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Two Kyt-projects:. GeochemM: U-migration and retention in granitic rock U in Water-rock Interaction. Independents. Both at a regional scale with samples of several sites from Finland and Sweden Two different approaches:

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two kyt projects

Two Kyt-projects:

GeochemM: U-migration and retention in granitic rock

U in Water-rock Interaction

independents
Independents
  • Both at a regional scale with samples of several sites from Finland and Sweden
  • Two different approaches:
    • GeochemM: U-mineralogy, migration paths characterization and dating of U-minerals
    • U in WRI: U-isotopes (U-234, U-238) and activity ratios (U-234/U-238) distribution in groundwaters
same conclusion
Same conclusion
  • Glacial melt water intrusion deep in the bedrock

Other investigations with a third approach: I.D. Clarck et al. 2000. GROUND WATER 38 no. 5,735-742

- Melt water injected into the subsurface (700 m depth) during ablation of the Laurentide Ice Sheet at ca. 10 ka under conditions of high hydraulic gradient (modelled and supported by studies of Björnson (Nature 395, 771-774).

what so
What so?
  • Site investigation studies refer to the same event (oxygen isotope values)
  • What is the fate of radionuclides (products, positon, migration rates, distances, and paths):
    • Need of mineralogical studies and characterization of possible migration paths
future prospects
Future prospects
  • Main report (TKK-series) with last findings and modelling approach
  • Publications to referee journals:
    • U-mineralogy (chemistry) and migration
    • U-mineral dating and connection to glacial cycles
    • Modelling approaches (reactive models for radionuclide migration in granitic rocks)