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Bomboré

Summary

  • 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
  • 50% of the resource occurrs within 50m of surface
  • 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 net smelter royalty)
  • Full Feasibility Study to be completed Q2 2015 for an open-pit, combined Heap Leach (HL) and CIL operation without grinding or cement agglomeration
  • High Grade HL (0.88 g/t) with High Recoveries, Low Capex and Low Opex
  • Large underlying sulphide resource that is well studied and can be processed by expansion of the simple CIL circuit
  • Mining Permit Application to be filed Q2 2015, permit expected Q1 2016
  • Resource update with additional 50,000 m of drilling to completed Q4 2015

 

Description

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 anomaly in the country. 

Approximately 50% of the total resource occurs in the top 50 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. 

Resources are open at depth and the average drilling to date is within 120 m of surface. With 35,000 oz of gold per vertical meter (0.3 g/t cut-off) in the top 60 m of the deposit, there remains an excellent opportunity to significantly increase resources at depth. Resources for the most part remain open at depth and along strike.

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

The Bomboré project is located just 85 km east of the capital city adjacent to the national paved highway. The project is in an area of low 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.

Geology

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 Bomboré Project geology is characterized by a shear zone with mafic to intermediate metavolcanic and felsic tuff rocks intruded by ultramafic, diorite and granodiorite intrusions. Layers of graphitic meta-sediments occur in places but are not considered preg robbing of materially affecting the envisioned operation.

Mineralization

All 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 arrays of quartz veins and veinlets. Gold is free and mainly associated with minor pyrite, chalcopyrite and arsenopyrite disseminations and stringers. The gold mineralization is preferentially associated with lithological contacts.

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

2015 Priorities

  • Completion of full feasibility study - Q2 2015
  • Mining Permit Apllication to be filed - Q2 2015, permit expected Q1 2016
  • Updated Resource Model to include 50,000 m of additional drilling - Q4 2015

Reports

Press Releases