Douglas

United States· MaineUnknown
Contained Copper
—
Average Grade
5.80%
Deposit Type
VMS — Bimodal-Mafic
Discovery Year
1878

Overview

Massive sulfides, 3.7-6 m thick, 75 m depth, at least 23 m along strike.

Geological Context

Tectonic Setting: Pelite-mafic in mature oceanic backarc

Resources & Operations

Production Start: 1878

Data Provenance

Source: USGS MRDS