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Leggia Valley, Leggia, Grono, Moesa Region, Grisons, Switzerlandi
Regional Level Types
Leggia ValleyValley
LeggiaVillage
GronoMunicipality
Moesa RegionRegion
GrisonsCanton
SwitzerlandCountry

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PhotosMapsSearch
Type:
Valley
Mindat Locality ID:
302433
Long-form identifier:
mindat:1:2:302433:4
GUID (UUID V4):
76fa6797-437c-40c0-9847-556a9b89932d
Other Languages:
Italian:
Val Leggia, Leggia, Grono, Regione Moesa, Grigioni, Svizzera
Lombard:
Val Lègia, Lègia, Gron, Region Moesa, Canton Grisun, Svizera


LCT and NYF pegmatites that are part of the so-called Bodengo pegmatite area, a large region including the upper portions of a series of valleys (Leggia and Cama valleys, Moesa, Grisons, Switzerland; Bodengo, Soè and Garzelli valleys, Sondrio Province, Lombardy, Italy; Dosso and Darengo valleys, Como Province, Lombardy, Italy) located between the Mesolcina (west) and Mera (east) valleys, Southern Steep Belt of the Central Alps.

The two main LCT pegmatite bodies in Leggia Valley are known as Pizzo Paglia pegmatite dyke (2385 m a.s.l.; VLGa in Guastoni et al., 2014) and Colonello pegmatite dyke (2160 m a.s.l.; VLGb in Guastoni et al., 2014). They are characterised respectively by the following mineral assemblage: K feldspar, albite, quartz, muscovite, biotite, beryl, schorl, almandine-spessartine garnets (core Alm58Sps41Pyr1 to rim Alm73Sps23Pyr3), zircon, K feldspar, albite, albite var. cleavelandite, quartz, muscovite, beryl, schorl, almandine-spessartine garnets, wodginite, zircon.

A NYF pegmatite body outcrops at an intermadiate elevation between the previous ones (VLGm in Guastoni et al., 2014). It is characterised by the presence of K feldspar, albite, quartz, aeschynite-(Y), biotite, columbite-(Fe), euxenite-(Y), monazite-(Ce), spessartine-almandine garnets (core Sps65Alm29Pyr4 to rim Sps51Alm40Py5), zircon.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

13 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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

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Alphabetical List Tree Diagram

Detailed Mineral List:

β“˜ Aeschynite-(Ce)
Formula: (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
β“˜ Albite
Formula: Na(AlSi3O8)
β“˜ Albite var. Cleavelandite
Formula: Na(AlSi3O8)
β“˜ Almandine
Formula: Fe2+3Al2(SiO4)3
Description: Core Alm58Sps41Pyr1 to rim Alm73Sps23Pyr3.
β“˜ 'Almandine-Spessartine Series'
β“˜ Beryl
Formula: Be3Al2(Si6O18)
β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜ Columbite-(Fe)
Formula: Fe2+Nb2O6
β“˜ Euxenite-(Y)
Formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
β“˜ 'Garnet Group'
Formula: X3Z2(SiO4)3
β“˜ 'K Feldspar'
β“˜ Monazite-(Ce)
Formula: Ce(PO4)
Description: As yellow-orange euhedral crystals
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ Quartz
Formula: SiO2
β“˜ Quartz var. Smoky Quartz
Formula: SiO2
β“˜ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜ Spessartine
Formula: Mn2+3Al2(SiO4)3
Description: Core Sps65Alm29Pyr4 to rim Sps51Alm40Py5.
β“˜ Wodginite
Formula: Mn2+Sn4+Ta2O8
β“˜ Zircon
Formula: Zr(SiO4)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
β“˜Quartz4.DA.05SiO2
β“˜var. Smoky Quartz4.DA.05SiO2
β“˜Columbite-(Fe)4.DB.35Fe2+Nb2O6
β“˜Wodginite4.DB.40Mn2+Sn4+Ta2O8
β“˜Aeschynite-(Ce)4.DF.05(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
β“˜Euxenite-(Y)4.DG.05(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Monazite-(Ce)8.AD.50Ce(PO4)
Group 9 - Silicates
β“˜Spessartine9.AD.25Mn2+3Al2(SiO4)3
β“˜Almandine9.AD.25Fe2+3Al2(SiO4)3
β“˜Zircon9.AD.30Zr(SiO4)
β“˜Beryl9.CJ.05Be3Al2(Si6O18)
β“˜Schorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Albite9.FA.35Na(AlSi3O8)
β“˜var. Cleavelandite9.FA.35Na(AlSi3O8)
Unclassified
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜'Almandine-Spessartine Series'-
β“˜'K Feldspar'-
β“˜'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
Hβ“˜ Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
BeBeryllium
Beβ“˜ BerylBe3Al2(Si6O18)
BBoron
Bβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
Oβ“˜ Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ AlmandineFe32+Al2(SiO4)3
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oβ“˜ BerylBe3Al2(Si6O18)
Oβ“˜ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Oβ“˜ Columbite-(Fe)Fe2+Nb2O6
Oβ“˜ Monazite-(Ce)Ce(PO4)
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ QuartzSiO2
Oβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oβ“˜ Quartz var. Smoky QuartzSiO2
Oβ“˜ SpessartineMn32+Al2(SiO4)3
Oβ“˜ WodginiteMn2+Sn4+Ta2O8
Oβ“˜ ZirconZr(SiO4)
Oβ“˜ Albite var. CleavelanditeNa(AlSi3O8)
Oβ“˜ Garnet GroupX3Z2(SiO4)3
FFluorine
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
Naβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Naβ“˜ Albite var. CleavelanditeNa(AlSi3O8)
MgMagnesium
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ AlmandineFe32+Al2(SiO4)3
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alβ“˜ BerylBe3Al2(Si6O18)
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alβ“˜ SpessartineMn32+Al2(SiO4)3
Alβ“˜ Albite var. CleavelanditeNa(AlSi3O8)
SiSilicon
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ AlmandineFe32+Al2(SiO4)3
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siβ“˜ BerylBe3Al2(Si6O18)
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ QuartzSiO2
Siβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siβ“˜ Quartz var. Smoky QuartzSiO2
Siβ“˜ SpessartineMn32+Al2(SiO4)3
Siβ“˜ ZirconZr(SiO4)
Siβ“˜ Albite var. CleavelanditeNa(AlSi3O8)
Siβ“˜ Garnet GroupX3Z2(SiO4)3
PPhosphorus
Pβ“˜ Monazite-(Ce)Ce(PO4)
KPotassium
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Caβ“˜ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
TiTitanium
Tiβ“˜ Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiβ“˜ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
MnManganese
Mnβ“˜ SpessartineMn32+Al2(SiO4)3
Mnβ“˜ WodginiteMn2+Sn4+Ta2O8
FeIron
Feβ“˜ Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Feβ“˜ AlmandineFe32+Al2(SiO4)3
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feβ“˜ Columbite-(Fe)Fe2+Nb2O6
Feβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
YYttrium
Yβ“˜ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
ZrZirconium
Zrβ“˜ ZirconZr(SiO4)
NbNiobium
Nbβ“˜ Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Nbβ“˜ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Nbβ“˜ Columbite-(Fe)Fe2+Nb2O6
SnTin
Snβ“˜ WodginiteMn2+Sn4+Ta2O8
CeCerium
Ceβ“˜ Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Ceβ“˜ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ceβ“˜ Monazite-(Ce)Ce(PO4)
TaTantalum
Taβ“˜ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Taβ“˜ WodginiteMn2+Sn4+Ta2O8
ThThorium
Thβ“˜ Aeschynite-(Ce)(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Thβ“˜ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
UUranium
Uβ“˜ Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

Localities in this Region

Switzerland

Other Regions, Features and Areas that Intersect

Eurasian PlateTectonic Plate
Europe
Switzerland

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Guastoni, A. (2012) LCT (lithium, cesium, tantalum) and NYF (niobium, yttrium, fluorine) pegmatites in the Central Alps. Proxies of exhumation history of the Alpine nappe stack in the Lepontine Dome. Ph.D. Thesis. University of Padova, Dept. of Geosciences, 159 pp.
Guastoni, A., Pennacchioni, G., Pozzi, G., Fioretti, A. M., and Walters, J.M. (2014) Tertiary pegmatite dikes of the Central Alps. The Canadian Mineralogist, 52, 2, 191-219.
Guastoni, A., Pozzi, G., Secco, L., Schiazza, M., Pennacchioni, G., Fioretti, A. M., and Nestola, F. (2016) Monazite-(Ce) and xenotime-(Y) from an LCT, NYF Tertiary pegmatite field: Evidence from a regional study in the Central Alps (Italy and Switzerland). The Canadian Mineralogist, 54, 4, 863-877.
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