The Parameters That Govern the Accuracy of Fission-Track Age Determinations: A Re-Appraisal

haute, Peter Van den; Corte, F. De; Jonckheere, Raymond; Bellemans, F.

doi:10.1007/978-94-015-9133-1_3

Cited by 16 publications

(11 citation statements)

References 21 publications

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“…Thus, even ages determined with lower closure temperature methods (as the case of the fission-track thermochrology or (U-Th)/He) must give the same results of the methods that have higher closure temperature. Our values for Durango apatite also agree with those obtained by Van den haute et al [13] and Jonckheere [7] with the fission-track /-method (Au and Co monitors).…”

Section: Age Determinationsupporting

confidence: 91%

“…Ages of Durango samples obtained using the /-method (Au and Co dosimeters) in a well-thermalized nuclear reactor [7,8,13] are in agreement with the ones obtained through U-doped glass monitors (calibrated against uranium thin films). These fission-track ages are also in agreement when determined using the not-so-well thermalized neutron flux (Cd ratio for Au around 6) of the IPEN-CNEN nuclear reactor of São Paulo.…”

Section: Resultsmentioning

confidence: 97%

“…In this case, the neutron fluence is determined through metal monitor as Au and Co [7,[13][14][15]. For thermal energies (neutron energy less than 0.5 eV) their cross section curves are represented by 1/v relationship, where v is the speed of neutrons.…”

Section: Introductionmentioning

confidence: 99%

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Recalibration of U-doped standard glasses through uranium thin film for neutron-fluence measurements

Soares

Guedes

Curvo

et al. 2014

J Radioanal Nucl Chem

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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 Paranaíba) and standard Durango apatite. Samples were irradiated in two nuclear reactors with different characteristics and the results were compared. For well-thermalized neutron facility, metal activation monitor was also used. The ages of Alto Paranaíba arch and Durango apatite agree with those determined by other radiometric dating methods and metal activation monitors. These results suggest that the presented recalibration is suitable to be used routinely for fission-track dating studies even in a non-well thermalized neutron facility.

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Section: Age Determinationsupporting

confidence: 91%

Section: Resultsmentioning

confidence: 97%

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Recalibration of U-doped standard glasses through uranium thin film for neutron-fluence measurements

Soares

Guedes

Curvo

et al. 2014

J Radioanal Nucl Chem

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“…Earlier studies (Bellemans, 1996;Bigazzi et al, 1990;Curvo et al, 2013;De Corte et al, 1991, 1995Jonckheere, 1995;Van den haute et al, 1988Van den haute et al, , 1998 give reason for trusting that the calculated neutron fluences are accurate. The agreement of the uranium concentrations calculated with Eq.…”

Section: Apparent Fission-track Agementioning

confidence: 99%

“…Our contribution sets out from the premise that neutron-fluence measurements using the recommended metal monitors (Au, Co) and wellthermalized irradiation facilities are no longer an issue (Bigazzi et al, 1990;Curvo et al, 2013;De Corte et al, 1991, 1995Van den haute et al, 1988Van den haute et al, , 1998. Our second assumption is that the matter of the fission constant has been settled following recent redeterminations (Eikenberg et al, 1993;Guedes et al, 2000Guedes et al, , 2003Suzuki, 2005;Yoshioka et al, 2005) and reassessments (Holden, 1989;Holden and Hoffman, 2000).…”

Section: Introduction: Premisesmentioning

confidence: 99%

Standardless fission-track dating of the Durango apatite age standard

2015

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Five dating strategies were used for determining the standardless fission-track age of the Durango apatite. These use the same fossil-track densities but differ in the manner in which the induced-track densities are determined. A conventional age calculation, without correction for experimental factors, gives inconsistent ages with methodrelated differences N 15%. Correcting for these factors brings the ages in line with each other and with the reference age but leaves no room for a partial-annealing correction based on the confined-track lengths. Three further reasons suggest that a length correction is not appropriate. (1) The evidence for lengthbased corrections is inconclusive. (2) The plateau age of the Durango apatite is consistent with its apparent fission-track age to within 1%. (3) The calculated effective etchable length of the fossil tracks agrees within error with that of the induced tracks; both are further consistent with the measured mean length of confined induced tracks. The circumstance that the (U,Th)/He ages of the accepted and proposed apatite age standards are consistent with their reference ages leaves no margin for a lowered fission-track age resulting from partial annealing, although the case of the Durango apatite itself is inconclusive because of its exceptional crystal size. It is conjectured that the shortening of the fossil tacks in the Durango apatite is due to a lowering of the track etch rate over time. In this case, annealing equations fitted to induced-track data underestimate the extent of confined-track-length reduction in geological samples.

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An Historical Perspective on Fission-Track Thermochronology

Hurford

2018

Fission-Track Thermochronology and Its Application to Geology

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The Parameters That Govern the Accuracy of Fission-Track Age Determinations: A Re-Appraisal

Cited by 16 publications

References 21 publications

Recalibration of U-doped standard glasses through uranium thin film for neutron-fluence measurements

Recalibration of U-doped standard glasses through uranium thin film for neutron-fluence measurements

Standardless fission-track dating of the Durango apatite age standard

An Historical Perspective on Fission-Track Thermochronology

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