JOHANNESBURG (miningweekly.com) – The Rwandan government is seeking expressions of interest (EOIs) for the Musha–Ntunga tin deposit, in the Rwamagana district, 50 km east of the capital Kigali, the Ministry of Natural Resources (Minirena) said on its website.
Belgian companies started mining, which was mainly done in openpits, at Musha–Ntunga in the 1940s and progressively handed over to artisanal mining subcontractors.
The mine has been the site of exploitation of cassiterite principally, but to a lesser extent niobotantalite (also called coltan) and wolframite.
Minirena said the origin of the mineralisation in the property was directly related to pegmatitic intrusions and the cassiterite mineralisation is mainly found in pegmatite and quartz veins hosted in metasediments.
The cassiterite content yielded in the past varied between 1 kg/m3 to more than 10 kg/m3. Up to the end of the 1990s, the total production of Musha was about 9 000 t of cassiterite, a significant portion of which was mined from the alluvial deposits.
Interested parties had until May 30 to submit EOIs to the deputy director at the Geology and Mining Department.