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alimak

813 Posts.

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29/11/18

23:38

Post #: 36696639
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Originally posted by jezzathegeo ↑

Originally posted by jezzathegeo
Geophysics is very much horses for courses. There are many techniques and even more styles of mineralisation. The IP-based techniques are generally applied to sulphides; mag and rad identify lithology and structure and are invaluable for structurally controlled mineralisation and mapping; grav and seismic can pick up large scale structure and lithology.
None of these techniques tells you whati's in the ground, they identify a potentially good place to drill. And all are subject to the interpretation of the geophysicist. Several times I've drilled a down hole conductor at one orientation for no result, only to hit something at another orientation using an alternative interpretation. You need good data and a good geophysicist with an open mind, prepared to reinterpret the data as new evidence is secured.
Been a while, but I'm out bush again, this one in Mongolia. I'll write some more comments on mining, if only to keep me off the fermented horse piss and out if Orange Night Club

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