|Regional Level Types|
|La Collada mining area||Area|
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Latitude & Longitude (WGS84):
43° North , 5° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
Köppen climate 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 TypeStandard Detailed Strunz Dana Chemical Elements
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded from this region.
Mineral ListMineral list contains entries from the region specified including sub-localities
12 valid minerals.
Detailed Mineral List:
List of minerals arranged by Strunz 10th Edition classification
|Group 2 - Sulphides and Sulfosalts|
|Group 3 - Halides|
|Group 4 - Oxides and Hydroxides|
|Group 5 - Nitrates and Carbonates|
|Group 7 - Sulphates, Chromates, Molybdates and Tungstates|
List of minerals arranged by Dana 8th Edition classification
|Group 2 - SULFIDES|
|AmXp, with m:p = 1:1|
|AmBnXp, with (m+n):p = 1:1|
|AmBnXp, with (m+n):p = 1:2|
|Group 4 - SIMPLE OXIDES|
|Group 9 - NORMAL HALIDES|
|Group 14 - ANHYDROUS NORMAL CARBONATES|
|Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN|
|Group 28 - ANHYDROUS ACID AND NORMAL SULFATES|
|Group 75 - TECTOSILICATES Si Tetrahedral Frameworks|
|Si Tetrahedral Frameworks - SiO2 with  coordinated Si|
List of minerals for each chemical element
Sort byYear (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.
Localities in this Region
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