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La Collada mining area, Siero, Asturias, Spaini
Regional Level Types
La Collada mining areaArea
SieroMunicipality
AsturiasAutonomous Community
SpainCountry

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Key
Latitude & Longitude (WGS84):
43° North , 5° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~12km
Locality type:
Name(s) in local language(s):
Zona minera de La Collada, Siero, Asturias, España


The first references to the existence of Fluorite in La Collada mining area go back to 1904. In that year its discoverer, Felipe Valdés Menéndez-Corvera, during the construction of the track centre of a coal train between the village of Lieres and Gijon Port, cut several mineral veins that crossed La Collada. He sent a letter offering a partnership in this find to another prominent Spanish industrialist, Victor Felgueroso, closely related to coal mining.
Development of the early mining works was done on La Collada vein, in the area called 'La Collada de atrás'. Simultaneously, open workings took place at different nearby sites, since the only legal requirement at that time for this type of mining, was to be owner of the property subject to exploitation. Thus, several mines were under way in this area: 'Basurto' in 'Coroña de Arriba', 'Florentina' in 'Muñó', etc. From the 1930s a more thorough exploitation began. On the one hand the Valdés Cores family started the workings in 'Josefa', located inside the 'Audacia 3ª bis' concession. On the other hand, a bit later, in 1941, La Collada Mine was mined by Fluoruros S.A., a company founded by Angel Pérez de Leza in that year, on concessions also leased from the Valdés family where the Collada vein was located. From 1945 onwards La Audacia Minera company, owned by Félix Cifuentes, operated two new open pits: the well-known La Viesca and Baldomón, in the surroundings of the village with the same name. By the year 1975 drilling in the Coroña pit began, through which Fluoruros would exploit the northest part of the Josefa-Veneros vein.
The whole group of mines is complemented by smaller ones, located in the area close to the two main veins, Josefa-Veneros and La Collada. The most important one was Veneros Sur open pit, dug in the southern end of the mentioned vein.
The great mining development of the La Collada area implied the comissioning of two treatment plants by gravity with manual fluting. One of them, 'La Audacia Minera', with modest production, and very near another plant, 'Fluoruros S.A.', the largest one, which lasted until the demise of the company in 1978.
From a mineralogical point of view, La Collada mining area has two main features. Firstly and common for the whole area is the association between Fluorite and Calcite, and the second characteristic, distinct and prevailing to the South (Josefa Veneros, 75 level) is the ocurrence of Fluorite crystals with combinations of cube and dodecahedron. Further north, in La Viesca, simple forms like the cube predominate, although there are also much less frequently other more complex crystals.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

12 valid minerals.

Detailed Mineral List:

Baryte
Formula: BaSO4
Reference: Calvo, Miguel. (2014). Minerales y Minas de España. Vol. VI. Sulfatos (Seleniatos, Teluratos), Cromatos, Molibdatos y Wolframatos. Escuela Técnica Superior de Ingenieros de Minas de Madrid. Fundación Gómez Pardo. 653 págs.
Calcite
Formula: CaCO3
Localities: Reported from at least 6 localities in this region.
Chalcopyrite
Formula: CuFeS2
Cinnabar
Formula: HgS
Reference: Calvo, M. (2003) Minerales y Minas de España. Vol. II. Sulfuros y sulfosales. Museo de Ciencias Naturales de Alava. Vitoria. 705 págs.
Dolomite
Formula: CaMg(CO3)2
Reference: Manuel Gutierrez Claverol, Carlos Luque Cabal, Jose Ramon Garcia Alvarez and Luis Miguel Rodriguez Terente (2009) La Fluorita - un siglo de mineria en Asturias. p155.
Fluorite
Formula: CaF2
Localities: Reported from at least 8 localities in this region.
Galena
Formula: PbS
Hematite
Formula: Fe2O3
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Manuel Gutierrez Claverol, Carlos Luque Cabal, Jose Ramon Garcia Alvarez and Luis Miguel Rodriguez Terente (2009) La Fluorita - un siglo de mineria en Asturias. p155.
Pyrite
Formula: FeS2
Quartz
Formula: SiO2
Sphalerite
Formula: ZnS

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Cinnabar2.CD.15aHgS
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Cinnabar2.8.14.1HgS
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

HHydrogen
H MalachiteCu2(CO3)(OH)2
CCarbon
C CalciteCaCO3
C MalachiteCu2(CO3)(OH)2
C DolomiteCaMg(CO3)2
OOxygen
O QuartzSiO2
O CalciteCaCO3
O HematiteFe2O3
O MalachiteCu2(CO3)(OH)2
O DolomiteCaMg(CO3)2
O BaryteBaSO4
FFluorine
F FluoriteCaF2
MgMagnesium
Mg DolomiteCaMg(CO3)2
SiSilicon
Si QuartzSiO2
SSulfur
S PyriteFeS2
S ChalcopyriteCuFeS2
S GalenaPbS
S SphaleriteZnS
S BaryteBaSO4
S CinnabarHgS
CaCalcium
Ca FluoriteCaF2
Ca CalciteCaCO3
Ca DolomiteCaMg(CO3)2
FeIron
Fe PyriteFeS2
Fe ChalcopyriteCuFeS2
Fe HematiteFe2O3
CuCopper
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn SphaleriteZnS
BaBarium
Ba BaryteBaSO4
HgMercury
Hg CinnabarHgS
PbLead
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Gutiérrez, M., Luque, C., García, J.R. y Rodríguez, L.M. (2009). La Fluorita. Un Siglo de Minería de Asturias. Universidad de Oviedo.565 págs.
Calvo, M. (2006) Minerales y Minas de España. Vol. III. Halogenuros. Museo de Ciencias Naturales de Álava. 267 pp.

External Links

http://www.foro-minerales.com/forum/viewtopic.php?t=5067 (explanations about the complex structure of the area with maps, in Spanish language)

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