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Two Kyt-projects:

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:

bainbridge-gourley
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Two Kyt-projects:

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  1. Two Kyt-projects: GeochemM: U-migration and retention in granitic rock U in Water-rock Interaction

  2. 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

  3. 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).

  4. 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

  5. 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)

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