Now showing items 1-10 of 62
Denudation history of the Bocaina Plateau, Serra do Mar, southeastern Brazil: Relationships to Gondwana breakup and passive margin development
(Gondwana Research, 2010-11-01) [Artigo]
The Bocaina Plateau, which is situated on the eastern flank of the continental rift of southeastern Brazil, is the highest part of the Serra do Mar. Topographic relief in this area is suggested to be closely related to its ...
Re-Os isotope and highly siderophile element systematics of the Parana continental flood basalts (Brazil)
(Earth and Planetary Science Letters, 2012-07-01) [Artigo]
Basalts of the Parana continental flood basalt (PCFB) province erupted through dominantly Proterozoic continental crust during the Cretaceous. In order to examine the mantle source(s) of this major flood basalt province, ...
Dose de exposição radiométrica e composição das rochas sedimentares e ígneas na bacia do Rio Corumbataí (SP)
(Revista Brasileira de Geofísica, 2006-03-01) [Artigo]
Este trabalho avaliou a atividade dos radionuclídeos em rochas sedimentares e ígneas da bacia do Rio Corumbataí, estado de São Paulo, e, conseqüentemente, a taxa de exposição. Esta bacia possui uma grande área com cultura ...
Rn-222, Rn-220 and other dissolved gases in mineral waters of southeast Brazil
(Journal of Environmental Radioactivity, 2014-06-01) [Artigo]
This paper describes the natural radioactivity due to Rn-222 and Rn-220 in mineral waters occurring at Sao Paulo and Minas Gerais states, Brazil, that are extensively used for drinking in public places, bottling and bathing ...
Chemical weathering rate, denudation rate, and atmospheric and soil CO2 consumption of Parana flood basalts in Sao Paulo State, Brazil
(Geomorphology, 2015-03-15) [Artigo]
The chemical weathering rate and atmospheric/soil CO2 consumption of Parana flood basalts in the Preto Stream basin, Sao Paulo State, Brazil, were evaluated using major elements as natural tracers. Surface and rain water ...
Relics of eclogite facies assemblages in the Ceara Central Domain, NW Borborema Province, NE Brazil: Implications for the assembly of West Gondwana
(Gondwana Research, 2009-06-01) [Artigo]
The Borborema Province, in the NE of Brazil, is a rather complex piece in the Brazil-Africa puzzle as it represents the junction of the Dahomeyide/Pharusian, Central African, Aracuai and Brasilia fold belts located between ...
High-pressure granulites from Carire, Borborema Province, NE Brazil: Tectonic setting, metamorphic conditions and U-Pb, Lu-Hf and Sm-Nd geochronology
(Gondwana Research, 2012-11-01) [Artigo]
In the northwest region of the Ceara Central Domain, Borborema Province, an elongate area of mylonitic diorites and granodiorites is structurally controlled by NE-SW-trending strike-slip faults. Granitic material and layers ...
Gamma-ray spectrometry signature of main volcanic rocks of Serra Geral formation: preliminary results
(Geociências, 2014) [Artigo]
Ortognaisses peraluminosos associados ao grupo Araxá na região de Rochedo, Goiás
(Geociências, 2014) [Artigo]
In the Araxá Group metasediments in southern Goiás, there are occurences of numerous gnaissified granitic bodies. Two of these occurrences are located near Rochedo district, municipality of Piracanjuba. These two occurences ...
Hydrochemistry and weathering rates on Corumbatai River basin, São Paulo State, Brazil
(Journal of Hydrology, 2010-03-30) [Artigo]
This work was held at the Corumbatai River basin that is inserted within the giant Parana sedimentary basin (Paleozoic-Cenozoic) in South America. The Corumbatai River is the major river draining the area and its water is ...