The Lois Creek Lower adit is located at the headwaters of Lois Creek at an elevation of 880 metres.

The area lies within the Jurassic-Cretaceous Coast Plutonic Complex near its western boundary with the Insular Belt. The complex consists of diorites and granodiorites enclosing a series of northwest- trending pendants. In the Mount Diadem area, feldspar-rich diorite and quartz diorite dominate. These pendants, occurring along Howe Sound and Jervis Inlet, are interpreted to be part of the Lower to Middle Jurassic Bowen Island Group, coeval with volcanic rock of the Bonanza Group and the Harrison Lake Formation.

Mount Diadem forms part of a ridge consisting of Bowen Island Group sediments and volcanics that form a 15- kilometre long by 1 to 2 kilometre wide roof pendant. Lithologies along the eastern portion of the pendant consist of dark- green, chlorite-rich, massive volcanic flows and tuffs intercalated with grey to black cherty tuff and foliated, pyritic argillaceous siltstone. The western portion of the pendant contains well-bedded clastic sediments and minor carbonate, with intercalations of intermediate to mafic tuffs, flows, and sills. In total, six stratigraphic units have been defined and are, in ascending order: (1) tuffaceous sandstone with minor argillite and lapilli tuff; (2) chlorite-rich tuff with interbedded tuffaceous sandstone and minor argillite; (3) thin-bedded argillite with minor carbonate and lapilli tuff interbeds; (4) banded argillite, sandstone, chert, and minor lapilli tuff; (5) siliceous argillite, siltstone, tuff, and chert; and (6) andesitic breccia.

Volcanics and sediments have a near-vertical bedding and cleavage that form a series of tight upright folds that plunge moderately to the north.

Mineralization consists of pods and lenses of massive sphalerite, chalcopyrite, pyrrhotite and minor galena and arsenopyrite developed within steeply dipping shears, which trend 330 to 005 degrees and 060 to 100 degrees. Shearing is believed to be continuous between the upper (north) and lower (south) adit area, a distance of greater than 700 metres. The shearing is also believed to cut graphitic argillites, chlorite-rich tuffs and andesite flows and/or sills. Overall, the massive shear-controlled mineralized pods appear to be spatially related to the argillite-chlorite tuff contact although some mineralization occurs within both of these units.

From a 2.5 metre wide area in the adit, 5 chip samples assayed an average of 0.21 per cent copper, 0.39 per cent lead, 9.46 per cent zinc, 86.1 grams per tonne silver and 1.37 grams per tonne gold (Assessment Report 11641).

In 1998, two samples from the Lower adit yielded 2.42 and 2.20 per cent lead, 32.6 and 29.5 per cent zinc, 48 and 49 grams per tonne silver with 0.88 and 0.21 gram per tonne gold over 0.6 and 1.1 metre, respectively (Assessment Report 25570).

In 2001, samples from the Lower adit assayed up to 0.97 per cent copper, 0.22 per cent lead, 7.38 per cent zinc and 166.4 grams per tonne silver over 0.5 metre (Sample 304054; Assessment Report 26631).

In 2005, a rock chip sample (05-ROX-1) taken from an outcrop located 95 metres southeast of the Lower adit assayed 1.24 per cent lead, 28.1 per cent zinc and 47.9 grams per tonne silver over 0.3 metre (Assessment Report 27861).

Work History

The Mount Diadem area has received intermittent exploration since the 1920s. In 1927, Brittan R. Mining Co. drove two small adits 1.5 kilometres northwest and 2.0 kilometres north-northwest of Mount Diadem, respectively.

During 1947 through 1950, Inco Canada Ltd. and Bralorne Mines excavated several open cuts and a short adit in the area of the headwaters of No Man's Creek. In 1954, Copper Ridge Silver Zinc Mines Ltd. held 19 claims in the area. In 1965, Vanco Explorations Ltd. held 17 claims northwest of Mount Diadem, called the Linda group. Citation Explorations Ltd. held 73 claims and optioned the Linda group in 1967.

Tiger Silver Mines optioned the Linda group in 1970, and carried out geochemical and geophysical surveys. In 1971, Brittan R. Syndicate optioned the 23 claims and performed geophysical and geochemical surveys. The claims lapsed and were restaked by Fury Explorations Ltd. (Diadem claim) and R. Schmidt (Fox claim). In 1982, Anaconda Canada Explorations Ltd. performed a regional stream sediment survey in the Mount Diadem area. In the following year, an exploration program was carried out on the optioned Diadem and Fury, and other staked claims surrounding Mount Diadem.

White Channel Resources Inc. staked the Rox 1 to 5 claims and conducted property exploration in 1991 and 1992. In 1994, Noranda Exploration Company Limited optioned and explored the Rox claims which included the Lois Creek Trench showing for volcanogenic massive sulphide-type mineralization. In 1995 and 1996, Navarre Resources completed programs of rock and soil sampling, geological mapping and eight diamond drill holes, totalling 547.7 metres. Stirrup Creek Gold Ltd. optioned the property in 1998 and completed a program of geological mapping and ground electromagnetic and magnetic surveys on the area.

During 2001 through 2005, Fundamental Resources completed programs of rock and soil sampling, geological mapping and 3.0 line-kilometres of ground electromagnetic and magnetic surveys on the area. In 2009, Sunshine Global Mining purchased the Rox claims and completed a minor program of sampling.

In 2013, Fundamental Resources completed a program of rock sampling and geological mapping. In 2015, Asia New Energy Corporation completed 112.0 line-kilometres of combined airborne magnetic and radiometric surveys on the area. During 2017 through 2019, Asia New Energy Corp. conducted minor programs of geological mapping and geochemical (rock and soil) sampling and a 3.9 line-kilometre ground magnetic survey on the as the Rox property.

In 2023, Kenorland Minerals North America Ltd. completed a 512.0 line-kilometre airborne electromagnetic survey on the Rox property.