Ages of some uranium and thorium minerals from East and Central Africa

A. G. Darnley, J. E. T. Horne, G. H. Smith, T. R. D. Chandler, D. F. Dance, E. R. Preece
1961 Mineralogical Magazine and Journal of the Mineralogical Society  
The following ages determined by the complete lead method have been accepted for minerals from a number of localities: uraninite, Nkana, Northern Rhodesia, 522±15 m.y. ; brannerite, Kansanshi, Northern Rhodesia, 503±15 m.y. ; uraninite, Shinkolobwe, Katanga, 642±20 m.y. ; davidite, Mavuzi, Mozambique, 578±15 m.y.; monazite, Monkey Bay, Nyasaland, 597±25 m.y.; samarskite, north-west Kenya, 635±25 m.y. The significance of the results is briefly considered.
doi:10.1180/minmag.1961.032.252.05 fatcat:44nnu2inundkhdg3zxxoymwu4i