Geological setting and geochemistry of uranium-rich granites in the Proterozoic of Sweden
- 1 June 1982
- journal article
- Published by Mineralogical Society in Mineralogical Magazine
- Vol. 46 (339) , 233-245
- https://doi.org/10.1180/minmag.1982.046.339.10
Abstract
Uraniferous granites occur in several different geological settings in the Swedish Precambrian and represent a variety of granite types and ages. Granites with > 10 ppm U are highly differentiated leucocratic alkali granites with initial87Sr/86Sr ratios over 0.708. They commonly show enrichment in F, Sn, W, and/or Mo, while mineralization of these dements may, in some cases, be found in the nearby country rock. Radiogenic heat from the granites may have assisted hydrothermal circulation. In only one case, Hotagen, is important U mineralization thought to be directly related to a U-rich granite, while the majority of epigenetic U mineralizations with economic potential are related to hydrothermal processes in areas where the bedrock is regionally enhanced in U.Keywords
This publication has 28 references indexed in Scilit:
- Age and isotope studies in Norrbotten and Småland: Preliminary resultsGeologiska Föreningen i Stockholm Förhandlingar, 1982
- Uranium-rich granites in the Olden Window, SwedenMineralogical Magazine, 1982
- The mineralogy and genesis of uranium in rhyolitic ignimbrites of precambrian age from Duobblon, SwedenMineralogical Magazine, 1982
- Magma types and the tectonic evolution of the Swedish ProterozoicInternational Journal of Earth Sciences, 1982
- A proterozoic subduction zone in southern SwedenEarth and Planetary Science Letters, 1980
- Ore-bearing potential of granitic rocks from the Jos—Bukuru Complex, northern NigeriaChemical Geology, 1980
- The nature, ascent and emplacement of granitic magmasJournal of the Geological Society, 1979
- The evolution of a uranium province in northern SwedenPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1979
- Do leptites represent precambrian island arc rocks?Lithos, 1979
- Gravity Measurements over the Bohus Granite in SwedenGeologiska Föreningen i Stockholm Förhandlingar, 1967