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K-Ar AND Rb-Sr DATING OF NANOMETER-SIZED SMECTITE-RICH MIXED LAYERS FROM BENTONITE BEDS OF THE CAMPOS BASIN (RIO DE JANEIRO STATE, BRAZIL)
ArticleAbstract: K-Ar isotopic dating has been applied to alkali-rich nanometer-sized illite separates of bentonitesPalabras claves:Basin history, Bentonite beds, Brazil), Campos Basin (Rio de Janeiro State, K-Ar and Rb-Sr isotopic dating, Scanning Electron Microscopy, Smectite and illite authigenesis, X-Ray diffractionAutores:Aubert A., Clauer N., Środoń J., Theofilos Toulkeridis, Uysal I.T.Fuentes:googlescopusSequential leaching of silicified Archaean carbonates: A Rb-Sr, Sm-Nd and Pb-Pb isotopic contribution to their tectonic-thermal history (Kaapvaal Craton, South Africa)
ArticleAbstract: Sequential leaching was completed by successive interactions of ultra-pure H2O, HAc, HCl and HNO3 wiPalabras claves:Barberton greenstone belt, Isochron vs. isotrend arrays, Post-depositional thermal events, Rb-Sr, Sm-Nd and Pb-Pb isotope systematics, REE distribution patterns, Sequential leaching procedureAutores:Alfred Kron̈er, Clauer N., Theofilos Toulkeridis, Uysal I.T.Fuentes:googlescopus