The Yauco No. 2 (L.1671) occurrence is located on an east-facing slope, west of the Zebellos River and approximately 300 metres northwest of its junction with the Nomash River.

Regionally, the area is underlain by Upper Triassic to Lower Jurassic Bonanza Group basaltic to rhyolitic volcanic rocks. Conformably underlying the Bonanza volcanic rocks are limestones and limy clastics of the Triassic to Lower Jurassic Parson Bay Formation (Bonanza Group) and Upper Triassic Quatsino Formation (Vancouver Group), and the tholeiitic basalts of the Upper Triassic Karmutsen Formation (Vancouver Group). Dioritic to granodioritic plutons of the Zeballos intrusion phase of the Jurassic Island Plutonic Suite have intruded all older rocks. The Zeballos stock, a quartz diorite phase of the Eocene to Oligocene Mount Washington Plutonic Suite, is spatially related to gold-quartz veining in the area. Bedded rocks are predominantly northwest-striking, southwest-dipping and anticlinally folded about a northwest axis. A north-south–striking fault occurs along the Zeballos River valley, north of the rivers junction with the Nomash River.

Locally, altered basalts of the Karmutsen Formation host disseminated pyrite, pyrrhotite and chalcopyrite within fractured zones.

In 1988, a rock sample (EQ-SB-R1) assayed 0.51 gram per tonne gold, 7.0 grams per tonne silver and 0.809 per cent copper (Assessment Report 17376).

In 1975, Diana Explorations Ltd. completed 11.0 line-kilometres of ground electromagnetic and magnetic surveys on the area. In 1988, Equus Petroleum Corp. completed a program of rock and soil sampling and a ground magnetic survey on the area as the Gold Rock claims. In 1993, Equus completed a 5.0 line-kilometre ground electromagnetic survey on the Gold Rock claims.

In 1999, the area was prospected by the Zeballos Mining Company as the Zeb Au claim. In 2003, Canalska Ventures Ltd. completed a regional program of rock, silt and soil sampling on the area.