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Prabornaz Mine (Praborna Mine), Saint-Marcel, Aosta Valley, Italyi
Regional Level Types
Prabornaz Mine (Praborna Mine)Mine
Saint-Marcel- not defined -
Aosta ValleyAutonomous Region
ItalyCountry

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Name(s) in local language(s):Miniera di Prabornaz, Saint-Marcel, Valle d'Aosta, Italia
Latitude & Longitude (WGS84): 45° 40' 45'' North , 7° 26' 57'' East
Latitude & Longitude (decimal): 45.67944,7.44944
GeoHash:G#: u0j7ce8w0
Locality type:Mine
Köppen climate type:ET : Tundra
Nearest Settlements:
PlacePopulationDistance
Saint Marcel930 (2014)5.8km
Neyran-Etabloz670 (2014)6.4km
Nus1,826 (2014)6.9km
Fénis1,667 (2015)7.1km
Villefranche593 (2014)7.3km


The manganese concentrations of Prabornaz are restricted to a 4x8 m thick quartzite unit of diverse lithologies which represent the basal part of the sedimentary cover of an ophiolite suite. Together they constituted the Piedmont Nappe which was metamorphosed up to the eclogite facies in Cretaceous times and was retrogressed in the early Tertiary.

The quartzite unit is composed of a succession of siliceous levels characterized by Mn-bearing minerals reflecting differences in chemical composition and oxygen fugacity inherited from the original sediments. The parageneses evolved during the polyphasic Alpine metamorphism passing through a pre-eclogite blue-schist facies event, the main eclogite facies event, and the several post-eclogite stages terminating in the greenschist facies.

These Mn concentrations were subsequently penetrated by several networks of cross-cutting veins and late fractures which were responsible for the mobilization of certain elements, in particular, K, Sr, and Ba.

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
The Alps, EuropeMountain Range

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


66 valid minerals. 4 (TL) - type locality of valid minerals. 2 (FRL) - first recorded locality of unapproved mineral/variety/etc.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Aegirine
Formula: NaFe3+Si2O6
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92; Frank K. Mazdab collection (see https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for analytical data).
Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Reference: Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Albite
Formula: Na(AlSi3O8)
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Aluminoceladonite
Formula: K(Mg,Fe2+)Al(Si4O10)(OH)2
Reference: Marco E. Ciriotti communication, August 25, 2004; Frank K. Mazdab collection (see https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for analytical data).
Anatase
Formula: TiO2
Reference: Marco E. Ciriotti communication 01.09.2004
'Ardennite'
Reference: Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Birnessite
Formula: (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Reference: Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Braunite (TL)
Formula: Mn2+Mn3+6(SiO4)O8
Type Locality:
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92; Perseil, E. A. (1985): Some characteristics of manganese oxide facies in the deposit at St. Marcel-Praborna-Val d'Aosta, Italy. Miner. Deposita 20, 271-276. (in French)
Calcite
Formula: CaCO3
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Calderite
Formula: (Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
Reference: Cenki-Tok, B. & Chopin, C. (2006): Coexisting calderite and spessartine garnets in eclogite-facies metacherts of the Western Alps. Mineralogy and Petrology, 88, 47-68.
Celadonite
Formula: K(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Reference: Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Cerianite-(Ce)
Formula: (Ce4+,Th)O2
Description: See https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for normalized analysis, associated minerals and scanned images of the thin section. The sample for this thin section was collected by Pilar Lecumberri-Sanchez (Univ. Arizona) on a field trip to the locality.
Reference: Frank K. Mazdab collection (see https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for normalized analysis); Frank K. Mazdab collection (see https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for analytical data)
'Chlorite Group'
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Reference: Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Clinozoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Reference: Della Ventura, G., Mottana, A., Parodi, G.C., Griffin, W.L. (1996): FTIR spectroscopy in the OH-stretching region of monoclinic epidotes from Praborna (St. Marcel, Aosta Valley, Italy). European Journal of Mineralogy, 8, 655-665.
Cryptomelane
Formula: K(Mn4+7Mn3+)O16
Reference: Kienast, J.R. & Martin, S. (1983): I pirosseni egirin-giadeitici del livello basale di Praborna, Alpi occidentali. Ofioliti, 8(2), 245-260
Diopside
Formula: CaMgSi2O6
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Diopside var: Schefferite
Formula: (Ca,Mn)(Mg,Fe,Mn)Si2O6
Reference: Bondi M., Mottana A, Kurat G., Rossi G, (1978) - Cristallochimica del Violano e della Schefferite di St Marcel (Vallle d'Aosta) - Rend. S.I.M.P., Milano, vol. 34, (I), pp. 15-25
Diopside var: Violan (FRL)
Formula: CaMgSi2O6
Type Locality:
Reference: August Breithaupt (1838) Journal Prackt. Chemie, 15:329
Edenite
Formula: {Na}{Ca2}{Mg5}(AlSi7O22)(OH)2
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1021.
Ferri-ghoseite
Formula: ☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2
Reference: Cenki-Tok, B. & Chopin, C. (2006): Coexisting calderite and spessartine garnets in eclogite-facies metacherts of the Western Alps. Mineralogy and Petrology, 88, 47-68.
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Canadian Mineralogist: 38, pp. 101-117 (2000)
Gasparite-(La)
Formula: LaAsO4
Description: See https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for normalized analysis, associated minerals and scanned images of the thin section. The sample for this thin section was collected by Pilar Lecumberri-Sanchez (Univ. Arizona) on a field trip to the locality.
Reference: Frank K. Mazdab collection (see https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for normalized analysis); Frank K. Mazdab collection (see https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for analytical data)
Gold
Formula: Au
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Hausmannite
Formula: Mn2+Mn3+2O4
Reference: Castello, P. (1982): Il giacimento manganesifero di Praborna (St. Marcel - AO). Rivista Mineralogica Italiana, 3/1982, 87-92.
Hematite
Formula: Fe2O3
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Hollandite
Formula: Ba(Mn4+6Mn3+2)O16
Reference: Brown P., essene E.J., Peacor D.R. (1978) - The mineralogy and petrology of Manganese-rich rocks from St. Marcel, Piedmont (AND THAT'S A MISTAKE OF REGION), Italy -Contr. Mineral. petrol. (Springer), Vol. 67, n. 3, pp. 227-232
Ilmenite
Formula: Fe2+TiO3
Reference: Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Jacobsite
Formula: Mn2+Fe3+2O4
Reference: Eur. J. Mineral 18:569–582 (2006)
Jadeite
Formula: Na(Al,Fe3+)Si2O6
Reference: Kienast, J.R. & Martin, S. (1983): I pirosseni egirin-giadeitici del livello basale di Praborna, Alpi occidentali. Ofioliti, 8(2), 245-260.
Kutnohorite
Formula: CaMn2+(CO3)2
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Macfallite
Formula: Ca2Mn3+3(SiO4)(Si2O7)(OH)3
Reference: - Ciriotti, M.E., Camara, F., Bittarello, E., Ambrino, P. (2013). Macfallite: secondo ritrovamento italiano a Prabornaz. Micro, 11, 50-59; Frank K. Mazdab collection (see https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for analytical data).
Magnesiochloritoid
Formula: MgAl2(SiO4)O(OH)2
Reference: Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Canadian Mineralogist: 38, pp. 101-117 (2000)
Manganiandrosite-(Ce) (TL)
Formula: {Mn2+Ce}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)
Type Locality:
Reference: Cenki-Tok, B., Ragu, A., Armbruster, T., Chopin, C., Medenbach, O. (2006): New Mn- and rare-earth-rich epidote-group minerals in metacherts: manganiandrosite-(Ce) and vanadoandrosite-(Ce). European Journal of Mineralogy 18, 569-582.
Manganite
Formula: Mn3+O(OH)
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Microcline
Formula: K(AlSi3O8)
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Microcline var: Hyalophane
Formula: (K,Ba)[Al(Si,Al)Si2O8]
Description: See https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for normalized analysis, associated minerals and scanned images of the thin section. The sample for this thin section was collected by Pilar Lecumberri-Sanchez (Univ. Arizona) on a field trip to the locality.
Reference: Frank K. Mazdab collection (see https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for normalized analysis)
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Joseph Freilich specimens
Muscovite var: Alurgite
Formula: K2(Mg,Al)4-5(Al,Si)8O20(OH)4
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Muscovite var: Phengite
Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Reference: Eur. J. Mineral 18:569–582 (2006)
Neotocite
Formula: (Mn,Fe,Mg)SiO3 · H2O
Reference: Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Omphacite
Formula: (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
Reference: Kienast, J.R. & Martin, S. (1983): I pirosseni egirin-giadeitici del livello basale di Praborna, Alpi occidentali. Ofioliti, 8(2), 245-260.
Pentlandite
Formula: (FexNiy)Σ9S8
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92; Frank K. Mazdab collection (see https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for analytical data).
Piemontite (TL)
Formula: {Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Type Locality:
Reference: Das Mohs'sche Mineralsystem; 1853 Wien
Piemontite var: Strontian Piemontite
Formula: {(Ca,Sr)2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Reference: Della Ventura, G., Mottana, A.,Parodi, G.C., Griffin, W.L. (1996): FTIR spectroscopy in the OH-stretching region of monoclinic epidotes from Praborna (St. Marcel, Aosta valley, Italy). Eur. J. Mineral., 8, 655-665; Frank K. Mazdab collection (see https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for analytical data).
Piemontite-(Sr)
Formula: {CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Powellite
Formula: Ca(MoO4)
Reference: Stefan Örtel
Priderite
Formula: K(Ti4+7Fe3+)O16
Reference: Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Pyrolusite
Formula: Mn4+O2
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Pyrophanite
Formula: Mn2+TiO3
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Pyroxmangite
Formula: MnSiO3
Reference: Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Quartz
Formula: SiO2
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Rhodochrosite
Formula: MnCO3
Reference: Eur. J. Mineral 18:569–582 (2006)
Rhodonite
Formula: Mn2+SiO3
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Richterite
Formula: {Na}{NaCa}{Mg5}(Si8O22)(OH)2
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
'Roméite Group' (FRL)
Type Locality:
Description: Occurs with epidote and manganese oxides.
Reference: Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1021; Brugger, J., Gieré, R., Graeser, S., and Meisser, N. (1997): Contributions to Mineralogy and Petrology 127, 136-146.
Rutile
Formula: TiO2
Description: Sb-rich.
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92; Smith, D.C. and Perseil, E.-A. (1997) Sb-rich rutile in the manganese concentrations at St. Marcel-Praborna, Aosta Valley, Italy: petrology and crystal-chemistry. Mineralogical Magazine: 61: 655-669.
Spessartine
Formula: Mn2+3Al2(SiO4)3
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Strontiomelane (TL)
Formula: Sr(Mn4+6Mn3+2)O16
Type Locality:
Reference: N. Meisser et al.: Canadian Mineralogist 37:673-678 (1999)
Talc
Formula: Mg3Si4O10(OH)2
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Tephroite
Formula: Mn2+2SiO4
Reference: Eur. J. Mineral 18:569–582 (2006)
Tiragalloite
Formula: Mn2+4As5+Si3O12(OH)
Reference: Cenki-Tok, B. & Chopin, C. (2006): Coexisting calderite and spessartine garnets in eclogite-facies metacherts of the Western Alps. Mineralogy and Petrology, 88, 47-68.
Titanite
Formula: CaTi(SiO4)O
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 ; Perseil E. A. & Smith D. C., 1995. Sb-rich titanite in the manganese concentrations at St. Marcel-Praborna, Aosta Valley, Italy: petrography and crystal chemistry. Mineralogical Magazine, 59: 717-734.
Titanite var: Greenovite
Formula: CaTi(SiO4)O
Reference: Mottana A., Griffin W.L., (1979) - Pink titanite (greenovite) from St. Marcel, Val D'Aosta, Italy - Rend soc. It. min. Petr., Milano, Vol. 35, n. 1, pp. 135-143
Todorokite
Formula: (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Reference: Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, 3, 87-92
Tweddillite
Formula: {CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)
Colour: in thin section, pleochroic in yellow, orange, red and magenta; similar to and essentially indistinguishable from other Mn-rich members of the epidote group.
Description: For normalized analyses of tweddillite and piemontite from this locality, as well as data for accompanying minerals in the examined thin section, see: https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 In my instructional YouTube video tutorial on "Normalizing epidote-group minerals in MS Excel" (https://www.youtube.com/watch?v=IbMLngyz4Cs), the Prabornaz mine "piemontite" analysis I used to illustrate the normalization calculations turned out to be a REE-bearing tweddillite (named as "manganipiemontite-(Sr)" based on the Armbruster et al., 2006 nomenclature). The sample for this thin section was collected by Pilar Lecumberri-Sanchez (Univ. Arizona) on a field trip to the locality.
Reference: Frank K. Mazdab collection (see https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for normalized analysis)
Uvarovite
Formula: Ca3Cr2(SiO4)3
Reference: Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92 Castello P. (1982) - Il giacimento manganesifero di Praborna (St. Marcel - AO) - Rivista Mineralogica Italiana, Fasc. 3, pp. 87-92
Violarite
Formula: Fe2+Ni3+2S4
Reference: Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
Winchite
Formula: ☐{CaNa}{Mg4Al}(Si8O22)(OH)2
Reference: Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Zircon
Formula: Zr(SiO4)
Reference: Frank K. Mazdab collection (see https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-171 for analytical data)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Pentlandite2.BB.15(FexNiy)Σ9S8
Violarite2.DA.05Fe2+Ni3+2S4
Group 4 - Oxides and Hydroxides
Anatase4.DD.05TiO2
Birnessite4.FL.45(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Cerianite-(Ce)4.DL.05(Ce4+,Th)O2
Cryptomelane4.DK.05aK(Mn4+7Mn3+)O16
Hausmannite4.BB.10Mn2+Mn3+2O4
Hematite4.CB.05Fe2O3
Hollandite4.DK.05aBa(Mn4+6Mn3+2)O16
Ilmenite4.CB.05Fe2+TiO3
Jacobsite4.BB.05Mn2+Fe3+2O4
Magnetite4.BB.05Fe2+Fe3+2O4
Manganite4.FD.15Mn3+O(OH)
Priderite4.DK.05bK(Ti4+7Fe3+)O16
Pyrolusite4.DB.05Mn4+O2
Pyrophanite4.CB.05Mn2+TiO3
Quartz4.DA.05SiO2
'Roméite Group' (TL)4.DH.
Rutile4.DB.05TiO2
Strontiomelane (TL)4.DK.05aSr(Mn4+6Mn3+2)O16
Todorokite4.DK.10(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Kutnohorite5.AB.10CaMn2+(CO3)2
Rhodochrosite5.AB.05MnCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Powellite7.GA.05Ca(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Gasparite-(La)8.AD.50LaAsO4
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Aegirine9.DA.25NaFe3+Si2O6
Aegirine-augite9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Albite9.FA.35Na(AlSi3O8)
Aluminoceladonite9.EC.15K(Mg,Fe2+)Al(Si4O10)(OH)2
Braunite (TL)9.AG.05Mn2+Mn3+6(SiO4)O8
Calderite9.AD.25(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
Celadonite9.EC.15K(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
Clinozoisite9.BG.05a{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Diopside9.DA.15CaMgSi2O6
var: Schefferite9.DA.15(Ca,Mn)(Mg,Fe,Mn)Si2O6
var: Violan (TL)9.DA.15CaMgSi2O6
Edenite9.DE.15{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ferri-ghoseite9.DE.20☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2
Jadeite9.DA.25Na(Al,Fe3+)Si2O6
Macfallite9.BG.15Ca2Mn3+3(SiO4)(Si2O7)(OH)3
Magnesiochloritoid9.AF.85MgAl2(SiO4)O(OH)2
Manganiandrosite-(Ce) (TL)9.BG.05{Mn2+Ce}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)
Microcline9.FA.30K(AlSi3O8)
var: Hyalophane9.FA.30(K,Ba)[Al(Si,Al)Si2O8]
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Alurgite9.EC.15K2(Mg,Al)4-5(Al,Si)8O20(OH)4
var: Phengite9.EC.15KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Neotocite9.ED.20(Mn,Fe,Mg)SiO3 · H2O
Omphacite9.DA.20(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Piemontite (TL)9.BG.05a{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
var: Strontian Piemontite9.BG.05a{(Ca,Sr)2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Piemontite-(Sr)9.BG.05{CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Pyroxmangite9.DO.05MnSiO3
Rhodonite9.DK.05Mn2+SiO3
Richterite9.DE.20{Na}{NaCa}{Mg5}(Si8O22)(OH)2
Spessartine9.AD.25Mn2+3Al2(SiO4)3
Talc9.EC.05Mg3Si4O10(OH)2
Tephroite9.AC.05Mn2+2SiO4
Tiragalloite9.BJ.25Mn2+4As5+Si3O12(OH)
Titanite9.AG.15CaTi(SiO4)O
var: Greenovite9.AG.15CaTi(SiO4)O
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Tweddillite9.BG.05{CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)
Uvarovite9.AD.25Ca3Cr2(SiO4)3
Winchite9.DE.20☐{CaNa}{Mg4Al}(Si8O22)(OH)2
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Ardennite'-
'Chlorite Group'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 9:8
Pentlandite2.7.1.1(FexNiy)Σ9S8
AmBnXp, with (m+n):p = 3:4
Violarite2.10.1.8Fe2+Ni3+2S4
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
Pyrophanite4.3.5.3Mn2+TiO3
AX2
Anatase4.4.4.1TiO2
Cerianite-(Ce)4.4.12.1(Ce4+,Th)O2
Pyrolusite4.4.1.4Mn4+O2
Rutile4.4.1.1TiO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Manganite6.1.3.1Mn3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Hausmannite7.2.7.1Mn2+Mn3+2O4
Jacobsite7.2.2.2Mn2+Fe3+2O4
Magnetite7.2.2.3Fe2+Fe3+2O4
(AB)2X3
Birnessite7.5.3.1(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Braunite (TL)7.5.1.3Mn2+Mn3+6(SiO4)O8
AB3X7
Todorokite7.8.1.1(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
AB8X16
Cryptomelane7.9.1.2K(Mn4+7Mn3+)O16
Hollandite7.9.1.1Ba(Mn4+6Mn3+2)O16
Priderite7.9.4.1K(Ti4+7Fe3+)O16
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Rhodochrosite14.1.1.4MnCO3
AB(XO3)2
Kutnohorite14.2.1.3CaMn2+(CO3)2
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 44 - ANTIMONATES
A2X2O6(O,OH,F)
'Roméite Group' (FRL)44.1.1.3
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Powellite48.1.2.2Ca(MoO4)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Tephroite51.3.1.4Mn2+2SiO4
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Calderite51.4.3a.6(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
Spessartine51.4.3a.3Mn2+3Al2(SiO4)3
Uvarovite51.4.3b.3Ca3Cr2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Magnesiochloritoid52.3.3.2MgAl2(SiO4)O(OH)2
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 57 - SOROSILICATES Si3O10 Groups and Larger Noncyclic Groups
Insular Si3O10 and Larger Noncyclic Groups with [Si4O13] groups
Tiragalloite57.2.1.1Mn2+4As5+Si3O12(OH)
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Clinozoisite58.2.1a.4{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Macfallite58.2.3.2Ca2Mn3+3(SiO4)(Si2O7)(OH)3
Piemontite (TL)58.2.1a.11{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Piemontite-(Sr)58.2.1a.12{CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Aegirine65.1.3c.2NaFe3+Si2O6
Aegirine-augite65.1.3b.2(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Diopside65.1.3a.1CaMgSi2O6
Jadeite65.1.3c.1Na(Al,Fe3+)Si2O6
Omphacite65.1.3b.1(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
Single-Width Unbranched Chains, W=1 with chains P=5
Rhodonite65.4.1.1Mn2+SiO3
Single-Width Unbranched Chains, W=1 with chains P=7
Pyroxmangite65.6.1.1MnSiO3
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Edenite66.1.3a.10{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2
Ferri-ghoseite66.1.1.4☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2
Richterite66.1.3b.9{Na}{NaCa}{Mg5}(Si8O22)(OH)2
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
Winchite66.1.3b.1☐{CaNa}{Mg4Al}(Si8O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Neotocite71.1.5.4(Mn,Fe,Mg)SiO3 · H2O
Sheets of 6-membered rings with 2:1 layers
Celadonite71.2.2a.6K(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Talc71.2.1.3Mg3Si4O10(OH)2
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Clinochlore71.4.1.4Mg5Al(AlSi3O10)(OH)8
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
var: Hyalophane76.1.1.3(K,Ba)[Al(Si,Al)Si2O8]
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Aluminoceladonite-K(Mg,Fe2+)Al(Si4O10)(OH)2
'Ardennite'-
'Chlorite Group'-
Diopside
var: Schefferite
-(Ca,Mn)(Mg,Fe,Mn)Si2O6
var: Violan (FRL)-CaMgSi2O6
Gasparite-(La)-LaAsO4
Manganiandrosite-(Ce) (TL)-{Mn2+Ce}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)
Muscovite
var: Alurgite
-K2(Mg,Al)4-5(Al,Si)8O20(OH)4
var: Phengite-KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Piemontite
var: Strontian Piemontite
-{(Ca,Sr)2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Strontiomelane (TL)-Sr(Mn4+6Mn3+2)O16
Titanite
var: Greenovite
-CaTi(SiO4)O
Tweddillite-{CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)

List of minerals for each chemical element

HHydrogen
H Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
H Manganiandrosite-(Ce){Mn2+Ce}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)
H Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Edenite{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2
H Richterite{Na}{NaCa}{Mg5}(Si8O22)(OH)2
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
H ManganiteMn3+O(OH)
H PhlogopiteKMg3(AlSi3O10)(OH)2
H Muscovite (var: Alurgite)K2(Mg,Al)4-5(Al,Si)8O20(OH)4
H TalcMg3Si4O10(OH)2
H AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
H Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
H TiragalloiteMn42+As5+Si3O12(OH)
H Ferri-ghoseite☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2
H Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
H Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
H CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
H ClinochloreMg5Al(AlSi3O10)(OH)8
H MagnesiochloritoidMgAl2(SiO4)O(OH)2
H Neotocite(Mn,Fe,Mg)SiO3 · H2O
H Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
H Winchite☐{CaNa}{Mg4Al}(Si8O22)(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H MacfalliteCa2Mn33+(SiO4)(Si2O7)(OH)3
H Tweddillite{CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)
H Piemontite (var: Strontian Piemontite){(Ca,Sr)2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
CCarbon
C CalciteCaCO3
C KutnohoriteCaMn2+(CO3)2
C RhodochrositeMnCO3
OOxygen
O StrontiomelaneSr(Mn64+Mn23+)O16
O Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
O BrauniteMn2+Mn63+(SiO4)O8
O Manganiandrosite-(Ce){Mn2+Ce}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)
O Diopside (var: Violan)CaMgSi2O6
O Titanite (var: Greenovite)CaTi(SiO4)O
O Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Diopside (var: Schefferite)(Ca,Mn)(Mg,Fe,Mn)Si2O6
O HollanditeBa(Mn64+Mn23+)O16
O AlbiteNa(AlSi3O8)
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O Edenite{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2
O Richterite{Na}{NaCa}{Mg5}(Si8O22)(OH)2
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O CalciteCaCO3
O HematiteFe2O3
O SpessartineMn32+Al2(SiO4)3
O UvaroviteCa3Cr2(SiO4)3
O ManganiteMn3+O(OH)
O PhlogopiteKMg3(AlSi3O10)(OH)2
O ZirconZr(SiO4)
O Muscovite (var: Alurgite)K2(Mg,Al)4-5(Al,Si)8O20(OH)4
O PyrolusiteMn4+O2
O DiopsideCaMgSi2O6
O AegirineNaFe3+Si2O6
O QuartzSiO2
O RhodoniteMn2+SiO3
O TalcMg3Si4O10(OH)2
O TitaniteCaTi(SiO4)O
O KutnohoriteCaMn2+(CO3)2
O MicroclineK(AlSi3O8)
O HausmanniteMn2+Mn23+O4
O PyrophaniteMn2+TiO3
O RutileTiO2
O MagnetiteFe2+Fe23+O4
O FluorapatiteCa5(PO4)3F
O AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
O AnataseTiO2
O Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
O Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
O JadeiteNa(Al,Fe3+)Si2O6
O CryptomelaneK(Mn74+Mn3+)O16
O Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
O TiragalloiteMn42+As5+Si3O12(OH)
O Ferri-ghoseite☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2
O Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
O TephroiteMn22+SiO4
O RhodochrositeMnCO3
O JacobsiteMn2+Fe23+O4
O Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
O CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
O ClinochloreMg5Al(AlSi3O10)(OH)8
O IlmeniteFe2+TiO3
O MagnesiochloritoidMgAl2(SiO4)O(OH)2
O Neotocite(Mn,Fe,Mg)SiO3 · H2O
O PyroxmangiteMnSiO3
O PrideriteK(Ti74+Fe3+)O16
O Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
O Winchite☐{CaNa}{Mg4Al}(Si8O22)(OH)2
O Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
O MuscoviteKAl2(AlSi3O10)(OH)2
O PowelliteCa(MoO4)
O MacfalliteCa2Mn33+(SiO4)(Si2O7)(OH)3
O Tweddillite{CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)
O Cerianite-(Ce)(Ce4+,Th)O2
O Piemontite (var: Strontian Piemontite){(Ca,Sr)2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
O Gasparite-(La)LaAsO4
O Microcline (var: Hyalophane)(K,Ba)[Al(Si,Al)Si2O8]
FFluorine
F FluorapatiteCa5(PO4)3F
NaSodium
Na AlbiteNa(AlSi3O8)
Na Edenite{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2
Na Richterite{Na}{NaCa}{Mg5}(Si8O22)(OH)2
Na AegirineNaFe3+Si2O6
Na Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Na JadeiteNa(Al,Fe3+)Si2O6
Na Ferri-ghoseite☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2
Na Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Na Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Na Winchite☐{CaNa}{Mg4Al}(Si8O22)(OH)2
Na Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
MgMagnesium
Mg Diopside (var: Violan)CaMgSi2O6
Mg Diopside (var: Schefferite)(Ca,Mn)(Mg,Fe,Mn)Si2O6
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg Edenite{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2
Mg Richterite{Na}{NaCa}{Mg5}(Si8O22)(OH)2
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg Muscovite (var: Alurgite)K2(Mg,Al)4-5(Al,Si)8O20(OH)4
Mg DiopsideCaMgSi2O6
Mg TalcMg3Si4O10(OH)2
Mg AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
Mg Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Mg Ferri-ghoseite☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2
Mg Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Mg CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
Mg MagnesiochloritoidMgAl2(SiO4)O(OH)2
Mg Neotocite(Mn,Fe,Mg)SiO3 · H2O
Mg Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Mg Winchite☐{CaNa}{Mg4Al}(Si8O22)(OH)2
Mg Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
AlAluminium
Al Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Al Manganiandrosite-(Ce){Mn2+Ce}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)
Al Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al AlbiteNa(AlSi3O8)
Al Edenite{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2
Al SpessartineMn32+Al2(SiO4)3
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al Muscovite (var: Alurgite)K2(Mg,Al)4-5(Al,Si)8O20(OH)4
Al MicroclineK(AlSi3O8)
Al AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
Al Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Al Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Al JadeiteNa(Al,Fe3+)Si2O6
Al Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
Al Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al MagnesiochloritoidMgAl2(SiO4)O(OH)2
Al Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Al Winchite☐{CaNa}{Mg4Al}(Si8O22)(OH)2
Al Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Tweddillite{CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)
Al Piemontite (var: Strontian Piemontite){(Ca,Sr)2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Al Microcline (var: Hyalophane)(K,Ba)[Al(Si,Al)Si2O8]
SiSilicon
Si Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Si BrauniteMn2+Mn63+(SiO4)O8
Si Manganiandrosite-(Ce){Mn2+Ce}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)
Si Diopside (var: Violan)CaMgSi2O6
Si Titanite (var: Greenovite)CaTi(SiO4)O
Si Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Diopside (var: Schefferite)(Ca,Mn)(Mg,Fe,Mn)Si2O6
Si AlbiteNa(AlSi3O8)
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si Edenite{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2
Si Richterite{Na}{NaCa}{Mg5}(Si8O22)(OH)2
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si SpessartineMn32+Al2(SiO4)3
Si UvaroviteCa3Cr2(SiO4)3
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si ZirconZr(SiO4)
Si Muscovite (var: Alurgite)K2(Mg,Al)4-5(Al,Si)8O20(OH)4
Si DiopsideCaMgSi2O6
Si AegirineNaFe3+Si2O6
Si QuartzSiO2
Si RhodoniteMn2+SiO3
Si TalcMg3Si4O10(OH)2
Si TitaniteCaTi(SiO4)O
Si MicroclineK(AlSi3O8)
Si AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
Si Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Si Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Si JadeiteNa(Al,Fe3+)Si2O6
Si Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
Si TiragalloiteMn42+As5+Si3O12(OH)
Si Ferri-ghoseite☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2
Si Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Si TephroiteMn22+SiO4
Si CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si MagnesiochloritoidMgAl2(SiO4)O(OH)2
Si Neotocite(Mn,Fe,Mg)SiO3 · H2O
Si PyroxmangiteMnSiO3
Si Winchite☐{CaNa}{Mg4Al}(Si8O22)(OH)2
Si Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si MacfalliteCa2Mn33+(SiO4)(Si2O7)(OH)3
Si Tweddillite{CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)
Si Piemontite (var: Strontian Piemontite){(Ca,Sr)2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Si Microcline (var: Hyalophane)(K,Ba)[Al(Si,Al)Si2O8]
PPhosphorus
P FluorapatiteCa5(PO4)3F
SSulfur
S Pentlandite(FexNiy)Σ9S8
S ViolariteFe2+Ni23+S4
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
K Muscovite (var: Alurgite)K2(Mg,Al)4-5(Al,Si)8O20(OH)4
K MicroclineK(AlSi3O8)
K AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
K CryptomelaneK(Mn74+Mn3+)O16
K Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
K CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
K PrideriteK(Ti74+Fe3+)O16
K Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
K MuscoviteKAl2(AlSi3O10)(OH)2
K Microcline (var: Hyalophane)(K,Ba)[Al(Si,Al)Si2O8]
CaCalcium
Ca Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Ca Diopside (var: Violan)CaMgSi2O6
Ca Titanite (var: Greenovite)CaTi(SiO4)O
Ca Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca Diopside (var: Schefferite)(Ca,Mn)(Mg,Fe,Mn)Si2O6
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca Edenite{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2
Ca Richterite{Na}{NaCa}{Mg5}(Si8O22)(OH)2
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca CalciteCaCO3
Ca UvaroviteCa3Cr2(SiO4)3
Ca DiopsideCaMgSi2O6
Ca TitaniteCaTi(SiO4)O
Ca KutnohoriteCaMn2+(CO3)2
Ca FluorapatiteCa5(PO4)3F
Ca Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Ca Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Ca Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
Ca Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Ca Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Ca Winchite☐{CaNa}{Mg4Al}(Si8O22)(OH)2
Ca Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Ca PowelliteCa(MoO4)
Ca MacfalliteCa2Mn33+(SiO4)(Si2O7)(OH)3
Ca Tweddillite{CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)
Ca Piemontite (var: Strontian Piemontite){(Ca,Sr)2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
TiTitanium
Ti Titanite (var: Greenovite)CaTi(SiO4)O
Ti TitaniteCaTi(SiO4)O
Ti PyrophaniteMn2+TiO3
Ti RutileTiO2
Ti AnataseTiO2
Ti IlmeniteFe2+TiO3
Ti PrideriteK(Ti74+Fe3+)O16
CrChromium
Cr UvaroviteCa3Cr2(SiO4)3
MnManganese
Mn StrontiomelaneSr(Mn64+Mn23+)O16
Mn Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Mn BrauniteMn2+Mn63+(SiO4)O8
Mn Manganiandrosite-(Ce){Mn2+Ce}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)
Mn Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Mn Diopside (var: Schefferite)(Ca,Mn)(Mg,Fe,Mn)Si2O6
Mn HollanditeBa(Mn64+Mn23+)O16
Mn SpessartineMn32+Al2(SiO4)3
Mn ManganiteMn3+O(OH)
Mn PyrolusiteMn4+O2
Mn RhodoniteMn2+SiO3
Mn KutnohoriteCaMn2+(CO3)2
Mn HausmanniteMn2+Mn23+O4
Mn PyrophaniteMn2+TiO3
Mn CryptomelaneK(Mn74+Mn3+)O16
Mn Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
Mn TiragalloiteMn42+As5+Si3O12(OH)
Mn Ferri-ghoseite☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2
Mn TephroiteMn22+SiO4
Mn RhodochrositeMnCO3
Mn JacobsiteMn2+Fe23+O4
Mn Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Mn Neotocite(Mn,Fe,Mg)SiO3 · H2O
Mn PyroxmangiteMnSiO3
Mn Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Mn MacfalliteCa2Mn33+(SiO4)(Si2O7)(OH)3
Mn Tweddillite{CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)
Mn Piemontite (var: Strontian Piemontite){(Ca,Sr)2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
FeIron
Fe Pentlandite(FexNiy)Σ9S8
Fe ViolariteFe2+Ni23+S4
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe Diopside (var: Schefferite)(Ca,Mn)(Mg,Fe,Mn)Si2O6
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe HematiteFe2O3
Fe AegirineNaFe3+Si2O6
Fe MagnetiteFe2+Fe23+O4
Fe Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Fe JadeiteNa(Al,Fe3+)Si2O6
Fe Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
Fe Ferri-ghoseite☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2
Fe Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Fe JacobsiteMn2+Fe23+O4
Fe CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Fe IlmeniteFe2+TiO3
Fe Neotocite(Mn,Fe,Mg)SiO3 · H2O
Fe PrideriteK(Ti74+Fe3+)O16
Fe Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
NiNickel
Ni Pentlandite(FexNiy)Σ9S8
Ni ViolariteFe2+Ni23+S4
AsArsenic
As TiragalloiteMn42+As5+Si3O12(OH)
As Gasparite-(La)LaAsO4
SrStrontium
Sr StrontiomelaneSr(Mn64+Mn23+)O16
Sr Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Sr Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Sr Tweddillite{CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH)
Sr Piemontite (var: Strontian Piemontite){(Ca,Sr)2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
ZrZirconium
Zr ZirconZr(SiO4)
MoMolybdenum
Mo PowelliteCa(MoO4)
BaBarium
Ba HollanditeBa(Mn64+Mn23+)O16
Ba Todorokite(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Ba Microcline (var: Hyalophane)(K,Ba)[Al(Si,Al)Si2O8]
LaLanthanum
La Gasparite-(La)LaAsO4
CeCerium
Ce Manganiandrosite-(Ce){Mn2+Ce}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH)
Ce Cerianite-(Ce)(Ce4+,Th)O2
AuGold
Au GoldAu
ThThorium
Th Cerianite-(Ce)(Ce4+,Th)O2

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Late Paleozoic
251.902 - 358.9 Ma



ID: 3192543
Paleozoic volcanic and intrusive rocks

Age: Phanerozoic (251.902 - 358.9 Ma)

Comments: Alps

Lithology: Ophiolite complex; mafic volcanic rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Paleozoic
251.902 - 541 Ma



ID: 3158862
Palaeozoic mica

Age: Phanerozoic (251.902 - 541 Ma)

Description: medium grade metamorphic

Lithology: Major:{mica schist}, Minor{marble,amphibolite,gneiss}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Penfield, S.H. (1893) On some minerals from the manganese mines of St. Marcel in Piedmont Italy. American Journal of Science, 46, 288-295.
Rondolino, R. (1934) Sopra alcuni minerali di S. Marcel (Valle d'Aosta). Periodico di Mineralogia – Roma, 123-139.
Rondolino, R. (1936) Sopra alcuni anfiboli manganesiferi di Praborna (San Marcel, Valle d'Aosta). Periodico di Mineralogia – Roma, 109-121.
Palache, C., Berman, H., and Frondel, C. (1951) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1021.
Bondi, M., Mottana, A., Kurat, G., and Rossi, G. (1978) Cristallochimica del violano e della schefferite di St. Marcel (Valle d'Aosta). Rendiconti della Società Italiana di Mineralogia e Petrologia, 34, 15-25.
Brown, P., Essene, E.J., and Peacor, D.R. (1978) The mineralogy and petrology of manganese-rich rocks from St. Marcel, Piedmont, Italy. Contributions to Mineralogy and Petrology, 67, 227-232.
Mottana, A., Rossi, G., Kracher, A., and Kurat, G. (1979) Violan revised: Mn bearing Omphacite and Diopside. Tschermaks mineralogische und petrographische Mitteilungen, 26, 187-210.
Martin, S. (1983) La mine de Praborna, Val d'Aoste (Italie): une série manganesifère metamorphoisée das la facies éclogite. These 3me cycle, Univ. Paris VI, xx pp.
Martin-Vernizzi, S. (1984) La mine de Praborna (Val d'Aoste, Italie: une série manganésifère métamorphisée dans le faciès éclogite. Thèse de doctorat, Université Pierre et Marie Curie, Paris, France.
Perseil, E.A. (1985) Some characteristics of manganese oxide facies in the deposit at St. Marcel-Praborna-Val d'Aosta, Italy. Mineralium Deposita, 20, 271-276 (in French).
Preite, D. (1985) La pagina dei Micromounts – Omfacite di Quincinetto e Praborna. Rivista Mineralogica Italiana, 9(2), 88.
Martin, S. and Kienast, J.R. (1987) The HP-LT manganesiferous quartzites of Praborna, Piemonte ophiolite nappe, Italian Western Alps. Schweizerische Mineralogische und Petrographische Mitteilungen, 67, 339-360.
Perseil, E.A. and Smith, D.C. (1995) Sb-rich titanite in the manganese concentrations at St. Marcel-Praborna, Aosta Valley, Italy: petrography and crystal chemistry. Mineralogical Magazine, 59, 717-734.
Della Ventura, G., Mottana, A., Parodi, G.C., and Griffin, W.L. (1996) FTIR spectroscopy in the OH-stretching region of monoclinic epidotes from Praborna (St. Marcel, Aosta valley, Italy). European Journal of Mineralogy, 8, 655-665.
Smith, D.C. and Perseil, E.-A. (1997) Sb-rich rutile in the manganese concentrations at St. Marcel-Praborna, Aosta Valley, Italy: petrology and crystal-chemistry. Mineralogical Magazine, 61, 655-669.
Perseil, E.-A. (1998) Evolution cristallochimique des oxydes de manganèse dans le gisement de St. Marcel Praborna (V. Aoste, Italie). Rend. Fis. Acc. Lincei, s. 9, v. 9 (1998) 4, 315-336.
Perseil, E.-A., Blanc, P., and Ohnenstetter, D. (2000) As-bearing fluorapatite in manganiferous deposits from St. Marcel - Praborna, Val d'Aosta, Italy. Canadian Mineralogist, 38, 101-117.
Piccoli, G.C., Maletto, G., Bosio, P., and Lombardo, B. (2007) Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Tumiati, S., Martin, S., and Godard, G. (2010) Hydrothermal origin of manganese in the high-pressure ophiolite metasediments of Praborna ore deposit (Aosta Valley, Western Alps). European Journal of Mineralogy, 22, 577-594.
Ciriotti, M.E., Cámara, F., Bittarello, E., and Ambrino, P. (2013) Macfallite: secondo ritrovamento italiano a Prabornaz. Micro, 11, 50-59.
Tumiati, S., Godard, G., Martin, S., Malaspina, N., and Poli, S. (2015) Ultra-oxidized rocks in subduction mélanges? Decoupling between oxygen fugacity and oxygen availability in a Mn-rich metasomatic environment. Lithos, 226, 116-130.

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