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Josefa-Veneros vein (Josefa-Veneros Norte vein), Coroña de Arriba-La Collada, La Collada mining area, Siero, Asturias, Spaini
Regional Level Types
Josefa-Veneros vein (Josefa-Veneros Norte vein)Vein
Coroña de Arriba-La Collada- not defined -
La Collada mining areaArea
Siero- not defined -
AsturiasAutonomous Community
SpainCountry

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Key
Latitude & Longitude (WGS84):
43° 26' 8'' North , 5° 37' 50'' West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~0km
Locality type:
Name(s) in local language(s):
Filón Josefa-Veneros (Filón Josefa-Veneros Norte), Coroña de Arriba-La Collada, Zona minera de la Collada, Siero, Asturias, España


According the book: "La Fluorita. Un Siglo de Minería de Asturias" it is more accurate to use the name Josefa-Veneros vein instead the Josefa-Veneros Norte vein. The old name is kept in brackets because it has been widely used (both in collections and in literature).

JOSEFA-VENEROS VEIN

This vein is basically parallel to the Collada vein. Its production began in the 1920s, initially at the northern end via an open pit within the Basurto claim and then, circa 1940, from the southern end, in the outskirts of la Collada, by the “La Audacia Minera” company via the “Josefa” Mine (43º 25’ 59,10’’ N; 5º 37’ 22,86’’ W).

During the 1960s the rights to these mining properties were leased to Fluoruros S.A. This company increased the level of activity by opening the Veneros-Sur open pit (43º 25’ 54,54’’ N; 5º 37’ 30,66’’ W), the Coroña shaft, (43º 26’ 8,04’’ N; 5º 37’ 51,20’’ W) and also by opening the connecting gallery on the 75 level of the mine between the Collada and Josefa veins. The Josefa mine was also re-named Veneros mine.

The mineralogical characteristics of the Josefa-Veneros vein are similar to the Collada vein, presenting the classical paragenesis of Fluorite-Calcite and from time to time the traces of small amounts of sulfides, pyrites, etc...

In the Coroña shaft area (north of this vein) there is a greater frequency of scalenohedral calcite, with samples that reach up to 25 cm. The color of these scalenohedrons vary from clay-white to transparent amber. The samples of fluorite that appear here are small cubes with less than 1 cm edge. As one heads south the size of the calcite diminishes and there is an increase in the size of the groups of fluorite cubes which are of a blue-violet color and that culminate in the famous "pockets" found within the level 75 connecting gallery with their crystals of fluorite over calcite showing a combination of cubes and dodecahedron, which in some cases present a lighter or clearer color on the faces of the cubes and a more intense color in the faces of the rombododecahedron. This makes them very attractive.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

5 valid minerals.

Detailed Mineral List:

Calcite
Formula: CaCO3
Description: Large crystals associated to fluorite
Reference: Calvo, Miguel. (2012). Minerales y Minas de España. Vol. V. Carbonatos y Nitratos. Boratos. Escuela Técnica Superior de Ingenieros de Minas de Madrid. Fundación Gómez Pardo. 711 págs.
Chalcopyrite
Formula: CuFeS2
Reference: Jordi Fabre
Fluorite
Formula: CaF2
Reference: Calvo, Miguel. (2006). Minerales y Minas de España. Vol. III. Halogenuros. Museo de Ciencias Naturales de Alava. Vitoria. 267 págs.
Pyrite
Formula: FeS2
Reference: Jordi Fabre
Quartz
Formula: SiO2
Reference: Jordi Fabre

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
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

CCarbon
C CalciteCaCO3
OOxygen
O CalciteCaCO3
O QuartzSiO2
FFluorine
F FluoriteCaF2
SiSilicon
Si QuartzSiO2
SSulfur
S ChalcopyriteCuFeS2
S PyriteFeS2
CaCalcium
Ca FluoriteCaF2
Ca CalciteCaCO3
FeIron
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2

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)

Localities in this Region

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