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Gold/Mining/Energy : Winspear Resources
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To: Gord Bolton who wrote (13160)1/22/1999 3:52:00 PM
From: Walt  Read Replies (2) of 26850
 
You standark Kimberlite Pipe model is something like a carrot it starts of small at the bottom and as it comes to surface it widens out. The theory of why they are this shape is gas coming up from the mantle expands as the pressure releases. Something akin to releasing an air bubble at the bottom of the ocean as it rises it grows in size.
Alot of pipes down at the root zone have dykes and sills around them.
A blind pipe never makes it to surface for one reason or another. Imagine a pipe starting to come up and then it hits a pre existing area of weakness, maybe an existing fracture in the earths crust so it and the kimberlite follow this new path of least risistance. Thus the dyke may lead back to the pipe which feed it. The kimberlite material in the snap dyke had to come from somewhere so it has a feeder and that feeder could easily be a blind pipe.
What size the pipe or feeder is or could be is anyones case. Drilling will tell.
As for the other train and drill targets Cl25etc I believe they hit pipes which weren't very diamondiferous but they believe there may be other as yet undiscovered pipes along the train because the indicators indicated better pipes they they so far found. If you have a train which starts at one pipe then passes over others, the indicators from the various pipes get all mixed up and you can have a devil of a time finding the good pipe. I believe it is aber who found a great indicator train but have never been able to find the pipe it originated from. In exploration luck often plays as important a role as skill and sometimes it can baffle people for years.
Pipes usually occure in clusters and that is what makes the hilltop property so interesting, they have a number of targets there to test and the indicators are reported to look good.
If WSP did find a pipe with the grade of the dyke, that would be very interesting.
regards Walt
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