Ages of Uraninite from two British Localities

A. G. Darnley, G. H. Smith, T. R. D. Chandler, D. F. Dance and E. R. Preece

Atomic Energy Division, Geological Survey of Great Britain, Young Street, London W. 8
National Chemical Laboratory, Teddington, Middlesex
Atomic Energy Research Establishment, Harwell, Berkshire

Summary: Uraninite from Geevor Mine, Cornwall, has been analysed by the complete lead method and an age of 290±7 million years has been accepted. Similar studies of uranium from Tyndrum Mine, Perthshire, give an age of 230±8 million years. The significance of the results is briefly considered.

Mineralogical Magazine; December 1960 v. 32; no. 251; p. 654-658; DOI: 10.1180/minmag.1960.032.251.07
© 1960, The Mineralogical Society
Mineralogical Society (www.minersoc.org)