	Diella, Valeria, Bocchio, Rosangela, Caucia, Franca, Marinoni, Nicoletta, Langone, Antonio, Possenti, Elena (2021) New Insights for Gem-Quality Mn-Bearing Diopside-Omphacite, Violane Variety, from Saint Marcel (Val D’Aosta, Italy): Its Trace Elements and Spectroscopic Characterization. Minerals, 11 (2) 171 doi:10.3390/min11020171	Journal (article/letter/editorial)
	Diopside-Omphacite, Violane Variety, from Saint Marcel (Val D’Aosta, Italy): Its Trace Elements and Spectroscopic...Diopside-Omphacite, Violane Variety, from Saint Marcel (Val D’Aosta, Italy): Its Trace Elements and Spectroscopic...Milan, Italy Department of Earth Sciences “Ardito Desio”, University of Milan, 20133 Milan, Italy; rosangela...Environmental Sciences, University of Pavia, 27100 Pavia, Italy; caucia@crystal.unipv.it National Research Council...Resources (IGG), Section of Pavia, 27100 Pavia, Italy; langone@igg.cnr.it National Research Council, Institute
	*(2023) Strontiomelane. Handbook of Mineralogy. Mineralogical Society of America*	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;...titanite, jadeite, strontiopiemontite. Distribution: From the Praborna Mn deposit, 5 km south of Saint-Marcel...Saint-Marcel, Aosta Valley, Italy. Name: The strontium analog of cryptomelane. The name alludes to the composition...the cryptomelane group from St. Marcel-Praborna, Aosta Valley, Italy. Can. Mineral., 37, 673-678. (2)
	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
	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...wakefieldite-(La) from the manganese and iron Glücksstern Mine associated with hausmannite Mn2+Mn3+ 2 O4 (Thuringia...suggested as representative of the protolith of the Praborna eclogite-facies metacherts (Tumiati et al. 2010)
	Tumiati, Simone, Martin, Silvana, Godard, Gaston (2010) Hydrothermal origin of manganese in the high-pressure ophiolite metasediments of Praborna ore deposit (Aosta Valley, Western Alps) European Journal of Mineralogy, 22 (4) 577-594 doi:10.1127/0935-1221/2010/0022-2035	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
	Perseil, Elena-Adriana, Smith, David C. (1995) Sb-rich titanite in the manganese concentrations at St. Marcel-Praborna, Aosta Valley, Italy: petrography and crystal-chemistry. Mineralogical Magazine, 59 (397) 717-734 doi:10.1180/minmag.1995.059.397.13	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...which was metamorphosed up to the eclogite facies (jadeite present) in Cretaceous times and was retrogressed...spessartine; futile; 'violan' (diopside-aegirine-jadeite); (e.g. de Lom, 1843; Dufrenoy, 1847; Mottana et
	Mottana, A., Rossi, G., Kracher, A., Kurat, G. (1979) Violan revisited: Mn-bearing omphacite and diopside. TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 26 (3). 187-201 doi:10.1007/bf01081845	Journal (article/letter/editorial)
	Universit)t di Bologna, Italy, C.N.R. Centro per la Cristallografia strutturale, Pavia, Italy, Naturhistorisches...from the manganese deposit of Praborna, near St. Marcel (Aosta Valley, Italy) occur in two different varieties:...("Violan") von der Manganlagerstiitte Praborna bei St. Marcel (Aosta-Tal, Italien) bilden entweder idiomorphe...in the Mn-orebody Praborna near St. Marcel in the Aosta Valley (northwestern Italy). It was originally...(1889) on a rose pyroxene occurring in the Swedish Mn-mine, Jakobsberg. Although believed initially to be a
	Perseil, E.-A., Blanc, P., Ohnenstetter, D. (2000) As-BEARING FLUORAPATITE IN MANGANIFEROUS DEPOSITS FROM ST. MARCEL - PRABORNA, VAL D'AOSTA, ITALY. The Canadian Mineralogist, 38 (1) 101-117 doi:10.2113/gscanmin.38.1.101	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
	Smith, David C., Perseil, Elena-Adriana (1997) Sb-rich rutile in the manganese concentrations at St. Marcel-Praborna, Aosta Valley, Italy: petrology and crystal-chemistry. Mineralogical Magazine, 61 (408) 655-669 doi:10.1180/minmag.1997.061.408.04	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
	Schreyer, Werner, Fransolet, André-Mathieu, Bernhardt, Heinz-Jürgen (2001) Hollandite–strontiomelane solid solutions coexisting with kanonaite and braunite in late quartz veins of the Stavelot Massif, Ardennes, Belgium. Contributions to Mineralogy and Petrology, 141 (5) 560-571 doi:10.1007/s004100100260	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
	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)
	manganian phengite, blue–purple manganian aegirine–jadeite, microcline, albite and quartz. In addition, it...electron images, many aegirine–jadeite grains appear patchy and show variable jadeite contents (Jd10–67). These...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...polytype; 8–15 vol%), blue–purple manganian aegirine– jadeite (2–10 vol%), braunite (5–8 vol%), hollandite (*2
	Hughes, Lewis, Burgess, Ray, Chavrit, Déborah, Pawley, Alison, Tartèse, Romain, Droop, Giles, Ballentine, Chris J., Lyon, Ian (2018) Halogen behaviour in subduction zones: Eclogite facies rocks from the Western and Central Alps. Geochimica et Cosmochimica Acta, 243. 1-23 doi:10.1016/j.gca.2018.09.024	Journal (article/letter/editorial)
	ocean floor origin for the complex. The St. Marcel valley (Fig. 1, locality 3) includes both oceanic and...gabbro to ultra-fine-grained zoisite + kyanite + jadeite + quartz, with a pervasive hydration event converting...been converted into ultra-fine-grained zoisite + jadeite + kyanite + quartz. DC25C is a coarse olivine gabbro...been converted to ultra-finegrained zoisite + jadeite + kyanite + quartz. 3.1.3. Metabasalts Samples...collected from Servette and Fontillon, near St. Marcel. They are representative of a suite of eclogitised
	Tartarotti, Paola, Martin, Silvana, Festa, Andrea, Balestro, Gianni (2021) Metasediments Covering Ophiolites in the HP Internal Belt of the Western Alps: Review of Tectono-Stratigraphic Successions and Constraints for the Alpine Evolution. Minerals, 11 (4) 411 doi:10.3390/min11040411	Journal (article/letter/editorial)
	Studi di Milano, Via Mangiagalli 34, 20133 Milano, Italy Dipartimento di Geoscienze, Università degli Studi...Studi di Padova, Via G. Gradenigo 6, 35131 Padova, Italy; silvana.martin@unipd.it Dipartimento di Scienze...di Torino, Via Valperga Caluso 35, 10125 Torino, Italy; andrea.festa@unito.it (A.F.); gianni.balestro@unito...particularly on the metaophiolites exposed in the Aosta Valley and in the Monviso Complex because, due to their...the Alps. In the northwestern Alps, as in the Aosta Valley for example, the high-pressure metamorphic peaks
	*Baldelli, C., Dal Piaz, G.V., Lombardo, B. (1985) Ophiolite eclogites from Verres, Val d'Aosta, Western Alps, Italy. Chemical Geology, 50 (1) 87-98 doi:10.1016/0009-2541(85)90113-5*	Journal (article/letter/editorial)
	ECLOGITES FROM VERRES, VAL D'AOSTA, WESTERN ALPS, ITALY C. B A L D E L L I 1, G.V. D A L P I A Z 1 and B...Istituto di Geologia, UniversiM di Padova, Padova (Italy) ~ Centro di Studio sui Problemi dell'Orogeno delle... (Consiglio Nazionale delle Ricerche), Torino (Italy) (Accepted for publication October 23, 1984) Abstract...eclogites from Verres, Val d'Aosta, Western Alps, Italy. In: D.C. Smith, G. Franz and D. Gebauer (Guest-Editors)...and Fe-rich layers of the Verres metagabbro in Italy, a large gabbro body belonging to the Piedmont ophiolite
	*(2023) Winchite. Handbook of Mineralogy. Mineralogical Society of America*	Report (issue)
	062 c = 5.300 X-ray Powder Pattern: Kajlidongri mine, India. (ICDD 20-1390). 2.699 (100), 8.40 (90),...4.01 0.16 Total 97.18 97.20 (1) Kajlidongri mine, India; by electron microprobe, total Fe as Fe2O...metamorphosed manganese deposits; in metabasalts of the jadeite-glaucophane and amphibolite-eclogite facies; in...diopside, plagioclase, apatite, tremolite (Ka jlidongri mine, India); omphacite, garnet, rutile, quartz, actinolite...California, USA). Distribution: In the Ka jlidongri mine, Jhabua district, Madhya Pradesh, India. From near
	Angiboust, S., Agard, P. (2010) Initial water budget: The key to detaching large volumes of eclogitized oceanic crust along the subduction channel?. Lithos, 120 (3) 453-474 doi:10.1016/j.lithos.2010.09.007	Journal (article/letter/editorial)
	from Saas-Fee area (Switzerland) to the Aosta valley (Italy; Fig. 1c), belongs to the internal Liguro–...2008). Serpentinite breccias from the southern Aosta valley (Mont Avic area) described by Tartarotti et...pseudomorphs in the whole ophiolite unit (Täsch valley: Bearth, 1966; Fry and Fyfe, 1971; Fry and Barnicoat...Valtournanche: Ernst and Dal Piaz, 1978; Saint-Marcel valley: Martin and Tartarotti, 1989). Complexity...Fig. 2 III) to ~60% in Mont Courquet slice (St-Marcel–Clavalité areas, Fig. 2 II; Table 1). In all studied
	*Lauf, Robert J. (2011) Collector's Guide to the Epidote Group. Rocks & Minerals, 86 (5) 444-457 doi:10.1080/00357529.2011.602297*	Journal (article/letter/editorial)
	found at Hashupa and at Alchuri, in the Shigar Valley, Northern Areas, Pakistan (Blauwet 2006). • Good...grains of pumpellyite, chlorite, clinozoisite, and jadeite. Microscopic analysis showed that clinozoisite-(Sr)...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
	Zanoni, D., Rebay, G., Spalla, M. I. (2016) Ocean floor and subduction record in the Zermatt-Saas rodingites, Valtournanche, Western Alps. Journal of Metamorphic Geology, 34 (9) 941-961 doi:10.1111/jmg.12215	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
	*Bousquet, Romain (2008) Metamorphic heterogeneities within a single HP unit: Overprint effect or metamorphic mix?. Lithos, 103 (1) 46-69 doi:10.1016/j.lithos.2007.09.010*	Journal (article/letter/editorial)
	clinopyroxene indicated a slight increase of the jadeite-content by nearly 50% (Fig. 6b) in comparison with...than 50% of jadeite while in eclogite-type II and III they contain slightly more jadeite. b) Chemistry...conditions such as (Fe, Mg)carpholite, glaucophane or jadeite, occurrences of garnet, chloritoid, phengite and...1995. Geology of the Internal Zone of the Grand Saint Bernard Nappe: a metamorphic Late Paleozoic volcano-sedimentary...volcano-sedimentary sequence in South-Western Aosta Valley (Western Alps). In: Lombardo, B. (Ed.), Studies
	Armbruster, Thomas, Bonazzi, Paola, Akasaka, Masahide, Bermanec, Vladimir, Chopin, Christian, Gieré, Reto, Heuss-Assbichler, Soraya, Liebscher, Axel, Menchetti, Silvio, Pan, Yuanming, Pasero, Marco (2006) Recommended nomenclature of epidote-group minerals. European Journal of Mineralogy, 18 (5) 551-567 doi:10.1127/0935-1221/2006/0018-0551	Journal (article/letter/editorial)
	dell’Università di Firenze, Via La Pira 4, I-50121 Firenze, Italy 3Department of Geoscience, Faculty of Science and...Università di Pisa, Via S. Maria 53, I-56126 Pisa, Italy Abstract: Epidote-group minerals are monoclinic...identity with epidote. Withamite from the Yamanaka mine (Japan) described by Yoshimura & Momoi (1964) is...Fouquéite = Piemontite (Bourg Clinozoisite (St. Marcel) d’Oisans) (Sri Lanka) SiO2 36.49 38.6 38.64 22... epidote-related mineral from Praborna mine, St. Marcel, Aosta Valley, in the Italian Western Alps, was
	Gianfagna, Antonio, Mazziotti-Tagliani, Simona, Croce, Alessandro, Allegrina, Mario, Rinaudo, Caterina (2014) As-RICH APATITE FROM MT. CALVARIO: CHARACTERIZATION BY ΜICRO-RAMAN SPECTROSCOPY. The Canadian Mineralogist, 52 (5) 799-808 doi:10.3749/canmin.1400039	Journal (article/letter/editorial)
	the volcanic region of Mt. Calvario (Mount Etna, Italy). The crystals, from both the unaltered lavas and...dike complex of Mt. Calvario (Mount Etna, Sicily, Italy). This geographic area is well known for the presence...fluorapatites in the manganiferous deposit of St. Marcel-Praborna (Italy) and related their formation to the late...standards were wollastonite (SiKα), orthoclase (KKα), jadeite (NaKα), celestine (SrKα), barite (SKα), glass standard...area of Biancavilla, Mount Etna (Eastern Sicily, Italy). Environmental Geology 47(6), 855–868. CARDILE
	*Curetti, N., Ferraris, G., Ivaldi, G. (2008) Correlation between crystallization pressure and structural parameters of phengites. American Mineralogist, 93 (2) 451-455 doi:10.2138/am.2008.2629*	Journal (article/letter/editorial)
	CNR, Via Valperga Caluso, 35, I-10125, Torino, Italy Abstract Linear correlations of lnP vs. the thickness...staurolite-zone south-alpine gneiss, Cermeledo, Italy. Mineralogical Magazine, 41, 400–402. Brigatti,...Compagnoni, R., Hirajima, T., and Rubbo, M. (2002) Jadeite with the CaEskola molecole from an ultra-high pressure...150 p. Doctorate thesis, University of Modena, Italy. Curetti, N. and Ivaldi, G. (2002) Characterization...152 p. Doctorate thesis, University of Modena, Italy. Godard, G. (1988) Petrology of some eclogites in
	Christy, A. G., Gatedal, K. (2005) Extremely Pb-rich rock-forming silicates including a beryllian scapolite and associated minerals in a skarn from Långban, Värmland, Sweden. Mineralogical Magazine, 69 (6) 995-1018 doi:10.1180/0026461056960304	Journal (article/letter/editorial)
	it is relatively common at the nearby Jakobsberg mine, another deposit of LaÊngban type (Holtstam and...signi®cant octahedral Al, and hence negligible jadeite component, consistent with the relatively low pressures...hyalophane and clinopyroxene are: (1) that some jadeite component exsolved on depressurization, or (2)...and Suzuki, Y (1996) RomeÂite from the Gozaisho mine, Iwaki, Japan. , , 155ÿ160. McSwiggen, P.L., Morey...and apuanite, 2 new minerals from the Apuan Alps, Italy. , , Êngban: the La Mines, their Minerals, Geology
	*(2007, January) Geonieuws* Vol. 32 (01) Mineralogische Kring Antwerpen**	Journal (issue)
	944-952 Mn-tourmaline crystals from island of Elnba (Italy) : growth history and growth marks * LAPIS 31(6)...MINERALOGIST 44(2), 04.06 305-322 Pre-columbian jadeite axes from Antigua, West Indies : description and...Lemanskiite, a new mineral species from the Abundancia mine, Chile * CANADIAN MINERALOGIST 44(3), 06.06 ...Orthoserpierite and schulenbergite from the Platosa mine, Durango, Mexico 14-15 Kopparbarg at 30 years ...associated secondary minerals from the Telfer gold mine, Western Australia 45-47 A curious calcite morphology
	Reinecke, Thomas (1986) Phase relationships of sursassite and other Mn-silicates in highly oxidized low-grade, high-pressure metamorphic rocks from Evvia and Andros islands, Greece. Contributions to Mineralogy and Petrology, 94 (1) 110-126 doi:10.1007/bf00371232	Journal (article/letter/editorial)
	lawsonite (_+ albite), pumpellyite, and aegirine-jadeite (Jad~ 15- 35)+ quartz (Bavay and Bavay 1980; Reinecke...central Andros, the presence of omphacite/aegirine-jadeite (Jad2o -,~o)+ quartz, deerite + magnetite + quartz...Woodstock, New Brunswick, Canada Ligurian Apennine, Italy Val d'Err, Graubfinden, Switzerland Southern Evvia...References Gran Paradiso Massif, French Alps Praborna, Aosta, Italy quartz,piemontite,spessartine, braunite...amphibolite-facies metamorphism Cignana Lake, Valtournanche, Italy Brezovica, Serbia, Yougoslavia Haast River, New

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Jadeite from Praborna Mine, Saint-Marcel, Aosta Valley, Italy

Jadeite from
Praborna Mine, Saint-Marcel, Aosta Valley, Italy