Sulfide orebodies at Yauricocha, central Peru; replacements of organic reefs?

The Catas ore body at the Yauricocha mine consists essentially of a core of dense, massive pyrite separated from the Cretaceous limestone host rock by a zone containing fragments of the dense pyrite in a matrix of friable, sandy-textured pyrite. Relic sedimentary structures and textures in the sulfide mass suggest that the ore has replaced the core and surrounding talus of an organic reef complex.

This record provided courtesy of AGI/GeoRef.