Exploration and Evaluation Experience with a Variety of Commodities
Multiple Wireline Log Potash Assay
Open-Hole Multiple Potash Assay Analyses, performed on location agree very well with wet chemistry laboratory core assay analyses received several weeks later.
This particular analysis was delivered to the client, on location, within hours of completion of the logging job.
Current software will shorten that delivery time to minutes.
High Yield Uranium Ore Density Log Contamination
Density Log Contamination by High-Yield Uranium Ore Gamma Radiation
This particular property was a candidate for in-situ leach mining. Mine design required accurate estimates of porosity in the ore zone, which were estimated from density/neutron cross-plots. Density log gamma ray sources are usually strong enough and of high enough energy that the detector count rates are not effected by variations in radio active mineral concentrations.
The above example is from a slim-hole density log in very high grade (approximately 2 % uranium oxide, by weight) uranium ore zones. The density log, shown in Track 3, has apparent density lows corresponding to depths of high gamma radiation (count rates approaching 2400 cps). Because of the high ore grade radioactivity, a density log natural radioactivity correction was developed. Track 3 also shows the natural radioactivity corrected density log. The difference between the original and corrected density log curve (as much as 0.45 – 0.50 gm/cc) is shaded.
Use of this density log natural radioactivity correction allowed the mine planning to proceed with confidence.