 | | 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 (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 |  | Fairey, Brenton J., Timmerman, Martin J., Sudo, Masafumi, Tsikos, Harilaos (2019) The Role of Hydrothermal Activity in the Formation of Karst-Hosted Manganese Deposits of the Postmasburg Mn Field, Northern Cape Province, South Africa. Minerals, 9 (7) 408 doi:10.3390/min9070408 | Journal (article/letter/editorial) | | Deposits of the Postmasburg Mn Field, Northern Cape Province, South Africa Brenton J. Fairey 1,†, Martin J...Geology, Rhodes University, Grahamstown 6139, South Africa Correspondence: h.tsikos@ru.ac.za Current address:...Postmasburg Manganese Field (PMF), Northern Cape Province, South Africa, once represented one of the largest...Postmasburg manganese field; hydrothermal; karst; South Africa Minerals 2019, 9, 408; doi:10.3390/min9070408...(KMF), the Postmasburg Manganese Field (PMF) was South Africa’s largest producer of this important component |  | | 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 sand, and these cryptomelane,psilomelane,hollandite,braunite,and youngdepositshavegreatlyhamperedthe...Morocco,for instance,hausmanniteand janekke,70 km south-southwest of Postmasburg. It was cobsiteoccurin |  | | 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) | | manganese oxides into cryptomelane and 36 then into hollandite. 2 37 KEY WORDS - Neoproterozoic–Cambrian...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 |  | | Journal (article/letter/editorial) | | manganeseoxides with tunnel structures include hollandite, coronadite, and cryptomelane (2-octahedra x...the hydrous speciesin them. They concludedthat hollandite minerals contain only a small amount of water...romanechite (calledpsilomelane)transformed to hollandite when heated to 550 oC,in agreementwith Fleischerand...relative ease with which romanechite transforms to hollandite. On the basis of orn data, Kulp and Perfetti...heating and that a gradual transformation to hollandite takes place as the tunnels collapsearound the |  | | Report (issue) | | dehydrogenation of groutite. Association: Pyrolusite, hollandite, cryptomelane, coronadite. Distribution: Some...Mohave Co., and at the Mistake mine, Yavapai Co., Arizona; from the Idarado mine, near Telluride, San Miguel...Miguel Co., Colorado; in the Monroe-Tener mine, near Chisholm, St. Louis Co., Minnesota. Along the East River...Pradesh. At the Iron Monarch quarry, Iron Knob, South Australia. From the Otoshibetsu and Tanno mines...From Bütten-Adenstadt, Lower Saxony, and the Clara Mine, near Oberwolfach, Black Forest, Germany. At Gebel |  | | 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 |  | | Catalog/List | | specimen. ~-x2tx1~", £18.00 10. AZURITE. Copper queen Mine, Bisbee, Arizona, U.S.A. Select bright blue radiated... 4x1~1i", £23.00 ~ • BARYTES. Settlingstones Mine Hexham, N:rthumberland. Choice lustrous creamy sharp...matrix2Sx13 mm. £fi. SDp 14. CALCITE. TSLmeb, otavi, S.W. Africa. An interesting group of translucent creamy sharp...MALACHITE. 2tx1i", £1t.SOp 19. CHALCOCITE. Levant Mine, Bendeen, Cornwall. Very rich metallic grey heavy...association. 2ix2-!x1i", £3.2Sp 20. CHALCoCITE. Levant Mine, Pendeen, Cornwall. Very fine bright silvery-grey |  | | Catalog/List | | crystals. Good display piece. Vambori, Ahmedhagar District, Maharashtra State, lndia about 5x2.5 inches £70...with micro Sphalerite on 2x2 matrix Lers Malines Mine, Gard, France £20 4. BENTORITE a very rare, Cr containing...crystals, possible Dickite micros too. Panteg-y-Gaseg Mine, Amlwch Anglesey, Wales £18 I 0. PENNANTITE small...matrix. Plates are about I to 1.5 mm size (Benallt Mine,Lleyn, Wales) £30 11. BOURNONITE good blocky grey...crystals,. all over 2.5 x2.5 inch surface Likasi Mine, Katanga Congo £25 14. SIDERITE rich red-brown |  | Franceschelli, M., Puxeddu, M., Carcangiu, G., Gattiglio, M., Pannuti, F. (1996) Breccia-hosted manganese-rich minerals of Alpi Apuane, Italy: A marine, redox-generated deposit. Lithos, 37 (4) 309-333 doi:10.1016/0024-4937(95)00026-7 | Journal (article/letter/editorial) | | piemontite, braunite, hollandite and minor rhodochrosite and kutnahorite; (3) braunite, hollandite and rare piemontite...microplate with the Adria plate generated the Northern Apennines through the empilement of several tectonic...total thickness of 3 m. (4) Braunite and/ or hollandite-rich metabreccia: bed with centimetre to decimetre-sized...silt-size matrix; thickness is 5-6 m. (5) Piemontite-hollandite-braunite metabreccia: subrounded brown clasts...maximum thickness of 50 m. In the whole of the Northern Apennines this type of metabreccia was found only |  | | Journal (issue) | | (No 143) - 2009 , 65 - Amethyst , (oval cut) , Africa , 34,40 cts - Ametrine , octagon cut , Bolivia...Australia : – Opal Book A lovely book on Opal, South Australia s Gemstone is available for 22 Australian...Economy Air Mail). This is a publication of the South Australian Department of Mines and Energy. Size...Official Distributor in Europe for the book: Opal, South Australia s Gemstone. European orders will be forwarded...Attention : The Editor , P. O. Box 151 , Eastwood , South Australia 5063 , Australia . Tel (08)-274-7500 |  | | Report (issue) | | Strategic Minerals Inventory Summary Report-Manganese By John H. DeYoung, Jr., David M. Sutphin, and William F...Federal Republic of Germany, the Republic of South Africa, and the United States of America 1984 CIRCULAR...Products Section, U. S. Geological Survey, 604 South Pickett Street, Alexandria, VA 22304 FOREWORD...phase of the inventory. The report was prepared by John H. DeYoung, Jr., and David M. Sutphin of the U.S...F. Cannon (chief compiler), USGS; Ian Goldberg, South African Department of Mineral and Energy Affairs |  | De Putter, Thierry, Liégeois, Jean-Paul, Dewaele, Stijn, Cailteux, Jacques, Boyce, Adrian, Mees, Florias (2018) Paleoproterozoic manganese and base metals deposits at Kisenge-Kamata (Katanga, D.R. Congo) Ore Geology Reviews, 96. 181-200 doi:10.1016/j.oregeorev.2018.04.015 | Journal (article/letter/editorial) | | 3080 Tervuren, Belgium Royal Museum for Central Africa, Geodynamics and Mineral Resources, Leuvensesteenweg...have been recognized for 18 various parts of Africa. It is a relatively small deposit with total estimated...in various parts 36 of Africa and in geologically related parts of South America (cf. Roy, 2006; Kuleshov...a recent review paper on manganese deposits of Africa, it has been 46 described as a 2.0-2.2 Ga deposit...with contemporaneous Mn ore deposits in Africa 62 and South America. The presence of base metals in |  | | Journal (article/letter/editorial) | | environments by hydrothermal/volcanogenic processes (e.g. Northern Apennine Ophiolitic Complex, Italy, Bonatti et...the lower Proterozoic Transvaal Supergroup, South Africa (Beukes, 1983, 1984; Miyano and Beukes, Dr...todorokites described from the type locality of Todoroki mine, Japan (Yoshimura, 1934) and the Ponupo deposit...that of todorokite from Cuba (5.51%), the Todoroki mine (3.28%) and many ocean-floor ferromanganese nodules...from Mamatwan deposit, Transvaal Supergroup, South Africa. The unusual anisotropism shown by some grains |  | Dasgupta, Somnath, Banerjee, H., Fukuoka, M., Bhattacharya, P.K., Roy, Supriya (1990) Petrogenesis of metemorphosed manganese deposits and the nature of the precursor sediments. Ore Geology Reviews, 5 (4) 359-384 doi:10.1016/0169-1368(90)90039-p | Journal (article/letter/editorial) | | rock). The oxides present are braunite, bixbyite, hollandite, jacobsite, hausmannite, "vredenburgite"*, while...mutually exclusive occurrences of jacobsite and hollandite and jacobsite and "vredemburgite" are significant...Bhattacharya et al., 1984b) into hollandite-bearing (i-iii and hollandite-free types (ivvii). (See Table...type IIIB assemblages are devoid of bixbyite and hollandite, but contain minor rhodochrosite (Tables i and...assemblages In assemblages (i-iii), braunite(i) and hollandite often show strong preferred orientation (Roy |  | | Journal (article/letter/editorial) | | with different laser light wavelengths. For the hollandite-group minerals, the frequency of the Raman mode...Manganese oxide, Raman spectroscopy, todorokite, hollandite Introduction Manganese oxide/hydroxide minerals...technique is that the spectra provide information about local atomic coordination environments as well as longer-range...Postmasburg, South Africa Hausmannite C6568-1 Hotazel, South Africa Manjiroite Smaart Mi, South Africa a Cryptomelane...Ironwood, MI Montreal Mi., WI Virginia a Hollandite 127118 Ultevis, Sweden 93687 Michigan Tower |  | | 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 |  | | Journal (article/letter/editorial) | | phase is constituted by MnO2 layers. Its large local structural order contrasts with the short range...corner-sharing octahedra. This iron phase possesses the same local order as feroxyhyte, but is long range disordered...structure of these materials is its sensitivity to the local structure around the x-ray absorbing atom. Typically...corners T(1,1) pyrolusite T(1,2) ramsdellite T(2,2) hollandite T(2,3) psilomelane T(3,3) todorokite 2.87 A...generally suffice for the determination o f the local geometry o f crystals. The ability and limitations |  | | Journal (article/letter/editorial) | | rocks of at least two Mn deposits: the Noda-Tamagawa Mine in Japan [16] and on Paros Island in Greece [10]...example, at the Gambatesa and Molinello deposits in northern Italy [22]. The metamorphic parameters of these...of the Mamatvan type in the Kalahari group in South Africa, which were metamorphosed at à ≈ 120–200°ë,...in New Zealand [33], Gambatesa and Molinello in northern Italy [22], and others. Native Cu is stable under... GEOCHEMISTRY INTERNATIONAL Mamatwan, Kalahary, South Africa 2 Vol. 45 No. 4 2007 T = 275 ± 25°C, P |  | | Book | | On a spectacular find of crocoite in the Adelaide mine, Dundas, Tasmania (by A. H. Chapman) 3:111-113 ADOLFSSON...AJO Famous mineral localities: the New Cornelia mine, Ajo, Arizona (by W. J. Thomas & R. B. Gibbs) 14:283-298...ALLEN, GEORGE B. --and W. Hunt: The Tonopah-Belmont mine, Maricopa County, Arizona 19:139-144 ALLGOOD, GENNE...Allgood, C. Williams: Ramsdellite from the Mistake mine [Arizona] 14:333-335 ALLGOOD, ROBERT W. -with G...the Mistake mine [Arizona] 14:333-335 ALMA Famous mineral localities: the Home Sweet Home mine, [near Alma |  | | Catalog/List | | price paid for the mineral(s). CTINCX..ITE: M179. Mine Mompti, Spain; (a) rich vuggy intergrown prisms...an rock; 1.5-3 cm-$1.50 NHYDRITE: M204. Campiano Mine, Grosseto, Tuscany, Italy; good for species; pale...shaped rock; 6xS.3x3-S12.50 -~ AUTUNITE:M95. Oaybreak Mine, Spokane, Washington; (a) 5 xls & groups, 1-1 .8...(e) 6x3.6x1 .5-$20.00 AZURITE:M37. United Verde Mine, Jerome, Arizona; (a) lustrous ball af intergrcwn...intergrcwn xls; 1 .B-3.2 cm-$2.25 M65. Hanover Mine, near Fierro, New Mexico; (a) T/N; nice balls to rosettes |  | | Journal (issue) | | publisher affiliated with the Friends of Mineralogy John S. White Smithsonian Institution in e ra lo g ica...Three May-June 1980 ARIZONA! Articles The Hamburg mine and vicinity, Yuma County, Arizona by D. M. Shannon...Shannon Famous mineral localities: the Red Cloud mine, Yuma County, Arizona...............................charges. foreign payments remittance may be made in local currency, without surcharge, to the following people:...Deepwood Crescent Don Mills, Ontario M3C 1N8 South Africa: Horst Windisch 30 Van Wouw Street Groenkloof |  | | Report (issue) | | famous Mesoarchean Witwatersrand Supergroup in South Africa that contains Earth’s largest gold-uranium deposits...post-depositional processes in uranium ores at the Stanleigh mine, Elliot Lake, Ontario, Canada.....................glacier-associated sediments of the Neoproterozoic of south China: Oceanic anoxia or sulfate limitation? .....botryoids at a 350 Ma fossil warm spring at the Tynagh mine, Ireland: (A) The top surface (field of view measures...seepage mound favored—depending on solutes and local pH—development of siderite, ferrous hydroxide, and/or |
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