The Talcuna Cu-Mn Mining District is about 35 km NE of La Serena.
References:- Oyarzun, R., Ortega, L., Sierra, J., Lunar, R., and Oyarzun, J. (1998): Cu, Mn, and Ag mineralization in the Quebrada Marquesa Quadrangle, Chile: the Talcuna and Arqueros districts. Mineralium Deposita 33, 547-559.
- Maksaev, V., Townley, B., Palacios, C., and Camus, F. (2007): Metallic ore deposits. In: Moreno, T., and Gibbons, W. (editors): The Geology of Chile. The Geological Society (London), pp. 414.
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http://www.ucm.es/info/crismine/IV_Region_Chile.htm 88 entries listed. 28 valid minerals.