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Message: cut-off grade economics

cut-off grade economics

posted on Nov 05, 2009 11:22PM

While scanning the Kitco.com site for articles I noticed a press release from a company ( HLM on Agoracom) that just released a NI 43-101 resource estimate for a gold property in Northern Ontario. I checked it out to see what useful information could be found and there was both interesting and and puzzling results. The useful information which I would compare with Kodiak's resource assessment are the cost per tonne numbers used to calculate an economic cut-off grade. Those numbers are $55/tonne mining, $15/tonne processing and $5/tonne G&A ( $CDN) or about $ 75/tonne. Using an average price of $ 900/Au Oz then you get a cut-off grade of about 2.5 g/t, which is the number used by HLM. However , the rest of the news release appears to be a train wreck. This is the second resource assessment carried out on the same showing. The first one was carried out in 2008 with a total indicated and inferred resource of about 54,000 Oz ( not much). Then the updated estimate released today gives new totals of about 65,000 Oz. It's not clear what they were thinking. Instead of drilling a coarse grid along strike and down dip to establish a large area of potential resource( like what Kodiak did) they infill drilled a small area to establish a small gold resource, which wouldn't probably justify a mine and mill. It re-enforces the value of having good management and having a president whose head is anatomically positioned such that he can tell, in fact , if the sun is shining.

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