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Las Herrerías, Sierra Almagrera, Cuevas del Almanzora (Cuevas de Vera), Almería, Andalusia, Spain
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Latitude: 37°16'12"N
Longitude: 1°47'38"W
Name(s) in local language(s): Las Herrerías, Sierra Almagrera, Cuevas del Almanzora (Cuevas de Vera), Almería, Andalucía, España

The site of Las Herrerias an important mining center in which over several centuries have succeeded mining labors for the extraction of minerals at the time was the most important exploitation of Spain for Baritine.

The mines are located practically in the town of Las Herrerias which was created around them the most important being the large open pit exploitation called Santa Matilde currently practically disappeared having been filled.

Mineralization consists of Fe and Mn oxides, sulphides, Native Silver and Barite primarily with an arrangement in beds in veins and pipes and dissemination zones including in marine sedimentary materials of Miocene age.

The mineralized zone forms a somewhat elevated structure defined by a series of failures and also with an interior network failures in the form of "Horst".

The genesis of the deposit is related to submarine hydrothermal processes (blak smoker) which formed the deposition of the mineralization in the form of beds and fumarolic structures (pipes) being the network of faults the way of escape of the fluids.

This process apparently would be connected with the location of a sub-volcanic dome located just below the sites.

The site is famous for the samples of Native Silver of its variety rich in Mercury (Kongsbergite)

Mineral List

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

20 entries listed. 19 valid minerals.

Localities in this Region


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- Calderon, S. (1910). Los Minerales de España, Junta para Ampliación de Estudios e Investigaciones Científicas. Madrid. Volumen 1, 416 págs.

- Martínez Frías, J., García Guinea, J. López Ruiz, J. López García, J. y Benito , R. (1989). Las mineralizaciones epitermales de Sierra Almagrera y de la cuenca de Herrerías (C.Béticas). Bol. Soc. Esp. Miner., 12 : 261-271

- Lopez Gutierrez, J., Martínez Frías, J., Lunar, R. y Lopez García, J.A. (1992). Geología y control tectónico de la mineralización hidrotermal submarina de Herrerías (C. Béticas). III Cong. Esp. y VIII Cong. Lat. Geol. Salamanca. Actas Tomo 3: 181-186.

- Lopez Gutierrez, J., Martínez Frías, J., Lunar, R. y Lopez García, J.A. (1993). El Rombohorst mineralizado de las Herrerías: Un caso de "Doming" e hidrotermalismo submarino Mioceno en el SE Ibérico. Estudios Geol.,49 : 13-19

- Martínez Frías J. y Benito, R. (1993). Caracterización Geoquímica de lso depósitos ferromanganesíferos de las Herrerias (SE Ibérico). Geogaceta, 14 : 150-152.

- Calvo, M. (2003): Minerales y Minas de España. Vol. I, Elementos. Museo de Ciencias Naturales de Álava, 217 pp

- Calvo, M. (2014) "Minerales y Minas de España", Vol. VI (Sulfatos (seleniatos, teluratos),cromatos,molibdatos y wolframatos). Escuela Técnica Superior de Ingenieros de Minas. Madrid.

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