Abstract
Uranium occurrences are mainly located in the Penninic and Helvetic Zones of the Swiss Alps, in which they occur in a relatively narrow zone from the French border to the southwest along the Rhône and Oberrhein (Anterior Rhine) Valley to Ilanz in the northeast and from there northwards to Walensee (Lake Walen). Most occurrences are in Upper Carboniferous–Permian–Lower Triassic clastic (meta)sediments and pyroclastics (Verrucano), and a few in granitic rocks. As elsewhere in the Alps, ore in all occurrences known to date tend to be of unpredictable distribution, little continuity, small in magnitude, and variable in mineral concentrations and ore contents with commonly low average grades, although some contain impressive grades in spatially limited or spotty ore intervals.
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Notes
- 1.
The ore is unpredictably distributed in space and grade in the tectonically complex terrane of the Col des Mines-Nendaz uranium zone. In consequence, the given resource figures may only demonstrate an order of magnitude.
References and Further Reading for Chapter 18 · Switzerland
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Bächtiger 1963; Burkhard 1982; Burkhard et al. 1985; Bussy et al. 2001; Davis 2013, Eikenberg et al. 1989; Gilliéron 1988; Hügi and de Quervain 1958; Hügi et al. 1962, 1967; Kramers 1973; Kuehnbaum 2011a,b; Labhart and Rybach 1972, 1974; Labhart 1967; Meisser 2012; Urania Ltd. 2010; von Pechmann and Bianconi 1982; von Pechmann 1985; Labhart (lecture at Univ Bern, March 26, 1984); pers. commun. by Bianconi F 2011.
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Dahlkamp, F.J. (2016). Switzerland. In: Uranium Deposits of the World. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-78554-5_18
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DOI: https://doi.org/10.1007/978-3-540-78554-5_18
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