The Asanko Gold Mine comprises two large deposits, Nkran (currently in production) and Esaase, a number of satellite deposits (Abore, Asuadai, Akwasiso, Dynamite Hill, Nkran Extension, Adubiaso and Adubiaso Extension) and a 3Mtpa carbon-in-leach (CIL) processing plant facility. It is wholly-owned by Asanko, with a 10% free carried interest held by the Government of Ghana that becomes effective once commercial production is declared.
The Nkran deposit is located within the Kumasi Basin on the "Asankrangwa gold belt". The basin is bound to the south by the Ashanti Fault/Shear and the Bibiani shear to the north. The Asankrangwa gold belt expresses itself as a complex of northeast trending shear zones situated along the central axis of the Kumasi Basin. The Nkran deposit is located on a jog along the regional Nkran Shear, which is a zone of about 15 km in width and may be traced on a northeast to southwest trend for a distance of some 150 km. This is one of several major northeast trending shears/structures that bisect the Kumasi Basin/Asankrangwa Gold Belt.
The regional/local (Kumasi Basin) geological setting is heavily faulted and consists of an isoclinally folded sequence of metasediments, dominated by turbiditic sequences of greywackes and shales, intercolated with rare andesites and volcanoclastics, previously described as greywackes, phyllites, argillites and shales.
Production at the Nkran pit is a contractor mining operation which utilizes a conventional truck and shovel method. The production schedule has been designed to maintain a consistent stripping ratio through the life of the operation. The LoM average operating strip ratio is 4.7:1.
The plant design is based on a typical single stage crushing, SAG, ball milling circuit and CIL flow sheet. This process flow sheet is well known in industry, and is relatively low risk as it has historically been proven a successful processing route for the Nkran ores during the Resolute Mining operations, 1998 to 2002.
The Asanko Gold Mine currently consumes up to 18MW of power. Asanko has built a 30km long, 161kV power line connecting the Project site to the national power grid at the Asawinso substation, which was completed in November 2015, along with the 161/11kV substation at site. In February 2016, Asanko signed a five-year power purchase agreement with the Volta River Authority (VRA), the state authority, at rates materially in line with the Definitive Project Plan. In addition the Company has also installed 20MW of diesel generator capacity as a 100% redundant back-up supply of power.
The Asanko Gold Mine currently employs approximately 1,700 people; 369 full time employees, 1,184 contractors, including 580 mining contractors, and 139 temporary staff and attachments. Approximately 97% of the total workforce are Ghanaians, of which around 44% are from the local communities surrounding the mine.
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