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Almadén Mine, Almadén, Almadén District, Ciudad Real, Castile-La Mancha, Spain

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Latitude & Longitude (WGS84): 38° 46' 31'' North , 4° 50' 51'' West
Latitude & Longitude (decimal): 38.77528,-4.84750
Other regions containing this locality:Iberian Peninsula
Köppen climate type:Csa : Hot-summer Mediterranean climate

A mercury mine started before 1850. Owned by Minas de Almadén.
Volcano-sedimentary Hg ores hosted in quartzite and volcanic rocks.

The name Almadén stems from the Arabic al-ma 'daniy 'yun, "the mine" or "the mineral".

Mineral List

26 valid minerals.

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

Late Ordovician - Middle Ordovician
443.8 - 470 Ma

ID: 2499618

Age: Ordovician (443.8 - 470 Ma)

Description: Slate, sandstone, quartzite and limestone or volcaniclastic rocks

Lithology: Quartzite, slate, sandstone and limestone

Reference: Mapa Geológico de la Península Ibérica, Baleares y Canarias a escala 1:1.000.000. Instituto Geológico y Minero de España. [77]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


- Mining Annual review (1985):119.
- Crawford, J.W. (1988). "Famous mineral localities: The Almaden mines Ciudad Real Spain." Mineralogical Record, 19(5), 297-302.
- Hall C. M., Higueras P. L., Kesler S. E., Lunar R., Dong H., Halliday A. N., 1997. Dating of alteration episodes related to mercury mineralization in the Almadén district. Earth Planet. Sci. Lett. 148, 287-298.
- Hernandez, A., Jébrak M., Higueras P., Oyarzun R., Morata D., Munhà J., 1999. The Almadén mercury mining district, Spain. Miner. Deposita, 34, 539-548.

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