1957•American MineralogistRequires access
Three Occurrences of High-Thorian Uraninite Near Easton, Pennsylvania
Arthur Montgomery
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Abstract
The geology, mineralogy, and paragenesis of three occurrences of high- thorian uraninite in serpentine near Easton, Penna., are described. Seven x-ray fluorescence analyses and three chemical analyses revealed this mineral to be high-thorian uraninite rather than highuranoan thorianite as had been supposed. Six samples contained 15 to 35% ThO/sub 2/. It was pointed out that Th rich Easton uraninites do not alter readily to secondary minerals, except when subjected to severe deformation and concomitant attack by serpentinizing hydrothermal solutions. (R.V.J.)