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The majority of the diamond mines in Botswana (Orapa, Jwaneng, Letlhakane, Damsthaa, Lerala and BK11) were discovered as a direct consequence of soil sampling for indicator minerals such as garnet and picroilmenite. Over the past sixty years the application of soil sampling for indicator minerals as a primary exploration tool has diminished while aeromagnetic surveys have increased in popularity. The rate of kimberlite discovery in Botswana over the past fifteen years has declined significantly. The obvious magnetic kimberlites have been discovered. The future of new kimberlite discoveries, mainly poorly magnetic to non-magnetic, is once again dependent on soil sampling for kimberlite indicator minerals. The only mechanism to transport indicators from source to surface through the Kalahari Formation overburden is through termite bioturbation.

The magnitude of termites to the future of kimberlite exploration in Botswana