MMI soil sampling is an advance geochemical exploration technique proven in finding mineral deposits, particularly at depth where it has a distinct advantage over standard soil sampling.
Its advantages include: few false anomalies, sharply defined anomalies, repeatability, defined metal zones and associations, detection of deeply buried mineralization, low noise, and low limits of detection.
It works by measuring metal ions with have traveled upward from mineralization to unconsolidated surface materials (such as soil, till, sand, etc). Using specific soil sampling strategies combined with advanced instrumentation and chemical ligands it is possible to measure these ions, and through various interpretation methods we employ to identify anomalous areas.
These methods typically include in-depth interpretation applied to ratio histograms and plan maps.
More information on MMI soil sampling can be found here.