Geology Development and Evaluation of Meya Kimberlite Dyke System, Kono District, Sierra Leone

POSTER PRESENTATION

Diamonds were first discovered in the Kono district of Sierra Leone at Monkey Hill, the location of the active Koidu mine, by the British Geological Survey in 1933. The Meya dyke system is part of the Koidu kimberlite cluster that extends for approximately 2.5 km west of the Koidu mining lease. This specific area of Kono is significant because at least five mega diamonds greater than 500 cts have been recovered. Four of the five mega diamonds were discovered by small-scale artisanal miners focused on washing alluvial material; however, the 476 ct Type IIa Meya Prosperity (originally > 500 cts - broken during recovery) was recovered during bulk sampling of the Meya kimberlite system in 2017. Kimberlite dyke evaluation is more challenging in comparison to kimberlite pipe evaluation. The approach taken for the 3D geology and resource development of the Meya dyke system will be presented in this contribution.

Authors:

Casey Hetman | SRK Consulting Diamond Group Vancouver, Canada

Grete van Staden | SRK Consulting Diamond Group Vancouver, Canada

Amy Mailey | SRK Consulting Diamond Group Vancouver, Canada

Herman Grütter | SRK Consulting Diamond Group Vancouver, Canada

Kimberley Webb | SRK Consulting Diamond Group Vancouver, Canada

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Presenters