The Bob occurrence is located within the Bob claims (Assessment Report 5202), approximately 1 kilometre southwest of Asitka Peak and 15 kilometres west of Johanson Lake.

The regional geology is similar to that of the A-4 occurrence (094D 087), which is approximately 3 kilometres to the northeast.

Locally, the area is underlain by the Upper Triassic Savage Mountain Formation (Takla Group). This formation consists of greenish to red-brown intermediate porphyritic flows, chloritic tuffs and agglomerates, and minor intercalated epiclastic sediments. These stratified rocks are intruded by the Early Jurassic Asitka Peak stock. The stock ranges from hornblende and/or biotite granodiorite to quartz diorite. These rocks are cut by mafic dykes, generally less than 3 metres thick, which are finely feldspar porphyritic (Assessment Report 5202).

In 1974, Nomad Mines Limited observed chalcopyrite occurring in malachite-stained volcanic rocks on their Bob claim. This occurs southwest of a local northwest trending shear (Assessment Report 5202).

In 1991, International Corona collected 2 samples in the Bob occurrence area on their Sit 6 claim. Sample 64517 was reported to be a 1 metre "grab sample" that assayed 1.38 per cent copper, 0.74 gram per tonne gold and 3.3 grams per tonne silver (Assessment Report 22018). The sample was described as a rusty, silicious and fractured feldspar porphyry with malachite and pyrite.

See A-4 (094D 087) for related geological information and for work history details, especially relating to 1974 and 1991.