The Big Zinc occurrence is located on the western side of a southern tributary of Sorenson Creek, approximately 2.5 kilometres southwest of the creek mouth.

The area is underlain by limestone and calcareous clastics of the Upper Triassic Vancouver Group, Quatsino Formation. Quartz diorite of the Late Jurassic Island Plutonic Suite intrudes the Quatsino carbonates.

Locally, a massive sphalerite occurrence is reported to occur in skarned rocks near the limestone-quartz diorite contact. Similar mineralization occurs about 3.2 kilometres to the southeast at the Peerless showing (MINFILE 092L 057).

About 4,500 tonnes of ore grading between 4.0 to 5.0 per cent zinc was reported to occur in surface exposures (Zeballos Development Corp., Marble River Project, 1974, Figure 2).

In 2017, a sample (J488624) from the Big Zinc zone yielded 1.43 per cent zinc (Assessment Report 37127).

Work History

In 1968, Alice Lake Mines completed a program of airborne geophysical surveys on the area. In 1989 and 1990, Equinox Resources, on behalf of Alice Lake Mines, completed programs of geochemical sampling on the area. During 2017 through 2019, Harco Holdings Ltd. completed minor programs of prospecting, geological mapping and rock sampling on the area as the Pilgrim property.