Thorium–bitumen mineralization in Silurian sandstones, Welsh Borderland
- 1 March 1989
- journal article
- Published by Mineralogical Society in Mineralogical Magazine
- Vol. 53 (369) , 111-116
- https://doi.org/10.1180/minmag.1989.053.369.13
Abstract
The Llandovery Folly Sandstone near Presteigne, Powys, contains disseminated thorium mineralization. The thorium occurs as inclusions of thorite and thorianite within sub-millimetre-scale bitumen nodules throughout the sandstone. The nodules grew replacively in situ. The two square kilometres outcrop/subcrop of the sandstone may contain over 500 tonnes thorium.Keywords
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