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Rio de Frades Mines, Cabreiros, Arouca, Aveiro District, Portugal

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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
Name(s) in local language(s):Couto Mineiro de Rio de Frades, Cabreiros, Arouca, Distrito de Aveiro, Portugal


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

Iberian Peninsula

Peninsula - 1,541 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


4 valid minerals.

Detailed Mineral List:

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

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Pyrite'2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
'Cassiterite'4.DB.05SnO2
'Quartz'4.DA.05SiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Scheelite'7.GA.05Ca(WO4)
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
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
AX2
Cassiterite4.4.1.5SnO2
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals for each chemical element

OOxygen
O CassiteriteSnO2
O QuartzSiO2
O ScheeliteCa(WO4)
O Wolframite(Fe2+)WO4 to (Mn2+)WO4
SiSilicon
Si QuartzSiO2
SSulfur
S PyriteFeS2
CaCalcium
Ca ScheeliteCa(WO4)
MnManganese
Mn Wolframite(Fe2+)WO4 to (Mn2+)WO4
FeIron
Fe PyriteFeS2
Fe Wolframite(Fe2+)WO4 to (Mn2+)WO4
SnTin
Sn CassiteriteSnO2
WTungsten
W ScheeliteCa(WO4)
W Wolframite(Fe2+)WO4 to (Mn2+)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

Cambrian
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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