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Gold/Mining/Energy : Winspear Resources
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To: marcos who wrote (6158)6/22/1998 8:50:00 PM
From: E. Charters  Read Replies (3) of 26850
 
This dyke is not a dyke. It's the vent system of the
fault. A true kimberlite dyke is seldom more than 3
feet in width. That is the largest found to date in
the world. Dykes are narrow, fine grained (not
brecciated or containing large pophyry crystals) and
not too diamondiferous. They usually run 6 inches in
width and persist up to six miles although sometimes
the system will go for hundreds. When you see diatreme
or explosive volcanic facies with accompanying large
porphyry crystals then you know the system has vented
explosively. This is the case here. It is not a
"placidly" emplaced fine-grained dyke. This system here
is properly called a fissure vein. They exist all over
South Africa. They are infrequently mined unless very
high grade, which is not unheard of. The can be very
long, up to 50 miles but their average is under a half
mile. What you do is follow them along strike in the
fault and look for the "blows" or pipes.

WSP is just learning.

EC<:-}
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