The North Brenda-Jeff 43 showing is located approximately 6.5 kilometres north of the Brenda openpit mine (MINFILE 092HNE047) and 25.5 kilometres northwest of Peachland.
The area is underlain by porphyritic quartz diorite of the Lower Jurassic Pennask Batholith, locally known as the Brenda stock. Alteration of quartz diorite is generally confined to fractures and to narrow alteration envelopes around those fractures. Four main alteration assemblages have been noted: quartz-hematite-pyrite, chlorite-epidote-potassium feldspar, biotite-chalcopyrite and chlorite.
Locally, a historical (1960s) trench is reported to expose chalcopyrite, malachite and molybdenite mineralization.
A report indicates that drilling located a mineralized breccia zone (Minister of Mines Annual Report 1967, page 205-206). The zone was thought to be acute in plan, concave to the west and narrowing to the north. It measured approximately 140 by 25 metres. The breccia is an explosive type developed in porphyritic quartz diorite with a biotite-rich matrix. The rock is cut by veins of quartz-microcline and quartz with epidote and calcite. Intense chlorite alteration occurs in and near the breccia, partly on numerous faults and shears, which also show sericitic and argillic alteration in places. Specular hematite, pyrite, chalcopyrite and molybdenite occur partly in the veins and fractures and partly disseminated in strongly altered rock.
In the 1960s, diamond drill holes are reported to have yielded intercepts including 0.23 per cent copper over 126.0 metres in DDH-24, 0.30 per cent copper and 0.014 per cent molybdenum over 68.1 metres in DDH-22 and 0.37 per cent copper over 35.1 metres in DDH-17 (Assessment Report 16750).
In 1987, drilling in the area of the historical drillholes is reported to have identified a zone of mineralization measuring approximately 200 by 100 metres with all holes located within this area yielding an average of 0.1 per cent copper or better, including drilling intercepts of 0.12 per cent copper and 0.008 per cent molybdenum over 87.0 metres in hole 8702 and 0.10 per cent copper with 0.004 per cent molybdenum over 88.5 (Assessment Report 16750).
Two other zones of mineralization, referred to as the Breccia No. 1 and No. 2 zones, are reported approximately 500 and 900 metres southwest of the Jeff 43 occurrence.
Work History
The occurrence was part of the extensive property holdings of Noranda Exploration Company Ltd. in the 1960s. Numerous trenches, roads, and drillholes were left in this general area by Noranda. The results of Noranda's exploration were not filed for assessment.
In 1966, Klen-Glen Mines Ltd. completed a program of geological mapping, soil sampling, trenching, 445.6 metres of diamond drilling, 671.3 metres of percussion drilling and a 59.2 line-kilometre induced polarization survey on the area as the Cam, Marn, Rob and Visc claims.
In 1967, Lakeland Base Metals completed a program of soil sampling on the area immediately east of the occurrence as the JO claims.
In 1970, Arrow Inter-America completed an airborne magnetic survey, totalling 752 line-kilometres, on the area as the Tic and Toc claims. During 1974 through 1976, Canadian Occidental Petroleum carried out geological mapping and rock and soil geochemical surveys on the area as the Tre claims.
In 1987, Brenda Mines Ltd. completed a program of geological mapping, soil sampling, ground magnetic and induced polarization surveys and drilled nine holes, totalling 723 metres, in the North Brenda–Jeff 43 area.
During 2006 through 2012, Bitterroot Resources completed programs of rock, silt and soil sampling, geological mapping, trenching, 147.6 line-kilometres of ground magnetic surveys and a 66.2 line-kilometre ground induced polarization survey on the area as the North Brenda property.
In 2019, C.J. Greig completed a soil sampling program on the area as the Trepanier property.
