Purepoint Uranium Group Inc (TSX-V:PTU, OTCQX:PTUUF, FRA:P5X0) earlier this week discussed how geological interpretation following drilling plays a critical role in refining exploration targets and guiding future uranium discovery efforts.
Speaking with Proactive, CEO Chris Frostad outlined the extensive work that takes place after drill core is recovered, explaining that the process extends well beyond identifying radioactivity. He said geophysical surveys are used to define potential targets by highlighting relative differences in rock properties, but they do not provide a definitive picture of the subsurface.
Proactive: Welcome back inside our Proactive Newsroom. Joining me now is Chris Frostad, CEO of Purepoint Uranium Group. Today we're discussing what happens after drill core comes out of the ground and what geologists look for in newly completed drill holes.
Chris Frostad: Purepoint is currently in the middle of a drill program and using a short break to review the information collected so far. Before drilling begins, the company relies heavily on geophysics to identify targets. Geophysical surveys do not reveal exactly what is underground but instead indicate relative differences in rock properties that help define potential targets. Graphitic conductors are particularly important, although their orientation and geometry remain uncertain until drilling confirms them.
Once the first drill hole is completed, geologists can identify rock types, faulting, graphite horizons, structural features and any radioactivity encountered. These observations help determine where the next drill hole should be located.
So one drill hole is only part of the story?
Absolutely. It generally takes at least three holes to properly understand the geology because only then can geologists begin connecting geological features between holes. Initial observations may allow immediate adjustments to the drill program, but much more work is required before the geology is fully understood.
After the core comes out, there is detailed logging, geochemistry and laboratory work before conclusions can be drawn.
That's correct. Modern technology allows geological logging, gamma probe results and other datasets to be combined into three-dimensional models. Comparing multiple drill holes helps determine the orientation of faults and structures, which is critical because these structural complexities are often associated with mineral deposits.
What happens when the drill results differ from expectations?
That happens frequently. Geologists carefully record rock types, structures, faults, seams and their exact positions while preserving the orientation of the core. These observations are compared with the original geological model. Much of the interpretation remains visual until all of the information can be integrated into modelling software. Since each drill hole can cost between $300,000 and $500,000, careful analysis is essential before deciding where to drill next.
Is that why unexpected observations often require more interpretation before additional drilling?
Exactly. A drill hole may narrowly miss a target or only partially intersect it. Geologists must determine whether to abandon the target, adjust the drill direction or complete another hole before making significant exploration decisions.
How do you ultimately use all of this information?
Exploration generates enormous amounts of geological data through geophysics, surveys, geochemistry and drilling. That information is processed using specialised software, mapping and three-dimensional interpretation techniques to build a complete picture of the subsurface and guide future exploration.
Thanks for explaining the process and providing the update.
Thank you.
Quotes have been lightly edited for style and clarity