrothermal/volcanogenic processes (e.g. Northern Apennine Ophiolitic Complex, Italy, Bonatti et |  | Santos, Felipe Holanda dos, Amaral, Wagner da Silva, Konhauser, Kurt, Martins, Douglas Teixeira, Castro, Marco Paulo de, Queiroga, Glaucia Nascimento, Chi Fru, Ernest, Andersen, Morten B. (2021) Unraveling sedimentary precursors and metal enrichment of high-grade metamorphosed manganese-rich rocks from the Borborema Province, northeastern Brazil. Ore Geology Reviews, 137. 104283pp. doi:10.1016/j.oregeorev.2021.104283 | Journal (article/letter/editorial) | | Paleoproterozoic deposits in Ghana, Gabon and South Africa in the Nsuta, Moanda and Kalahari manganese...(northeastern Brazil) and Birimian succession from West Africa for the West Gondwana. (A) West Gondwana in the...rocks from South America (Chisonga et al., 2012; Cabral et al., 2019) and Ghana in West Africa (Mücke et...operational mining activities in the Lagoa do Riacho mine are relatively recent and date from 2011. Its activities...Province into three major structural domains: the (1) Northern Bor borema Province, including the Médio Coreaú |  | | Journal (article/letter/editorial) | | environment 39 1. INTRODUCTION 40 The Urucum mining district occupies an area of approximately 800 km2 and...Urban et al. (1992) estimated that the Urucum district 47 contains more than 600 Mt of rock with high...environment, for the carbonate BIFs of the Santa Cruz Mine region 63 located on the southeastern part of...plateau. 64 This study presents evidence for local submarine hydrothermal exhalation and biogenic ...hematite (Fig 3B). Locally, at the Figueirinha 110 Mine, this conglomerate contains a carbonate boulder |  | | Journal (article/letter/editorial) | | concentrated in a few districts, suggesting a more local than global control on manganese metallogenesis...cryptomelane, manganite, nsutite, psilomelane, or todorokite. More complex divisions, such as by the types...Psilomelane Amorphous oxides Kutnahorite Mn-calcite Todorokite Others (oxides) 32.0 24.3 8.7 7.8 4.9 2.9 3...elements in Mn deposits would have been subject to local control by configuration of the sea floor and the...(Morey et al., 1991), whereas Fe-rich beds in the Hotazel BIF in the Kalahari Mn field average 0.73 to 1 |  | | Journal (article/letter/editorial) | | those of the New England Fold Belt (NEFB) to the south (part of the major Tasman geosyncline of the Australian...(Brooks 1962) England Fold Belt (NEFB) to the South (the simplest interpretation of the Gympie rocks)...intra-oceanic magmatic arc mobile belt now present in the South Island, New Zealand (Sivell and Waterhouse, 1987)...pyrolusite, nsutite, cryptomelane, manjiroite, todorokite, braunite, hematite, spessartine, tephroite,...alteration in the Kalahari manganese field, South Africa, found chemical differences in braunites i.e |  | | Journal (article/letter/editorial) | | ri Valleybasin(Chauduri et al.,1989). Carbonate mine trenches near the villages of Jamdapur and Nipani...COMMUNICATIONS LITHOLOGY 75 --• •.--f crystalline todorokite at the expense of the manganese carbonateprotore(Fig...Mn-richlithologies. A. Supergene todorokitefinecrystalline todorokite. rich manganese ore. Note small,irregularremnants...crystals in a veincrosscutting supergene altered todorokite-rich ore.Supergene alteration of manganite to...Replacement of kutnohorite microoids byflakysupergene todorokite (lightgray).Surrounding diagenetic chertisblack |  | | Journal (article/letter/editorial) | | listed in Table 3 in the appendix. CE P On average South African basalts, iron and manganese formations and...and 2.7 Ga-old shales from the Sherman Mine, Temagami Greenstone Belt, Canada (e. g. Bau and Alexander...river sediment samples from White Mfolozi River, South Africa (Mit), the two mud 12 ACCEPTED MANUSCRIPT...minimum of 0.03 and a maximum of about SC R 0.5. South African basalts from dolerite dikes, subjected to...manganese formations from the Paleoproterozoic Hotazel formation (Hot, e. g. Tsikos and Moore, 1997) show |  | | Report (volume) | | Mineral Foundation 63 Conyngham Street Glenside South Australia 5065 Australia (Orders: Tel. (08) 379-0444...Penganga Group of the Pranhita-Godavari valley, South India NICHOLSON, K., NAYAK, V. K. & NANDA, J. K...ores of the GhoriajhorMonmunda area, Sundergarh District, Orissa, India: geochemical evidence for a mixed...nodules with particular reference to the tropical South Pacific VON STACKELBERG, W. Growth history of manganese...Mn-oxide mineralization of Kato Nevrokopi, Macedonia, northern Greece: controls on formation of the Mn 4+ oxides |  | | Report (issue) | | Cover. Photograph of the Mamatwan open pit mine in South Africa. The black manganese layer is about 45 meters...folded layering is shown by the shapes of the various mine benches. Lighter material in the background is waste...Prospects for Future Supply Edited by Klaus J. Schulz, John H. DeYoung, Jr., Robert R. Seal II, and Dwight C...............................................L18 Mine Waste Characteristics ........................................................................L22 Mine Closure........................................ |  | | Journal (article/letter/editorial) | | Sedimentary Hotazel Formation with the Sedimentary Formation and Genetic in South Environments...Environments Cycles of the Prote- Africa of Primary Mn-Deposits in China Beukes, Sun N. J. Jiaf u Depositional...Proterozoic West, South Mineral Manganese Deposits of the Transvaal Africa Deposits in Hubei,...Sediments Ore Deposits in Wuling Mountain, South China Paakkola, Wei J. Lindun Ocurrences of...China Deposit Hydroxide Area Formation, in South the Manganese Mn-Fe of the Circulation Paleozoic |  | | Book | | 2. Model Test Area: Moanda Deposit, Gabon, West Africa 2.2.2.1. Introduction 20 20 23 23 23 25 25 27...Postmasburg Region, Griqualand West, Cape Province, South Africa 3.3.1. Geological Setting 3.3.2. Genesis...Manganese Ore Formation Manganese Ore Deposits of North Africa: Imini, Morocco 3.4.1. Geological Setting 3.4.2...ancient glaciers, and the glaciation epoch of the northern countries - in Scotland, in Scandinavia, in Finland...northeastern part of Russia, in states of Canada and the Northern Ameriea - they are found here in rivers, where |
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Hotazel Mine, Hotazel, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa