The Brenda (Macintosh vein) occurrence is located on the western side of Sandown Creek, approximately 4 kilometres north west of the creek mouth on the Skookumchuck River.

The area is underlain by the Mesoproterozoic Purcell Supergroup, a thick succession of fine-grained terrigenous clastic, carbonate, and very minor volcanic rocks exposed in the core of the Purcell Anticlinorium

Locally, a fault-related quartz-siderite-barite vein is host to tetrahedrite (tennantite?), minor chalcopyrite and bornite mineralization. The host rocks are units of the Helikian Dutch Creek Formation (Purcell Supergroup) which are faulted phyllitic rocks and grey-green muscovite schist. The copper minerals occur as disseminations and patches of sulphides as well as forming thin selvages on cracks and partings within siderite and barite. The vein has been mapped for a length of 33 metres with widths varying from 1.8 to 5.4 metres.

There is a possibility that the (McIntosh) Brenda deposit is a stratiform deposit which has later been affected by faulting and remobilization of the barite mineralization.

In 1978, one grab sample assayed 1.27 per cent copper, 0.7 grams gold and 79 grams silver (Assessment Report 6886); while a high grade chip samples assayed up to 1.63 per cent copper, 92.6 grams per tonne silver and 1.03 grams per tonne gold (Assessment Report 7613).

In 1979, diamond drilling yielded:

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 Hole   From   To  True Width   Specific Gravity
(No.)    (m)   (m)      (m)              
  1       20   25      5.20          4.10
  2       20   25      1.40          4.20
  4      N/A   N/A     3.05          3.96
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(Assessment Report 7690)

In 1921, the Brenda mineral claim was located by Globe Mining. During 1923 through 1925, an inclined shaft was completed for a length of approximately 85 of metres and to a vertical depth of 38.1 metres. In 1965, the claims were optioned by Calix. During 1977 through 1979, Mountain Minerals completed a program geological mapping, geochemical sampling and 5 diamond drill holes totalling 174.6 metres. In 1980, a ground magnetometer and gravity survey was completed. In 1991, Mountain Minerals completed 10 diamond drill holes, totalling 65.5 metres.

In 2011, the area was prospected by J.T. Shearer, on the behalf of Homegold Resources.