 | | 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 |  | | 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 ................................................................... APPENDIX II - TYPE-LOCALITY DETAILS......................... |  | | 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) | | Ettringite N’Chwaning II Mine, Northern Cape Province Republic of South Africa C oncrete, that manmade...N’Chwaning II mine, Kalahari manganese field, Northern Cape Province, Republic of South Africa. This specimen...to 2 mm, some associated with calcite. The Clara mine, Ober Wolfach, Schwarzwald (Black Forest), Baden-Württemberg...(1984) notes that ettringite crystals from the Clara mine may be mistaken for aragonite, and vice versa. Italy...cement used for a sea-wall of possible World War II age (Rodgers and Courtney 1988). The ettringite occurs |  | | Journal (article/letter/editorial) | | PO Box 524, Auckland Park 2006 Johannesburg, South Africa brucec@uj.ac.za Lucas Becker photo. T Jacobus...N’Chwaning III mine in the Kalahari manganese field, Northern Cape Province, South Africa. Crystals are...sugilite crystals, white pectolite, lipuite, braunite-II, hematite, and microscopic namansilite and norrishite...180 ROCKS & MINERALS aniajacoite is named after South African married couple Jacobus “Jaco” Stephanus...Heidelberg in what was then the Transvaal Province, South Africa, and grew up on a farm located between Bethal |  | 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...KEYWOm3S:hausmannite, Kalahari manganese field, Wessels mine, ferrimagnetism, iron content. Introduction |  | | Journal (article/letter/editorial) | | manganese ore in the Kalahari manganese ®eld, South Africa Received: 28 May 1996 / Accepted: 22 January...Mamatwantype ore is altered to high-grade oxide-rich Wessels-type ore in association with normal faults. Mass...manganese ®eld (Fig. 1) highgrade hausmannite-rich Wessels-type ore (KleyenstuÈber 1984) formed as a product...sedimentary braunite-rich Mamatwan-type ore along a series of normal faults in the Wessels-Nchwaning and...35±38 wt.% in original sedimentary carbonate-rich braunite lutite to values of 45±60 wt.% in carbonate-poor |  | | Journal (article/letter/editorial) | | phaserelationsinvolvemajoroxideminerals of the ores,namely,braunite,brauniteII, hausmannite, bixbyite,jacobsite,andhematite...hydrothermalsolutionsinto the high-grade,high-temperature Wessels-type oresconsistingof brauniteII, bixbyite,hausmannite...brauniteis muchlessabundant in the high-grade Wessels-type ore thanin theIgw-grade Mamatwan-type ore...reactingwith silica released from braunitc to form braunite II and andradite. Introduction THE Kalaharimanganese...ProterozoicTransvaalSupergroup in the northern Cape Province, South Africa (Fig. 1A),mostprobablyrepresents |  | Gu, Xiangping, Yang, Hexiong, Xie, Xiande, van Nieuwenhuizen, Jaco J., Downs, Robert T., Evans, Stanley H. (2019) Lipuite, a new manganese phyllosilicate mineral from the N'Chwaning III mine, Kalahari Manganese Fields, South Africa. Mineralogical Magazine, 83 (5) 645-654 doi:10.1180/mgm.2019.12 | Journal (article/letter/editorial) | | mineral from the N’Chwaning III mine, Kalahari Manganese Fields, South Africa Xiangping Gu*1 , Hexiong Yang2...School of Geosciences and Info-Physics, Central South University, Changsha, Hunan 410083, China; 2Department...and 4Plot 968, Alheit, Kakamas 8870, Northern Cape, South Africa Abstract A new phyllosilicate mineral...N’Chwaning III mine, Kalahari Manganese Fields, Northern Cape Province, Republic of South Africa. It occurs...Kalahari Manganese Fields in the North Cape Province of South Africa hosts the largest manganese resource |  | | 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...least two other well-recognised ore types, namely Wessels-type (affected by hydrothermal alteration only)...a finegrained braunite I and kutnohorite matrix (Kleyenstüber, 1984; 1985). The Wessels-type ore is a...a high-grade, braunite II- and bixbyite-rich, carbonate-poor equivalent of the Mamatwan-type ore, and |  | | 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...hematite (20–250 µm), within both Mamatwan- and Wessels-type ore, generates a paleomagnetic pole (present...sample suite (WESS) is restricted to high-grade Wessels-type ore, rich in high Fe hausmannite and coarser |  | | Journal (article/letter/editorial) | | primary sedimentary Mamatwan-type ore to high-grade Wessels-type ore took place along a system of normal fimlts...in the northwestern part of the KMF. High-grade Wessels-typc ore (Fig. 1B) is developed immediately adjacent...versus areas dominated by hydrothermally altered Wessels-type ore. Cornell and Schiitte (1995) either ignore...of the Hotazel Formation, are only known from Wessels-type ore (so clearly they are mixing as it were...Hydrothermally altered Wessels-type ore, consisting predominantly of braunite II, hausmannite and hematite |  | | 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...classic supergene enriched, hydrothermally enriched (Wessels-type ore) and thrusted manganese ore. When normalised...“Diagenetic ore”; and the high-grade, low-carbonate Wessels-type ore. Displaying numerous kutnohorite (Ca(Mn2+ |  | | 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)...and these cryptomelane,psilomelane,hollandite,braunite,and youngdepositshavegreatlyhamperedthe searchfor...Morocco,for instance,hausmanniteand janekke,70 km south-southwest of Postmasburg. It was cobsiteoccurin |  | | 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)...(Mineralogical Research; San Jose, CA) Forrest Cureton II (Stockton, CA) Rock Currier (Jewel Tunnel Imports; |  | | 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...Mamatwan Mukulu Hydrothermal Supergene Unconformity Wessels The Thrusted manganese ore above the Blackridge...Manganese Field, South Africa has undergone three significant alterations events, namely the Wessels alteration...Mamatwan-type manganese ore from Mamatwan mine in the south of the Kalahari Manganese Field as a reference |  | | Journal (article/letter/editorial) | | sedimentary manganese orehasbeenupgraded to high-grade Wessels-type orein theKalahari manganese field.Thealteration...smallhill near Hotazel, at what is now the Black Rock mine orearepoorlyunderstood. In addition, theeffectofferrugini-...manganesemum known thickness of about 45 m at the Mamatwan mine ore (Gutzmer, 1993; Gutzmer and Beukes,1993). andranges...sedimentary structures ranges fromgoodtoabsent in Wessels-type ore.Transitions fromWessels-type oreto low-grade...Leinster-Deposi! fields are listed in Table 2. ISevern Wessels-type oreappears toberestricted tothenorthwesternpartoftheKalahari |  | | Report (issue) | | Pattern: N’Chwaning III mine, Northern Cape Province, Republic of South Africa. 2.895 (100), 2.713 (53)...2O. (2) N’Chwaning III mine, Northern Cape Province, Republic of South Africa; average electron microprobe...Occurrence: In high-grade Wessels-type Mn ore, mainly hausmannite, bixbyite, braunite-II, and manganite, formed...N’Chwaning III mine, Kalahari Manganese Fields, Northern Cape Province, Republic of South Africa. Name: Honors...mineral from the N'Chwaning III mine, Kalahari Manganese Fields, South Africa. Mineral. Mag., 83, 645-654 |  | | Journal (article/letter/editorial) | | manganese ores of the Postmasburg manganese field, South Africa J. GUTZMERAND N. J. BEUKES Department of Geology...University, P.O. Box 524, Auckland Park, 2006, South Africa Abstract The diagenetic to very low-grade metamorphic...of braunite group minerals, including braunite, partridgeite and bixbyite, with rare braunite II and...and Ca-poor, silica-depleted braunite. Iron-poor partridgeite is distinguished from Fe-rich bixbyite and...Ca-poor, silica-depleted braunite is reported for the first time, Braunite and partridgeite formed during |  | | Journal (article/letter/editorial) | | Bolton (Editor), Metallogenesis of Manganese, Vol. II. Ore Geol. Rev., 5: 341-357. Sedimentary manganese-oxide...their diagenetic conversion products, manganite, braunite and bixbyite. The mineralogical characters and...phases as well as their texture are discussed. Braunite occurs in two generations, one earlier or contemporaneous...of conversion of todorokite and birnessite to braunite and todorokite to manganite are preserved. The...primary todorokite and birnessite directly to braunite and bixbyite should be considered while extrapolating |  | | Journal (issue) | | ARTICLES: Chalcophanite from the Mou'nt Stewart Mine Leadville, NSW. England, B.M. 1�):9-11 Definition... A. 2(1):21-24 Heulandite from the Illawarra District, NSW. Carr, P., Perkins, M., Chenhall, B., Pemberton...1(2):27 Minerals from. t� Spring Creek Mine, near Wilmington, South Australia. Beyer, B. and Elliott, P...P. 2(2):57-70 The minerals of the Magnet Mine, Tasmania. Haupt, J., Bottrill, R. and Sorrell, S. 1(1):3-19...Pyramid Hill, Victoria. Birch, W.D. 2(2):47-50 Post-mine sulphates from Teutonic Bore base metal deposit |  | Nyfeler, Daniel, Armbruster, Thomas, Dixon, Roger, Bermanec, Vladimir (1995) Nchwaningite, Mn (super 2+)2SiO3(PJ)2.H2O, a new pyroxene-related chain silicate from the N'chwaning Mine, Kalahari manganese field, South Africa. American Mineralogist, 80 (3) 377-386 doi:10.2138/am-1995-3-419 | Journal (article/letter/editorial) | | silicate from the N'chwaning mine, Kalahari manganesefield, South Africa D.lNrtr, Nwnr.nnoTHonmsAnrvrnnusrrn...Geological Survey, PB Xl 12, 0001 Pretoria, South Africa Vr,lnrurn BnnueNnc Department of Mineralogy...N'chwaning mine, located in the Kalahari manganesefield, northern Cape Province, South Africa. The aggregatesconsist...in size. Nchwaningite is named after the mine N'chwaning II, where it was found first. Nchwaningiteis...communication) assumeda primary precipitation of braunite together with calcium manganesecarbonates,whereasBau |  | | Journal (article/letter/editorial) | | Proterozoic Manganese Group, Western Australia BRAUNITE of general composition Mn 2+ Mn63+ SiO12 (Fleischer...mineral exists in two polysomes, normal braunite (or braunite 1) which corresponds to chemical composition...MnSiO3 with about 10% SiO2 and a rarer form, braunite II, which appears to contain certain essential calcium...on thc Kalahari manganese ores of South Africa suggest that braunite ! is a product of sedimentary-diagenetic...while braunite II is characteristic of hydrothermal alteration zones (Wessels-type ore). Braunite is thus |  | | Journal (article/letter/editorial) | | 1992 Mineralogy, paragenesis and genesis of the braunite deposits of the Mary Valley Manganese Belt, Queensland...deposits consist mainly of isolated occurrences of braunite, together with a number of lower and higher valency...age. The parageneses are: (a) Braunite - quartz (primary). (b) Braunite - hausmannite spessartine tephroite...(metamorphic). (c) Hydrated manganese silicates - barite - braunite - hausmannite (hydrothermal veins). (d) Tetravalent...manganese oxide reacted with silica to produce primary braunite. The later geological of evolution of this vo |  | | Journal (issue) | | HarokJ and Efica Van Pelt Los Angeles, CA Founder John $ a ~ White l;uropean earr•pol)dent ' ' " " The...Seelite, a new uranium mineral from the Talmessi mine, Iran, and Rabejac, France .......................emphasis or clarity, and (d) proper names, e.g., mine levels. 8. Credits. Caption data for specimen photos...9, no. l, p. 5-13). The collector's library-part II: Minerals of the United States (vol. 10, no. I, p...814-2257 FAX: (818) 338-4617 Wholesale Only Kassionas John and Dolores Kassionas P.O. Box 578 Alviso, California |
|
Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa