SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Gold/Mining/Energy : Winspear Resources
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: Eric Rojas who wrote (85)1/25/1997 12:17:00 AM
From: bill   of 26850
 
Eric, thanks for your reply. A question. It would seem obvious that
a critical question is the relationship of the boulders to their
source. If they're sitting on top of the kimberlite pipe it would
be great. However,

i. given that there is quite a lot of overburden
ii. that kimberlite is softer than the host rock, erodes more
quickly from prehistoric glacial action plus weathering and these
boulders were found on the ground not in a lake
iii. that we find boulders from the NWT all the way into Manitoba;
boulders that were dragged there and deposited when the
glaciers melted

on what basis does WSP believe that the boulders are not far
from their source?

I understand the concept of the indicator minerals. Or, I think I
do. Kimberlite pipe. Lakes are shallow.Ice forms. Moves repeatedly
in a particular direction. That's what causes the fans of indicator
minerals.

Is the assumption that these boulders have been moved by ice in
the geologic recent past rather than by glacial action?

Someone mentioned, but I don't remember who, that the distance
the diamonds themselves plus the indicator minerals have moved
can be estimated by the wear shown. Much the same principle as
stone falls off a cliff and gets transported down a river. The
further it goes, the smoother it becomes because of the
abrasian. I hadn't heard that before.

I understand the importance of WSP having identified a circular
anomoly. That's a strong case for kimberlite embedded in host
rock. The conclusion one wants to draw from that is that it must
be the source for the boulders. Is there anything so far other
than proximity for making the connection. For example, are the
boulders and the material in the anomoly the same material? Or
do they know.

A lot of questions, I'm afraid. Thanks in advance.I'm reading as
much as I can but I don't have a background in geology.
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2026 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News