The Ace occurrence is along upper Lemieux Creek, a little more than 100 metres downstream from the outlet of Taweel Lake.

The Ace showing is hosted by metasedimentary rocks of the Nicola Group. The mineralization at the old shaft along Lemieux Creek consists of lenses of massive pyrrhotite-pyrite-arsenopyrite with minor chalcopyrite. Individual sulphide lenses are up to several tens of centimetres wide, and are hosted in dark- grey phyllite containing contorted layers and fragments of lighter grey siltstone and fine- grained quartzose metasandstone. Mineralization in the trench area is likewise hosted by sedimentary rocks, and consists of iron-rich sphalerite, galena, chalcopyrite and pyrite. Both zones are reported to have a "significant gold content" (Assessment Report 25939).

The mineralization was briefly mentioned in the Minister of Mines Annual Report 1924, which reported that a sample submitted by a local prospector assayed 1.371 grams per tonne gold, 70 grams per tonne silver, 0.2 per cent copper and 20 per cent lead.

In 1998, diamond drilling (DDH 1) intercepted 1.8 metres averaging 5.06 grams per tonne gold and 16.4 grams per tonne silver, while a grab sample (600 S) from the shaft area assayed 27.4 grams per tonne gold, 13.0 grams per tonne silver, 0.091 per cent copper and 0.017 per cent cobalt (Assessment Report 18219).

In 2010, a rock sample (No.6) from the Ace shaft assayed 17.8 grams per tonne silver and 0.338 per cent zinc (Assessment Report 31639).

In the early to mid- 1900s, work included the sinking of a shallow shaft on the southwest bank of Lemieux Creek, some trenching and some diamond drilling. Peppa Resources drilled three short diamond- drill holes during 1988. Forefront Ventures conducted rock sampling and reconnaissance work in 1994, and grid work and a magnetometer survey were conducted in 1996. Further grid work and a ground magnetic survey in November 1997, followed by geological mapping in September 1999, were conducted by Canadian Zeolite Limited. The B.C. Geological Survey conducted a regional till geochemistry program on NTS mapsheets 092P09W and 08W in 1999 (Open File 2000-17). In 2002, Zeo-Tech Enviro completed a soil sampling program. During 2005 through 2013, the area was explored in conjunction with the nearby Anticlimax A, B and C (MINFILE 092P 014, 092P 015 and 092P 016, respectively) occurrences as the Crazy Fox property.