The Ed South (South Ridge) occurrence is located at an elevation of approximately 1220 metres on a north-facing slope in the southeastern headwaters of Lead Creek.
Regionally, the area is underlain by fine clastic sediments of the Ordovician Active Formation, sediments and carbonate rocks of the Middle Cambrian Nelway Formation, undivided sedimentary rocks of the Cambrian Laib Formation and quartz arenite sedimentary rocks of the Neoproterozoic to Lower Cambrian Hamill Group. To the north, these have been intruded by granodioritic rocks of the Cretaceous Anstey pluton and small stocks of syenitic to monzonitic intrusive rocks of the Eocene Coryell Plutonic Suite.
Locally, two criss-crossing trenches expose a dolomite or recrystallized and dolomitized limestone of the Nelway Formation hosting thin, layered sphalerite replacements and disseminations with lesser pyrite. The mineralized zone is up to 3 metres wide and appears to be conformable to stratigraphy. A short distance southeast of the previous zone, a 30- by 5-centimetre lens of galena has been identified in a small northwest-trending shear zone with quartz and calcite.
In 1990, a chip sample (LR-8) from a trench assayed 1.85 per cent zinc over 1 metre, whereas a grab sample (LR-10) of the shear yielded 2.55 per cent lead and 34.2 grams per tonne silver (Assessment Report 20376).
The area has been explored in conjunction with the main Ed (MINFILE 082FSW003) occurrence since 1952, when a rough road to the ‘old prospects’ was developed and a program of bulldozer stripping was undertaken.
In 1990, Worthington Resources prospected and soil sampled the area as the Libby 1 claim. In 1991, Timmax Resources Corp. completed a program of rock, silt and soil sampling; geological mapping and minor trenching. In 1993, Consolidated Ram Rod Gold Corp. completed a 12.8 line-kilometre induced polarization survey on the area.
In 2012, a program of prospecting and geological mapping was completed. In 2019, Guinet Management Inc. completed a program of geological mapping.
