One more thing, Stewie, in terms of hole depths!
Remember, that these targets being drilled will have little to no overburden. Thin overburden is not only positively significant when considering economic mineability. It's also significant in exploratory drilling. Aside from the fact that shallow OB greatly diminishes, if not removes, the chances of hitting magnetic sands and other false anomalies, consider the fact that a 150m hole will probably be nearly all in bedrock.
- Imagine the difference if the overburden were much greater, say 50-100m or more and the resulting percentages of 'target rock' vs. OB waste in sample. For example, with 100m of OB, you'd have to drill to 250m, to get 150m of bedrock core, and so on. Not only more difficult (deeper OB increases probability of complications), but more costly.
Therefore, these 2.5" core holes should be adequately deep to get a good sample & a good handle on the anomalies... i.e., in my fairly uneducated opinion!
Best,
-j
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