The Gravel Creek (No.7) occurrence is located north of the highway crossing Gravel Creek, approximately 7.5 kilometres west of Horsefly.
The area is underlain by Lower and Upper Triassic Nicola Group basalts and volcaniclastics. Younger Miocene flood basalts overlie the Jurassic volcanics. Tertiary silica conglomerate outcrops are found on ridges to the west of China Cabin Lake.
Locally, an adit exposes a shear zone striking north 40 degrees west and dips 40 degrees to the south west. Mineralization consists of chalcopyrite, malachite and azurite hosted by a deeply weathered conglomerate and augite andesite tuff.
A second area of mineralization, exposed nearby in the creek canyon, consists of a chlorite-carbonate altered basalt hosting banded chalcedonic quartz-carbonate-chalcopyrite veins, up to 10 centimetres thick, with inclusions of bornite and replaced by chalcocite, plus minor covellite-digenite. In 1996, select grab samples taken from the veins are reported to have assayed up to 20 per cent copper, 645 grams per tonne silver and 5.0 per cent mercury (Assessment Report 25057). In 1999, grab samples assayed up to 9.584 per cent copper and 380.5 grams per tonne silver (sample BT-6R), while samples taken from a poorly exposed zone on the east side of the creek assayed up to 1.0 per cent copper and 58 grams per tonne silver (Assessment Report 26218).
In addition, native copper occurring in vesicles and as disseminations is reported from drilling. In 1984, a sample of drill core assayed 0.06 per cent copper over 1.5 metres (Assessment Report 12581).
In 1967, a program of regional prospecting and sampling was completed by the Keweenaw Sydnicate. During 1982 through 1984, the area was prospected as the Gold claims and two diamond drill holes, totalling 158.5 metres, were completed. During 1996 and 1997, White Channel Resources completed programs geological mapping, prospecting and one diamond drill hole, totalling 367.9 metres, on the area as the Mineral Ridge property. In 2000, the area was prospected and mapped as the Dot Com property. During 2008 through 2012, programs of test pitting, trenching and geochemical sampling were completed on the area as part of the Rimfire project.
