To: Tomato who wrote (1113 ) 8/3/1998 2:02:00 PM From: alex bertolini Respond to of 2577
Tomato: I compliment you on your good analysis of both WSP and MPV. I agree if Gabriela can't handle another company having the goods like MPV she should just shut her mouth. As this forum is for individuals to exchange information between each other not to for defamation! I got this analysis comparing fissures and pipes from Southernera's homepage: Notes on Kimberlite Fissures versus Pipes 1. Kimberlite fissures are vein-like intrusions which fill cracks in the earth's crust. These are generally less than 1 metre wide but can run for many kilometres and extend to great depths of at least 1,000 metres. 2. Pipes are carrot-shaped intrusions of kimberlite averaging a few hundred metres in diameter which extend to mineable depths of less than 1,000 metres. 3. UNLIKE pipes, fissures generally maintain consistent width and grade to great depths. 4. A 15 kilometre long fissure, 1 metre wide and extending to 1,000 metres, generates 40.5 million tonnes of kimberlite. 5. A fissure 10 kilometres long, by 0.8 metres wide, extending to a depth of 500 metres, generates about the same tonnage as a 2 hectare (5 acre) pipe. This is half as large in tonnage as the Kimberley mine in South Africa which produced 22 million carats of diamonds over its 50 year life. 6. Considerable extra tonnage may be added to the ore reserves in fissures by pipe-like enlargements or "blows" which occasionally occur along strike. 7. Fissures generally occur as complex multiple semi-parallel dykes forming a fissure system. The average total strike length in a single system is approximately 15 kilometres (9.4 miles). 8. Most of the fissure systems in South Africa have been mined continuously for 50-60 years and are still in production, mining at depths of 400 to over 700 metres with substantial reserves still in place. 9. There are at least 9 fissure/blow/pipe systems in South Africa which have supported long term economic mining of diamonds. These are: Bellsbank, Bobbejaan, Ardo and Newlands northwest of Kimberley, Roberts Victor, Loxtondal, Rex, Star and Koffiefontein in the Orange Free State and Helam in the Transvaal. In Venezuela and Sierra Leone, very substantial numbers (25 and 54 million carats respectively) of high value diamonds have been mined in alluvial/eluvial deposits derived from fissure systems. The area mined in Venezuela is 25 by 5 kilometres, while much of the Sierra Leone production probably comes from a fissure system totalling 15 kilometres of strike. 10. Capital costs are very low relative to NWT. This is estimated to be U.S. $25 - 40 million in South Africa versus U.S. $300 - 500 million in the Northwest Territories. 11. Fissures often have a strong eclogitic component, hence some abnormally large diamonds may be found (e.g. the 969 carat "Star of Sierra Leone"). 12. Tonnages mined are in the range of 100,000 to 500,000 tonnes per year. In the case of SUF-1, because of easy potential multiple ore access by adits, both lower mining costs (< U.S. $25 per tonne) and larger plant throughputs may be possible. WSP can mine dykes at a profit!!! Guess I should of done my research before critizing!! Alex