Now showing items 1-10 of 275
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 ...
Magnetometric exploration in intrusive basic with evidence of gold in northern region of the Camaquã Sedimentary Basin (RS)
(REM. Revista Escola de Minas, 2015) [Artigo]
This study involved magnetometric exploration in the region of São Sepé (RS), southern Brazil, to evaluate the potential for gold mineralization in a gabbro using evidence previously obtained from the geochemical exploration ...
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, ...
Isotopic characterization of the metabasites and amphibolites of the Acungui and Setuva Groups of the Ribeira Belt
(Geologia USP: Serie Cientifica, 2002-12-01) [Artigo]
Pb, Rb, Sr, Sm and Nd isotope analyses were carried out on amphibolitic rocks from Campo Largo (PR), Rio Branco do Sul (PR) and Adrianópolis (PR) and for the metabasite from Adrianópolis and Apiai (SP), all belonging to ...
The U-isotopes modeling in aquifers from Pocos de Caldas plateau, Brazil
(Environmental Geology, 2005-08-01) [Artigo]
U-modeled groundwater residence times were estimated by changes in U-234/U-238 activity ratio (AR) and U content of groundwaters from Pocos de Caldas city situated at the Pocos de Caldas alkaline massif, Brazil. The estimated ...
Evolution of the Central Ribeira Belt, Brazil: Implications for the Assembly of West Gondwana
(Gondwana Research, 2001-12-01) [Artigo]
Platinum-Group Minerals in Chromitites of the Niquelandia Layered Intrusion (Central Goias, Brazil): Their Magmatic Origin and Low-Temperature Reworking during Serpentinization and Lateritic Weathering
(Minerals, 2012-12-01) [Artigo]
A variety of platinum-group-minerals (PGM) have been found to occur associated with the chromitite and dunite layers in the Niquelandia igneous complex. Two genetically distinct populations of PGM have been identified ...
Geochemistry of the Guaxupe Granulites, Minas Gerais, Brazil
(Gondwana Research, 1998-10-01) [Artigo]
Geochemical data for granulite terrain are presented from the northernmost portion of the Guaxupe Massif, at Mantiqueira Province, SE Brazil. Several types of granulites are recognized in the area: basic, intermediate and ...
Uranium speciation in groundwaters from Parana basin, Brazil
(Geochemistry of the Earth's Surface, 1999-01-01) [Trabalho apresentado em evento]
This paper describes the results of a regional study involving the sampling of 60 pumped tubular wells drilled at the Parana sedimentary basin, Brazil, which was carried out with the purpose of evaluating the U speciation ...
Vertical displacement during late-collisional escape tectonics (Brasiliano Orogeny) in the Ribeira Belt, São Paulo State, Brazil
(Journal of African Earth Sciences, 1999-07-01) [Artigo]
During the Brasiliano-Pan-African Orogeny, West Gondwana formed by collisional processes around the Sao Francisco-Congo Craton. The Ribeira belt, in southeastern Brazil, resulted from northwestward collision (650-600 Ma), ...