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Gold/Mining/Energy : Winspear Resources -- Ignore unavailable to you. Want to Upgrade?

To: Gord Bolton who wrote (13117)	1/22/1999 11:07:00 AM
From: LaFayette555	Read Replies (1) \| Respond to of 26850

imagine a wall of ice 1000 meters thick slowly advancing.. the lake is like some piss on the ground compared to that.. in fact the glaciers themself gouged the lake there anyways

To: Gord Bolton who wrote (13117)	1/22/1999 11:14:00 AM
From: Chad Barrett	Respond to of 26850

<< This may seem kind of silly, but if the pipe is not exposed, and the lake is in a depression, and whatever eroded diamonds there might be would be in the bottom of the lake, How would the wind or a glacier for that matter have blown away any significant proportion of the pipe? >> I'll preface this by saying that I am not a geologist (although I doubt anybody here is... except Walt?) Regarding glacial movements and lakes.... most lakes in the NWT and all over Canada were caused by glacial movements during the last ice age. Even in South Western Ontario many of the land features you see were caused during the last ice age (drumlins, etc. can be seen as you travel along the 401... although you probably wouldn't be able to recognize them while driving in a car... a view from above would make them more recognizable) I believe that in the NWT one of the observations that was made that led to the discovery of some of the first diamond pipes was that some of the lakes may have been caused because of a kimberlite pipe. From what I have read, I believe kimberlite pipes tend to form in such a way that they sag in the middle, and hence would make a natural depression that would become a lake when filled with water. Glacial movements in this case would likely just be responsible for eroding away overburden and exposing the kimberlite pipes at (or near) the surface? If the glacial movements actually wore away the top of the pipe, that would result in indicator minerals, etc. being scattered all around the pipe. By looking at the geological characteristics of the land in that area, you can determine the direction of the last glacial advance and retreat, and therefore you can begin to trace back to the source of the indicator minerals... hopefully a kimberlite pipe... (or in this case, a very diamondiferous dyke) Chad

To: Gord Bolton who wrote (13117)	1/22/1999 11:23:00 AM
From: Chad Barrett	Read Replies (1) \| Respond to of 26850

<< How would the wind or a glacier for that matter have blown away any significant proportion of the pipe? >> Gord, more specifically to explain how a glacier could have blown away a significant portion of a pipe... when the glacier moved over the pipe, it picked up much of the material on the way by. It would then carry that material with it as it crept along. Once the glacier begins its retreat, it would once again be dropping some of the material on the way back as it melts. This leads to the material that was eroded from the pipe being scattered around the pipe. Much of the material will tend to stay in the general vicinity of the pipe in most cases though. That's just my take on it though... ? Chad