14 documents found, page 1 of 2
Generalization of the fission-track Arrhenius annealing equations
Oliveira, Sandro Guedes de, 1973-; Lixandrão Filho, Arnaldo Luis, 1983-; Hadler Neto, Julio Cesar, 1947-Agradecimentos: This work has been funded by the National Council for Scientific and Technological Development (Brazil) grant 308192/2019-2. The authors are grateful to Prof. Roussos Dimitrakopoulos and an anonymous reviewer for their comments and criticisms that helped improve the quality of this paper; Abstract: Fission-track annealing models describe the recovery kinetics of a crystalline structure damaged b...
Novel etching protocol for epidote fission tracks
Nakasuga, Wagner Massayuki, 1985-; Hadler Neto, Julio Cesar, 1947-; Oliveira, Sandro Guedes de, 1973-Agradecimentos: We are grateful to São Paulo Research Foundation (FAPESP) by financial support through grant: 2010/20496–2 and Coordination for the Improvement of Higher Education Personnel (CAPES). We are also grateful to researchers who provided us with epidote samples: Prof. Maria Helena Bezerra Maia de Hollanda, MSc. Victor Lipas Salas and MSc. Pedro Figueroa. At last, we are grateful for the reviewers' adv...
Apatite fission-track analysis of Cretaceous alkaline rocks of Ponta Grossa and...
Oliveira, Sandro Guedes de, 1973-; Hadler Neto, Julio Cesar, 1947-; Passarella, Samia, 1984-Agradecimentos: The PhD research by C.J. Soares wasfinancially supportedby Conselho Nacional de Desenvolvimento Científico eTecnológico (CNPq) and São Paulo Research Foundation(FAPESP), process number: 2011/21296-0; 2013/50854-6.We thank Christina Trautmann for the heavy ions irradiation; Abstract: This work presentsfission-track ages and thermal history modelling of apatite samples from two Brazilian alkaline ...
Novel calibration for LA-ICP-MS-based fission-track thermochronology
Oliveira, Sandro Guedes de, 1973-; Hadler Neto, Julio Cesar, 1947-; Iunes, Pedro José, 1963-Abstract: We present a novel age-equation calibration for fission-track age determinations by laser ablation inductively coupled plasma mass spectrometry. This new calibration incorporates the efficiency factor of an internal surface, [eta q](is), which is obtained by measuring the projected fission-track length, allowing the determination of FT ages directly using the recommended spontaneous fission decay cons...
Recalibration of U-doped standard glasses through uranium thin film for neutron...
Soares, Carlos José; Oliveira, Sandro Guedes de, 1973-; Hadler Neto, Julio Cesar, 1947-; Lixandrão Filho, Arnaldo Luis, 1983-Abstract: This work presents a recalibration of U-doped standard glasses using natural uranium thin films to be used as most dedicated neutron monitor for fission-track dating. The recalibrated U-doped glasses were used to determine fission-track ages in apatite samples from Brazilian alkaline formations (Alto Paranaiba) and standard Durango apatite. Samples were irradiated in two nuclear reactors with differen...
Further investigation of the initial fission-track length and geometry factor i...
Soares, Cleber José, 1984-; Oliveira, Sandro Guedes de, 1973-; Lixandrão Filho, Arnaldo Luis, 1983-; Vellame, Igor Alencar, 1984-Agradecimentos: We thank Richard Ketcham and Jocelyn Barbarand for their constructive comments that helped improve the manuscript. This work is part of C.J. Soares's Ph.D. research and was financially supported by Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP, Brazil) and Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq, Brazil); Abstract: The external detector method (EDM) is ...
Improved zircon fission-track annealing model based on reevaluation of annealin...
Oliveira, Sandro Guedes de, 1973-; Moreira, Pedro Augusto Franco Pinheiro, 1979-; Hadler Neto, Julio Cesar, 1947-Agradecimentos: S. G. has been financed by Conselho Nacional de Desenvolvimento Científico e Tecnológico(process number 473888/2007-6). P. A. F. P. M. acknowledges Fundação de Amparo a Pesquisa de São Paulo (process number 2007/08393-0) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (process number 200016/2008-3) for financial support. R. D. was supported by the Materials Sciences and Enginee...
Projected length annealing of etched Sm-152 ion tracks in apatite
Vellame, Igor Alencar, 1984-; Oliveira, Sandro Guedes de, 1973-; Soares, Cleber José, 1984-; Moreira, Pedro Augusto Franco Pinheiro, 1979-Agradecimentos: This work is part of Alencar's PhD research and is financially supported by Brazilian foundation CNPq (grants #141705/2008-6 and #201847/2009-4). The study of projected length annealing of ion tracks was an idea from Dr PJ Iunes (in memoriam). Critical comments from an anonymous reviewer are also acknowledged; Abstract: Slices of apatite (cut similar to 45 degrees apart from c-axis) were irradia...
Effects of etching on zircon grains and its implications for the fission track ...
Vellame, Igor Alencar, 1984-; Oliveira, Sandro Guedes de, 1973-; Palissari, Rosane, 1962-; Hadler Neto, Julio Cesar, 1947-Agradecimentos: The authors are grateful to Professor Giulio Bigazzi and Professor John Garver for providing several sheets of teflon PFA and to an unknown referee for his very helpful comments. We also are grateful to Brazilian foundations FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo), CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior), and CNPq (Conselho Nacional de Desenvolvi...
Comparison of population and external detector method dating in epidote
Curvo, Eduardo Augusto Campos, 1979-; Iunes, Pedro José, 1963-; Palissari, Rosane, 1962-; Hadler Neto, Julio Cesar, 1947-Agradecimentos: We are grateful to Professor Peter Hackspacher and to Daniel Godoy, from UNESP - Rio Claro, by the geological support concerning to this work and to State of São Paulo Research Foundation (FAPESP) which supported this work through a Doctoral Grant (E.A.C.C.), Process 02/13258-1, and a Thematic Project, Process 00/03960-5. We are also indebted to the unknown referee for valuable comments that imp...