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 and E. R. Preece
Atomic Energy Division, Geological Survey of Great Britain
National Chemical Laboratory, Teddington, Middlesex
Atomic Energy Research Establishment, Harwell, Berkshire

Summary: 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.

Mineralogical Magazine; March 1961 v. 32; no. 252; p. 716-724; DOI: 10.1180/minmag.1961.032.252.05
© 1961, The Mineralogical Society
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