Members Johnny'sGotTheBlues Posted November 27, 2008 Members Share Posted November 27, 2008 Well, yeah it is mostly hard rock but there's a lot of regolith stuff involved as well as diagenesis and hypogene/supergene geochemical processes that come into play. It's {censored}ed up I tell ya, but in a GOOD way . The rocks are so {censored}ed up that they're full of iron! Proterozoic Banded Iron Formation is the major host rock. Then heaps of weird stuff happened that got rid of the silica and more iron precipitated. Then there's also later enrichment as well as Channel Iron Deposits and detrital material accumulated and later altered to form more deposits. We have a consultant geophysicist, but also a contract geophysical logging service that does the gamma & density logging of the drill holes, I think they use cadmium-60 as the radiation source. We mostly use it to correlate & help define the stratigraphy. Here's a shot of the mineralisation boundary in outcrop. Ok, that makes sense.We use logging tools too - quite a few more than just gamma and density. And we use them for the same reasons, correlating the stratigraphy.What I do though is use reflection seismic to fill in the spaces between the boreholes (wells) we log.One of the locations I picked in our last little drilling program is looking like it might be the best or second best well the company has. Just before bonus time! I'm golden around here for a while (till the next dry hole!). Link to comment Share on other sites More sharing options...
Members petejt Posted November 30, 2008 Author Members Share Posted November 30, 2008 ^^ cool Hopefully your discovery turns out well! Link to comment Share on other sites More sharing options...
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