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Ronco tunnel (Bedretto window; Ronco window) [south section], Ronco, Bedretto, Leventina, Ticino, Switzerlandi
Regional Level Types
Ronco tunnel (Bedretto window; Ronco window) [south section]Tunnel
RoncoHamlet
BedrettoCommune
LeventinaDistrict
TicinoCanton
SwitzerlandCountry

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PhotosMapsSearch
Type:
Tunnel
Mindat Locality ID:
133274
Long-form identifier:
mindat:1:2:133274:5
GUID (UUID V4):
85dce4e4-02a2-4574-86b7-0c831a9807d1
Other Languages:
German:
Ronco-Stollen (Bedrettofenster; Roncofenster) [SΓΌdteil], Bedretto, Bezirk Leventina, Tessin, Schweiz
Italian:
Galleria di Ronco (Finestra di Bedretto; Finestra di Ronco) [sezione sud], Bedretto, Distretto di Leventina, Ticino, Svizzera


South section of the access tunnel to the Furka base tunnel. The Bedretto tunnel was built in the 1970s as an auxiliary access drift to the Furka base tunnel. After completion of the Furka base tunnel, it was completely abandoned. The portal of the 5.22-km-long Bedretto tunnel is located close to the village of Ronco, southeast of Pizzo Rotondo.

The tunnel penetrates the Variscan Rotondo granite, which intruded the Palaeozoic polymetamorphic crystalline basement rocks of the Gotthard massif
at 294.3 Β± 1.1 Ma. The major mineral components of the Rotondo granite are albite, K feldspar, quartz, muscovite and biotite. Epidote-clinozoisite, chlorite, zircon, titanite, and carbonates are present as accessory minerals. Amongst opaque ore minerals pyrite is most abundant.


Note: for the north section (Obergoms, Goms, Valais), see https://www.mindat.org/locedit.php?loc=342754

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


20 valid minerals.

Rock Types Recorded

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

β“˜ Aeschynite-(Y)
Formula: (Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Description: In hydrotermally altered Rotondo granite, at ca. 2255 m from the portal, in association with anatase, brookite, gadolinite-(Y), magnetite, synchysite-(Ce), and xenotime-(Y).
β“˜ Albite
Formula: Na(AlSi3O8)
β“˜ Allanite-(Ce)
Formula: (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
β“˜ Anatase
Formula: TiO2
Description: In hydrotermally altered Rotondo granite, at ca. 2255 m from the portal, in association with aeschynite-(Y), brookite, gadolinite-(Y), magnetite, synchysite-(Ce), and xenotime-(Y).
β“˜ Bassanite
Formula: Ca(SO4) · 0.5H2O
Description: As fibrous tiny crystals in a thin zone between gypsum and granite.
β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜ Brookite
Formula: TiO2
Description: In hydrotermally altered Rotondo granite, at ca. 2255 m from the portal, in association with aeschynite-(Y), anatase, gadolinite-(Y), magnetite, synchysite-(Ce), and xenotime-(Y).
β“˜ Cannizzarite
Formula: Pb48Bi56S132
Description: In hydrotermally altered Rotondo granite, at ca. 2255 m from the portal, in association with galena.
β“˜ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
β“˜ 'Clinozoisite-Epidote Series'
β“˜ Gadolinite-(Y)
Formula: Y2Fe2+Be2Si2O10
Description: In hydrotermally altered Rotondo granite, at ca. 2255 m from the portal, in association with aeschynite-(Y), anatase, brookite, magnetite, synchysite-(Ce), and xenotime-(Y).
β“˜ Galena
Formula: PbS
Description: In hydrotermally altered Rotondo granite, at ca. 2255 m from the portal, in association with cannizzarite.
β“˜ Gypsum
Formula: CaSO4 · 2H2O
β“˜ 'K Feldspar'
β“˜ Magnetite
Formula: Fe2+Fe3+2O4
Description: In hydrotermally altered Rotondo granite, at ca. 2255 m from the portal, in association with aeschynite-(Y), anatase, brookite, gadolinite-(Y), synchysite-(Ce), and xenotime-(Y).
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ Pyrite
Formula: FeS2
β“˜ Quartz
Formula: SiO2
β“˜ Rutile
Formula: TiO2
Description: In association with anatase, brookite, REE-minerals, etc.
β“˜ Synchysite-(Ce)
Formula: CaCe(CO3)2F
Description: In hydrotermally altered Rotondo granite, at ca. 2255 m from the portal, in association with aeschynite-(Y), anatase, brookite, gadolinite-(Y), magnetite, and xenotime-(Y). From other occurrences in association with rutile, ecc.
β“˜ Titanite
Formula: CaTi(SiO4)O
β“˜ Xenotime-(Y)
Formula: Y(PO4)
Description: In hydrotermally altered Rotondo granite, at ca. 2255 m from the portal, in association with aeschynite-(Y), anatase, brookite, gadolinite-(Y), magnetite, and synchysite-(Ce).
β“˜ Zircon
Formula: Zr(SiO4)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜Galena2.CD.10PbS
β“˜Pyrite2.EB.05aFeS2
β“˜Cannizzarite2.JB.20Pb48Bi56S132
Group 4 - Oxides and Hydroxides
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Quartz4.DA.05SiO2
β“˜Rutile4.DB.05TiO2
β“˜Anatase4.DD.05TiO2
β“˜Brookite4.DD.10TiO2
β“˜Aeschynite-(Y)4.DF.05(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Group 5 - Nitrates and Carbonates
β“˜Synchysite-(Ce)5.BD.20cCaCe(CO3)2F
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Gypsum7.CD.40CaSO4 Β· 2H2O
β“˜Bassanite7.CD.45Ca(SO4) Β· 0.5H2O
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Xenotime-(Y)8.AD.35Y(PO4)
Group 9 - Silicates
β“˜Zircon9.AD.30Zr(SiO4)
β“˜Titanite9.AG.15CaTi(SiO4)O
β“˜Gadolinite-(Y)9.AJ.20Y2Fe2+Be2Si2O10
β“˜Allanite-(Ce)9.BG.05b(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
β“˜Albite9.FA.35Na(AlSi3O8)
Unclassified
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜'Clinozoisite-Epidote Series'-
β“˜'K Feldspar'-

List of minerals for each chemical element

HHydrogen
Hβ“˜ Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Hβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Hβ“˜ BassaniteCa(SO4) · 0.5H2O
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Hβ“˜ GypsumCaSO4 · 2H2O
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
BeBeryllium
Beβ“˜ Gadolinite-(Y)Y2Fe2+Be2Si2O10
CCarbon
Cβ“˜ Synchysite-(Ce)CaCe(CO3)2F
OOxygen
Oβ“˜ Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Oβ“˜ AnataseTiO2
Oβ“˜ BassaniteCa(SO4) · 0.5H2O
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oβ“˜ BrookiteTiO2
Oβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Oβ“˜ Gadolinite-(Y)Y2Fe2+Be2Si2O10
Oβ“˜ GypsumCaSO4 · 2H2O
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ QuartzSiO2
Oβ“˜ RutileTiO2
Oβ“˜ Synchysite-(Ce)CaCe(CO3)2F
Oβ“˜ TitaniteCaTi(SiO4)O
Oβ“˜ Xenotime-(Y)Y(PO4)
Oβ“˜ ZirconZr(SiO4)
FFluorine
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fβ“˜ Synchysite-(Ce)CaCe(CO3)2F
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
MgMagnesium
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
AlAluminium
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Siβ“˜ Gadolinite-(Y)Y2Fe2+Be2Si2O10
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ QuartzSiO2
Siβ“˜ TitaniteCaTi(SiO4)O
Siβ“˜ ZirconZr(SiO4)
PPhosphorus
Pβ“˜ Xenotime-(Y)Y(PO4)
SSulfur
Sβ“˜ BassaniteCa(SO4) · 0.5H2O
Sβ“˜ CannizzaritePb48Bi56S132
Sβ“˜ GalenaPbS
Sβ“˜ GypsumCaSO4 · 2H2O
Sβ“˜ PyriteFeS2
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-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Caβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Caβ“˜ BassaniteCa(SO4) · 0.5H2O
Caβ“˜ GypsumCaSO4 · 2H2O
Caβ“˜ Synchysite-(Ce)CaCe(CO3)2F
Caβ“˜ TitaniteCaTi(SiO4)O
TiTitanium
Tiβ“˜ Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Tiβ“˜ AnataseTiO2
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiβ“˜ BrookiteTiO2
Tiβ“˜ RutileTiO2
Tiβ“˜ TitaniteCaTi(SiO4)O
FeIron
Feβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feβ“˜ Gadolinite-(Y)Y2Fe2+Be2Si2O10
Feβ“˜ MagnetiteFe2+Fe23+O4
Feβ“˜ PyriteFeS2
YYttrium
Yβ“˜ Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
Yβ“˜ Gadolinite-(Y)Y2Fe2+Be2Si2O10
Yβ“˜ Xenotime-(Y)Y(PO4)
ZrZirconium
Zrβ“˜ ZirconZr(SiO4)
NbNiobium
Nbβ“˜ Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6
CeCerium
Ceβ“˜ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Ceβ“˜ Synchysite-(Ce)CaCe(CO3)2F
PbLead
Pbβ“˜ CannizzaritePb48Bi56S132
Pbβ“˜ GalenaPbS
BiBismuth
Biβ“˜ CannizzaritePb48Bi56S132
ThThorium
Thβ“˜ Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6

Fossils

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

Kipfer, A., and Stuker, P. (1979) Mineralien an dem Rotondogranit, TI. Schweizer Strahler, 5, 45-91.
Stalder, H. A., Wagner, A., Graeser, S., and Stuker, P. (1998) Mineralienlexikon der Schweiz. Verlag Wepf & Co. AG, Basel, 579 pages.
LΓΌtzenkirchen, V., and Loew, S. (2011) Late Alpine brittle faulting in the Rotondo granite (Switzerland): deformation mechanisms and fault evolution. Swiss Journal of Geosciences, 104, 31–54.
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