The Big Ben No. 3 vein occurrence is located along a former trail on the west side of the Zeballos River, approximately 220 metres north of Fault Creek.

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, a vein or silicified shear zone varies from 38 to 125 centimetres wide and strikes north 25 degrees west with a dip of 65 degrees east. Mineralization consists of disseminated pyrite and chalcopyrite.

In 1938, samples of vein material yielded up to 0.7 gram per tonne gold, 20.5 grams per tonne silver and 0.6 per cent copper over 1.25 metres (Property File - C.C. Starr [1938-05-03]: Report on the King Midas Mine).

In 1931, the area was explored as the Ehatset claims. In 1938, the King Midas Mining Co. Ltd. was operating on the property. In 1979, Esperanza Explorations completed a program of regional silt sampling and prospecting on the area. In 1999, the area was prospected by the Zeballos Mining Company as the Zeb Au claim. In 2009, Global Silver Producers Ltd. and A25 Gold Producers Corp. prospected the area.