 | | Journal (article/letter/editorial) | | lateritic manganese ore deposit of Tambao (northern Burkina Faso), a present unexploited deposit among...collected from the massive 80-m high Mn-rich hill at Tambao. A detailed petrographical study shows that these...mm/Ma. These ages clusters show that weathering at Tambao was functioning during the early Eocene and thus... Hénocque et al. Fig. 1. (a) Location of the Tambao Manganese deposit. (b) Topographical map of the...generations in concretions collected at Tambao deposit (Burkina Faso), one of the cryptomelane-richest deposit |  | | Journal (article/letter/editorial) | | dans t rois gisements d'Afrique de I'Ouest Mokta, Tambao, Nsuta E. A. Perseil Laboratoire de Mineralog:ie...with the appearance of transitory minerals: lithiophorite issued f r o m garnets, manganite or birnesite...par l'apparition de rnin6raux transitoires: lithiophorite issue des grenats, manganite ou birnessite issues...Gisements de manganese: A: Mokta. B: Nsuta. C: Tambao . . ,. . . . Par l'analyse min~ralogique...d'Afrique de l'Ouest; Tambao, dans la zone sah~lienne. Si l'on dolt tenir Mokta et Tambao comme de petits gisements |  | | Journal (article/letter/editorial) | | amorphous, silicoaluminous phase remains. -lithiophorite neoformation: Added manganese combines with...silico-alumineuse subsiste seule. - ntoformation de lithiophorite: du mangantse import6 se combine avec l'aluminium...de transformation des protores, manganite et lithiophorite, /~ des min6raux de pr6cipitation du mangan6se...des grenats. Quelques 6chantillons du gisement de Tambao, dans la r6gion sah61ienne du nord de la Haute-Volta...de Mokta, 5 fi 50 g pour l'6chantillon HV 16 de Tambao. I1 varie assez largement dans un m~me gisement |  | | Journal (article/letter/editorial) | | weathering history of the Central African Great Lakes Region – Tectonics drives, climate assists Thierry De...weathering history of the Central African Great Lakes Region – Tectonics drives, climate assists, Gondwana Research(2020)...weathering history of the Central African Great Lakes Region – tectonics drives, climate assists Thierry De...Kasekelesa (former Katanga Province) and Mwene-Ditu (former Kasai Province). For the present study, cryptomelane-rich...Kisenge deposit, in the western part of the Lualaba Province (formerly Katanga) of the Democratic Republic |  | | Book | | Deposits (Nsuta, Ghana; Mokta, Cöte d'Ivoire; Tambao, Burkina Faso (Upper Volta» 2.2.3.1. Geological Setting...Alteration 2.2.3.2.1. Nsuta 2.2.3.2.2. Mokta 2.2.3.2.3. Tambao 2.2.3.3. Mineralogy and Geochemistry of the Late...General characteristics 2.2.3.3.2. Mokta 2.2.3.3.3. Tambao 2.2.3.3.4. Nsuta 2.2.3.4. Features of the Protore...Paleokarst: Deposits of the Postmasburg Region, Griqualand West, Cape Province, South Africa 3.3.1. Geological...Bishop, Lohatlha, Glosam, and Kapstewel, Postmasburg Region, Griqualand West 3.3.2.3. Processes of the Manganese |  | | Journal (article/letter/editorial) | | Higher in the profile, garnets alter directly to lithiophorite; in this geochemical environment A1 is no longer...ramsdellite or pyrolusite. The associated nsutite and lithiophorite are the principal phases of the hard manganese...Mn-oxihydroxide; then higher in the profile, lithiophorite develops directly at the expense of parent garnets...garnets begin to alter into a secondary matrix (lithiophorite). In the same way, the first-formed matrix (birnessite)...of garnets by cryptocrystalline birnessite. LITHIOPHORITE FORMATION: SECOND STAGE OF GARNET WEATHERING |  | | Journal (article/letter/editorial) | | tandfonline.com/loi/tigr20 THE NATURE AND GENESIS OF LITHIOPHORITE a a a F. V. Chukhrov , A. I. Gorshkov , A...Berezovskaya (1985) THE NATURE AND GENESIS OF LITHIOPHORITE, International Geology Review, 27:3, 348-361...com/page/termsand-conditions THE NATURE AND GENESIS OF LITHIOPHORITE F. V. Chukhrov, A. I. Gorshkov, A. V. Sivtsov...controversy as to the correct unit cell of lithiophorite and defines the conditions necessary for the...manganese oxides. As an example, one can cite lithiophorite. In 1952 Wadsley [34] determined its struc |  | | Journal (article/letter/editorial) | | rggion ou de gisements comme ceux de Grand-Lahou, Tambao ou Nsuta (Perseil et Grandin, 1978): la nature...schistes min~ralis6s semis de petites plages de lithiophorite et de goethite, d'autres grenats ~tant remplac6s...~vidence des cavit@s poly@driques tapiss~es de lithiophorite (Fig.8). II peut s'agir d'anciens grenats de...et gibbsite peuvent ~tre impr&gn~es par la lithiophorite qui forme des liser~s sur leur bord, s'~paississant...que la kaolinite et la gibbsite se m~lent la lithiophorite finement cristallisle (elles sont d~tect~es |  | Parc, Sylvie, Nahon, Daniel, Tardy, Yves, Vieillard, Philippe (1989) Estimated solubility products and fields of stability for cryptomelane, nsutite, birnessite, and lithiophorite based on natural lateritic weathering sequences. American Mineralogist, 74 (3-4) 466-475 | Journal (article/letter/editorial) | | stability for cryptomelane,nsutite, birnessite,and lithiophorite basedon natural lateritic weatheringsequences...minerals birnessite, cryptomelane, nsutite, and lithiophorite are the major manganeseoxides. New stability...formation of these minerals are either unknown (for lithiophorite) or unreliable becauseofthe lack of good cr...for nsutite, cryptomelane, birnessite, and lithiophorite that are consistent with petrographic and mineralogical...GIBBSITE LftOfrGft t *ut.-l-t +M-n- + LITHIOPHORITE | *3--r NSUTITE PYROLUSfTE t t sgs NSUTITE |  | | Report (issue) | | given to a plant that would use ore from a future mine in the Carajas regon in Brazil. Gabon is also considering...development of the Azul deposits in Brazil and the Tambao deposit in Upper Volta depends upon the construction... ),;J",>-~ AUSTRALIA r?''A f'~ ·Groote Eylandt mine~·,; \ ,,..-··· '\ }... _,,,.r·:.,.• ,.j J ·· ...TABLE mine (1959), the Mamatwan mine (1964), the Wessels mine (1973), the Middelplaats mine (1979),...the Black Rock mine, the world manganese production accounted for by the Smartt mine (which opened in |  | | Book | | Semi-Arid Regions: the Brazilian Sertao and the African Sahel .................... . . 157 1 Introduction ....plasma. To what extent these processes affect any region on earth depends on the processes involved, on...also found in the Ifni granite of the Anti-Atlas region, Morocco, for instance. First case: calcite replaces...barite in certain Parna soi ls of the Murrumbidgee region, New South Wales.Aust JSci 20:274- 275 Bech J,...mulations calca ires dans les limons de Matmata de la region de Ga bes en Tunisie.Sci Geol Bull (Strasb) 37:387-398 |  | | Journal (article/letter/editorial) | | africains Dans les grands gisements africains (Tambao, Haute Volta, Mokta-Cdte d'Ivoire, Moanda-Gabon)...Roman6chRes de la zone de cuirasse du gisement Tambao (Haute Volta) - (Collection G. Grandin) Analyste...r6flectance pour diff6rentes cryptom61anes. 7 et 10: Tambao (Haute Volta), 8: Nsuta (Ghana) Fig. 5. Dispersion...thermoponderales de cryptom61anes, 8.' Nsuta (Ghana) 10: Tambao (Haute Volta) 1000 t'c 11 9: la Matte (Ande...thermopond6rales de roman6chites de cuirasse, gisement de Tambao (Haute Volta), analyses chimiques 5 et 6 Fig. 11 |  | | Journal (article/letter/editorial) | | cryptomelane, which is subsequently epigenized by lithiophorite. The geochemical balance computation at each...the bottom of the profiles. Cryptomelane and lithiophorite constitute the more stable forms of manganese...Remplissage des fissures secondaires par de la lithiophorite geodique (L) en bordure des vides (V), affectant...Cryptomelane (3) _ retromorphoses / • • Lithiophorite de remplacement V VV O Lithiophorlte geodique...d'oxydes de mangan6se appara~t. I1 s'agit de la lithiophorite (principaux pics observ6s/l 9,400 A; 4,711 A; |  | | Journal (article/letter/editorial) | | further manminerals (e.g. todorokite and ganese lithiophorite). A slightly different idea is presented by...followed by formation of laterite, producing lithiophorite, todorokite, nsutite and psilomelane were later...Cretaceous fault block movements have occurred in the region (Frakes, 1979 ) . The basement rocks are overlain...cryptomelane, birnessite, nsutite, psilomelane, lithiophorite, vernadite, manganocalcite; nuclei contain silt...cryptomelane, birnessite, nsutite, psilomelane, lithiophorite, vernadite, nuclei contain silt, sand grains |  | | Journal (article/letter/editorial) | | Digital elevation map showing landscape of the Zunyi mine and surrounding areas. Data are from International...Blocks during the Triassic (GBGMR, 1987). This region is characterized by a humid subtropical climate...bands of cryptomelane, nsutite, pyrolusite, and lithiophorite. (c) Cryptomelane occurring along interlayered...crystals. Cm: cryptomelane, Goe: goethite, Lit: lithiophorite, Nu: nsutite, Py: pyrolusite. Please cite this...of pyrolusite (β3+ MnO2), nsutite (γ-MnO2), lithiophorite (LiAl2[Mn4+ ]O6[OH]6), 2 Mn and todorokite ([Ca |  | Deng, Xiao-Dong, Li, Jian-Wei, Vasconcelos, Paulo M., Cohen, Benjamin E., Kusky, Timothy M. (2014) Geochronology of the Baye Mn oxide deposit, southern Yunnan Plateau: Implications for the late Miocene to Pleistocene paleoclimatic conditions and topographic evolution. Geochimica et Cosmochimica Acta, 139. 227-247 doi:10.1016/j.gca.2014.04.036 | Journal (article/letter/editorial) | | landscape evolution. Weathering profiles in the Baye Mn mine are dominated by 20-30 m thick saprolites, which...older weathering profiles, now dismantled, in the region. Manganese oxide 40 Ar/39Ar ages of the Baye...cryptomelane, with minor amounts of pyrolusite, lithiophorite, and hollandite (Table EA1 and Fig. 4 and 5)...with other Mn oxide phases such as pyrolusite, lithiophorite, or hollandite (Fig. 4a, c). Secondary electron...radiating perpendicularly to the growth bands. Lithiophorite is frequently present in the innermost part |  | | Journal (article/letter/editorial) | | Birimian rocks that form part of the Eburnian province of the Man Shield in the southern segment of the...relics of pyrolusite, early lithiophorite and overgrows nsutite. Late lithiophorite occurs in veins (about...supergene alteration are lithiophorite-I, nsutite, manganomelane, lithiophorite-II and goethite. The formation...trois gisements d' Afrique de l' Ouest: Mokta, Tambao, Nsuta. Mineralium Deposita 13: 295±311 Plimer |  | Nahon, Daniel, Beauvais, Anicet, Boeglin, Jean-Loup, Ducloux, Jacques, Nziengui-Mapangou, Pacome (1983) Manganite formation in the first stage of the lateritic manganese ores in Africa. Chemical Geology, 40 (1) 25-42 doi:10.1016/0009-2541(83)90089-x | Journal (article/letter/editorial) | | thermodynamic values. Manganite may only exist in a pH region > 7.5 (at 25°C and 1 atm, for log [Mn 2÷] = -6...longer stable and converts to birnessite and lithiophorite, and the spessartite garnet is also converted...1953. The manganese mineralizations at the Merid-Mine, Minais-Gemis, Brazil. Ph.D. Thesis, Harvard University...dans trois gisements d'Afrique de l'Ouest: Mokta, Tambao, Nsuta. Miner. Deposita, 13: 295--311. Roy, S. |  | | Journal (article/letter/editorial) | | 2015 F.V. CHUKHROV ET AL. FIGURE .'3. Co-Ni-lithiophorite, Ufalcy deposit, Central Urals. n i c k e l...t u r e of N i - a s b o l i t e and Co-Ni-lithiophorite. DEPOSITS OF THE SOUTH URALS Kempirsay : C...N i - a s b o l i t e , N i asbolite, Co-Ni-lithiophorite, vernadite, h o l l a n d i t e , romanechite...e ) . Elizavetinskoye* Co-Ni-asbolite. : lithiophorite, *Name not verified — IGR Editor. 721 Lipovskoye...i g s . 5-10). FIGURE 6. FIGURE 5. Co-Ni-lithiophorite, Moa deposit, Cuba. A s b o l i t e i s widely |  | | Journal (article/letter/editorial) | | such as nsutite, cryptomelane, pyrolusite, lithiophorite and a variety of manganese and iron oxides (Sorem...the other hand, span the immiscible, two-phase region which, according to experimentally determined solvi...the study. The Management and Sta of the Nsuta mine, Ghana, oered tremendous help during ®eldwork in...dans trois gisements d'Afrique de l'Ouest : Mokta, Tambao, Nsuta. Miner Deposita 13:295±311 746 Peters...Fransolet A-M (1994) Virtually pure ottrelite from the region of Ottre, Belgium. Eur J Mineral 6:547±555 Theye |  | | Journal (article/letter/editorial) | | (Birimian) rocks of Ghana are part of the Eburnean province of the Man shield, which is the southern part...Other common tetravalent manganese oxides are lithiophorite, vernadite, hollandite, and nsutite. The manganese...It was not possible to prove the presence of lithiophorite and nsutite, and pyrolusite is rare compared...over Fe in all manganese deposits of the Eburnean province suggests a very powerful separation mechanism...Proterozoic successions of, for example, the Superior Province, have not been observed in the Birimian Supergroup |  | | Book (edition) | | Internal Twinning Reflect. Mineral Valleriite Lithiophorite yellow, red, brown Goethite strong, orange...brownish tint; 12.00 Vauquelinite Vivianite Lithiophorite few, redbrown on edges and along cracks brownish... Mineral Descriptions Molybdenite in Graphite; Bogala Mine, Sri Lanka 51 Copper, native Synonym(s): Cuivre...of cuprite (bluish grey); North Mine (North Broken Hill Mine; NBH Mine), Broken Hill, Yancowinna Co.,...internal reflections); Madenköy Mine, Çayeli, Rize Province, Black Sea Region, Turkey (sample: Halbach); XPL |  | | Book (edition) | | IV/F.06-80 742 Feitknechtite IV/F.06-90 744 Lithiophorite IV/F.07-10 746 Heterogenite IV/F.07-30/40 748...(yellowish white), quartz (dark grey); New Bullfrog mine, Nye Co., Nevada, USA [h]; Nic. // Anhedral electrum...(greenish grey), quartz (dark grey); New Bullfrog mine, Nye Co., Nevada, USA [h]; Nic. // Anhedral electrum...(bluish grey shades), quartz (dark grey); New Bullfrog mine, Nye Co., Nevada, USA [h]; Nic. // 8 Gold A ...sample - photo A), dolomite (dark grey); Harstigen Mine, Pajsberg, Filipstad, Värmland, Sweden [j]; Nic |  | | Report (volume) | | mineralization in the PlioceneQuaternary Calatrava Region (central Spain) 29 43 81 91 105 117 123 139...lacustrine formation in a Tertiary continental-volcanic province. The ores (braunite, pyrolusite) interfinger with...the West African craton (Ghana, Ivory Coast, Burkina Faso, Mali, Eastern Liberia, Guinea) is unique among...intracontinental rift; Mn Tambao, Burkina carbonate in black shale in Faso transition zone between volcanic...Para), G a b o n (Moanda), Ghana, Ivory Coast, Burkina Faso, Eastern Liberia, and Mexico (Molango); smaller |  | | Report (volume) | | Gordon P. Eaton, Director Published in the Central Region, Denver, Colorado Manuscript approved for publication...Grupo Roraima e Interpretation Petrologica en la Region del Noreste del Parque Nacional Canaima, Estado...and Petrologic Interpretation in the Northeast Region of Canaima National Park, Estado Bolivar, Venezuela)............... 5 Granitic rocks of the Parguaza province and their equivalents...........................rapikivi texture is characteristic of the Parguaza province. Quartz veins, pegmatite, and greisen in the Parguaza |
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