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Gold/Mining/Energy : Winspear Resources
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To: wayne cath who wrote (18934)5/2/1999 6:48:00 PM
From: Gord Bolton  Read Replies (1) of 26850
 
Well there is a carat or two of truth in what red says about the larger diameter drill cores.
A two inch drill is great for telling the length of the intersection but they do want to gather cores for sampling as well. The relatively narrow intersections (compared to drilling 100 meters through a pipe) are compensated somewhat by taking a larger core size.
This gives more material for the sample from various sectors of the dyke and the larger the sample sizes the larger the size of the diamonds that are likely to be found within the total sample.
The key factor is that the samples will be more reliable simply because they are larger.
A twelve inch drill core is used to gather mini-bulk samples. That would work fine as well but that would require a heavier drill rig.
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