Red Dog (ARDF #DL001) Ag, Pb, Zn USGS
Sphalerite and galena occur in silica rock, barite and shale. Sulfides are disseminated, semimassive to massive, and rarely laminated. Late crosscutting sulfide veins and stringers occur in the host shale and occasionally in the exhalites. ... primarily due to increased mill throughput as softer ores were processed. The zinc grade was ...