The Rainbow area is underlain by Lower Jurassic Telkwa Formation (Hazelton Group) volcanics comprised of red, purple, green to grey andesitic to rhyolitic flows, tuffs and breccia with minor intercalated sediments. The volcanics are intruded by a Late Cretaceous quartz-feldspar porphyry stock and associated felsite dikes of the Bulkley Plutonic Suite.

A fracture zone with quartz infilling in a shattered, porphy- ritic volcanic rock hosts mineralization up to 6 metres in width. Mineralization consists of chalcopyrite, bornite, and specularite which occur as irregular lenses. Approximately 5.4 tonnes of ore taken from a 3 metre shaft along this vein in 1914, assayed 2.0 grams per tonne gold, 171.4 grams per tonne silver and 2.9 per cent copper (Minister of Mines Annual Report 1914, page 219).

Combined production from the King (093L 041) and Rainbow claims (listed under Hunter Basin) for the period 1915 to 1941 totalled 269 tonnes of sorted ore which produced 8160 grams gold, 283,366 grams silver and 42,710 kilograms copper.

WORK HISTORY

Refer to King (093L 041) and National Mineral Inventory Card 093L11 Cu4 for details of the Rainbow early Work History.

In 2007, Lions Gate Energy Corp conducted an Aerotem airborne geophysical survey on parts of the El Toro property which also covered the Hunter Basin area that included Idaho (093L 040), King (093L 041), Hunter (093L 042), Colorado (093L 043), Rainbow (093L 044), Tribune (093L 255) and Hannah (093L 080)(Assessment Report 29456).

The 2008 El Toro program of Lions Gate Energy Inc conducted 1495 line kilometre airborne magnetic and electromagnetic geophysical survey covered the Hunter Basin area that included Idaho (093L 040), King (093L 041), Hunter (093L 042), Colorado (093L 043), Rainbow (093L 044), Tribune (093L 255) and Hannah (093L 080).

In 2008, Lions Gate Energy found that the Colorado adit was caved but sampled the dump that yielded 24.0 per cent copper, 0.75 gram per tonne gold and 1589 grams per tonne silver from sulphide mineralization (sample 14556) (Assessment Report 30731).

In 2009, the Rainbow showing was located and a sample yielded 5.25 per cent copper, 0.68 gram per tonne gold and 206 grams per tonne silver (sample 13501) obtained from the dump of a small caved adit (Assessment Report 31515).

Refer also to King (093L 041) for general information on the El Toro property, a large property that was worked from 2007 to 2015) and contained the Hunter basin area.