• Shear-zone hosted: 11 km long x 200 m average width
  • 4.56 Moz of Measured & Indicated and 0.72 Moz of Inferred resources (April 2013) within optimized open-pit shells
  • Average depth of drilling to date is 120 m
  • 85 km from Capital City, adjacent to major highway with nearby power and water
  • 100% owned subject to a government 10% free carried interest and a 3-5% net smelter royalty (“NSR”) as well as a 0.45% NSR held by Sandstorm Gold Ltd. that can be repurchased for $3.3 to 3.9M prior to January 2018)
  • Full Feasibility Study completed in April 2015 for an open-pit, combined Heap Leach (HL) and CIL operation without grinding or cement agglomeration with 87% recovery
  • $250M USD capex, AISC of $687/oz, 24.4% after-tax IRR, Strip ratio of 1.1:1. 11yr Mine Life
  • Production Profile for first eight years 135,000 oz/yr at a grade of 0.88 g/t.  Processing lower grade stockpiles for years 9-11
  • Large underlying sulphide resource is well studied and can be processed by via an expansion of the standard CIL circuit
  • Exploration permit expires February 2016 however, the mining permit application was filed in May 2015 with the permit expected Q1 2016.
  • Resource update with additional 50,000 m of drilling to be completed Q4 2015



Orezone's 168 km2 Bomboré Project is the largest undeveloped gold deposit in Burkina Faso. Gold resources occur at surface in several zones contained within a gold-in-soil anomaly that extends virtually uninterrupted at a level of +0.1 g/t for 14 km and represents the largest gold –in-soil anomaly in the country. 

Approximately 40% of the total resource occurs in the shallow weathered horizon (average depth of about 45 m) and economic pit shells that constrain the resource can reach depths of up to 200 m if the geological model proves to continue at depth, and as much as 95 m in the current mining plan that is targeting the weathered horizon.

Resources for the most part remain open at depth where there is excellent potential to further increase the sulfide resources. Short range strike extension potential as well as new targets suggest that additional shallow weathered mineralized material can also be added to the current mineral resources and mineral reserves.

The Company plans to develop the project as a combined HL and CIL operation that does not require any grinding or cement agglomeration and should yield overall recoveries of 87%.  The standard CIL circuit could be expanded at any time to process the large underlying sulphide resource.

The Bomboré project is located just 85 km east of the capital city adjacent to national paved highway RN4. The project is in an area of moderate population density, and local infrastructure includes a high voltage power line nearby, access to sufficient water and a local labor force. These infrastructure advantages should translate into reduced operating and development costs.


The Bomboré shear zone represents the dominant structure in the permit area. This kilometer-thick arcuate shear zone is interpreted as a subsidiary structure to the regional Tiébéle-Dori-Markoye fault.

The permit area is underlain mainly by a meta-sedimentary flysh-type sequence dominated by meta-sandstones with subordinate carbonaceous meta-pelites and polymicticmeta-conglomerates.  This metasedimentary sequence is intruded by early meta-gabbroic and ultramafic (peridotitic) intrusives and then syntectonic granodioritic intrusives.  Late-tectonic quartz-feldspar porphyries occur as dikes and larger bodies within the greenstone belt.  Large biotite granite intrusives are present to the west and to the south of the greenstone belt that is also molded on a large quartz diorite intrusive located along the eastern limit of the project area. The carbonaceous meta-sediments represent about 6% of the mineral reserves and the metallurgical test work has identified a very low preg-robbing index for this material.  The material should not represent any metallurgical recovery issue given the designed processing methodology.


All of the Bomboré gold mineralization occurs within the main Bomboré shear zone and is associated with silica, sulphide and carbonate-albite-tourmaline-biotite alteration as well as minor arrays of quartz veins and veinlets. Gold is free and mainly associated with a low-sulfide (±2%) assemblage of pyrite, chalcopyrite and arsenopyrite disseminations and stringers. The gold mineralization is also preferentially associated with lithological contacts.

Bomboré 2013 Oxide Resource Pitshell Outlines at $1400 Gold- Includes Drill hole Composite Grades projected to Surface

2015 Priorities


  • Completed NI43-101 Compliant feasibility study - April 2015
  • Mining Permit Application filed May 2015, permit expected Q1 2016
  • Updated Resource Model to include 50,000 m of additional drilling - Q4 2015


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