30 Seconds of Info – QAQC: employ a minimum of 4 CRMs or Standards at any one time

Employ a minimum of four Certified Reference Materials (CRM’s or Standards) at any one time:  A typical protocol is to insert CRMs that allow assay accuracy to be monitored at grades equivalent to the anticipated (or known) break-even cut-off grade, the average mineralisation or ore grade, and at a high grade for the deposit.  The fourth CRM should be similar to, but different from, one of these three values – typically the average grade value.  For small drilling campaigns, it may be necessary to increase the CRM submission rate to ensure that a statistically meaningful number of results are obtained for each CRM.

This week’s 30 Seconds of Info comes from Paul Blackney our Principal Geology Consultant  pblackney@snowdenoptiro.com

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