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 : Nuinsco Resources (NWI) -- Ignore unavailable to you. Want to Upgrade?


To: Tom Cat who wrote (1191)3/4/1999 2:50:00 PM
From: overbyte  Read Replies (1) | Respond to of 5821
 
It's time for THE BIG SHOW!

over

PS, I'm here to prove that brains ain't everythung.



To: Tom Cat who wrote (1191)3/4/1999 3:48:00 PM
From: 1king  Read Replies (2) | Respond to of 5821
 
You should see what EC can do with a cigar<G>

I know childish!

"Is it possible that the mag picked just the low grade and the intersected high grade, offset to about 50 mts south, was not detected because it is beyond the detection range? (E.g. too deep), or are you suggesting that NWI did not apply properly the mag analysis ?"

There are several possibilities:
1) The sulfides are not, or only very weakly, magnetic
2) Moderately magnetic but lost in higher background magnetism (e.g. magnetite in the gneiss etc.)
3) They are magnetic but the size is too small versus the depth.

Why I meant by the anomaly comment is that all we know is a grey zone sketched on a map or a black line. I have no idea what that could mean, numerically?

IMO from the sketches it appears that the anomalies (Mag and IP) are related to basal mineralization in the local gabbro(?) body. Therefore this stuff is probably weakly magnetic and behaves as a narrow (<20m) dipping "sheet".

That being the case you could describe the mineralization as a phone-book shaped body dipping ~30-40 degrees. In geophysical terms the leading edge (exposed edge?) or up-dip edge will be most easily detected.

It is noteworthy, that as different more deep penetrating methods, such as TEM are employed the anomalies tend to migrate down-dip as we can see deeper parts of the anomalous body. This is the case here where the TEM sees deeper than the IP and therefore the anomaly was located down-dip or along the lines to the southwest (~west I believe??).

FWIW, hope the analogy worked?

1King

~~~~~~~~~~~~SW~~~~~~~TEM~~~~IP~~~~~~~~~~NE
--------------------------------|--------|-------------------
---------------------------------------------------ground surface
-------------------------------------------***-------------
IP depth penetration say 100m--------->***--------------
---------------------------------------***----------------
------------------------------------***-------------------
TEM depth penetration ~200m->***--------------------
-------------------------------***---------------------
----------------------------***-------------------------
--------------------------***------------------------
----------------dipping mineralization (***)--------

Man that was tough to do!!!!!!!

Good for a laugh at least;-)

EDIT The variability of the quality of mineralization also has a lot to do with the degree of migration!! Like NWI had better sulfides down dip hence the position of the TEM anomaly.