Holden

Overview

Production 9.1 million t @ 1.06% Cu, 0.2% Zn, 6.9 g/t Ag, 2.1 g/t Au. Mine closed in 1957 because of high operating cost; an unknown amount of reserves remain. Mostly disseminated ore, local massive ore. Stratigraphy is overturned, but corrected in our rocks fields. Assays: 0.2-0.16% Ni, 0.19% U3O8 equivalent in one sample.

Geological Context

Tectonic Setting: Siliciclastic-felsic in mature epicontinental arc

Resources & Operations

Production Start: 1938

Data Provenance

Source: USGS MRDS