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To: Rocket Red who wrote (17344)4/1/1999 9:00:00 PM
From: LaFayette555  Read Replies (1) | Respond to of 26850
 
So is that what happend today.. Doc BB came out with a recom ??



To: Rocket Red who wrote (17344)4/1/1999 10:30:00 PM
From: Gord Bolton  Read Replies (2) | Respond to of 26850
 
Hey there red, I just read and reread the notes from the meeting with Dr. Bob and was kind of intrigued with the note that the Snap Lake area is 300 meters higher than the surrounding area, if I have that right.
Others have commented on the fact that Snap Lake has no river flowing in and no river flowing out. I did not know that Snap Lake was that much higher than surrounding country.
That does indeed sound like a small volcanic mountain with a crater lake. I would love to see some maps with the relative elavations for the area.
I think it would be very interesting to sink a deep drill hole down a few thousand feet just to see what is there. Maybe Dr. Bob thinks that the Monster under Snap Lake is much much bigger than any of us suspect.
Erosion in the NWT by rivers would be miniscule compared to the erosion by glacier action which might be expected to be more severe over a high point.
It is interesting that there is a major fault running through the area.
This might be pretty much of a long shot but the weight of the glaciers that originated and passed over that area is almost beyond comprehension. It was enough to actually bend and depress the earths crust significantly.
For example in my home Province, Saskatchewan, the weight of the last glacier significantly depressed the crust and it took a long time after the glacier was gone to "rebound".
The water that now flows east from North Battleford and Saskatoon through the Saskatchewan Rivers used to flow south through the Quapelle Valley. Long after the glacier had retreated the land rebounded and changed the direction of the water flow.
The fact that numerous glaciers have passed over the Snap Lake area without shearing off the elevation difference entirely could mean that when confronted with a lot of weight the area actually bends and sinks. The fault might permit this to happen. This would also mean that the upward pressure around the fault and the weight from the glaciers forming and passing have been fighting it out there for many millions of years.
The weight of the glacier passing over and depressing the land would tend to spread the fault at depth creating openings that would be charged by high pressure magma from below the mantle. A five mile barrier of ice might create a significant barrier that would prevent an eruption to surface of the crust from actually "blowing" to the atmosphere. This might create the "gentle emplacement" environment which would be favourable for diamond preservation.
Fascinating stuff. I think I will have to go find some Dr. Bob books to read.