 | | 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) | | at the Praborna mine near Saint-Marcel, Val d’Aoste, Italy, and in the upper Maurienne Valley, France...France. They occur both in oxidised metachert with hematite and braunite (þ minor Mn-pyroxenoid and tirodite...with rhodonite, kutnahorite or rhodochrosite, and hematite. 3: Amphibolite-facies, Maharastra, India (Sastri...pyroxmangite, rhodochrosite, jacobsite, quartz and hematite. 7: Blueschist facies (>1.0 GPa, 450–500 C)...quartz, microcline, albite, biotite, epidote, hematite, titanite and zircon). 9: Ultrahigh-temperature |  | 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...(Mn2+Mn3+6SiO12), quartz, pyroxmangite (Mn2+SiO3), and minor hematite, omphacite, piemontite and spessartine-rich garnet...on this dataset and the observed assemblages at Praborna, thermodynamic calculations show that these mélange |  | | 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...MnO) collected by de Lom (1843) from the St. Marcel-Praborna locality. Fermor (1908) also mentioned 'greenovite'...electron microprobe on greenovites from St. Marcel-Praborna, Mottana and Griffin (1979) recorded Mn contents |  | Tumiati, Simone, Merlini, Marco, Godard, Gaston, Hanfland, Michael, Fumagalli, Patrizia (2020) Orthovanadate wakefieldite-(Ce) in symplectites replacing vanadium-bearing omphacite in the ultra-oxidized manganese deposit of Praborna (Aosta Valley, Western Italian Alps). American Mineralogist, 105 (8). 1242-1253 doi:10.2138/am-2020-7219 | Journal (article/letter/editorial) | | the ultra-oxidized manganese deposit of Praborna (Aosta Valley, Western Italian Alps) Simone Tumiati1...Studi di Milano, via Mangiagalli 34, 20133 Milano, Italy 2 Université de Paris, Institut de Physique du Globe...005)O4⸱nH2O has been found in metacherts from Praborna (Italian Alps) as micrometer-sized euhedral crystals...modeling suggest that the mineral, coexisting with hematite, Mn-rich epidote, and braunite, formed during...was discovered first as wakefieldite-(Y) in an hematite- and goethite-bearing pegmatite at Wakefield Lake |  | | 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...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...late stages of retrograde metamorphism at St. Marcel-Praborna, seems to be rather unusual. The presence of |  | Cenki-Tok, Bénédicte, Ragu, Alain, Armbruster, Thomas, Chopin, Christian, Medenbach, Olaf (2006) New Mn- and rare-earth-rich epidote-group minerals in metacherts: manganiandrosite-(Ce) and vanadoandrosite-(Ce) European Journal of Mineralogy, 18 (5) 569-582 doi:10.1127/0935-1221/2006/0018-0569 | Journal (article/letter/editorial) | | site; it occurs at the Praborna manganese mine, Saint-Marcel, Aosta valley, Italy, in a Mesozoic eclogite-facies...Mn-pyroxenoid, with minor calderite, spessartine, hematite and pyrophanite. The structural formula is A1[Mn2+0...The locality studied, the Praborna mine near Saint-Marcel, Val d’Aosta, Italy, belongs to the eclogite-facies...Paradiso massif at the upper end of the Maurienne Valley, France (Chopin, 1978), and on the north-eastern...latter magnificently developed near Praborna, at the Servette mine (Martin & Tartarotti, 1989)] points |  | | Journal (article/letter/editorial) | | been documented in the famous Saint-Marcel mine, Praborna, Aosta Valley, Italy (Perseil 1988), in the Falotta...braunite ores from Maritime Alps and Eastern Liguria, Italy (Cabella et al. 1995) and from the Sanbagawa metamorphic...the large cations, was described from the Saint-Marcel mine (Meisser et al. 1999). The occurrence of manganese...kanonaite (Kramm 1979). In an outcrop along the Salm Valley between SalmchaÃteau and Vielsalm, this paragenesis...limb of the steeply dipping syncline of the Salm Valley (Anten 1914, 1923). The deep-purple rocks form |  | | 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 |  | Cabella, Roberto, Basso, Riccardo, Lucchetti, Gabriella, Marescotti, Pietro, Martinelli, Alberto, Nayak, Virendra Kumar (2003) Squawcreekite-rutile solid solution from the Kajlidongri Mine (India) European Journal of Mineralogy, 15 (2) 427-433 doi:10.1127/0935-1221/2003/0015-0427 | Journal (article/letter/editorial) | | Squawcreekite-rutile solid solution from the Kajlidongri Mine (India) ROBERTO CABELLA1*, RICCARDO BASSO1, GABRIELLA...Università di Genova, Corso Europa 26, I-16132 Genova, Italy * Corresponding author, e-mail: cabella@dipteris...recognised in quartz veins from the Kajlidongri manganese mine District Jhabua, Madhya Pradesh (India): this finding...District (New Mexico, U.S.A), the Esperansa tin mine (Durango, Mexico), and the Olimpiada gold deposit...is Fe3+, Mn3+, Al). In rutile from St. Marcel-Praborna, Italy, Smith & Perseil (1997) recognised that |  | | Journal (article/letter/editorial) | | hausmannite; Fe-rich zones with magnetite and hematite) and silicate layers (spessartine, manganocummingtonite...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...et al. 1987; Fig. 1). In the upper part of the valley, the pre-Mesozoic crystalline rocks of the “Ensemble |  | | Report (issue) | | X-ray Powder Pattern: Praborna Mn deposit, Saint-Marcel, Val d’Aosta, Italy. [calculated pattern] 2...0.07 [1.45] 96.59 (1) Praborna Mn deposit, Saint-Marcel, Val d’Aosta, Italy; average of 4 electron microprobe...Tephroite, Mn-pyroxenoid, hematite, calderite; or spessartine, calderite, hematite, pyrophanite. Distribution:...Distribution: From the dumps of the Praborna Mn deposit, Saint-Marcel, Val d’Aosta, Italy, Name: The Ce analogue of |  | 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) | | 29–0.92Mn5.11–5.76)O16], barite and manganian hematite. Due to metamorphic recrystallization and deformation...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...braunite (5–8 vol%), hollandite (*2 vol%), manganian hematite (\1 vol%), albite (*3 vol%), microcline (1–5 vol%)...phengite ? aegirine–jadeite ? braunite ? hollandite ? hematite ? aragonite (now transformed to calcite) ? microcline |  | | Catalog/List | | grey mass with Actinolite, large 2x3 inch ..Bastnas Mine Sweden £30 12. SCAPOLITE completely clear single...small quartz crystals, possibly some with faces. lxl Mine, Washoe County Nevada USA £30 Olinghouse ......on lxl inch matrix Arizona USA £18 · Inspiration mine, Gila County, 21. HAMBERGITE chalky-white crystalline...tabular twinned crystal about 1cm size ( Telino Mine, Linopolis, Minas Gerais Brazil) £25 . 1'fa Be PO4...TITANITE variety "Greenovite" (Praborna Mine, St Marcel, Aosta Italy) pink vein about 3mm wide and 3cm |  | | Journal (article/letter/editorial) | | hollandite, was recently reported from the Praborna Mn deposit, Italy (Meisser et al. 1999). This occurrence...second report following the type crystal from Woods mine, Australia (Kawachi et al. 1996). Aggregates of...HOLLANDITE- AND PIEMONTITE-GROUP MINERALS quartz, hematite, dolomite, and calcite with subordinate amounts...piemontite, dolomite, calcite, muscovite, and hematite with titanite and apatite as accessory minerals...contents are <1.0 and <0.08 wt%, respectively. Hematite contains up to 1.9 and 0.3 wt% Mn2O3 and TiO2 |  | 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...hydrothermal ores from Vagli, Apuan Alps, Tuscany, Italy, on the basis of chemical and X-ray diffraction...oxides, crystal structure, Apuan Alps, Tuscany, Italy. describe a phase having Ba2þ as dominant tunnel...represented by braunite-bearing layers within hematite-rich cherts, belonging to the ‘‘Diaspri di Monte |  | | Journal (article/letter/editorial) | | that was investigated is found at the Byrud emerald mine, in Eidsvoll, Akershus, southern Norway. The mineralization...mineral is transparent in small crystals and has hematite, chondrodite, augite and fluorite inclusions in...mineral was found in small cavities in an altered hematite-rich xenolith in an abandoned trachyandesite quarry...1.6 Ma ago. It is associated with titaniferous hematite, augite, phlogopite, enstatite, feldspar, tridymite...pegmatite in the upper reaches of the Petreliusa River valley, Khibiny alkaline massif, Kola Peninsula Russia |  | | Journal (article/letter/editorial) | | chemistry of roméite from the type locality Praborna (Italy), from Massiac (France), and from four newly...discovered by Damour (1841) in the Praborna mine (Piemont, Italy) and named in honor of French mineralogist...mineralogist Romé de l’Isle (1736–1790). Although the Praborna roméite was originally described as CaSb32 O4...description: (1) Sample MGL37726 from Praborna, Piemont, Italy. (2) Grain FI10/c, Fianel, Val Ferrera...Na2O CaO MnO UO2 PbO F OH )(OH,F) 2 Fianel 15 1 Praborna 7 Analysis N° Deposit Pointsb Table 2 Selected |  | | 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) | | As and V, for example, were incorporated into hematite in Fe-rich ores, whereas in Mn-rich ores they...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 |  | | 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 |  | Roth, Philippe, Meisser, Nicolas, Nestola, Fabrizio, Škoda, Radek, Cámara, Fernando, Bosi, Ferdinando, Ciriotti, Marco E., Hålenius, Ulf, Schnyder, Cédric, Bracco, Roberto (2020) Rüdlingerite, Mn2+2V5+As5+O7·2H2O, a New Species Isostructural with Fianelite. Minerals, 10 (11) 960 doi:10.3390/min10110960 | Journal (article/letter/editorial) | | Università degli studi di Padova, 35131 Padova, Italy; fabrizio.nestola@unipd.it Department of Geological...Università degli Studi di Milano, 20133 Milano, Italy; fernando.camara@unimi.it Dipartimento di Scienze...Terra, Sapienza Università di Roma, 00185 Rome, Italy; ferdinando.bosi@uniroma1.it CNR–Istituto di Geoscienze...Geoscienze e Georisorse, UOS Roma, 00185 Roma, Italy Dipartimento di Scienze della Terra, Università degli...degli Studi di Torino, 10125 Torino, Italy; marco.ciriotti@unito.it Associazione Micromineralogica Italiana |  | | 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 |  | | Journal (article/letter/editorial) | | Studi di Milano, Via Mangiagalli 34, 20133 Milano, Italy (davide.zanoni@unimi.it) 2 Dipartimento di Scienze...degli Studi di Pavia, Via Ferrata 1, 27100 Pavia, Italy 1 Short title: OCEAN FLOOR TO SUBDUCTION RECORD...oceanic Zermatt-Saas Zone (Western Alps, northwestern Italy) during Alpine subduction. Rodingites occur in the...upper Valtournanche (Val d’Aosta, northwestern Italy), consists of high-pressure/ultra-highpressure (HP/UHP)...et al., 2009) and, south of the Aosta-Ranzola fault (St. Marcel valley), 2.1 ± 0.3 GPa and 550 ± 60 °C |  | | 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