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Sm-Nd system in total rock open versus closed isotopic composition in zones of high deformation
(2002-12-01)
High strain shear zones of Brasiliano age, developed in Paleoproterozoic basement gneiss of the Caicó region, Borborema Province, NE Brazil, were associated with medium- to low-grade metamorphism and deformational processes ...
The use of isotopes in evolving groundwater circulation models of regional continental aquifers: The case of the Guarani Aquifer System
(2019-01-01)
The Guarani Aquifer System (GAS) has been studied since the 1970s, a time frame that coincides with the advent of isotopic techniques in Brazil. The GAS isotope data from many studies are organized in different phases: (a) ...
Carbon isotope fractionation during calcium carbonate precipitation induced by urease-catalysed hydrolysis of urea
(ELSEVIER SCIENCE BVAMSTERDAM, 2012)
Stable carbon isotopic fractionation during calcium carbonate precipitation induced by urease-catalysed hydrolysis of urea was experimentally investigated in artificial water at a constant temperature of 30 degrees C. ...
Comparative study of the determination of (238)U, (232)TH, and (40)K in geological samples using INAA and gamma-ray spectroscopy
(Associa????o Brasileira de Energia Nuclear, 2019)