The Bellavista Zn-Ag mine is located on the Jaula Hill, about 45 km north of Vallenar, at 70°37.8′ south latitude and 28° 12.3′ west longitude (Fig. 1). This stratabound deposit occurs in a yellowish biocalcarenite which develops a reddish tone in the parts bearing more hematite. Microscopically, the manto is a biosparite with abundant reworked bioclasts, few volcanic rock clasts and opaque minerals in the matrix. Above and below the manto a reddish bed of chert appears. The manto runs along the western slope of the Jaula Hill for more than 1000 m with some interruptions. The lithology, content, and type of biogenic material along the manto remains fairly constant, indicating that the environment in which the ore-rich lenses were formed, while restricted in space, recurred as the sequence was deposited. A few vertical faults with less than a couple of meters of displacement are recognized.
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- The Bellavista Zn-Ag Mine, Copiapó Region, Chile
L. L. Diaz
- Springer Berlin Heidelberg