Results 131 to 140 of about 397 (177)

Fission track analysis of some Brazilian apatites

Radiation Measurements, 1995
Abstract Apatites originated from three Brazilian regions (craton of Sao Francisco, region situated between the craton of Sao Francisco and Parana basin and oriental border of the Parana basin) were studied using the fission track method. Thermal histories were obtained applying to our experimental data the theoretical model named “Apatite Fission ...
G. Amaral, H. Born, J.C. Hadler, P.J. Iunes, K. Kawashita, D.L. Machado, E.P. Oliveira, S.R. Paulo, C.A. Tello   +8 more
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Apatite Fission-Track Analysis

Reviews in Mineralogy and Geochemistry, 2005
Apatite fission-track (AFT) analysis has been widely used during the past 30+ years to constrain the low-temperature thermal histories of many igneous, metamorphic and sedimentary rocks in a wide range of geological settings. Applicable geological settings include orogenic belts, rifted margins, faults, sedimentary basins, cratons, and mineral deposits.
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A quantitative description of fission-track etching in apatite

American Mineralogist, 2021
Abstract We measured the apatite etch rate νR in 5.5 M HNO3 at 21 °C as a function of orientation. Results for Durango apatite evidence that νR varies by a factor >5 with angle to the c-axis. Our measurements also provided track etch rates νT and surface etch rates νS.
Carolin Aslanian, Raymond Jonckheere, Bastian Wauschkuhn, Lothar Ratschbacher   +3 more
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Simulations of fission track distributions in apatite

International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements, 1986
Abstract Monte Carlo simulations have been made of the revelation of fission tracks through the cleavage plane of a crystal. The distributions of quantities that are normally measured (length, P, and angle, φ, projected onto the cleavage plane and depth, Z, projected normally to the plane) have been calculated.
I.J.M. Al-Khalifa, J.V. Major
openaire   +1 more source

Isothermal plateau method for apatite fission-track dating

Nuclear Tracks, 1981
Abstract The stability of the latent tracks in apatites (French Brittany) is investigated during the isothermal annealing process. The kinetics of the track annealing lead us to propose a combination of exponential decay functions for mathematically depicting the track-annealing phenomenon. This result is in good agreement with a recent theory on the
Didier Chaillou, Alain Chambaudet
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Fission track dating of apatites

Earth and Planetary Science Letters, 1968
Abstract Fission track dating was applied to a large number of apatites for the first time. In apatite it is easy to identify fission tracks on the (0001) face if one uses the oil immersion technique. Fission tracks in apatite survive 1 m.y. only if the temperature does not exceed 100°C. Apatites taken from different types of rocks from the Odenwald (
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Thermal annealing of unetched fission tracks in apatite

Earth and Planetary Science Letters, 2012
Abstract Tracks created by fission events in ceramics are randomly-oriented, linear radiation-damage regions about 10 to 25 μm in length but only several nm in diameter. In the absence of a method to observe the entire length of a latent, unetched track, the details of the structure and the process of the thermal-annealing of tracks have remained ...
Weixing Li, Maik Lang, Andrew J.W. Gleadow, Maxim V. Zdorovets, Rodney C. Ewing   +4 more
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The relationship between fission track length and track density in apatite

Nuclear Tracks and Radiation Measurements (1982), 1984
Abstract Fission track dating is based upon an age equation derived from a random line segment model for fission tracks. This equation contains the implicit assumption of a proportional relationship between the true mean length of fission tracks and their track density in an isotropic medium.
G.M. Laslett, A.J.W. Gleadow, I.R. Duddy
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Advantages and challenges of automated apatite fission track counting

Chemical Geology, 2012
Abstract Fission track thermochronometry data are often a core element of modern tectonic and denudation studies. Soon after the development of the fission track method, interest emerged for the development of automated counting procedures to replace the time consuming labor of counting fission tracks under the microscope.
Enkelmann, Eva, Ehlers, Todd, Buck, Gerald, Schatz, Ann-Kathrin   +3 more
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Evidence for unetchable gaps in apatite fission tracks

Chemical Geology, 1995
Abstract The apparent shape of etched confined fission tracks in apatite depends on their crystallographic orientation, on the direction of observation and on the distribution of longitudinal etching velocities along the track. Overetched blade-like tracks, which are approximately perpendicular to the c-axis, sometimes exhibit an extremely ...
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