The Jacob occurrence is located approximately 13 kilometres southwest of Topley Landing and 2 kilometres east of Lennac Lake.

Regionally, the area is underlain by Lower Jurassic Hazelton Group (Telkwa Formation) volcanics composed of andesite, andesitic to rhyolitic tuff, breccia, minor argillite and conglomerate and dips gently northeast. The volcanics are intruded by an Early Tertiary quartz diorite porphyry stock and related biotite quartz diorite porphyry dikes that trend northeast. East of the property, Triassic Takla Group volcanics discordantly overlie the Hazelton Group. The Takla rocks are composed of chert, volcanic and sedimentary breccia, massive dacite to andesite flows and tuff. North of the property, Cretaceous sediments overlie the Hazelton Group. South of the property, the Hazelton Group is overlain by Tertiary Ootsa Lake and Endako groups volcanic rocks. Small granodioritic stocks of the Late Cretaceous Bulkley Plutonic Suite are mapped in the immediate vicinity of the Jacob showing.

Locally, Hazelton Group volcanics composed of andesite, tuff and breccia are intruded by Jurassic Topley Intrusions composed of granodiorite and associated biotite feldspar porphyry. The andesite is chloritized and pyritized and hosts minor magnetite and traces of chalcopyrite in the fractures. Bleached and sericitic interbedded tuffs host disseminated pyrite. Intrusion-associated quartz veining and quartz-carbonate stringers host pyrite with minor chalcopyrite, molybdenite and bornite. Traces of magnetite and sphalerite were noted in some quartz-carbonate stringers.

In 1974, British Newfoundland Exploration Ltd. drilled three diamond-drill holes totalling 180 metres. In 1976, the company drilled an additional eleven percussion-drill holes totalling 450 metres (Assessment Report 22181).

Six two-post legacy claims were staked over the Southeast zone (093L 338) in September 2004 by D.G. MacIntyre and V.H. Parsons of Victoria. Additional claims to cover the original Thezar and Jacob showings were added in 2005 when electronic staking was inaugurated.

In 2012, an aeromagnetic program was conducted over the Flute and Lannac properties by Riverside Resources (BC) Inc. The total covered area was 813 square kilometres and the total survey line coverage was 4444 line kilometres (Assessment Reports 33032, 33707F). The Jacob occurrence was covered by this survey.

In 2017, Rich River Exploration Ltd. completed a program of geochemical (tree bark, rock and soil) sampling on the Lennac Lake property.

Refer also to Lennac property occurrences Thezar 81 (East) (093L 191), Thezar 75 (West), and Suratt (Southeast) (093L 338).