The South 4 Mile Creek occurrence is exposed in the stream bed of 4 Mile Creek.

The area is underlain by mafic to felsic volcanic and sedimentary rocks of the Lower Jurassic Bonanza Group and limestone of the Upper Triassic Quatsino Formation (Vancouver Group). These are intruded by granodiorite of the Early to Middle Jurassic Island Plutonic Suite and quartz feldspar porphyry dikes.

Locally, semi-massive sulphides, sulphidic felsic to intermediate volcanics and sulphidic breccia veins containing 2 to 25 per cent sulphides and exposed over widths of 0.1 to 0.2 metre.

The South 4 Mile Creek showing was discovered in 2004 by Inspiration Mining Corp. while completing a program of soil and stream sediment surveys and rock sampling on the Jasper property. The Jasper property consists of a number of MINFILE occurrences known from north to south as the Jasper 1 (092C 080), Tam 16 (092C 081) and Pan (Easy; 092C 088). Select outcrop grab samples assayed up to 1.770 per cent copper, 4.0 grams per tonne silver and 0.03 gram per tonne gold over 0.1 metre (Assessment Report 27657).

In 2007, a four-sample geochronology sampling and analysis program was completed, suggesting a possible Jurassic age for the sulphide mineralization. In 2008, Inspiration Mining Corp. completed a program of airborne electromagnetic and magnetic geophysical surveys, totalling 817.9 line kilometres. In 2010 and 2011, Nitinat Mineral Corp. completed programs of geochemical sampling, prospecting, geological mapping and trenching on the Jasper property.