OR Blythefan the veined chalcocite- bornite may be at the...

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19/10/17

15:20

Post #: 28035576
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Originally posted by Blythefan ↑

The IP will give AUR a better idea of where the most sulphidic stratigraphy lies. In folded and thrust-faulted terrain like this it is probably a good idea.

The DHEM (different geophysical method) relies on conductors and an EM response. This is good at detecting highly conductive massive sulphides. However, the chalcocite-bornite mineralisation may not provide good conductors as it is in veins, which may not be continuous over many metres like a sheet of massive sulphide. Also, bornite and chalcocite are twice to three times the copper tenor of chalcopyrite; to get 1% Cu you need half to a third as much sulphide as chalcopyrite. Also, in the few images from Wodger, chalcocite is not visually associated with pyrite.

So these are low sulphur systems, and it's unkown at this stage whether DHEM will find them (again, questioning SFR's strategy if this mineralisation style is in the eastern Bryah).

But induced polarisation works well on disseminated sulphide systems, although again, low-sulphide chalcocite-bornite veins might not respond well (but more likely).

The implications of this armchair interp would say that, hey it's nice to drill 60,000m of AC a quarter and do high powered DHEM looking for stratabound VHMS but it may not be as effective at finding chalcocite-bornite systems like Wodger. And that is a cat amongst the pigeons in the Bryah. IMO.

Just got to wait for a few more months for the drilling to wrap up, assays to come in, and DHEM and IP to get done and interpreted.

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OR Blythefan the veined chalcocite- bornite may be at the fringes of the VMS and the DHEM lights it up - probably TOO CLOSE to the cross fault.

AUR Price at posting: 7.1¢ Sentiment: Buy Disclosure: Held
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OR Blythefan the veined chalcocite- bornite may be at the...

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