Mount Lyell

Overview

Pyrite-chalcopyrite-sphalerite-galena massive, pyrite-chalcopyrite dissemination, quartz-bornite and pyrite-chalcopyrite stringer. Orebodies: South Lyell, West Lyell, Royal, Tharsis, Comstock, Crown Lyell No. 1, Crown Lyell No. 2, Crown Lyell No. 3, North Lyell, Copper Clay, Cape Horn, Twelve West, Lyell Tharsis, Lyell Comstock, Blow, Tasman, Crown Lyell Extension, Crown Three. Tilting and erosion may have removed part of the deposit, which may explain the lack of lead and zinc deposits. Gossan present. Large alteration zone along a fault may have been a feeder zone for the mineralization. Extensional basin in an arc-continental collision zone.

Geological Context

Host Rock: Felsic volcanic rocks (Cambrian)

Tectonic Setting: Siliciclastic-felsic in mature epicontinental arc

Resources & Operations

Operator: 0

Mining Method: Underground

Production Start: 1896

Data Provenance

Source: USGS MRDS