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To: teevee who wrote (11755)	1/12/1999 11:50:00 PM
From: average joe	Read Replies (1) \| Respond to of 26850

teevee can you explain what a coonsheet is, and is it open in all directions. Also, up is a direction, do these coon sheets go up to? aj

To: teevee who wrote (11755)	1/13/1999 12:24:00 AM
From: The Fix	Read Replies (2) \| Respond to of 26850

TeeVee, I read somewhere that at least three pipes come up at a time and they are all within 3000 feet of each other! Is this true? fIXER

To: teevee who wrote (11755)	1/13/1999 12:31:00 PM
From: VAUGHN	Read Replies (1) \| Respond to of 26850

Hello Teevee Most diamondiferous kimberlites have populations of both eclogitic and peridotitic diamonds. The eclogitic tend to be formed at a deeper level and are probably associated with the 300km sourced stones you referred to. They also tend to be the larger stones according to my reading. The depth you suggest intrigues me though. Can you tell me how you arrived at this conclusion as I am not aware of any mantle root that deep under the Slave Craton at least the Lithoprobe data does not suggest that. When you suggest multiple cones based on the variation in the diamond source depth and population, you should also keep in mind that phased emplacement is fairly common and often separated by considerable time spans. Different types of kimberlite with different chemistries and diamond types and populations are often found within the same diatrem. I have heard of I believe, as many as eight distinct emplacement phases. Therefore, while root zones may have multiple sills, they are just as likely to have kimberlite consistency/chemistry variations. That is one of the reasons why only a bulk sample can provide and be considered a true indication of a kimberlite's grade. Be cautious about drawing conclusions from very small sample sizes or very localized sample sites. Regards