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Gold/Mining/Energy : Twin Mining (formerly Twin-Gold) -- Ignore unavailable to you. Want to Upgrade?

To: Letmebe Frank who wrote (349)	3/15/2002 12:49:15 AM
From: Letmebe Frank	Read Replies (1) \| Respond to of 613

Take a look at this portfolio: siliconinvestor.com TWG has a market cap of 35 mill, Majescor 28 mill. What does MAJ have to justify the market cap? What does Twin? Heck, Mountain Province is valued at 51 mill. How long till TWG is worth more than MPV? Will it take punching a lot more holes into FT? The rest of the cherry picked anomolies are blue sky... Results soon on FT....Lakefield is still counting..... (It's late - I'm bored. sorry for the pseudo pump. Goodnight!)

To: Letmebe Frank who wrote (349)	3/16/2002 9:43:24 PM
From: VAUGHN	Respond to of 613

Hello Letmebe Frank I'll try to answer your questions as best I can. Can you or Will talk to me about "Thick Roots"? I am guessing that thick roots are good, maybe because of its implications for kimberlite volume, or finding emplacements within the diamond stability field, but I really don't know why. The term JA used "thick roots" is obviously not scientific and was meant to generally suggest that the crust/mantle beneath BI is deep, cool and generally undisturbed by geologic forces. And Slide 28 said: Somerset Kimberlites: 1- Emplacement ages range from 105 to 88 Ma. 2- Bodies are aligned along a variety of basement and host rock structures - dominantly NW-SE, NE-SW (basement diabase): N-S (basement gneissosity). 3- Xenolith studies have established the base of the lithosphere at 170 km, and a geotherm of 44mW/m2 (Nikos and Batty). 4- Re-Os dating of xenoliths indicates that the sampled lithosphere has Archean dates. 5- Some xenoliths were derived from within the diamond stability window. I'm obviously not a geologist... Whats a Ma. - million years? Nor am I, but yes And Vaughn - Can you tell me what caught your attention on slide 28? Several things: 1- Emplacement ages range from 105 to 88 Ma. Suggests younger pipes therefore less time for erosion to have removed higher grade crater facies and hypabyssal kimberlite if it existed (which it does). 3- Xenolith studies have established the base of the lithosphere at 170 km, and a geotherm of 44mW/m2 (Nikos and Batty). It is generally accepted that the diamond stability field starts at approximately 100km to 150km and can extend down to 600km as proven at Jericho but generally 300km is considered the limit. The geotherm of 44mW/m2 confirms that the peridotitic host rock (lithosphere) was cool enough and under sufficient pressure to host diamonds. 4- Re-Os dating of xenoliths indicates that the sampled lithosphere has Archean dates. The Brodeur Peninsula as you know is approximately 400Ma thick limestone. If this had extended down to the Moho rather than cool archean basement, then the potential for diamonds would have been low. However, the fact that the underlying basement rock was Archean in age and therefore potentially/probably cratonic confirmed that the other prerequisits of Cliffords Rule had been met. 5- Some xenoliths were derived from within the diamond stability window. Simply confirmed the same information as 3 above, all conditions of Cliffords Rule had been met. Hope that helps. I would also pay particular attention to what TeeVee had to say, but for me, the factors that make JI so much more potentially economic than the majority of pipes/deposits found are the following in order of priority. political stability/receptivity/tenure assurance known large pipe sizes known large number of pipes large diamond size economic bulk supply low boart %/high quality % available trained labour no environmental/land claim complications close pipe proximities soft limestone host available fresh water Of course, once grade is established, it will be the most important factor but with what we knew last fall, the aforementioned is what caught my fancy and still does. Regards Vaughn

To: Letmebe Frank who wrote (349)	3/17/2002 10:39:04 AM
From: Letmebe Frank	Read Replies (1) \| Respond to of 613

Wills Comments, from StockWatch: Author: WillP -- Date:2002-03-16 14:22:25 Subject: Root Canal Oh, my. Well, first the easy one. Yes, Ma is million years. Ga is billion years. Think "Ma" for kimberltie eruptions, and "Ga" for diamond formation. OK. So diamonds formed billions of years ago, under just the right circumstances of pressure and temperature. The hotter it gets, the more pressure you need to keep the carbon from becoming graphite, not diamonds. Since the diamonds were formed, until the kimberlite eruptions that carried them to the surface, you needed conditions that were favourable to diamond preservation. New term: A geotherm is a curve that relates temperature as a function of pressure or depth. That rate can vary considerably, depending on just where you are descending into the lithosphere, say under an ocean, as opposed to through a continent. In simple terms, at a certain depth, the pressure will be much greater for a given temperature under a continent than it will be under an ocean. Greater pressures with a given temperature is a good thing. It puts you toward the favourable side of the diamond-graphite curve. Also, the lithosphere tend to be significantly thicker under continents than under oceans. Below the lithosphere, in the asthenosphere, temperatures increase much more rapidly with depth, which is clearly bad. A thicker lithosphere therefore gives you a greater depth that you can get diamonds from, potentially -- assuming that the geotherm prevailing in that area is sufficiently cool to allow you to reach the diamond-graphite stability curve before you run out of lithosphere. Basically, it has been observed that the composition of diamondiferous harzburgites suggests that they were formed at considerably cooler pressures than the surrounding rocks, which suggests that they were formed in a deep, but cool, and therefore solid portion of the mantle. That is the "deep roots". Anyway, even if things are good enough to make diamonds, they have to stay there for Ga, before they were carried to the surface Ma ago. So, there had better not have been any significant variations in the thermal regime over that time. It better not have gotten much warmer, or the diamonds would have been "burned up". Fortunately, the Archaean cratons -- along with their generally thick roots -- also have had a quite stable temperature regime since they were formed. Well, thats part of the story, at least. As for slide 28, I really can't say what caught VAUGHN's eye. What caught mine was the base of the lithosphere, at 170 km, and the 44mW/m2 geotherm. Neither particularly impressed me, although the lithosphere depth seems sufficient, given an average of 160-200 km for cratons, although deeper ones certainly exist. As well, the 44 geotherm seems a bit on the "warm side". Neverhteless, the diamond stability field was probably sampled, although not necessarily to a great extent. That would seem to be supported by the mini-bulk samples. Deeper roots on Baffin, and a colder geotherm would be a good thing. Regards, WillP