Client name: Mana Mineral SA

Duration: 2009 – 2011; 2014

Location: Near Ouona, Burkina Faso

Coffey’s approach to executing auger drilling programs is very effective. Our rigs cover vast areas of land within a short space of time, resulting in significant cost savings.  


Mana Mineral SA is operated by Semafo Inc. which is listed on the Canadian Stock Exchange (TSX) (SMF: TSX).

With gold production and exploration activities in Burkina Faso Mana Minerals sought to identify geochemical anomaly trends to expand its geological potential.

Our task was to undertake a shallow auger drilling program, and collect samples for geochemical analysis in order to define targets for deep reverse circulation drilling.


We undertook a regional exploration program covering large areas of difficult, rugged terrain using mechanised auger drilling as a first pass geochemical investigation over the Sahel cover.

This was a large scale exploration drilling program over several licence areas. Our auger rigs completed 100,000+ metres of drilling, and we collected samples at the overburden-saprolite interface and in the underlying saprolite zone for laboratory analysis using the bottle-roll method.


New gold anomalous trends were identified over geologically favourable areas. The South Trends Complex is characterized by series of gold trends throughout a large area. Of these, the Fofina, Yaho, and Fobiri zones all demonstrate clear auger anomalies associated with the mineralisation. In fact Reverse-Circulation (“RC”), Air Core (“AC”) and core drilling were carried out on the three zones discovered in 2010 and early 2011 (Fofina, Fobiri, and Yaho) as a follow-up to the auger drilling program.