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Mostrando ítems 11-20 de 205
Análise do comportamento dos isótopos radiogênicos durante os processos de migmatização
(Universidade Estadual Paulista (Unesp), 2005-04-04)
Foram usados estudos de mobilidade de elementos geoquímicos, isotópicos e petrológicos para investigar o comportamento dos isótopos radiogênicos Rb/Sr, Sm/Nd e U/Pb na formação de, migmatitos estromáticos e diatexiticos ...
DIFFUSION MODELS IN METAMORPHIC THERMOCRONOLGY: PHILOSOPHY AND METHODSMODELOS DE DIFUSÃO EM TERMOCRONOLOGIA METAMÓRFICA: FILOSOFIA E MÉTODOS
(Sociedade Brasileira de Geologia, 2017)
Análise do comportamento dos isótopos radiogênicos durante os processos de migmatização
(Universidade Estadual Paulista (UNESP), 2014)
The effect of hydrothermal alteration on the Sr and Nd isotopic signatures of the Barra do Itapirapua Carbonatite, Southern Brazil
(Univ Chicago Press, 1999-03-01)
The Cretaceous Barra do Itapirapua carbonatite in southern Brazil experienced extensive postmagmatic hydrothermal alteration. In this article, Sr and Nd isotope ratios of coexisting samples of hydrothermally overprinted ...
The effect of hydrothermal alteration on the Sr and Nd isotopic signatures of the Barra do Itapirapua Carbonatite, Southern Brazil
(Univ Chicago Press, 1999-03-01)
The Cretaceous Barra do Itapirapua carbonatite in southern Brazil experienced extensive postmagmatic hydrothermal alteration. In this article, Sr and Nd isotope ratios of coexisting samples of hydrothermally overprinted ...
Chronologic constraints on hominin dispersal outside Africa since 2.48 Ma from the Zarqa Valley, Jordan
(2019-09-01)
Recent discoveries constrain the presence of hominins in North Africa since ca. 2.4 Ma and in China since ca. 2.1 Ma, providing a new temporal framework for the earliest migration out of Africa. No Paleolithic sites of ...
Dissolved uranium, radium and radon evolution in the Continental Intercalaire aquifer, Algeria and Tunisia
(Elsevier B.V., 2014-11-01)
Natural, dissolved U-238-series radionuclides (U, Ra-226, Rn-222) and activity ratios (A.R.s: U-234/U-238; Ra-228/Ra-226) in Continental Intercalaire (Cl) groundwaters and limited samples from the overlying Complexe Terminal ...
Control of seasonal and inter-annual rainfall distribution on the Strontium-Neodymium isotopic compositions of suspended particulate matter and implications for tracing ENSO events in the Pacific coast (Tumbes basin, Peru)
(Elsevier, 2020-01)
The geochemistry of riverine sediments exported to the oceans is important for paleo-hydro-climatic reconstruction. However, climate reconstruction requires a good understanding of the relationship between geochemistry and ...