The CMM property is located on Rudolph Ridge, immediately south of Deadman Pass on the BC–Alberta border.
Regionally, the area is underlain by limestone, slate, siltstone and argillite of the Mississippian Banff and Exshaw formations and dolomitic carbonate rocks of the Mississippian Etherington, Mount Head and Livingstone formations (Rundle Group) and Pennsylvanian to Permian Rocky Mountain Group.
Locally, the Mississippian Carnarvon, Opal and Loomis members of the Mount Head Formation and the Upper Massive member of the Livingstone Formation host potentially large tonnages of high-quality limestone. Rock types include lime grainstone, packstone, wackestone, and mudstone, some of which is dolomitic or chert-bearing or both. The Loomis member is composed of an ooid-rich limestone sequence.
In 2008, 50 samples were collected in locations representing approximately 175 metres of stratigraphy. A section atop the eastern crest of Rudolf Ridge averaged 87.71per cent CaCO3, 6.96 per cent MgCO3 and 4.10 per cent SiO2. Within a bowl-shaped valley on the northern side of Rudolf Ridge, samples averaged 93.37 per cent CaCO3, 4.88 per cent MgCO3 and 0.91 per cent SiO2 (Assessment Report 30711).
The Opal member generally comprises thick massive grainstone with packstone to grainstone and mudstone in upper sections. The lower portion is a resistant, thick, generally high-quality limestone unit of massive, homogeneous, medium to dark, greyish- brown, fossiliferous packstone to grainstone.
In 2008, 37 samples were collected in two locations from the lower section of the Opal member representing approximately 22.5 metres of stratigraphy. The section atop the eastern crest of Rudolf Ridge averaged 90.95 per cent CaCO3, 6.86 per cent MgCO3 and 1.26 per cent SiO2. Within a bowl-shaped valley on the northern side of Rudolf Ridge, the samples averaged 88.77 per cent CaCO3, 9.76 per cent MgCO3 and 0.48 per cent SiO2 (Assessment Report 30711).
The Carnarvon Member consists of well-bedded, dark- grey to greyish- brown lime mudstones and siltstones with shaly, black carbonaceous interbeds.
In 2008, 44 samples were collected from the Carnarvon member atop Rudolf Peak, representing approximately 119.5 metres of stratigraphy. The samples were collected in one section along the top of Rudolf Ridge and averaged 93.70 per cent calcium carbonate, 3.22 per cent calcium carbonate, and 1.64 per cent silicon dioxide (Assessment Report 30711).
Complete descriptions of each member of the Mount Head Formation can be found in Assessment Report 30711.
Work History
In 1994, Ecowaste Industries Ltd. acquired the CMM 1-4 claims, adjoining Summit Lime operations on the British Columbia side of the border. The following year, a program of geological mapping and rock sampling was conducted. Some claims were dropped in 1999, and some were grouped and converted to a cell claim in 2005. Also in 2005, a program of geological mapping was completed.
All of the Ecowaste claims were converted to the property of Graymont in 2007 for consistency of their British Columbia properties. Dahrouge Geological Consulting Ltd., on behalf of Graymont, carried out a geological mapping and rock sampling program at the CMM claims in September 2008. During 2011 through 2024, Graymont Western Canada Inc. conducted further programs of geological mapping and rock sampling on the property.
