IVR was doing partial leach tests on soils samples from Cartarpo. Here is what I found out on Labwest's web site.
Partial Leach approaches are used where it is desired for metals to be extracted from surface coatings of soil grains, without dissolving the underlying host matrix. Metals adsorbed onto these outer layers or held in metallic oxide coatings on soil grains may have been mobilised through the soil profile, and can give good indications of orebodies deep under cover.Different leaches apply to different soil types, with some being more specific than others.
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