Overview

Sediment-hosted stratiform Cu in the Nonesuch Shale. Keweenaw Peninsula.

Geological Context

Host Rock: Shale and sandstone (Neoproterozoic)

Tectonic Setting: Intracratonic rift

Geological Province: Midcontinent Rift

Metallogenic Belt: Keweenaw Copper District

Operator: 0

Mining Method: Underground

Production Start: 1953

Source: USGS; Mauk et al. (1992) | coordinate: Mindat

Last Verified: 2025-12-01

References: