Homestake

Overview

3 stacked lenses, up to 10 m thick. 2 lenses are exposed on the surface. Island arc (calc-alkaline). Höy (1987) classified this as a seamount type deposit. Original resource 0.254 million t @ 0.28% Cu, 2.23% Zn, 1.27% Pb, 0.6 g/t Au, 257 g/t Ag. Recent proven reserves 1.011 million t @ 0.55% Cu, 4.0% Zn, 2.5% Pb, 240 g/t Ag; not fully explored.

Geological Context

Tectonic Setting: Bimodal-felsic in epicontinental arc

Resources & Operations

Production Start: 1893

Data Provenance

Source: USGS MRDS