The Age of Fergusonite from the Jos Area, Northern Nigeria1

A. G. Darnley, G. H. Smith, T. R. D. Chandler and D. F. Dance
Atomic Energy Division, Geological Survey of Great Britain
National Chemical Laboratory, Teddington, Middlesex
Atomic Energy Research Establishment, Harwell, Berkshire.
1A preliminary account of these results was issued in September 1959 on a limited circulation by the Atomic Energy Division, Geological Survey of Great Britain, as Age Determination Report No. 10.

Summary: Two fergusonite concentrates from different localities in the Jos area of Northern Nigeria have been analysed by the complete lead method and are accepted as having a mean age of 159±25 m.y.

Mineralogical Magazine; March 1962 v. 33; no. 256; p. 48-51; DOI: 10.1180/minmag.1962.033.256.07
© 1962, The Mineralogical Society
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