The Britton showing outcrops on Mount Britton, just northwest of the Tulameen River and 11.5 kilometres west-southwest of the town of Tulameen.

The east slope of Mount Britton is underlain by a mylonitic zone, 800 to 1000 metres wide, developed at the contact between the Early Jurassic Tulameen Ultramafic Complex, a zoned Alaskan-type intrusive complex, and Upper Triassic Nicola Group metavolcanics and metasediments. The zone is largely comprised of mylonitic mafic to ultramafic igneous rocks derived from both units.

Mineralization occurs in a zone of brecciation of undetermined width, which has been traced northwest from the bank of the Tulameen River over the east flank of Mount Britton for at least 400 metres. The breccia contains fragments of pyroxenite and altered sediments (layered dunite (?)) with disseminations and stringers of pyrite, chalcopyrite and magnetite up to 1 centimetre thick. In places, the breccia is healed with a calcite-quartz matrix, which is also mineralized.

In 1987, a sample (W708) of a massive pyrite vein, 1 centimetre wide, with minor chalcopyrite, assayed 0.705 per cent copper and 11.8 grams per tonne silver, while a sample (W712) of brecciated ultramafic rock with 5 per cent disseminated pyrite and minor chalcopyrite analysed 0.935 per cent copper and 20.1 grams per tonne silver (Assessment Report 17325\).

Work History

The showing was periodically explored on surface and underground by W. Britton between 1899 and 1913. West Coast Platinum Ltd. completed geological mapping, and soil and rock sampling in 1987. In 2016, Rain City Resources Ltd. completed a program of prospecting and rock sampling on then area as the Northern Champion property.