[en] This report is the study carried out by a mission about the main metallic mineralization and geochemical anomalies in Uruguay

[en] Published in summary form only

[en] This document is about a methodological study of Presidente Terra mining focused in chemical and soils results and their interpretation and determination as a possibility over the samples.

[en] This report shows the geochemical prospect ion results carried out within the framework of the multielemental geochemical strategy. The samples were studied by e spectrometry in the laboratories of Orleans.

[en] The outline for this presentation includes: Brief background and research, Actinide Analytical Chemistry, Some pertinent job categories for Post Docs, and Organizations for specific skills.

[en] Mechanisms of substance migrations in zones of contact metamorphism and main regularities in uranium deposit formation under these conditions are considered on the basis of quantitative petrochemical, radiogeochemical and thermobaric data. A geochemical model of these processes is suggested. The developed model of uranium mineralization is determined by storage of primary potential uranium reserves in the course of earlier geological history, by its transition to potential-mobile form, by appearance of the aureole of highly compact aquatic-carbonic acid fluid, by alteration of physico-mechanical properties of rocks in the progressive phase of contact metamorphism, by combination of further thermal and tectonic history of the development of the given area in the regressive phase. Each of these factors can be realized by different geological processes and with different intensity, but only their successful coincidence results in formation of large deposits

[en] Around the rhodanian basin, coastal deposits contain uranium occurrences, either within kaolinite levels equally enriched with few metals (Li, Cr, V) or within lignites. In the first case, the syngenetic accumulation might be sourced from lateritic paleosols while in the second case, there is epigenetic accumulation removed by organic matters after oxidized ground water moving

No abstract available

[en] Major and trace elements, rare earths, and ¹⁴³Nd/¹⁴⁷Nd and, ¹⁴⁷Sm/¹⁴⁴Nd isotope ratios have been determined in the Puna Austral and Cordillera Oriental basement. The basement is formed by high temperature amphibolite facies rocks ranulites (750-550 degrees C) and green schists. They are represented by schists, paragneiss, orthogneiss, migmatites, few metabasites, marbles and chalcosilicatic banks. Hypotheses on the formation and evolution of the basement are presented

[en] In the paper the investigation method of dynamic change of the concentration level of radioactive pollutant elements with half-lifeT_1/2> 1 year on the land depended on year season has been considered. The method of variance mathematical analysis has been considered for study of dynamic of the oscillation of measured values.