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desimone gold project at yara moko

desimone gold project at yara moko

Yaramoko Gold Project, Ouagadougou Mining Technology ...

The Yaramoko mining property, located near Bagassi, lies within the north east portion of the gold rich Hounde Greenstone Belt in south west Burkina Faso. The project area is divided by north north east trending Boni shear zone with the predominant Houndé volcanic and volcaniclastic rocks lying on the western portion of the mine. The eastern side comprises Diébougou granitoid domain containing granitic rock with minor volcanic rocks. The 55 zone, the target region for the feasibility study, is located within a narrow east north east trending shear zone extending downward and hosting thick, extensional quartz veins. Gold mineralisation is predominantly found in dilatational segments of the reverse dextral shear zone and takes the shape of coarse free grains in quartz. As of April 2016, Yaramokos Q1 deposit was estimated to contain inferred resources of 563,000t of ore containing 220,000oz of gold, grading 12.14g/t Au.

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Long hole open stope mining, along with a use of the cut and fill method, is being applied at the underground gold minein Burkina Faso. A mining contractor has been appointed for the first four years of underground mining, after which Roxgold will carry out the mining on its own. The underground mine is accessed by two ramps and a single portal located in fresh rock at the bottom of a planned 23m deep box cut. The run of mine ore from the underground mine is delivered to the surface by load haul trucks. It undergoes primary crushing before being transferred to a single stage semi autogenous grinding mill circuit by feeders. The processing plant is designed for a throughput capacity of 273,750tpa. The ore is processed using gravity concentration, leaching and adsorption, tailings thickening, electro winning and smelting to produce gold.

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Societe Generale Corporate and Investment Banking and Credit Suisse provided $75m of senior debt facility for the development of the Yaramoko gold project.

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Power for the mine site is supplied from the Burkina Faso electricity grid through a connection with the existing 90kV power line from the Pa substation to the Mana mine site. Diesel generators provided power supplyfor the gold mine before the connection was established. The other infrastructure facilities include a mine service area consisting offices, workshops, a warehouse, a tailings storage facility, a water storage facility, sediment control structures, mine access, haulage roads and an accommodation camp.

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A subsidiary of African Underground Mining Services was awarded the contract for conducting underground mining services at Yaramoko for a period of four years in September 2014. SRK Consulting prepared the technical report for the gold project. Mintrex was engaged to prepare the processing plant and infrastructure component for the Bankable Feasibility Study . Cardno conducted a study on power supply, electrical engineering and implementation works for the mine, while Knight Piesold was engaged for studying the tailings and water storage facilities, and water balance system. AGP Mining Consultants and Porcupine Engineering Services completed a preliminary economic assessment on the project in 2013. In March 2015, DRA Five JV was awarded a $35m engineering, procurement and construction contract to deliver a 270,000t/a CIL type gold recovery process plant and related infrastructure for the Yaramoko gold project. SGS secured an on site laboratory con...

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