The Solo (East Lode) occurrence is located on Grouse Mountain between North and McQuarrie lakes.

Regionally, the area is underlain by a sequence of north west striking andesite flows and pyroclastics, with lesser rhyolite and basalts of the Lower Jurassic Telkwa Formation (Hazelton Group) and a north north-west trending sedimentary sequence comprised of marine black shale, argillite, siltstone and greywacke with intercalated tuffs and breccia of the Upper Jurassic Ashman Formation (Bowser Lake Group). The volcanic and sedimentary rocks are intruded by dikes and small stocks which strike north-northwest and dip west-southwest. These include feldspar porphyry, biotite feldspar porphyry, monzodioritic to gabbroic intrusives and aphanitic basic dikes of the Late Cretaceous Bulkley Plutonic Suite and Eocene Goosly Plutonic Suite. Alteration has affected mainly the feldspar and ferromagnesium minerals producing mica and clay minerals, chlorite, limonite, carbonates, and less commonly epidote.

The main showing consists of a silicified vein, approximately 5 centimeters in width, hosting sphalerite, with minor chalcopyrite and pyrite paralleling the bedding planes of the enclosing andesite country rock.

In 1926, a sample of the mineralized zone assayed 10.2 grams per tonne gold, 75.4 grams per tonne silver, 26.5 per cent zinc and trace lead (Minister of Mines Annual Report 1926, page 38).

In 1984, a sample assayed 1.89 per cent copper over 2.4 metres, while grab samples yielded up to 5.01 per cent copper, 0.14 per cent zinc and 2.1 grams per tonne silver (Assessment Report 14256). Also at this time, drilling yielded two 3.0 metre wide intersection grading 0.43 and 0.29 per cent copper, 0.51 and 5.92 per cent zinc with 7.2 and 28.7 grams per tonne silver, respectively, in hole DDH-18 (Assessment Report 14256).

The area has been explored in conjunction with the nearby Copper Crown (MINFILE 093L 026) occurrence and full regional geology and exploration history can be found there.