The first of Banro's two gold mines, Twangiza has a Mineral Reserve of 1.82 Million ounces of gold.
Twangiza became Banro's first producing open pit gold mine in October 2011, and commenced commercial production in September 2012. With mill throughput currently operating at capacity levels of 1.7 million tonnes per year, Twangiza in 2016 produced 104,438 ounces of gold. The mine has an expected life of 14 years from currently defined reserves.
The property is located 45 kilometres south-southwest of Bukavu in South Kivu Province and consists of six Exploitation Permits covering 1,164 square kilometres in the highly-prospective 210km long Twangiza-Namoya gold belt.
Twangiza is the most advanced of Banro's four properties with a Mineral Reserve of 27.67 million tonnes grading 2.05 g/t Au containing 1.82 million ounces of gold. Measured and Indicated resources at Twangiza are 99.35 million tonnes grading 1.47 g/t Au containing 4.69 million ounces of gold plus an Inferred Resource of 9.83 million tonnes grading 1.17 g/t Au containing 370,000 oz Au. The updated resource calculation used a cut-off grade of 0.4 g/t Au.
The Twangiza deposit is comprised of two resource components - an oxide portion and a transition rock/fresh rock (non-oxide) portion. The current activities involve mining and processing a blend of both oxide and non-oxide material within the reserve pit shell using the existing plant. Exploration activities are focused on growing the oxide resource.
The most recent technical report with respect to Twangiza that has been filed by Banro on SEDAR is dated July 29, 2015 and entitled NI 43-101 Technical Report, Mineral Resource and Reserve Update, December 31 2014, Twangiza Gold Mine, Democratic Republic of the Congo. A copy of this report may be accessed at www.sedar.com.