Re: 5,906 Soil samples over the 328Km of claims
in response to
by
posted on
Mar 23, 2011 12:29PM
Black Horse deposit has an Inferred Resource Now 85.9 Million Tonnes @ 34.5%
I think there is a little gem in the news release that is easily overlooked.
"KWG has made arrangements to donate the 5,906 samples collected to the Ontario Geological Survey with whom it is presently consulting on the protocols for a heavy minerals analysis of the glacial till section encountered at the bottom of most of the boreholes."
I take this to read that we could be getting free analysis of all the Golder soil samples taken the entire route of the proposed railway. I'm not familiar with analysis of till samples but Actlabs seems to have a proven process.
From Actlabs website: Heavy minerals can be concentrated from glacial till samples or from stream sediments. The theory behind the use of heavy mineral concentrates relies on the fact that by concentrating the heavy mineral fraction from the sample, the dilutant light minerals which may obscure an anomaly derived from a deposit are eliminated, providing a clearer picture. This allows the minerals to be examined under a binocular microscope, SEM or electron microprobe for particle shape or composition. Particle shape of gold grains will commonly identify distance to source. Very abraded grains may have travelled a good distance whereas delicate grains are probably more local. Similarly for diamond exploration, the presence of certain mineral phases may indicate distance to source kimberlites. Bulk analysis of heavy minerals provides a rapid, low cost method to screen large volumes of samples. Samples with appropriate chemistry can then be further evaluated as the INAA technique is non-destructive.
Heavy mineral concentrates are usually prepared by tabling or wet sieving a very large sample of till or stream sediments (up to 20 kg may be routine). The heavy mineral concentrate collected at this stage is then further processed with heavy liquids using methylene iodide (SG = 3.3). The resultant concentrate then is separated into magnetic and non-magnetic fractions and it is the non-magnetic fraction which is usually analyzed. In some cases more elaborate separations include separating paramagnetic fractions and sieving to various particle sizes before analysis. This may provide further insight into identifying the source of the heavy minerals. Both gold and diamond mines have been discovered using this technology.