The Discovery Creek (Annette 30) showing is located at the head waters of Welsh Creek, a tributary of Forster Creek.

The Cretaceous Horsethief Batholith intrudes Middle Proterozoic sediments of the Purcell Supergroup. The intrusion is zoned from fine-grained/medium-grained granodiorite to coarse-grained quartz monzonite. East trending aplite dykes cut the intrusion.

The local fine-grained granite has been heavily fractured. Two systems of joint surfaces are associated with mineralization: 1) 110 to 140 degrees, dipping 65 to 80 southwest; 2) 225 degrees, dipping 35 to 60 degrees northwest.

Thick rust covering 80 per cent of fracture surfaces is chocolate brown, commonly mixed with yellowish or reddish variations. Canary yellow ochre and kaolin white powder are also present. The host rock exhibits 10 to 20 per cent potassic alteration. Flakes of fine rosettes of molybdenite occur in vuggy quartz veins, 2.5 centimetres thick, and in greisen bands, 3.8 to 6.3 centimetres thick, that envelop the vuggy quartz veins. Most of the the quartz veins are developed along the joint system. The closest spacing between two mineralized veins is 15 metres. The width of the this zone is 90 metres. The greisen bands are composed mainly of quartz and mica (muscovite and/or sericite). Disseminated pyrite cubes are abundant.

Ten grab samples were collected in 1971. The values range from 0.018 to 0.046 per cent molybdenite (Assessment Report 3753, page 7).

Canadian Johns-Manville Company Limited staked and investigated a number of claims in the area in 1970, including the Slide, Annette and Blue. It is reported that 739 geochemical samples were taken in 1970 (Geology, Exploration and Mining in BC 1970, page 469). In 1971, Canadian Johns-Manville completed further geochemical, geological and geophysical surveys on its Slide group of claims (Geology, Exploration and Mining in BC 1971, page 426). In 1972, the company completed further surveys on its Slide group including mapping and geochemical sampling (Geology, Exploration and Mining in BC 1972, page 74). The company returned in 1973 and conducted further surveys including some detailed mapping on the Blue claims, (Geology, Exploration and Mining in BC 1973, page 92).