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Dora Maira coesite-bearing unit (Dora Maira ultra‐high‐pressure unit; Brossasco-Isasca Unit; Dora Maira Massif), Cuneo Province, Piedmont, Italyi
Regional Level Types
Dora Maira coesite-bearing unit (Dora Maira ultra‐high‐pressure unit; Brossasco-Isasca Unit; Dora Maira Massif)Rock Unit
Cuneo ProvinceProvince
PiedmontRegion
ItalyCountry

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Key
Latitude & Longitude (WGS84):
44° North , 7° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~61km
Locality type:
Köppen climate type:
Other Languages:
Italian:
Unità a coesite del Dora Maira (Unità di ultra-alta pressione del Dora Maira; Unità di Brossasco-Isasca; Massiccio Dora Maira), Provincia di Cuneo, Piemonte, Italia


The Dora Maira coesite-bearing unit, also known as Dora‐Maira ultra‐high‐pressure (UHP) unit or Brossasco–Isasca Unit, is a ∼1‐km‐thick continental slice sandwiched between lower‐pressure rock units exposed in southern Dora Maira Massif between the lower Po Valley and the lower Varaita Valley. This unit, which is about 10 x 4 x 1 km in size, consists of orthogneisses and subordinate meta-pelites, marbles and metabasites which underwent UHP metamorphism at P>35 kbar. Ultra-high-pressure metamorphism has created the very unusual pyrope-coesite assemblage in whiteschists and jadeite-coesite assemblage in granofels, emerged from a depth of 100 km during Cretaceous time. These rocks are now covered only by a thin fraction of the synmetamorphic overburden.

The whiteschists outcrops are famous for their (nearly) colorless, very pure pyrope (over 95% pyrope molecule) as crude crystals up to coconut size. Peculiar ultra-high-pressure phases like ellenbergerite, phosphoellenbergerite, magnesiodumortierite, and coesite are found as inclusions armoured in pyrope.

The main composition of the whiteschists is quartz, phengite, talc, kyanite, and pyrope. Some pyropes contain more than 50 vol.% of mineral inclusions, largely kyanite.

Coesite (or its pseudomorphs consisting of polycrystalline quartz aggregates) is found not only in the pyrope-bearing whiteschists but in a wide spectrum of lithologies. It can be found armoured in minerals such as garnet (pyrope and almandine rich), clinopyroxene (jadeite and omphacite), kyanite and zoisite. Coesite relics are often surrounded by peculiar radial cracks in the host mineral, resulting from the increase in volume connected to the coesite to quartz reaction.

Well-known individual localities for pyrope are: Case Parigi (Case Paris) and Case Ramello, Po Valley; Gilba Valley and Pratolungo, Varaita Valley.



IMPORTANT NOTE: The use of the only simplified indication "Dora Maira Massif" to designate the coesite-bearing terrain occurring in the southern sector of this massif, although quite diffuse in the literature and among mineral collectors, should be avoided and discouraged, because the Dora Maira Massif, consisting of different tectonic slices of continental basement intruded by large bodies of late- to post-Variscan granitoids, is the crystalline basement of the Cottian Alps. It is an ellipsoid-shaped body of about 70×25 km, which extends from south to north from Maira Valley (Cuneo Province) to Susa Valley (Torino Province). It includes a very large array of different lithologies and mineral localities, such as the quarries of "Pietra di Luserna" leucogranitic orthogneiss at Montoso and in the Luserna Valley, Monte Bracco, Rocca di Cavour inselberg, the talc mines of Germanasca Valley, the graphite mines in the area near Pinerolo, the gneiss quarries of Borgone di Susa and Bussoleno in Susa Valley, etc.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

33 valid minerals. 6 (TL) - type locality of valid minerals.

Detailed Mineral List:

Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: Piccoli, G.C. (2002). Minerali delle Alpi Marittime e Cozie Provincia di Cuneo. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 366 pp.
Aluminoceladonite
Formula: K(Mg,Fe2+)Al(Si4O10)(OH)2
Reference: Sergey Vasiliev
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: [MinRec 27:303]
Bearthite (TL)
Formula: Ca2Al(PO4)2(OH)
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.; Chopin C, Brunet F, Gebert W, Medenbach O, Tillmanns E (1993): Bearthite, Ca2Al[PO4]2(OH), a new mineral from high-pressure terranes of the western Alps. Schweizerische Mineralogische und Petrographische Mitteilungen 73, 1-9.
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Coesite
Formula: SiO2
Corundum
Formula: Al2O3
Dravite
Formula: Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Ellenbergerite (TL)
Formula: Mg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10
Reference: Contr. Mineral. Petrol., 92, 316-321.; MinRec 27:303; 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.
'Ellenbergerite-(PO4)'
Formula: (Mg,◻)2(Mg,Al)12(HSiO4)6(HPO4)(OH)6
Reference: Chukanov, N.V. (2014): Infrared spectra of mineral species: Extended library. Springer (Springer Geochemistry/Mineralogy), vol. 1, Dordrecht, 1726 pp.
Enstatite
Formula: Mg2Si2O6
'Ferro-nybøite'
Formula: NaNa2(Fe2+3Al2)(AlSi7)O22(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
Gedrite
Formula: ☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
Goethite
Formula: α-Fe3+O(OH)
Reference: Piccoli, G.C. (2002). Minerali delle Alpi Marittime e Cozie Provincia di Cuneo. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 366 pp.
Hydroxylwagnerite (TL)
Formula: Mg2(PO4)(OH)
Type Locality:
Reference: IMA Website
Kyanite
Formula: Al2(SiO4)O
Magnesiochloritoid
Formula: MgAl2(SiO4)O(OH)2
Magnesiodumortierite (TL)
Formula: (Mg,Ti,◻(Al,Mg)2Al4Si3O18-y(OH)yB y = 2-3
Reference: Chopin C, Ferraris G, Ivaldi G, Schertl H P, Schreyer W, Compagnoni R, Davidson C, Davis A M (1995): Magnesiodumortierite, a new mineral from very-high-pressure rocks (western Alps). II. Crystal chemistry and petrological significance. European Journal of Mineralogy 7, 525-535.
Magnesiostaurolite (TL)
Formula: Mg(Mg,Li)3(Al,Mg)18Si8O44(OH)4
Description: Occurs together with talc, clinochlore and kyanite (or alone, armouring corundum) as inclusions in pyrope megablasts.
Reference: Terra Nova, Abstract supplement 1, 9, 40; European Journal of Mineralogy (2003), 15, 167-176; Simon, G. & Chopin, C. (2001): Enstatite-sapphirine crack-related assemblages in ultrahigh-pressure pyrope megablasts, Dora-Maira massif, western Alps. Contributions to Mineralogy and Petrology 140, 422-440.
'Manganese Oxides'
Reference: Simone Ferrero collection
'Monazite'
Reference: [MinRec 27:303]
Monazite-(Ce)
Formula: Ce(PO4)
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.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Muscovite var: Phengite
Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Nybøite
Formula: NaNa2(Mg3Al2)(AlSi7O22)(OH)2
Reference: www.minsocam.org/msa/Handbook/Nyboite.PDF
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Simon, G. & Chopin, C. (2001): Enstatite-sapphirine crack-related assemblages in ultrahigh-pressure pyrope megablasts, Dora-Maira massif, western Alps. Contributions to Mineralogy and Petrology 140, 422-440.
Phosphoellenbergerite (TL)
Formula: (Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6
Reference: Contrib. Min. Pet. (1998) 131, 54; Am. Mineral. (1999) 84, 1196
'Plumbogummite Group'
Reference: Simon, G. & Chopin, C. (2001): Enstatite-sapphirine crack-related assemblages in ultrahigh-pressure pyrope megablasts, Dora-Maira massif, western Alps. Contributions to Mineralogy and Petrology 140, 422-440.
Pyrite
Formula: FeS2
Reference: Piccoli, G.C. (2002). Minerali delle Alpi Marittime e Cozie Provincia di Cuneo. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 366 pp.
Pyrope
Formula: Mg3Al2(SiO4)3
Quartz
Formula: SiO2
Reference: [MinRec 27:303]
Rutile
Formula: TiO2
Sapphirine
Formula: Mg4(Mg3Al9)O4[Si3Al9O36]
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Spinel
Formula: MgAl2O4
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.; Simon, G. & Chopin, C. (2001): Enstatite-sapphirine crack-related assemblages in ultrahigh-pressure pyrope megablasts, Dora-Maira massif, western Alps. Contributions to Mineralogy and Petrology 140, 422-440.
Sulphur
Formula: S8
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.
Talc
Formula: Mg3Si4O10(OH)2
'Taramite Root Name'
Formula: A(CaNa)(Z2+3Z3+2)(Al2Si6O22)(OH,F,Cl)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.
Vermiculite
Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Reference: [MinRec 27:303]
Wagnerite
Formula: (Mg,Fe2+)2(PO4)F
Zircon
Formula: Zr(SiO4)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Sulphur1.CC.05S8
Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Coesite4.DA.35SiO2
Corundum4.CB.05Al2O3
Goethite4.00.α-Fe3+O(OH)
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Spinel4.BB.05MgAl2O4
Group 8 - Phosphates, Arsenates and Vanadates
Bearthite (TL)8.BG.05Ca2Al(PO4)2(OH)
Hydroxylwagnerite (TL)8.BB.15Mg2(PO4)(OH)
Monazite-(Ce)8.AD.50Ce(PO4)
Phosphoellenbergerite (TL)8.BB.55(Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6
Wagnerite8.BB.15(Mg,Fe2+)2(PO4)F
Group 9 - Silicates
Almandine9.AD.25Fe2+3Al2(SiO4)3
Aluminoceladonite9.EC.15K(Mg,Fe2+)Al(Si4O10)(OH)2
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
Dravite9.CK.05Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Ellenbergerite (TL)9.AF.80Mg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10
Enstatite9.DA.05Mg2Si2O6
Gedrite9.DD.05☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
Kyanite9.AF.15Al2(SiO4)O
Magnesiochloritoid9.AF.85MgAl2(SiO4)O(OH)2
Magnesiodumortierite (TL)9.AJ.10(Mg,Ti,◻(Al,Mg)2Al4Si3O18-y(OH)yB y = 2-3
Magnesiostaurolite (TL)9.AF.30Mg(Mg,Li)3(Al,Mg)18Si8O44(OH)4
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Phengite9.EC.15KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Nybøite9.DE.25NaNa2(Mg3Al2)(AlSi7O22)(OH)2
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Pyrope9.AD.25Mg3Al2(SiO4)3
Sapphirine9.DH.45Mg4(Mg3Al9)O4[Si3Al9O36]
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Talc9.EC.05Mg3Si4O10(OH)2
Vermiculite9.EC.50Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Ellenbergerite-(PO4)'-(Mg,◻)2(Mg,Al)12(HSiO4)6(HPO4)(OH)6
'Ferro-nybøite'-NaNa2(Fe2+3Al2)(AlSi7)O22(OH)2
'Manganese Oxides'-
'Monazite'-
'Plumbogummite Group'-
'Taramite Root Name'-A(CaNa)(Z2+3Z3+2)(Al2Si6O22)(OH,F,Cl)2

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Sulphur1.3.5.1S8
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Corundum4.3.1.1Al2O3
AX2
Rutile4.4.1.1TiO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Spinel7.2.1.1MgAl2O4
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
AXO4
Monazite-(Ce)38.4.3.1Ce(PO4)
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A2(XO4)Zq
Hydroxylwagnerite (TL)41.6.2.2Mg2(PO4)(OH)
Wagnerite41.6.2.1(Mg,Fe2+)2(PO4)F
(AB)3(XO4)2Zq
Bearthite (TL)41.10.4.2Ca2Al(PO4)2(OH)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Pyrope51.4.3a.1Mg3Al2(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 [4] and >[4] coordination
Kyanite52.2.2c.1Al2(SiO4)O
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
Ellenbergerite (TL)52.4.10.1Mg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with (BO3)
Magnesiodumortierite (TL)54.1.2.2(Mg,Ti,◻(Al,Mg)2Al4Si3O18-y(OH)yB y = 2-3
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
Dravite61.3.1.9Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Enstatite65.1.2.1Mg2Si2O6
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Gedrite66.1.2.5☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
Nybøite66.1.3c.11NaNa2(Mg3Al2)(AlSi7O22)(OH)2
Group 69 - INOSILICATES Chains with Side Branches or Loops
Chains with Side Branches or Loops with P>2
Sapphirine69.2.1b.1Mg4(Mg3Al9)O4[Si3Al9O36]
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Talc71.2.1.3Mg3Si4O10(OH)2
Vermiculite71.2.2d.3Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
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
Coesite75.1.4.1SiO2
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Aluminoceladonite-K(Mg,Fe2+)Al(Si4O10)(OH)2
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Ellenbergerite-(PO4)'-(Mg,◻)2(Mg,Al)12(HSiO4)6(HPO4)(OH)6
'Ferro-nybøite'-NaNa2(Fe2+3Al2)(AlSi7)O22(OH)2
Magnesiostaurolite (TL)-Mg(Mg,Li)3(Al,Mg)18Si8O44(OH)4
'Manganese Oxides'-
'Monazite'-
Muscovite
var: Phengite
-KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Phosphoellenbergerite (TL)-(Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6
'Plumbogummite Group'-
'Taramite Root Name'-A(CaNa)(Z2+3Z3+2)(Al2Si6O22)(OH,F,Cl)2

List of minerals for each chemical element

HHydrogen
H Magnesiodumortierite(Mg,Ti,◻(Al,Mg)2Al4Si3O18-y(OH)yB y = 2-3
H MagnesiostauroliteMg(Mg,Li)3(Al,Mg)18Si8O44(OH)4
H BearthiteCa2Al(PO4)2(OH)
H EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10
H HydroxylwagneriteMg2(PO4)(OH)
H Phosphoellenbergerite(Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6
H DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H Goethiteα-Fe3+O(OH)
H Ferro-nybøiteNaNa2(Fe32+Al2)(AlSi7)O22(OH)2
H Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H TalcMg3Si4O10(OH)2
H ClinochloreMg5Al(AlSi3O10)(OH)8
H Gedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
H MagnesiochloritoidMgAl2(SiO4)O(OH)2
H Taramite Root NameA(CaNa)(Z32+Z23+)(Al2Si6O22)(OH,F,Cl)2
H PhlogopiteKMg3(AlSi3O10)(OH)2
H NybøiteNaNa2(Mg3Al2)(AlSi7O22)(OH)2
H ApatiteCa5(PO4)3(Cl/F/OH)
H VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
H AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
H Ellenbergerite-(PO4)(Mg,◻)2(Mg,Al)12(HSiO4)6(HPO4)(OH)6
LiLithium
Li MagnesiostauroliteMg(Mg,Li)3(Al,Mg)18Si8O44(OH)4
BBoron
B Magnesiodumortierite(Mg,Ti,◻(Al,Mg)2Al4Si3O18-y(OH)yB y = 2-3
B DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C Phosphoellenbergerite(Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6
OOxygen
O Magnesiodumortierite(Mg,Ti,◻(Al,Mg)2Al4Si3O18-y(OH)yB y = 2-3
O MagnesiostauroliteMg(Mg,Li)3(Al,Mg)18Si8O44(OH)4
O BearthiteCa2Al(PO4)2(OH)
O EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10
O HydroxylwagneriteMg2(PO4)(OH)
O Phosphoellenbergerite(Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6
O CoesiteSiO2
O DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O PyropeMg3Al2(SiO4)3
O KyaniteAl2(SiO4)O
O RutileTiO2
O ZirconZr(SiO4)
O EnstatiteMg2Si2O6
O SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
O Goethiteα-Fe3+O(OH)
O AlmandineFe32+Al2(SiO4)3
O Ferro-nybøiteNaNa2(Fe32+Al2)(AlSi7)O22(OH)2
O Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
O MuscoviteKAl2(AlSi3O10)(OH)2
O TalcMg3Si4O10(OH)2
O CorundumAl2O3
O ClinochloreMg5Al(AlSi3O10)(OH)8
O Gedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
O MagnesiochloritoidMgAl2(SiO4)O(OH)2
O Monazite-(Ce)Ce(PO4)
O SpinelMgAl2O4
O Taramite Root NameA(CaNa)(Z32+Z23+)(Al2Si6O22)(OH,F,Cl)2
O Wagnerite(Mg,Fe2+)2(PO4)F
O PhlogopiteKMg3(AlSi3O10)(OH)2
O NybøiteNaNa2(Mg3Al2)(AlSi7O22)(OH)2
O ApatiteCa5(PO4)3(Cl/F/OH)
O QuartzSiO2
O VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
O AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
O Ellenbergerite-(PO4)(Mg,◻)2(Mg,Al)12(HSiO4)6(HPO4)(OH)6
FFluorine
F Taramite Root NameA(CaNa)(Z32+Z23+)(Al2Si6O22)(OH,F,Cl)2
F Wagnerite(Mg,Fe2+)2(PO4)F
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Na Ferro-nybøiteNaNa2(Fe32+Al2)(AlSi7)O22(OH)2
Na Taramite Root NameA(CaNa)(Z32+Z23+)(Al2Si6O22)(OH,F,Cl)2
Na NybøiteNaNa2(Mg3Al2)(AlSi7O22)(OH)2
MgMagnesium
Mg Magnesiodumortierite(Mg,Ti,◻(Al,Mg)2Al4Si3O18-y(OH)yB y = 2-3
Mg MagnesiostauroliteMg(Mg,Li)3(Al,Mg)18Si8O44(OH)4
Mg EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10
Mg HydroxylwagneriteMg2(PO4)(OH)
Mg Phosphoellenbergerite(Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6
Mg DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Mg PyropeMg3Al2(SiO4)3
Mg EnstatiteMg2Si2O6
Mg SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Mg Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Mg TalcMg3Si4O10(OH)2
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
Mg Gedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
Mg MagnesiochloritoidMgAl2(SiO4)O(OH)2
Mg SpinelMgAl2O4
Mg Wagnerite(Mg,Fe2+)2(PO4)F
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg NybøiteNaNa2(Mg3Al2)(AlSi7O22)(OH)2
Mg VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Mg AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
Mg Ellenbergerite-(PO4)(Mg,◻)2(Mg,Al)12(HSiO4)6(HPO4)(OH)6
AlAluminium
Al Magnesiodumortierite(Mg,Ti,◻(Al,Mg)2Al4Si3O18-y(OH)yB y = 2-3
Al MagnesiostauroliteMg(Mg,Li)3(Al,Mg)18Si8O44(OH)4
Al BearthiteCa2Al(PO4)2(OH)
Al EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10
Al DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al PyropeMg3Al2(SiO4)3
Al KyaniteAl2(SiO4)O
Al SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Al AlmandineFe32+Al2(SiO4)3
Al Ferro-nybøiteNaNa2(Fe32+Al2)(AlSi7)O22(OH)2
Al Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al CorundumAl2O3
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al Gedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
Al MagnesiochloritoidMgAl2(SiO4)O(OH)2
Al SpinelMgAl2O4
Al Taramite Root NameA(CaNa)(Z32+Z23+)(Al2Si6O22)(OH,F,Cl)2
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al NybøiteNaNa2(Mg3Al2)(AlSi7O22)(OH)2
Al VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Al AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
Al Ellenbergerite-(PO4)(Mg,◻)2(Mg,Al)12(HSiO4)6(HPO4)(OH)6
SiSilicon
Si Magnesiodumortierite(Mg,Ti,◻(Al,Mg)2Al4Si3O18-y(OH)yB y = 2-3
Si MagnesiostauroliteMg(Mg,Li)3(Al,Mg)18Si8O44(OH)4
Si EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10
Si CoesiteSiO2
Si DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si PyropeMg3Al2(SiO4)3
Si KyaniteAl2(SiO4)O
Si ZirconZr(SiO4)
Si EnstatiteMg2Si2O6
Si SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Si AlmandineFe32+Al2(SiO4)3
Si Ferro-nybøiteNaNa2(Fe32+Al2)(AlSi7)O22(OH)2
Si Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si TalcMg3Si4O10(OH)2
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si Gedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
Si MagnesiochloritoidMgAl2(SiO4)O(OH)2
Si Taramite Root NameA(CaNa)(Z32+Z23+)(Al2Si6O22)(OH,F,Cl)2
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si NybøiteNaNa2(Mg3Al2)(AlSi7O22)(OH)2
Si QuartzSiO2
Si VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Si AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
Si Ellenbergerite-(PO4)(Mg,◻)2(Mg,Al)12(HSiO4)6(HPO4)(OH)6
PPhosphorus
P BearthiteCa2Al(PO4)2(OH)
P HydroxylwagneriteMg2(PO4)(OH)
P Phosphoellenbergerite(Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6
P Monazite-(Ce)Ce(PO4)
P Wagnerite(Mg,Fe2+)2(PO4)F
P ApatiteCa5(PO4)3(Cl/F/OH)
P Ellenbergerite-(PO4)(Mg,◻)2(Mg,Al)12(HSiO4)6(HPO4)(OH)6
SSulfur
S SulphurS8
S PyriteFeS2
ClChlorine
Cl Taramite Root NameA(CaNa)(Z32+Z23+)(Al2Si6O22)(OH,F,Cl)2
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
K PhlogopiteKMg3(AlSi3O10)(OH)2
K AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2
CaCalcium
Ca BearthiteCa2Al(PO4)2(OH)
Ca Taramite Root NameA(CaNa)(Z32+Z23+)(Al2Si6O22)(OH,F,Cl)2
Ca ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Ti EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10
Ti RutileTiO2
FeIron
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe PyriteFeS2
Fe Goethiteα-Fe3+O(OH)
Fe AlmandineFe32+Al2(SiO4)3
Fe Ferro-nybøiteNaNa2(Fe32+Al2)(AlSi7)O22(OH)2
Fe Muscovite (var: Phengite)KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Fe VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
ZrZirconium
Zr EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10
Zr ZirconZr(SiO4)
CeCerium
Ce Monazite-(Ce)Ce(PO4)

Geochronology

Mineralization age: Eocene : 35.4 ± 1 Ma

Important note: This table is based only on rock and mineral ages recorded on mindat.org for this locality and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic TimeRocks, Minerals and Events
Phanerozoic
 Cenozoic
  Paleogene
   Eocene
ⓘ Zircon35.4 ± 1 MaMasueria, Gilba Valley, Brossasco, Cuneo Province, Piedmont, Italy

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Hermann, J. (2003) Experimental evidence for diamond-facies metamorphism in the Dora-Maira massif. Lithos 70: 163-182.

Localities in this Region

Other Regions, Features and Areas that Intersect

Eurasian PlateTectonic Plate
Europe
Italy

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