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Rio de Frades Mines, Cabreiros, Arouca, Aveiro, Portugali
Regional Level Types
Rio de Frades MinesGroup of Mines
Cabreiros- not defined -
Arouca- not defined -

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Name(s) in local language(s):Couto Mineiro de Rio de Frades, Cabreiros, Arouca, Distrito de Aveiro, Portugal
Latitude & Longitude (WGS84): 40° 51' 57'' North , 8° 11' 24'' West
Latitude & Longitude (decimal): 40.86600,-8.19005
GeoHash:G#: ez60mxkjw
Locality type:Group of Mines
Köppen climate type:Csb : Warm-summer Mediterranean climate
Nearest Settlements:
Macieira de Cambra4,909 (2018)15.4km
São Pedro do Sul4,080 (2014)15.8km
Vale de Cambra7,649 (2014)17.2km
Castro Daire4,744 (2018)21.8km
Vila Chã4,295 (2018)23.2km

Inactive tin-tungsten mines.

The first local wolfram/tungsten mines were demarcated on May 6th, 1914. The exploitation of these mines, during the World Wars period, was carried out by Companhia Mineira do Norte de Portugal, owned by the Germans. Among the several mines in this region Vale da Cerdeira mine, located in an abrupt river slope about 1 km from the village, was the most important of them.

Rather curious is the fact that during the Second World War period, Arouca was the only place where the British and the Germans lived together peacefully - the Germans exploiting the tungsten in Rio de Frades (Companhia Mineira do Norte de Portugal) and the British in Regoufe (Companhia Portuguesa de Minas).

Separated by five kilometers (less than four miles), Rio de Frades and Regoufe were not symbolic by their mines dimension but because for five years the warring factions lived peacefuly in a forgotten place in Portugal, while making war throughout Europe.

Regions containing this locality

Eurasian PlateTectonic Plate
Iberian PeninsulaPeninsula

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

4 valid minerals.

Detailed Mineral List:

Formula: SnO2
Reference: Siorminp database
Formula: FeS2
Reference: Rui Nunes collection
Formula: SiO2
Reference: Rui Nunes collection
Formula: Ca(WO4)
Reference: INETI, secção de S. Mamede Infesta (ex. Instituto Geológico e Mineiro) collection
Formula: (Fe2+)WO4 to (Mn2+)WO4
Reference: Siorminp database

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Group 4 - Oxides and Hydroxides
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Unclassified Minerals, Rocks, etc.
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Mixtures, etc.
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals for each chemical element

O CassiteriteSnO2
O Wolframite(Fe2+)WO4 to (Mn2+)WO4
O ScheeliteCa(WO4)
O QuartzSiO2
Si QuartzSiO2
S PyriteFeS2
Ca ScheeliteCa(WO4)
Mn Wolframite(Fe2+)WO4 to (Mn2+)WO4
Fe Wolframite(Fe2+)WO4 to (Mn2+)WO4
Fe PyriteFeS2
Sn CassiteriteSnO2
W Wolframite(Fe2+)WO4 to (Mn2+)WO4
W ScheeliteCa(WO4)

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

485.4 - 541 Ma

ID: 3193156
Paleozoic sedimentary rocks

Age: Cambrian (485.4 - 541 Ma)

Lithology: Sedimentary 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]

Middle Cambrian - Neoproterozoic
501 - 1000 Ma

ID: 3161340
Xisto-Grauvaquico Complex

Age: Neoproterozoic to Cambrian (501 - 1000 Ma)

Stratigraphic Name: Xisto-Grauvaquico Complex

Description: flysch (sediments)

Lithology: Shale/slate

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

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