ASHTON MINING OF CANADA (ACA) Message Board

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Gold/Mining/Energy : ASHTON MINING OF CANADA (ACA)

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To: ICE who wrote (2740)	10/31/1997 8:27:00 PM
From: Phoenix	Read Replies (2) of 7966

ICE: You make some bold and interesting statements that I'd like to understand a little better. 1. "they are more the shape of a champagne glass that is typical of lamproites". Q. How do you know what shape they are in the vertical? There hasn't been enough drilling to make such a statement. Also it is my understanding that lamproites are generally emplaced in mobile belts where there is evidence of previous plate subuduction and not within Archeon cratons. Since we are in the Buffalo Hills "craton" would this not tend to support the kimberlite interpretation? 2. You "would hope that Ashton has done some petrography and mineral chemistry on the rocks, and that is why they are calling them kimberlites" - What do you think? I suspect they use every technique available to improve their understanding and thereby their chances of succeeding. 2. "crater facies is typically deposited by sedimentary processes" It is my understanding that crater facies is primarily emplaced by the exploded kimberlite falling back into the crater. You can call this a sedimentary process if you like, but would this not be the type of sedimentary process that would result in thick and relatively homogeneous units? Also here are a couple of statements from papers I have read. "Pipes with crater facies preserved are the largest - the giants" and "Grades of crater facies can be significantly higher than the diatreme". 3." The K14 pipes are more comparible to the Fort La Corne (FLC) kimberlites in Sask." I seem to recall a statement in one of Kaiser's newsletters (and please correct me if I'm wrong) that the FLC "pipes" were reworked crater facies in a "pancake shape". The roots have never been found. But K14 has been drilled to 200 metres and not hit bottom. Sounds like a true pipe to me. Also I'm not sure if the low grade of the FLC pipes is caused by the reworking ot the crater facies material or that it was just low grade to begin with. 3. You mention something of "encourageing fine diamond results prior to bulk sampling" from the DHK pipes in the Slave Province, that later proved unecomomic. I'm not familiar with this story, but I'd like to hear more. What were the typical micro/macro counts? Were they clear? Were they fragmented? 4. "Buffalo Hills is missing the good mineral chemistry" - please elaborate. 5. "and does not have the geological setting of the Slave" - please elaborate and explain. Are you talking about the geological setting of the souce rocks or the pipes in their present position? And is it a superior or inferior setting? Please don't interpret my comments here as some kind of personal attack. That has already happened once on this thread. I am not an expert on diamonds or kimberlites or lamproite, but I'm trying to learn more. The more I understand the better is my ability to evalualte the risk/reward ratio. But I do like to see significant statements such as yours explained, qualified and quantified where possible. Respectfully. P.

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