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Sabodala is situated within the West African Birimian geological gold belt in a region of Senegal that has only recently been opened for mining and exploration but already established itself as significant gold camp with more than 10 million ounces discovered. The Sabodala gold project is the only large-scale, gold mine to come into operation in Senegal.

Sabodala
gold mine

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Sabodala Gold Mine


Focused on Increasing Long-Term Sustainable Free Cash Flow

Teranga is focused on increasing long-term sustainable free cash flow through a three-pronged growth plan which is based on achieving: (i) reserve growth; (ii) production growth; and (iii) margin expansion.  Ultimately we believe we can expand our operations beyond Senegal within West Africa where we can leverage our existing asset base, people, operating experience, social license and other aspects of our business.

Geology and Mineralization

Regional Geology

The Sabodala Mining Concession and the surrounding exploration permits are located within the highly prospective Kedougou-Kenieba Inlier which forms part of the Paleoproterozoic age Birimian Terrane of the West African Craton. The permits straddle the volcanic-dominated Mako Supergroup in the west and the sediment-dominated Diale-Dalema Supergroup to the east.

The Mako and Diale-Dalema supracrustal sequences are intruded by a series of variably deformed granitoid intrusions. Lithologies in the region are affected mainly by lower green schist grade metamorphism. Northeast trending intermediate to felsic and later, post-tectonic mafic dykes are present throughout the region, the latter forming prominent linear magnetic features. Felsic and intermediate composition dykes are often spatially associated with shear zones hosting gold mineralization, and locally are host to significant gold mineralization themselves.

Local Geology

The Sabodala deposit is situated in the Mako Volcanic Belt. Locally the volcanics are intruded by subvolcanic dolerite and gabbro sills and dykes and also quartz feldspar porphyry and rhyolite dykes. Interflow sediments parallel the layering in the sequence. The Sabodala Shear Zone is approximately 2km wide and is identified by a subtle magnetic trend that extends through the 7km long permit and transects volcanic stratigraphy. The shear zone plays an integral part in the localization of gold mineralization. 

The largest and best understood deposit in the Company's portfolio of properties is Sabodala due to its production status and size, so this deposit and controls on mineralization are well understood. Gold deposits on the adjacent OJVG properties are of similar style, and include primarily high grade shear vein systems and bulk tonnage, lower grade mineralization in carbonate altered ultramafic rocks along shear zones.

Mining and Processing

Mining of the Sabodala open pit is carried out by owner-operated conventional truck and shovel open pit mining.

The mine plan uses two cut-off grades for production assumptions. The higher cut-off grade is used to define material that can be treated economically in the plant at the time of production, whereas the material above the incremental cut-off grade will be mined and stockpiled and, depending on the economics of production at the time, will be treated at the end of the mine life.

The mining schedule is driven by balancing the truck hours required to deliver ore to the Run of Mine (“ROM”) pad and waste to the dumps annually in concert with the loading capacity. Ore in excess of process plant requirements is selectively stockpiled throughout the life of the operation.

To date, the ore treated by the Sabodala processing plant has been sourced  from Sabodala, Masato, Gora, and Golouma.

The gold is recovered in the 89%-92% range with an average grind of 80% passing 75μm. There is potential for additional recovery and performance improvement with installation of a gravity circuit. The gold extraction process uses a conventional carbon-in-leach (“CIL”) flowsheet. The major equipment comprises of two stage crushing with a primary jaw and secondary cone crushing system. This is followed by one SAG mill transferred into a return pebble crusher, sizer by cyclone and two ball mills. During the leaching process, the gold leaches into solution in leach tanks when in contact with cyanide, then absorbs onto the carbon to liberate gold from the ore before being captured with the activated carbon. After elution and electrolysis, the gold is recovered by fusion and poured into doré bars.

The Sabodala processing plant was expanded in late 2012 to a design capacity of approximately 3.5 Mtpa (fresh ore) and 4.0 Mtpa with a mix of fresh and oxidized ore. 

Mill Optimization Project

A mill optimization project was launched in mid-2015, which will add a second primary jaw crusher, screen and conveyor assembly to tie into our existing facility when it is completed in the fourth quarter of 2016.  

Basic engineering for the mill optimization was completed in the first quarter of 2015 to finalize the design, layout, material quantities, procurement packages and an execution plan for construction. 

Upon completion and ramp-up, the mill optimization is expected to increase throughput by up to 15% on an annualized basis for fresh ore; however, there may be potential to increase throughput further based on optimization of the grinding circuit once steady state has been achieved. In addition to higher production, unit processing costs are expected to decrease by approximately 5 percent. As of mid-2016, the project remains on schedule for completion in the third quarter 2016 with commissioning and full ramp up during the fourth quarter 2016. 

For further details on the Company’s mineral processing activities, please refer to Chapters 13 of the Sabodala Technical Report.

The Sabodala mine generates its own power which is sourced from a 30 MW heavy fuel oil power station with an additional reserve of a 6 MW unit. The mine has ample water supply drawn from two dams with a combined capacity of approximately 11 million cubic metres, which can also be supplemented if required from water sourced via a pipeline from the Faleme River.

Pictures

Sabodala
Mine License

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Sabodala
Pit

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Sabodala
Process Plant

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