 | Dekoninck, A., Bernard, A., Barbarand, J., Saint-Bezar, B., Missenard, Y., Lepretre, R., Saddiqi, O., Yans, J. (2016) Detailed mineralogy and petrology of manganese oxyhydroxide deposits of the Imini district (Morocco) Mineralium Deposita, 51 (1) 13-23 doi:10.1007/s00126-015-0590-3 | Journal (article/letter/editorial) | | manganese oxyhydroxide deposits of the Imini district (Morocco) A. Dekoninck 1 & A. Bernard 2 & J. Barbarand...Cenomanian-Turonian dolostone of the Imini district (south of the High Atlas, Morocco) displays a high Mn content...to the occurrence of pyrolusite, cryptomelane, hollandite sensu stricto, coronadite, romanechite, and lithiophorite...fabric (dolomite micrite and dolomite rhombs) by hollandite group minerals leading to a textural conservation...Pyrolusite is the main Mn oxide observed in the Imini district during both early and late stages. The |  | | Journal (article/letter/editorial) | | "CenomanoTuronian" Formations in the Manganese District of Imini (Morocco) and their Relation to Ore Deposition JEAN..."Cenomano-Turonian"formations in the manganese district of Imini (Morocco) and their relation to ore deposition. In:...formation of the high-grade manganese ores in the Imini and Tasdremt district, south of the High Atlas....surrounding carbonates can be used for the exploration of Imini-type manganese deposits. Introduction During the...subsiding basin in the area of the present High Atlas Mountain Range in Morocco, was invaded by both the |  | Verhaert, Michèle, Gautheron, Cécile, Dekoninck, Augustin, Vennemann, Torsten, Pinna-Jamme, Rosella, Mouttaqi, Abdellah, Yans, Johan (2022) Unravelling the Temporal and Chemical Evolution of a Mineralizing Fluid in Karst-Hosted Deposits: A Record from Goethite in the High Atlas Foreland (Morocco) Minerals, 12 (9) 1151 doi:10.3390/min12091151 | Journal (article/letter/editorial) | | Record from Goethite in the High Atlas Foreland (Morocco) Michèle Verhaert 1,2 , Cécile Gautheron 2 , Augustin...Record from Goethite in the High Atlas Foreland (Morocco). Minerals 2022, 12, 1151. https://doi.org/ Institute...Mines, Avenue Moulay Hassan 5, BP 99, Rabat 10000, Morocco Correspondence: augustin.dekoninck@unamur.be Abstract:...pure goethite formed in the Imini karst-hosted Mn district (High Atlas, Morocco) were examined in detail...stable isotope; δD; δ18 O; manganese; Imini; anti-atlas; Morocco 10.3390/min12091151 Academic Editor: |  | | Journal (article/letter/editorial) | | Model for the Origin of the Imini ManganeseDeposit(Cretaceous)of Morocco ERIC R. FORCE,WILLIAM BACK,ELLIOTT...Arizona85287 Abstract The Imini deposit,just southof the AtlasMountainsof Morocco,consists of three bedsof...Fe oxide) and dolomite matrix and pyrolusite-hollandite-calcite cement.The ore, solution-collapse breccia...precursorcarbonates, (2) dolomite-janggunite, and(3) hollandite-pyrolusite-chert-calcite. Diagenesisprobablyoccurredduringthe...mixingzone,where it precipitated. Descriptionof the Imini ManganeseDeposit Objective of Study SHALLOW-MARINE |  | | Journal (article/letter/editorial) | | Cave-Fill Manganese-Lead-Barium Deposits of Imini, Morocco J. GUTZMER†, N. J. BEUKES, Paleoproterozoic...Sciences and Techniques, BP 523, Beni Mellal, Morocco AND J. MUKHOPADHYAY Paleoproterozoic Mineralization...important high-grade manganese ores of the Imini district, Morocco, are exceptional because of their unusually...the three strata-bound manganese orebodies of the Imini district formed in a laterally extensive karst cave...migrated from the elevated regions of the Anti Atlas region into the exposed carbonate succession. Alkali feldspar-rich |  | | Catalog/List | | small damage on one central Barytes . 9x7 Mibladen Morocco £70 4 VISHNEVITE slightly pale blue, small massive...flat calcite-- attractive piece 6x4. Whitesmith Mine Stontian Scotland £25 7 ElJDIAL YTE rich red masses...covering all over the top surface 4x3cm Cassagna Mine, Ne Liguria Italy £ 25 14 STRONTIO-ORTHO JOAQU1N1TE...pinkish micro crystals on Boracite crystals Boulby mine Loftus Yorkshire 3x2cm £18 16 PRICEITE hard white...orange crystal sections on lx2cm surface Molinello Mine, Val Graveglia Italy £8 18 NATIVE COPPER a cleaned |  | | Book | | of Earth Sciences Mohammed Ist University Oujda Morocco ISSN 2365-0559 Mineral Resource Reviews ISBN 978-3-319-31731-1...data on diverse types of metallic deposits in Morocco, Algeria, Tunisia, Mali, Mauritania, Egypt, Sudan...the setting and origin of major deposits in the region, together with information on tonnages and grades...lead-zinc-silver deposits of the Tighza district of Morocco, proposing links to granite-related porphyry and...Zgounder epithermal silver-mercury deposit of Morocco, providing evidence for a genetic tie to Neoproterozoic |  | Garnit, Hechmi, Kraemer, Dennis, Bouhlel, Salah, Davoli, Mariano, Barca, Donatella (2020) Manganese ores in Tunisia: Genetic constraints from trace element geochemistry and mineralogy. Ore Geology Reviews, 120. 103451 doi:10.1016/j.oregeorev.2020.103451 | Journal (article/letter/editorial) | | 36 context), the Mn ores (stage 1 romanechite-hollandite) occur as porosity and/or 37 microfracture...detritus in the Mn ore. Minor Mn ores (cryptomelane, hollandite) occurring as duricrust and 44 fracture filling...layers. The stratabound 52 Mn ores (stage 1 hollandite and stage 2 romanechite-coronadite) in the Jebel...(Fan 89 and Yang, 1999). 90 Northern Africa (Morocco, Algeria, Tunisia and Egypt) is noteworthy for...Africa (after Beukes et al., 2016). The Imini district 94 (Morocco) is considered as the economically most |  | | Journal (article/letter/editorial) | | determinethe mineralsdefinitely. In theseveins,hollandite,psilomelane, cryptomelane, For manyyears,the...carbonate;rarely, it results from Table 1, DFH-169). In this mine, somelayers m chocolate-brown plumo• supergene alterationof...manganit•, overlain by • layer of barite, •egaunee area, Marquette Range, •ichiga,. The specimen is ten...areas of rhodochrosite wi• drusy cavities, New Ross mine, Lunenburg, Nova Scoti The specimen is ten centimeters...percent;andcopperis lower. Smallamounts the Club House mine, Arkansas, in which such of cobalt,nickel, and thallium |  | | Journal (article/letter/editorial) | | Mn-bearing phases are the same, namely pyrolusite and hollandite. The deposits differ in the presence of accessory...18±0.6 Ma old (Oudet et al., 2010; Fig. 3a). The area is characterized by a volcanic– sedimentary succession...further two types of Mn ore : 1) in the La Piramide area, Mn mineralization occurs within a welded ignimbrite...are the main gangue minerals; 2) in the Cala Fico area, the Mn minerals (VH3 subgroup) are hosted within...Sardinian Mn-accumulations, in particular, consist of hollandite, cryptomelane and coronadite, which have very |  | | Journal (article/letter/editorial) | | "volcanogene sedimentaire"by French geologistsworking in Morocco. Since then, other names,suchas "exhalative sedimentaire...thickerbedof tuff, and,in the central part of the Lucifer mine,the baseof the bed of oxideslies near the baseof...The manganesecontentof shipmentsfrom the Lucifer mine commonly rangesfrom 48 to 52 percent,the contentof...and the lead contentfrom 0 to 0.23 percent. In the area that includesthe two districts,there appearsto be...about70 mileslong that extendseastwardacrossOriente province(24, 45, 32). Althoughthe exploreddepositshave |  | 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...phases have been identified in the Alpi Apuane region. A first compression phase (Di ), at about 27 Ma...manganiferous outcrops of the BSFm were found in the area of Monte Corchia (Fig. la). Their stratigraphies...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 |  | | Journal (article/letter/editorial) | | contain the mineral assemblage braunite-bixbyite-hollandite-hausmannite-jacobsite-vredenburgite where some... 1965) FEITKNECHTITE PYROCHROITE Mn(OH)2 HOLLANDITE BoR8016 i R=Mn 4+MAINLY, ALSO Mn 2+,Fe, Co (RICHMOND...Ward mine, Dona Ana County,Black Diadepositsdiscussed above, rhodochrosite, generally mond mine, Grand...rhodonite Tennessee, Viola, Oklahomaand Big Muddy Mine, partin theepithermal Iron County,Missouri(HewettandFleischer...MANGANITE, Sedimentary Deposits of Manganese HAMBRIGHT MINE, CLEARELAND DTAND TENNESSEE VIOLA, OKLAHOMA,BIG |  | | Journal (article/letter/editorial) | | cuirass. In the group cryptomelane, coronadite, hollandite the ratio: (Ba, K, Pb)/H20 equals generaly 1...cryptomelane and higher temperature for coronadite and hollandite. Optical properties of these oxides seem to be...(1931) tr6s souvent associde aux psilom61anes. La hollandite, la cryptomdlane, et la coronadite forment une...qui a pour formule A R s O a6 (A = Ba pour la hollandite; K pour la cryptom61ane; Pb pour la coronadite)...Fe20 3 A120 3 CaO PbO HaO Na/O SiO 2 11 Maroc a Imini 12 Bou T a z o u l t b 13 (Arizona) b Clifton |  | | Journal (article/letter/editorial) | | (Gulbrandsenand Reeser, 1969); the Upper Cretaceous of Imini, manganese deposit •noX•C• •.•"•-'-•'•---••"•...transgressive-regressive cycle.Insetsapply to Morocco (Stamm and Thein, 1982; Force et al., 1986), and...TUR0NIAN •:•.,.. re<...•.... ,:•. • ::•• Imlm, Morocco CENOMANIAN ••. .•;•==i•i .•=i! ;•=• Groote Eylandt...Cenomanian-Turonian carbonatesof Morocco,fromStammandThein (1982). I = the Imini district,T = the coevalrea...ageform a largedepositin Hidalgoexposed over an area 20 by 50 km. The best publishedde- 02 zone 2O |  | | Book | | 2. Tropical Weathering Crusts 2.2.1. Model Test Area: Groote Eylandt Deposit, North Australia 2.2.1.1...of Genesis 2.2.1.11. Conclusion 2.2.2. Model Test Area: Moanda Deposit, Gabon, West Africa 2.2.2.1. Introduction...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...Formation Manganese Ore Deposits of North Africa: Imini, Morocco 3.4.1. Geological Setting 3.4.2. Alterations |  | | Journal (article/letter/editorial) | | Cryptomelane-KMn2±Mns -r016 . 2H20 _16. 2H 2O Hollandite --,.-BaMn 2±Mng 4+ n Coronadite PbMn 2+Mng 4÷016...2+)2Mn5'1- 012 - 4H 20 FIGURE 1. Hausmannite.Manganese mine Boz Nam, Ardishan, central Persia. Lammellar twining...hetairolite. Samples were examined from the Wolfton mine, 56 Diagnosis. Only observed in few deposits....most are not. FIGURE 2. Vredenburgite. Manganese mine Kodur, Vizagapatan, India. "Vredenburgite" composed...pattern. Material was investigated from Sagamore mine, Cayuna Range, and Hammereisenbach, Schwarzwald; |  | Dekoninck, Augustin, Monié, Patrick, Blockmans, Sabine, Hatert, Frédéric, Rochez, Gaëtan, Yans, Johan (2019) Genesis and 40Ar/39Ar dating of K-Mn oxides from the Stavelot Massif (Ardenne, Belgium): Insights into Oligocene to Pliocene weathering periods in Western Europe. Ore Geology Reviews, 115. 103191 doi:10.1016/j.oregeorev.2019.103191 | Journal (article/letter/editorial) | | locations expose the Fe-Mnbearing rocks: the Chevron area to the north is located at an altitude of 230–380...the Salmchâteau area, where weathering conditions are stronger than in the Chevron area because of the...the Salmchâteau area and a carbonate-hosted sedimentary deposit in the Chevron area. Weathering deposits...condition generally met in weathered Mn-rich rocks. Hollandite group minerals [(K,Ba,Pb,Na)Mn8O16] (Biagioni...cryptomelane cryptomelane hollandite Romanèche mine Romanèche mine Romanèche mine Romanèche mine Transinnes quarry |  | | Book (edition) | | strong red Stilleite Mottramite Acanthite Hollandite mosaic and polysynthetic Crednerite yes Cinnabar... 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...(greenish grey; arg); Monte Narba Mine, San Vito, Cagliari Province, Sardinia, Italy; PPL B Same sample |  | | Journal (article/letter/editorial) | | from an aggregate of plates from Rengersdorf. region. Samples from the Buruktal, Shcherbakov, and Kempirsai...of lithio phorite from the Moa deposit (Ovente Province, Cuba) and Co-Ni-asbolan and Co-Ni-lithiophorite...intergrowths with cryptomelane (Fig. 9). In the region of Groot Eylandt (Australia), lithiophorite is...deposit, southern Urals, where it is accompanied by hollandite, cryptomelane, and todorokite. In lateritic chemogenic...solution from the schists is possible. In the Imini deposit, Morocco, the ores of which are restricted to Cenomanian-Turonian |  | 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) | | deposits and associated rocks of Sikkin-Darjeeling region eastern Himalaya, India. He worked as a geologist...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 |  | | Journal (article/letter/editorial) | | 1984; Ponupo and Sabanilla Districts, Oriente Province, Cuba, Simons and Straczek, 1958; Sokolova, 1974;...et al., 1950; Hewett et al., 1956, 1961; Huelva Province, Spain and Portugal, Ddprez and Soler, 1971; Strauss...deposited in deep water at a continental margin in a region of oceanic upwelling. Hein and Koski (1987) stressed...manganese deposits. Inset shows location of study area in India (Chaudhuri et al., 1989). 1987), the Mn-oxide...diagenesis (Montagne Noir, France, Devonian; Oriente Province, Cuba, Cretaceous; Roy, 1981). However, the majority |  | | Book (volume) | | of the Great Lakes region (Canada and the USA), Venezuela, Brazil, Hamersley area of Australia, Krivoy...metal 1,800-m.y.-old pegmatites of the White-Sea region and coeval mica pegmatites of the Mama Belt (Siberia)...parts of platforms, for example, in Timan-Pechora region. They are composed of thick sedimentary-volcanogenic...Canada, and, probably, the deposits of the Kusa area in the Urals. North America's massive sulphide deposits...as, for example, Altay-Sayany region of the Soviet Union or Coastal region of Norway and Great Britain) |  | | Report (volume) | | J. K. Manganese ores of the GhoriajhorMonmunda area, Sundergarh District, Orissa, India: geochemical...mineralization in the PlioceneQuaternary Calatrava Region (central Spain) 29 43 81 91 105 117 123 139...Someya. They produced a database of deposits in the area, through which they identify nodule-setting associations...papers. In the Antarctic, Rey et al. identified an area of redundant hot springs and fumaroles. Enrichments...the marine sediments of Deception Island show the area as an exploration target for iron-manganese mineralization |  | | Book | | Geochemistry Petrography Vertical Sequence Nikopol Morocco Deposits associated with iron-formations Manganese...PART I. 11 IRON-FoRMATIONS Almost every large area of Precambrian rocks contains iron-formation. Deposits...this system (Fig. 24) shows a vanishingly small region of stability for siderite, indicating that the...1) have any application here. This is an exciting area of study of IF, and a small investment of effort...mesobands can be correlated over most of the outcrop area of the Hamersley, some 50,000 square kilometers |
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