Geology and genesis of the Musha-Ntunga Sn-Ta-Li-Nb vein-pegmatite deposit, Rwanda: first results from deep drilling of a coltan mine in Rwanda and first detailed description of Li minerals. Issue 2 (3rd April 2019) - Goodship, A.; Dace, A.; O'Hare, P.; Uwiringiyimana, J.; Siddle, R.; Moon, C.