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Alvarrões Mine, Seixo Amarelo, Guarda, Guarda, Portugali
Regional Level Types
Alvarrões MineMine
Seixo Amarelo- not defined -
Guarda- not defined -
GuardaDistrict
PortugalCountry

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Key
Latitude & Longitude (WGS84):
40° 26' 6'' North , 7° 20' 6'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Famalicão615 (2018)3.7km
Guarda32,111 (2013)12.8km
Sequeira28,502 (2018)16.1km
Teixoso4,703 (2018)16.9km
Manteigas3,900 (2014)17.7km
Name(s) in local language(s):
Mina de Alvarrões, Seixo Amarelo-Gonçalo-Vela, Guarda, Distrito da Guarda, Portugal


See http://www.mindat.org/photo-546298.html

Open pit mine, which explores aplito-pegmatitic veins with lepidolite for Li extraction.

According to personal comments of the current mine geologist, these veins are destined for the ceramic industry today and not for the extraction of lithium.


Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


13 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Habit: blocky crystals to 5mm
Colour: milky-white
Reference: Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Habit: tabular crystals/aggregates to less than 1mm
Colour: lemon-yellow
Reference: Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
Bertrandite
Formula: Be4(Si2O7)(OH)2
Habit: tabular to 6mm
Colour: clear colorless; white
Description: highly lustrous, usually growing on small quartz crystals, easily overlooked
Reference: Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
Beryl
Formula: Be3Al2(Si6O18)
Habit: aggregates to 20cm, recognizable faces are rare
Colour: opaque pinkish; pale blue
Reference: Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
Cassiterite
Formula: SnO2
Colour: brown-black
Description: grains to 2mm in feldspar
Reference: Pedro Alves collection. Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
Columbite-(Fe)
Formula: Fe2+Nb2O6
Reference: Jordi Fabre
Columbite-(Mn)
Formula: Mn2+Nb2O6
Habit: tabular to 4mm, striated
Colour: metallic black
Description: in feldspar, fragile
Reference: Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20 Ramos, F. (2007): Seixo Amarelo - Gonçalo rare element aplitic-pegmatitic field. In: Granitic pegmatites: the state of the art [locality No.5], Univ. Porto, Field trip guidebook mem. No.9, 72-86.
Elbaite
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Habit: single crystals commonly to 30mm, rarely to 80mm (diam. 9mm); radiating aggregates
Colour: pink; (rarely) colorless, pale yellow, green to blueish green, red
Reference: Martins da Pedra collection. Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
Fluorapatite
Formula: Ca5(PO4)3F
Habit: short prismatic to 4mm
Colour: opaque tan, rarely clear colorless
Description: on quartz
Reference: Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
'Herderite-Hydroxylherderite Series'
Habit: rounded crystals to 2mm
Colour: tan
Description: on quartz, with an etched appearance. So far noted from a single find.
Reference: Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
'Lepidolite'
Habit: fine-grained masses; single crystals to 50mm
Colour: colorless to violet
Reference: Pedro Alves collection. Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
'Liddicoatite' ?
Formula: Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Description: New nomenclature of the tourmaline group.
Reference: http://www.mindat.org/forum.php?read,25,298792,299262
'Microlite Group'
Formula: A2-mTa2X6-wZ-n
Description: Reported in other localities in the area of Seixo Amarelo and Gonçalo. Visual identification.
Reference: António Monteiro collection, August 2015.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Habit: masses; unconspicuous spherical aggregates to 5mm (on quartz)
Colour: pearl-white, yellowish-white
Description: António Martins photo: http://www.mindat.org/photo-563412.html
Reference: António Martins collection Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Habit: masses; unconspicuous spherical aggregates to 5mm (on quartz)
Colour: pearl-white, yellowish-white
Description: António Martins photo: http://www.mindat.org/photo-563412.html
Reference: António Martins collection Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
Quartz
Formula: SiO2
Habit: single crystals to 150mm; druze of small younger generation crystals (1-2mm)
Colour: colorless, milky white
Reference: Pedro Alves collection. Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
Topaz
Formula: Al2(SiO4)(F,OH)2
Colour: blueish
Reference: Pedro Alves collection. Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
Habit: tabular to less than 0.5mm
Colour: dark green
Description: with Autunite and Quartz in small bugs in feldspar
Reference: Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Reference: António Manuel Ináçio Martins photo & specimen. Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20
'Tourmaline var: Rubellite'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Pedro Alves collection. Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Cassiterite4.DB.05SnO2
Columbite-(Fe)4.DB.35Fe2+Nb2O6
Columbite-(Mn)4.DB.35Mn2+Nb2O6
'Microlite Group'4.00.A2-mTa2X6-wZ-n
Quartz4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
Autunite8.EB.05Ca(UO2)2(PO4)2 · 11H2O
Fluorapatite8.BN.05Ca5(PO4)3F
Torbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
Bertrandite9.BD.05Be4(Si2O7)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
Elbaite9.CK.05Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
'Liddicoatite' ?9.CK.05Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Topaz9.AF.35Al2(SiO4)(F,OH)2
Unclassified Minerals, Rocks, etc.
'Herderite-Hydroxylherderite Series'-
'Lepidolite'-
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z
'var: Rubellite'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
AX2
Cassiterite4.4.1.5SnO2
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
A2B2O6(O,OH,F)
'Microlite Group'8.2.2.1A2-mTa2X6-wZ-n
AB2O6
Columbite-(Fe)8.3.2.2Fe2+Nb2O6
Columbite-(Mn)8.3.2.4Mn2+Nb2O6
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Autunite40.2a.1.1Ca(UO2)2(PO4)2 · 11H2O
Torbernite40.2a.13.1Cu(UO2)2(PO4)2 · 12H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
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
Topaz52.3.1.1Al2(SiO4)(F,OH)2
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Bertrandite56.1.1.1Be4(Si2O7)(OH)2
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Six-Membered Rings with borate groups
Elbaite61.3.1.8Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
'Liddicoatite' ?61.3.1.2Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
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)
Unclassified Minerals, Mixtures, etc.
'Herderite-Hydroxylherderite Series'-
'Lepidolite'-
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z
'var: Rubellite'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H TopazAl2(SiO4)(F,OH)2
H ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H AutuniteCa(UO2)2(PO4)2 · 11H2O
H BertranditeBe4(Si2O7)(OH)2
H TorberniteCu(UO2)2(PO4)2 · 12H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
LiLithium
Li ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Li LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
BeBeryllium
Be BertranditeBe4(Si2O7)(OH)2
Be BerylBe3Al2(Si6O18)
BBoron
B Tourmaline (var: Rubellite)A(D3)G6(T6O18)(BO3)3X3Z
B ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
B LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
O QuartzSiO2
O TopazAl2(SiO4)(F,OH)2
O Tourmaline (var: Rubellite)A(D3)G6(T6O18)(BO3)3X3Z
O CassiteriteSnO2
O ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O AlbiteNa(AlSi3O8)
O FluorapatiteCa5(PO4)3F
O AutuniteCa(UO2)2(PO4)2 · 11H2O
O BertranditeBe4(Si2O7)(OH)2
O BerylBe3Al2(Si6O18)
O Columbite-(Mn)Mn2+Nb2O6
O TorberniteCu(UO2)2(PO4)2 · 12H2O
O Columbite-(Fe)Fe2+Nb2O6
O MuscoviteKAl2(AlSi3O10)(OH)2
O LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
FFluorine
F TopazAl2(SiO4)(F,OH)2
F FluorapatiteCa5(PO4)3F
NaSodium
Na ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Na AlbiteNa(AlSi3O8)
AlAluminium
Al TopazAl2(SiO4)(F,OH)2
Al ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al AlbiteNa(AlSi3O8)
Al BerylBe3Al2(Si6O18)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
SiSilicon
Si QuartzSiO2
Si TopazAl2(SiO4)(F,OH)2
Si ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si AlbiteNa(AlSi3O8)
Si BertranditeBe4(Si2O7)(OH)2
Si BerylBe3Al2(Si6O18)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
PPhosphorus
P FluorapatiteCa5(PO4)3F
P AutuniteCa(UO2)2(PO4)2 · 11H2O
P TorberniteCu(UO2)2(PO4)2 · 12H2O
KPotassium
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca FluorapatiteCa5(PO4)3F
Ca AutuniteCa(UO2)2(PO4)2 · 11H2O
Ca LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
MnManganese
Mn Columbite-(Mn)Mn2+Nb2O6
FeIron
Fe Columbite-(Fe)Fe2+Nb2O6
CuCopper
Cu TorberniteCu(UO2)2(PO4)2 · 12H2O
NbNiobium
Nb Columbite-(Mn)Mn2+Nb2O6
Nb Columbite-(Fe)Fe2+Nb2O6
SnTin
Sn CassiteriteSnO2
TaTantalum
Ta Microlite GroupA2-mTa2X6-wZ-n
UUranium
U AutuniteCa(UO2)2(PO4)2 · 11H2O
U TorberniteCu(UO2)2(PO4)2 · 12H2O

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Fuchs, A., Fuchs, R.: Rosaroter Elbait aus der Serra de Estrela, Portugal, Lapis vol.39, 03/2014, 12-20

Other Regions, Features and Areas containg this locality

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