Extrapolation of zircon fission-track annealing models


Autoria(s): Palissari, R.; Guedes, S.; Curvo, E. A C; Moreira, P. A F P; Tello, C. A.; Hadler, J. C.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

27/05/2014

27/05/2014

01/03/2013

Resumo

One of the purposes of this study is to give further constraints on the temperature range of the zircon partial annealing zone over a geological time scale using data from borehole zircon samples, which have experienced stable temperatures for ∼1 Ma. In this way, the extrapolation problem is explicitly addressed by fitting the zircon annealing models with geological timescale data. Several empirical model formulations have been proposed to perform these calibrations and have been compared in this work. The basic form proposed for annealing models is the Arrhenius-type model. There are other annealing models, that are based on the same general formulation. These empirical model equations have been preferred due to the great number of phenomena from track formation to chemical etching that are not well understood. However, there are two other models, which try to establish a direct correlation between their parameters and the related phenomena. To compare the response of the different annealing models, thermal indexes, such as closure temperature, total annealing temperature and the partial annealing zone, have been calculated and compared with field evidence. After comparing the different models, it was concluded that the fanning curvilinear models yield the best agreement between predicted index temperatures and field evidence. © 2012 Elsevier Ltd. All rights reserved.

Formato

192-196

Identificador

http://dx.doi.org/10.1016/j.radmeas.2012.06.004

Radiation Measurements, v. 50, p. 192-196.

1350-4487

http://hdl.handle.net/11449/74686

10.1016/j.radmeas.2012.06.004

WOS:000319893000038

2-s2.0-84877690391

Idioma(s)

eng

Relação

Radiation Measurements

Direitos

closedAccess

Palavras-Chave #Annealing model #Field evidence #Fission tracks #Geological extrapolation #Zircon #Annealing temperatures #Chemical etching #Closure temperatures #Curvilinear model #Fission track #Partial annealing #Temperature range #Extrapolation #Fission reactions #Annealing
Tipo

info:eu-repo/semantics/article