Around the junction of Bob and Buck creeks, bedrock consists of Lower Jurassic Hazelton Group volcanics of the Telkwa Formation comprised of andesitic to rhyolitic tuff flows and breccia. These are overlain by younger Francois Lake Group, Upper Cretaceous Tip Top Hill volcanics and Eocene Buck Creek volcanics. The Jurassic and Cretaceous volcanics are intruded by Bulkley Intrusive gabbro stock and associated feldspar porphyry dikes.

The Bob Creek canyon hosts hydrothermally altered volcanics with a large gossanous zone which is completely altered to an earthy mixture of sericite, kaolinite and limonite. These altered volcanics host mineralization (described in 093L 009, Bob Creek) and are considered to be the source of the placer gold since no gold was found in the stream above this zone.

A large tonnage of rimrock gravels were washed by hand mining methods and several grams of coarse angular gold with fine flakes were found near the foot of the canyon.

Work History

Messrs. MacDonald and Carter held leases on Bob and Buck creeks during the period 1929-1933 and tested thee ground by open cuts. A considerable yardage of rimrock gravels were washed by hand mining methods. Leases on Buck creek were held at that time by W.A. Johnston, of Prince George.

In the mid-1930s the two placer leases held by Messrs. MacDonald and Silverthorne were under option to G.W. Smith, who mined several ounces of coarse angular gold near the foot of the canyon. In 1937, 5 churn-drilled holes were put down, one reaching bedrock at a depth of 12 metres and averaging 50 cents a yard from surface; the remaining holes were stopped at 15 metres without striking bedrock.

Refer to Bob Creek (093L 009) for further details of the area work history.

In 2011 an aeromagnetic survey was conducted over the region which included the Bob Creek Placer prospect (Assessment Reports 33176, 34048).