The Avon Fraction (London Creek, London Canyon) occurrence is located on London Creek, a south flowing tributary of the Indian River, at an elevation of approximately 600 metres.

The area is underlain by an elongate, northeast trending, stock of phyllic-propylitic altered porphyritic quartz diorite, which intrudes a sequence of rhyolite and dacitic to andesitic pyroclastics. The volcanic rocks are part of the Lower Cretaceous Gambier Group and occur at the south end of a roof pendant. The pendant is enclosed in Late Jurassic diorite and quartz diorite of the Jurassic to Tertiary Coast Plutonic Complex. The stock is exposed over a 900 by 400 metre area.

Locally, a propylitic altered quartz diorite hosts fracture controlled sphalerite, chalcopyrite, bornite and trace galena mineralization. The quartz diorite also hosts pervasive, up to 30 per cent, disseminated pyrite.

In 1975, two samples (IRA 8 and 9) of siliceous pyritic rocks from the London Creek canyon assayed 0.23 and 0.05 per cent copper with 4.65 and 7.93 grams per tonne gold, respectively (Property File, Paul A. Lindberg [1975-09-29]: Geological Mapping and Economic Appraisal of the Indian River Section of the Britannia Claims).

In 1980, 37 samples collected from an area approximately 100 by 50 metres in size yielded an average of 0.18 per cent zinc, including 1.35 per cent zinc over 5 metres (Assessment Report 36023).

In 1984, a grab sample (13846) of altered quartz diorite with pyrite, chalcopyrite and sphalerite assayed 8.8 grams per tonne silver, 0.440 per cent copper, 0.245 per cent zinc (Property File, Tom Heah [1984-12-01]: Geology and Geochemistry of the London Group Indian River, B. C. Rept. #144-016-84).

The area has been explored since the early 1900’s and later on by Britannia Mining and Smelting. In 1962, Anaconda acquired the claims. The area was drilled by Anaconda in 1965, 1980 and 1981. In 1984, Falconbridge Copper entered into an option agreement with Anaconda Canada and conducted programs of geological mapping and sampling on the area. In 2015, NEK Canada Mining Group completed a program of rock sampling and geological mapping on the area.