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inconsistency of grades (3 replies)
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Hi all we have a mining operation, and our lab cannot explain the fire assay results provided, we did quite extensive test work on the ore and have received inconsistent results.
Once the ore is delivered to our site the ore tests at 40-60 g AU per ton this will be three samples from a 10 cube truck.
This obviously makes as hell excited, however a week later the same pile will be sampled and a consistent grade of between 3-6 g/ton is tested.
What can the cause of this be is there a possibility of chemicals that someone can throw on the ore to give false readings?
Thanks in advance for assistance herein.