 | | Report (issue) | | 9.88(1) X-ray Powder Pattern: Praborna Mn deposit, Aosta Valley, Italy. 3.15 (100), 3.13 (80), 2.409...83 0.17 1.39 12.77 97.80 (1) Praborna Mn deposit, Aosta Valley, Italy; electron microprobe analysis;...a series with cryptomelane and hollandite. Mineral Group: Hollandite supergroup, coronadite group. Occurrence:...seafloor hydrothermal origin. Association: Braunite, hollandite, cryptomelane, fluorapatite, titanite, jadeite...Distribution: From the Praborna Mn deposit, 5 km south of Saint-Marcel, Aosta Valley, Italy. Name: The strontium |  | | Journal (article/letter/editorial) | | high-pressure ophiolite metasediments of Praborna ore deposit (Aosta Valley, Western Alps) SIMONE TUMIATI1,*...Studi di Milano, via Botticelli 23, 20133 Milano, Italy *Corresponding author, e-mail: simone.tumiati@unimi...degli Studi di Padova, via Giotto 1, 35137 Padova, Italy 3 Equipe Géobiosphère actuelle et primitive; Institut...deposit of Praborna crops out in the Zermatt-Saas unit of the Western Alps, in the St. Marcel valley. It represents...to the bulk-rock chemistry. Compared to shales, Praborna is enriched in Mn (up to 38.7 wt% Mn2O3) and in |  | | Journal (article/letter/editorial) | | AndreÂ-Mathieu Fransolet Heinz-JuÈrgen Bernhardt Hollandite±strontiomelane solid solutions coexisting with...``viridine''-bearing phyllites at Le Coreux, hollandite, ideally BaMn8O16, was discovered for the ®rst...end member MnAlSiO5 ever found worldwide. The hollandite-type minerals are intimately intergrown with...all K is located in muscovite and none in the hollandite phase despite the existence of the end member...Similarly, nearly all Na is in albite and not in hollandite (no NaMn8O16=manjiroite component). Nearly all |  | | Journal (article/letter/editorial) | | les oxydes mangan6sif6res du gisement de St. Marcel-Praborna-V. Aoste, Italie E.A. Perseil Laboratoire...piemontite-bearing horizons of the St. Marcel Mine, Praborna (Aosta Valley, Italy). These oxides are always associated...that these oxides belong to the cryptomelane-hollandite-coronadite isostructural series. They represent...des niveaux fi pi6montite du gisement de St. Marcel-Praborna (Val d'Aoste, Italie). Ces oxydes sont toujours...fi la s6rie isostructurale de la cryptom61ane-hollandite-coronadite. Ils repr6sentent des termes interm6diaires |  | | Journal (article/letter/editorial) | | the manganese concentrations St. Marcel-Praborna, Aosta Valley, Italy: petrology and crystal-chemistry...0.2 Sb 5§ per O = 2) from St. Marcel-Praborna in the Aosta Valley, Italy, were re-examined. These compositions...subrectangular tunnels in the analogous cryptomelane/hollandite/priderite, romandchite and todorokite mineral...rom6ite, crystal-chemistry, petrology, St. Marcel-Praborna, Italy. Introduction Tins article examines in...manganese concentrations at St. Marcel-Praborna, Val d'Aosta, Italy. A substantial bibliography concerning |  | | Journal (article/letter/editorial) | | manganese concentrations at St. Marcel-Praborna, Aosta Valley, Italy: petrography and crystal-chemistry...manganese concentrations at St. Marcel-Praborna in the Aosta Valley, Italy. These titanites arc chemically...titanite, crystal-chemistry, petrography, St. Marcel-Praborna, Italy. Introduction THE manganese concentrations...birnessite; braunite; cryptomelane; hausmannite; hollandite; manganite; piemontite; priderite; pyrolusite;...MnO) collected by de Lom (1843) from the St. Marcel-Praborna locality. Fermor (1908) also mentioned 'greenovite' |  | | Journal (article/letter/editorial) | | online October 2012 Nomenclature tunings in the hollandite supergroup CRISTIAN BIAGIONI, CARMEN CAPALBO...I-56126 Pisa, Italy *Corresponding author, e-mail: pasero@dst.unipi.it Abstract: The hollandite supergroup...¼ Mn, Ti; M3þ ¼ Mn, Fe, Cr, V; M2þ ¼ Fe. The hollandite supergroup is divided into two groups depending...guidelines, our main actions have been the following: hollandite is redefined as the Ba-Mn3þ end-member of the...the coronadite group; concurrently, type hollandite is redefined as ferrihollandite, a new name to denote |  | Altherr, Rainer, Soder, Christian, Panienka, Sandra, Peters, Daniel, Meyer, Hans-Peter (2013) Pink manganian phengite in a high P/T meta-conglomerate from northern Syros (Cyclades, Greece) Contributions to Mineralogy and Petrology, 166 (5) 1323-1334 doi:10.1007/s00410-013-0929-7 | Journal (article/letter/editorial) | | aggregates (up to *1.5 cm in diameter) that include hollandite [(Ba0.98–1.02K\0.01Na\0.02Ca\0.03) 3? 4? (Mn3...concentrations of Co, Ni and Zn are less than 0.09 wt%. Hollandite shows even lower concentrations of these elements...component. Keywords Manganian phengite Braunite Hollandite High-pressure metamorphism Syros Greece...is from the Praborna mine near St. Marcel, 123 Contrib Mineral Petrol Val d’Aoste, Italy (e.g., Penfield...Corsaglia near Ponte dei Gorrazzi in Piedmont, Italy (Cabella et al. 1992). Here, we describe a new occurrence |  | Tumiati, Simone, Godard, Gaston, Martin, Silvana, Malaspina, Nadia, Poli, Stefano (2015) Ultra-oxidized rocks in subduction mélanges? Decoupling between oxygen fugacity and oxygen availability in a Mn-rich metasomatic environment. Lithos, 226. 116-130 doi:10.1016/j.lithos.2014.12.008 | Journal (article/letter/editorial) | | Milano, via b NU Mangiagalli 34, I-20133 Milano, Italy; simone.tumiati@unimi.it Institut de Physique du...degli Studi di Padova, via Giotto 1, 35137 Padova, Italy d Dipartimento di Scienze dell’Ambiente e del...Scienza 4, 20126 Milano, Italy CE ABSTRACT The manganese ore of Praborna (Italian Western Alps) is...on this dataset and the observed assemblages at Praborna, thermodynamic calculations show that these mélange...with care. From the study of mélange rocks at Praborna, the distribution of oxygen at subduction zones |  | | Journal (article/letter/editorial) | | Partitioning of Sr between coexisting minerals of the hollandite- and piemontite-groups in a quartz-rich schist...305-8567, Japan ABSTRACT Coexisting minerals of the hollandite-cryptomelane series, piemontite-group, and a...Japan. Strontium, Ba, K, and Pb contents of the hollandite-cryptomelane minerals are 0.00–0.42, 0.07–0.99...Distribution coefficients for Sr between the hollandite-cryptomelane series and the piemontite-group...piemontite-group minerals are up to 20, implying that the hollandite-type structure with its large open tunnel is more |  | | Journal (article/letter/editorial) | | MANGANIFEROUS DEPOSITS FROM ST. MARCEL – PRABORNA, VAL D’AOSTA, ITALY ELENA-ADRIANA PERSEIL Laboratoire...manganiferous deposit at the St. Marcel – Praborna mine in the Val d’Aosta, Italy. Three types of fluorapatite...electron-microprobe analysis, arsenic, quencher, St. Marcel – Praborna, Italy. SOMMAIRE Nous décrivons d’importantes...concentrations manganésifères de la mine de St. Marcel – Praborna dans le Val d’Aoste, Italie. Trois types...effet d’inhibition de la luminescence, St. Marcel – Praborna, Italie. INTRODUCTION Arsenic-bearing apatite |  | | Journal (article/letter/editorial) | | birnessite, takanelite, nsutite–ramsdellite, hollandite, manganite, pyrolusite, cuprite and malachite...Birnessite, takanélite, nsutite–ramsdellite, hollandite, manganite, pyrolusite, cuprite et malachite...Ködnitz Valley, Eastern Alps; Abrecht (1990); Graubünden, Central Alps; Geiger (1948); Praborna and Val...grade (Gonzen, Val Graveglia) to eclogitic facies (Praborna). They developed complex assemblages of metamorphic...domain. The Turtmanntal, a tributary to the Rhone Valley in Canton Wallis, Western Switzerland, belongs |  | Biagioni, Cristian, Capalbo, Carmen, Lezzerini, Marco, Pasero, Marco (2014) Ferrihollandite, BaMn4+6Fe3+2O16, from Apuan Alps, Tuscany, Italy: description and crystal structure. European Journal of Mineralogy, 26 (1) 171-178 doi:10.1127/0935-1221/2013/0025-2353 | Journal (article/letter/editorial) | | Ferrihollandite, BaMn4þ6Fe3þ2O16, from Apuan Alps, Tuscany, Italy: description and crystal structure CRISTIAN BIAGIONI*...Università di Pisa, Via S. Maria 53, 56126 Pisa, Italy *Corresponding author, e-mail: biagioni@dst.unipi...nomenclature of tunnel oxides belonging to the hollandite supergroup led to the definition of a new end-member...ideally BaMn4þ6Fe3þ2O16. In particular, the type hollandite from Kajlidongri, Jhabua District, Madhya Pradesh...hydrothermal ores from Vagli, Apuan Alps, Tuscany, Italy, on the basis of chemical and X-ray diffraction |  | | Catalog/List | | flat calcite-- attractive piece 6x4. Whitesmith Mine Stontian Scotland £25 7 ElJDIAL YTE rich red masses...all over the top surface 4x3cm Cassagna Mine, Ne Liguria Italy £ 25 14 STRONTIO-ORTHO JOAQU1N1TE one yellow...pinkish micro crystals on Boracite crystals Boulby mine Loftus Yorkshire 3x2cm £18 16 PRICEITE hard white...crystal sections on lx2cm surface Molinello Mine, Val Graveglia Italy £8 18 NATIVE COPPER a cleaned piece 8x5cm...Braunite, Piemontite and quartz Praboma Mine, St Marcel ,Aosta Italy 3.5 x3cm £12 25 RHODIZlTE glass tube |  | Chukanov, Nikita V., Aksenov, Sergey M., Jančev, Simeon, Pekov, Igor V., Göttlicher, Jörg, Polekhovsky, Yury S., Rusakov, Vyacheslav S., Nelyubina, Yuliya V., Van, Konstantin V. (2016) A new mineral species ferricoronadite, Pb[Mn4+6(Fe3+,Mn3+)2]O16: mineralogical characterization, crystal chemistry and physical properties. Physics and Chemistry of Minerals, 43 (7) 503-514 doi:10.1007/s00269-016-0811-z | Journal (article/letter/editorial) | | Minerals Keywords New mineral · Ferricoronadite · Hollandite supergroup · Crystal structure · Mössbauer spectroscopy...Nežilovo · Pelagonian massif Introduction The hollandite supergroup includes 2 × 2 tunnel oxides with...bivalent octahedral cations in Mn4+-dominant hollandite-type compounds is questionable (see Pasero 2005)...2005). The ideal topological symmetry of hollandite-supergroup minerals is rutile-like and tetragonal...1986). According to the current nomenclature of hollandite-supergroup minerals (Biagioni et al. 2013), each |  | | Journal (article/letter/editorial) | | oxydes de manganese dans le gisement de St. Marcel-Praborna - V. Aoste, Italie E. A. Perseil Laboratoire...Paris Resumt. La braunite du gisement de St. Marcel-Praborna, dans le Val d'Aoste (Italie) prtsente un certain...et l'tvolution des oxydes mangantsifhres de St. Marcel sont des traits que l'on retrouve dans les oxydes...metamorphosed Mn ore-body at St. Marcel-Praborna Val d'Aosta, Italy, occurs in several textural forms...relationships and[ the evolution of the Mn-oxides of St. Marcel have the characteristics of oxides in those polymetallic |  | | Catalog/List | | with micro Sphalerite on 2x2 matrix Lers Malines Mine, Gard, France £20 4. BENTORITE a very rare, Cr containing...mineral as a single crystal like this £30 . Koksha Valley, Badakshan, Afganistan 7. SCOLECITE single terminated...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 |  | | Journal (article/letter/editorial) | | metasedimentary succession from southern Apennines (Italy): Genesis constraints T ⁎ Rosa Sinisia, , Giovanni...Basilicata, viale Ateneo Lucano 10, 85100 Potenza, Italy Dipartimento di Biologia, Ecologia e Scienze della...Calabria, via P. Bucci, 87036 Arcavacata di Rende, Italy A R T I C L E I N F O A B S T R A C T Keywords:...Apennines (at Mormanno site, Calabria-Lucania border, Italy). The mineralization mainly consists of three types...deposit from southern Apennines (at Mormanno site, Italy), extensively exploited until the 70s and here described |  | | Catalog/List | | GREENOCKITE 16 HILLEBRANDITE HIORTDAHLfTE ~~18 HOLLANDITE FORMULA _____________________ LOCATION , ...2H2O_______ _______________ Pale cream ___ Brosso ~ Mine ••••'■• ,ivrea,Italy__________________________________...Germany___ _____ 2 Na2Ca(Fe2+.Mg)5Si8Q22(OH)2 ' __ Praborna,Aosta,Italy________ ____________ _____ BaFe2+SI40io...--__- ___ -Fe2+23AI4(PO4)4(OH)6.2H2O_" _ Cordon Mine,Hamton,Ne^da,USA 2 2~ZT ~CdS_____ __________ ._______...LANGBANITE_______ _____ SanVenanzo.Orvieto,Umbria,Italy ____________ KAlSiO4 _____ Santa Barbara County |  | | Journal (article/letter/editorial) | | with intermediate members of the cryptomelane-hollandite isostructural series crosscut the braunite mineralization...the intermediate members of the cryptomelane-hollandite series and with the destabilization of the braunite...la s6rie isostructurale de la cryptom~lane- hollandite recoupent la min6ralisation de braunite et indiquent...de la s6rie isostructurale de la cryptom~lane-hollandite, ainsi que la d6stabilisation de la braunite...interm4diaires de la s6rie isostructurale cryptom61ane-hollandite, et l'association de todorokite-birnessite. |  | | Journal (article/letter/editorial) | | found at Hashupa and at Alchuri, in the Shigar Valley, Northern Areas, Pakistan (Blauwet 2006). • Good...striated epidotes in matrix, from the Calumet iron mine, Colorado. Epidote was described in 1801 by Haüy...collectors. Within the United States, the Green Monster mine, Prince of Wales Island, Alaska, has yielded superb...quartz (Leavens and Thomssen 1977); the Calumet iron mine, Chaffee County, Colorado, is a notable locale for...quartz and yellow-green titanite, from the Capelinha mine, Minas Gerais, Brazil, are relatively inexpensive |  | | Journal (article/letter/editorial) | | +-bearing Na-pyroxene (violan), carbonate, quartz, hollandite, and hematite. Zoned grains generally exhibit...§ piemontites from braunite quartzites at Praborna, Italy, contain up to about 33 mole % Mn 3§ in early...piemontite and thulite has been done. At the idle Mn-mine of Vitali, Andros island, Greece, piemontites of...Tremolite Cymrite Celsian Calcite Braunite Hematite Hollandite Titanite Rutile + + + + + + + + + + + + +...and minor tremolite, braunite, thulite, barite, hollandite, titanite, hematite, and apatite. At the upper |  | | Journal (article/letter/editorial) | | Oberhalbstein, Switzerland (Geiger 1948), at Praborna in the Aosta Valley, Italy (Martin-Vernizzi 1984, Perseil 1991)...1991), and in the Ligurian Alps, Italy (Cortesogno et al. 1979), in other chert-hosted deposits in the...1993), in sandstone-hosted deposits at the Kombat mine, Namibia (Dunn 1991); and in carbonate-hosted deposits...metamorphism. REGIONAL GEOLOGY Val Ferrera, a high valley with the source of a tributary to the Rhine in...Fianel 3: Starlera 4: Bergwiesen SP Val Ferrera Italy Thusis 3 2 1 SB 4? SP ? ? S A 20 km ? |  | | Catalog/List | | pinkish fine grained mass in Calcite.(Dark Star Mine,Ravalli County, Montana USA) 1 x 14 £2.50 1x1 £4...guite rich black masses in matrix (Union Carbide Mine, Wilson Springs Garland County, Arkansas USA) 1x1...fairly sparse, green crusts on matrix. (San Miguel Mine Moctezuma Mexico) 1cm piece £ 5 5mm £3 WITH UNUSUAL...CO/3 0 Quite rich yellow crusts on matrix. (Outpost Mine, San Domingo Wash Maricopa County Arizona) Ixliins...MINERAL !I dark red micro's on matrix. (Getchell Mine,Humboldt Co . Nevada USA) 5mm £4 up to 1.5cm £7 |  | | Catalog/List | | lx2 £2 lxl£3 2x2£12 lx2£5 lxl £1 ----· Hawkswood Mine, Cornwall ANDALUSITE Cabracao, Minl10, Portugal...Andalucia Spain. Type Location New East Whcal Russell mine, Devon ,England 140 grey bleby small botryoidal..._lx2_ _80 _ _____ _,o 1129 ALMANDINE Braslad iron Mine near Arendal ,Norway Unknown location I 1 63 □a...lxl£2 2x3£6 3x4£8 feldspar ALSTONITE Fallowfield Mine, Northumberland ANDRADITE Grua. Oppland Norway 5...2x3£15 Gamet ½" £3 ALTHAUSITE ANDRADITE Benallt Mine,Lleyn ,Wales Modum, Buskerud,Norway 975 44 Brown-purple |
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Praborna Mine, Saint-Marcel, Aosta Valley, Italy