The Pocos de Caldas Project

Part 1 The Pocos de Caldas Project - an introduction and summary of its implications for radioactive waste disposal: the regional geology of the Pocos de Caldas alkaline complex - mineralogy and geochemistry of selected nepheline synenites and phonolites; hydrothermal and supergene uranium mineralizaiton at the Osamu Utsumi mine, Pocos de Caldas, Minas Gerais, Brazil; the supergene thorium and rare-earth element deposit at Morro do Ferro, Pocos de Caldas, Minas Gerais, Brazil; origin and growth rates of pitchblende nodules at the Osamu Utsumi mine, Pocos de Caldas, Brazil; isotopic geochemical characterization of selected nepheline syenites and phonolites from the Pocos de Caldas alkaline complex, Minas Gerais, Brazil; geomorphological and hydrogeological features of the Pocos de Caldas caldera analogue study sites; ground waste chemistry and geochemical modelling of water-rock interactions at the Osamu Utsumi mine and the Morro do Ferro analogue study sites, Pocos de Caldas, Minas Gerais, Brazil; natural decay series studies of the redox front system in the Pocos de Caldas uranium mineralization; the interpretation of 238U-234U-230Th-226Ra disequilibria produced by rock water interactions; uranium and thorium isotopes in groundwaters from the Osamu Utsumi mine and Morro do Ferro natural analogue sites, Pocos de Caldas, Brazil; rare-earth elements in groundwaters from the Osamu Utsumi mine and Morro do Ferro analogue study sites, Pocos de Caldas, Brazil; light rare earth elements and natural series radionuclides within the Morro do Ferro; chemical and physical characterization of suspended particles and colloids in waters from the Osamu Utsumi mine and Morro do Ferro analogue study sites, Pocos de Caldas, Brazil; microbiological analysis at the Pocos de Caldas natural analogue study sites; testing models of trace element geochemistry at Pocos de Caldas; movement of the redox front at the Osamu Utsumi uranium mine, Pocos de Caldas, Brazil; geochemical modelling of uranium redistribution in the Osamu Utsumi mine, Pocos de Caldas; redox front geochemistry and weathering - theory with application to the Osamu Utsumi uranium mine, Pocos de Caldas, Brazil; near-field high temperature transport - evidence from the genesis of the Osamu Utsumi uranium mine, Pocos de Caldas alkaline complex, Brazil. Part 2: Natural analogues for the design and performance of radioactive waste forms - a review: natural analogues for predicting the reliability of the engineered barrier system for high-level waste; using data from natural environments to improve models of uranium speciation in groundwaters; a review of the application of natural analogues in performance assessment - improving models of radionuclide transport in groundwaters; a natural analogue of high pH cement pore waters from the Maqarin area of northern Jordan - introduction, results of predictive geochemical calculations.