RE: [ai-geostats] Very narrow Archean Gold Reef distribution

[Dan Bebber]

Title: Message

By "do anything with the data", do you mean geostatistics or other statistics? If geo, how about transforming to a binary indicator, i.e. gold worth bothering with (1), gold not worth bothering with (0)? It sounds like you've got a lot of places with no gold at all. It also sounds like you've got extreme anisotropy.   Dan   Department of Plant Sciences University of Oxford South Parks Road Oxford OX1 3RB UK   -----Original Message----- From: Gayle Hanssen [mailto:[EMAIL PROTECTED] Sent: 09 November 2004 17:11 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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