Hi- Without knowledge of the geometry of the veins the suggestion may be pretty silly, but if the veins occur in swarms which are combined for mining I would suggest diluting to full mineable thickness (if the veins are intersected at odd angles this may be fairly tricky) and then looking at mineable grade thickness and mineable thickness.
Regards Robert (Bob) L. Sandefur PE Senior Geostatistician / Reserve Analyst CAM 200 Union Suite G-13 Lakewood, Co 80228 [EMAIL PROTECTED] 303 472-3240 (cell) <-best choice 303 716-1617 ext 14 ________________________________ From: Gayle Hanssen [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 09, 2004 10:11 To: [EMAIL PROTECTED] Subject: [ai-geostats] Very narrow Archean Gold Reef distribution Dear All I am involved in trying to find a solution for a gold mine in Zimbabwe. The veins are very thin (from 5cm to 4m) with grades from trace to 2.2% Au. We are able to physically model the veins (a series of them). However, I am informed that the grade distribution is a "J-type" distribution and needs to be "normalised" before we can do anything with the data. A log-normal distribution does not work and it is still hugely skewed. Any suggestions on solutions or software applications that can solve this problem? Regards Gayle Gayle Hanssen Digital Mining Services P O Box HG528, Highlands Harare, Zimbabwe Ph +263 4 730 534 Cell +263 11 601 973 e-mail [EMAIL PROTECTED]
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