Rift to post-rift evolution of a passive continental margin: the Ponta Grossa Arch, SE Brazil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Denudation history of the Bocaina Plateau, Serra do Mar, southeastern Brazil: Relationships to Gondwana breakup and passive margin development

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Problems related to the employment of thin uranium films as neutron dosimeters

Thin uranium films built on muscovite mica basis and obsidian samples having known ages were irradiated with thermal neutrons at the IPEN/CNEN reactor, São Paulo. Comparing thin film performance with the obsidian one, it was observed that the latter feel a greater neutron fluence. Nominal fluences at the used facility are in agreement with the results obtained analysing the obsidian samples. A probable hypothesis to explain this disagreement, namely, the uranium loss from the thin films, was ruled out. © 1995.

A tectônica meso-cenozóica de parte da borda nordeste da Bacia do Paraná: traços de fissão em apatita

The possible development of thermal events in the central portion of São Paulo state was described based on apatite fission track analysis. Using apatites of sedimentary rocks of the Paraná Basin, modeling the thermal history was made possible due to the homogeneity of the data. Every thermal history begins with a total annealing of fission tracks, related to the Serra Geral magmatism, evolving into a cooling period. In addition to cooling after the magmatism (Early Cretaceous) two other periods of cooling were also detected, registered in the Late Cretaceous/ Paleocene and Eocene, driven as much by uplift with tectonic denudation as by faulting. The nearest portion of the edge of the basin (external to the Dome of Pitanga), registered a period of warming over the Paleocene that can be attributed to the increase in the geothermal gradient. The periods of cooling have a regional and temporal relationship with the tectonic events that occurred in the southeastern Brazil and were described in the crystalline basement. The period of warming, registered in the Late Cretaceous/ Paleocene, has local occurrence and can be found only in the southern portion of the studied area.

Modelagem evolutiva do planalto Sul de Minas através de correlações entre análise morfométrica da rede de drenagem e termocronologia por traços de fissão em apatitas

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Uso da termocronologia por traços de fissão em apatita no reconhecimento de áreas de recarga e análises isotópicas de 234U/238U em águas subterrâneas do aquífero Itararé no município de Americana (SP)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estudo do annealing de traços de fissão em epídoto

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Contribuição ao conhecimento de processos atuantes no rifteamento continental, por traços de fissão em zircões e apatitas, aplicados no rift continental do sudeste do Brasil, bacias de Taubaté, Resende, Volta Redonda e circunvizinhanças

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caracterização dos ambientes deposicionais na bacia do Ribeirão Entupido, complexo alcalino do Passa Quatro, estado de São Paulo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Exumação tectônica e evolução associada do relevo no arco de Ponta Grossa, sul-sudeste do Brasil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Termocronologia e história denudacional da Serra do Mar e implicações no controle deposicional da Bacia de Santos

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Evolução termocronológica por traços de fissão em apatita e zircão das Bacias da Transição Proterozóico-Fanerozóico de Camaquã (RS), Castro (PR), Eleutério (SP/MG), Jaibaras e Cococi (CE)

Pós-graduação em Geologia Regional - IGCE

Morfotectônica da região centro-leste do Estado de São Paulo e áreas adjacentes de Minas Gerais: termocronologia e paleotensões

Pós-graduação em Geologia Regional - IGCE

Long-term landscape evolution and post-rift reactivation in the southeastern Brazilian passive continental margin: Taubat, basin

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Evolução da tectônica rúptil no nordeste do Brasil baseada na termocronologia por traço de fissão em apatita

Results of apatite fission tracks from twelve samples collected across a Borborema Province transect, northeastern Brazil, revealed two major paleothermal events: a cooling event occurred between Albian and late Cenomanian (110 - 80 Ma) and a second cooling event starting on early Paleocene (66 Ma). Given the wide expression of the studied area (sampling trend along four brazilian states) a correlation between the distribution of fission track data and the current geological / geomorphological scenario was made possible, considering the area’s tectono - stratigraphic past and its thermochronologic evolution until now. The fact that the employed thermochronologic tool relates to a relatively shallow geothermometer, substancially information for understanding the behavior of basement brittle tectonic was achieved. These data were used to analyze faults origin and reactivation, associated with sedimentary basins evolution in the context of South America - Africa continental breakup.