Abstract
An investigation of the distribution of thorium, uranium and potassium across the Levang granite-gneiss shows a significant increase in thorium and uranium from north to south. Although the mean thorium and uranium concentrations are comparable to average granitic values quoted in the literature, potassium is lower. The relative enrichment of thorium and uranium thus appears to be related to Sveconorwegian metamorphism recorded in the rocks of the adjacent Portør Peninsula to the south. The Levang granite-gneiss has recorded only the Svecofennian metamorphic event of approximately 1616 m.y.
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Contribution No. 102 to the Norwegian Geotraverse Project.
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Killeen, P.G., Heier, K.S. Radioelement variation in the Levang granite-gneiss, Bamble region, south Norway. Contr. Mineral. and Petrol. 48, 171–177 (1974). https://doi.org/10.1007/BF00383354
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DOI: https://doi.org/10.1007/BF00383354