Peter Pear Zone
The Peter Pear zone is poorly exposed in a scree covered avalanche chute about 0.8 kilometers (0.5 miles) upstream of the Base Metal breccia pipe on the east side of Emigrant Gulch. Although poorly exposed, workings are developed in a brecciated shear zone and are likely associated with a breccia pipe near the contact of a quartz monzonite porphyry dyke with the dacite porphyry of the Emigrant Stock. The US Geological Survey collected 27 samples principally from waste rock dumps in the Peter pear area that contained a maximum of 0.05 opt gold (1.71 gms/T), 32.3 opt Silver (1,107.4 gms/T), 0.4% copper and 0.102% molybdenum.
Two holes were drilled by Pegasus (DU- 91-14 and DU-91-15) from a single drill pad in the Peter Pear area. Drill and surface mapping by Pegasus (1993) indicate that the Peter Pear breccia pipe is centered on at least one and probably two intrusive masses that are on the order of several hundred feet thick and consist of altered quartz monzonite porphyry with abundant intrusion breccias. Hydrothermal brecciation is widespread in drill core. Assay data from hole DU91-14 reported 18.29 meters (60 feet) of 0.225% copper and 78 ppm (0.0078%) molybdenum from the 21.34 to 39.62 meter (70-130 feet) interval in the hole.