High-Grade Silicon Assets in British Columbia

Longworth is listed as one of the top silica occurrences in the Province of British Columbia by the BCGS (Simandl, 2014). The land package covers 1,084 contiguous hectares situated four kilometers from the Canadian National railroad mainline and power grid.


Geology & Mineralization
The Longworth claims are hosted by a folded sequence of sedimentary and volcanic rocks which underlie the Bearspaw Ridge. They are all, or in part, Lower Silurian in age and equivalent to the Nonda Formation.

Four northwest trending bands of quartzite have been mapped along the western flank of Bearpaw Ridge. Thicknesses reach up to about 400 meters. The main quartzite band outlines a synformal structure open to the northwest. Rare bedding observed in outcrop dips 70 to 80 degrees east.

The quartzite is very pure, massive and homogeneous. It is composed of extremely well-rounded and well sorted quartz grains, averaging 0.5 millimeters in diameter, which are cemented by silica. The quartzite is pinkish white to buff on fresh surfaces and weathers grey to white. Impurities include muscovite in cavities, limonite on microfractures, minor calcite and possible hydrocarbons.


Historic Exploration
Consolidated Silver Standard Mines Inc. originally sampled and staked the Longworth claims in 1974 while carrying out a regional exploration program. Subsequent exploration focused on the Snow claim and included trenching, blasting and rock chip sampling. Internal reports suggested positive results as a potential feed source for silicon metal smelting (Quartermain 1986).

According to B.C. Ministry of Energy and Mines Open File 1987-15, in reference to the Longworth Property: “At least four northwest trending bands of quartzite have been mapped along the western flank of a ridge. Thicknesses reach up to about 400 metres over a discontinuous strike length of 10km. The main quartzite band outlines a synformal structure open to the northwest. Rare bedding observed in outcrop dips 70 to 80 degrees east. The quartzite is very pure, massive and homogeneous. It is composed of extremely well-rounded and well- sorted quartz grains, averaging 0.5 millimetre in diameter, which are cemented by silica. The quartzite is pinkish white to buff on fresh surfaces and weathers grey to white. Impurities include muscovite in cavities, limonite on microfractures, minor calcite and possible hydrocarbons. Eight chip samples collected in 1982 by the Geological Survey Branch averaged 99.5 per cent silica.

Of the 42 samples collected and analyzed by Silver Standard, 28 met the required chemical specifications with silica dioxide (SiO2) levels ranging between 98.84 and 99.80 percent. Twelve of the 16 samples also boasted acceptable thermal shock resistance results.


Current Exploration
MGX has commenced technical evaluation of the property and completed an N.I. 43-101 compliant technical report with plans to conduct diamond drill program.

Initial exploration will focus on the Snow Claim, where sampling of outcrop has shown consistent high grade (~99%) SiO2 over an area spanning approximately 400 meters in length and width. (Assessment Report 14815).

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