Quality Control

ODM treats every sample with extra care:

Incoming samples are immediately catalogued and organized. A character subsample is archived from every sample.
In every circuit, the sample processing sequence and operator is recorded.
The quality of the mineral separation is visible at every concentration stage (shaking table, heavy liquid, magnetic, electromagnetic) as well as during final indicator mineral logging; no blind (enclosed) concentrators are used.
All shaking tables are customized to eliminate indicator mineral carryover.
Blank samples are inserted and processed between projects.
Gold grains are observed immediately in the initial tabling circuit and extra blank samples are inserted after anomalous samples.
Sieves are meticulously cleaned after each concentrate.
All sample fractions and subfractions obtained during processing are weighed and tallied to identify potential sample mix-ups. Any unreconcilable weight imbalances are assessed and immediately reported to the client in writing.
Regular heavy mineral recovery tests are conducted on all shaking tables.
Kimberlite indicator mineral results are controlled by random blind tests on spiked samples with full disclosure of test procedures and results.
Unusual mineral grains or other suspect particles observed during gold micropanning or indicator mineral logging are immediately resolved by SEM analysis.
Indicator minerals are meticulously organized by species and grain size in separate vials.