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Gold/Mining/Energy : Winspear Resources

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To: Rick the Vet who wrote (17651)	4/6/1999 3:26:00 PM
From: E. Charters	Read Replies (2) of 26850

In South Africa the mines used to take 10,000 ton samples on each level just to see if they would mine that level. Yes, Rick, my fine feathered horse doctor, big samples are routinely done on Kimberlites. It is the only way to know how many rare large diamonds you might have. The name of the game is economics. And the economics are provided by large gems, not small diamonds. The Tli Kwi Cho sampling could have been circumvented as its chemistry showed that it did not have the grade to be a good kimberlite. (Its geothermometry is bi modal in temperature) Unfortunately that is not the whole story. The richest kimberlite of them all is the Premier. It is only 30 carats per 100 tonnes, and it is eclogitic, and poor in pyrope. It is also high in resorptivity, about 40%. Yet it has many large diamonds that are extremely rare in clarity and colour. So for 100,000,000 tons it has outproduced in value every other pipe in history. Its cash count to date is 100 billion dollars. Today's experts in Canada and Australia would take a 1000 ton test of the Premier mine and declare it to be uneconomic. EC<:-}

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