Author(s): Oliveira, Sandro Guedes de, 1973- ; Lixandrão Filho, Arnaldo Luis, 1983- ; Hadler Neto, Julio Cesar, 1947-
Date: 2022
Persistent ID: https://hdl.handle.net/20.500.12733/2968
Origin: Oasisbr
Subject(s): Traços de fissão; Fission track; Arrhenius; Fission-track thermochronology; Annealing model; Artigo original
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 by the interaction with fission fragments during the geological thermal history of a mineral sample. Arrhenius type equations have been successfully applied to model annealing and are at the core of thermal history (temperature, T, as a function of time, t, paths) reconstruction programs for fission-track thermochronology. In this work, the Arrhenius equations are generalized and synthesized in a composite equation that allows for the generation of Arrhenius-type equations by turning on/off parameters and by appropriately choosing functions of ln t and T-1. Geometrical features of the Arrhenius-type equations in the Arrhenius pseudo-space (T-1, ln t) are explored. Three examples of new models for annealing of fission tracks in apatite, obtained from the composite model, are presented, and their extrapolation to the geological timescale is discussed. The presented composite model can be applied to other studies involving annealing experiments, such as the annealing of alpha recoil damage in minerals
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
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