Manuel-Mercedes open pit, Cala Mines, Cala, Huelva, Andalusia, Spain
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|Location is approximate, estimate based on other nearby localities.|
|Latitude & Longitude (WGS84):||37° North , 6° West (est.)|
|Margin of Error:||~96km|
|Other regions containing this locality:||Iberian Peninsula|
|Köppen climate type:||Csa : Hot-summer Mediterranean climate|
|Name(s) in local language(s):||Corta Manuel-Mercedes, Minas de Cala, Cala, Huelva, Andalucia, España|
From a geological point of view, the deposit of the Cala Mine is located in the south flank of the (antiform) Olivenza-Monesterio, inside of the zone Ossa-Morena. In this area, Palaeozoic rocks were affected by Hercynian tectonics. The granitic intrusions were accompanied by contact metamorphism (skarn formation) with important deposits of magnetite.
Cala is included in Sierra de Aracena range, a part of Sierra Morena range.
Recent analysis (XRD) have confirmed again the presence of ferropargasite in this locality (green sprays as seen in the pictures). It must be said that there is no a complete certainty because with complex amphiboles like these further analysis would be neccessary (Polarised-light microscopy and EPMA).
28 valid minerals.
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- Econ Geol (1981) 76:719-727
- García, M., García, G. and Calvo, M. (2003) Minas de Cala. El hierro con cobre. Bocamina (12), 48-81
- Calvo, M. (2003) Minerales y Minas de España, Vol 2. Diputación Foral de Alava. 705 pages.