The bauxite deposits within the Compagnie des Bauxites de Guinée (CBG) lease are of two general types. TYPE 1: In-situ laterization of Ordovician and Devonian plateau sediments locally intruded by dolerite dikes and sills. TYPE 2: Sangaredi type deposits are derived from clastic deposition of material eroded from the TYPE 1 laterite deposits and possibly some of the proliths from the TYPE 1 plateaus deposits.

The Sangaredi site is an open cut mine including the following operations: stripping, drilling, blasting, loading, hauling. At Sangarédi, bauxite is produced according to a well-executed mining plan. The process consists of drilling holes in the mine, loading them and blasting them with the ANFO explosive. The hole pattern is designed to achieve optimal ore fragmentation. After this operation, the bauxite is loaded into 77-100 metric ton trucks and transported to the homogenisation stockpiles at N'Dangara. It is then loaded into trains (120 cars of 82 tonnes each) which transport it to the Kamsar plant. The production flow is maintained continuously through a rotation loop.

The bauxite is transported by railway cars approximately 135 km away from Sangaredi to Kamsar. At Kamsar, the raw material is crushed in a giant workshop and handled to the production control stocks or to the drying kilns. The crushed and dried bauxite is then sent for loading onto ships with capacities ranging from 50 to 70 thousand tonnes on average. In Kamsar, the installations include the following assets: locomotive repair shop, railway cars unloader, primary crusher, secondary crusher, scrubbers, conveyors, stacker, reclaimer, bauxite dryers, dry bauxite storage, bauxite sampling tower, power house, wharf, ship loader, etc. The crushing plant is used only to reduce oversize material – no screening required. Four bauxite dryers are installed in order to reduce the moisture content of the bauxite before shipping. With the expansion of our operating capacities, we will produce up to 19 million tonnes per year in the first phase, 25 million tonnes in the second and possibly 28 ........