Definition fission track dating

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By analyzing the number and nature of these tracks in a sample mineral and inducing further fission of the remaining uranium by irradiation with neutrons to create new tracks for comparison, one can estimate the approximate age of the sample.Thermochronology is the study of the thermal evolution of a region of a planet.We have a new significant attempt to apply the fission track method to the hydrothermal mineralization.Since annealing of fission tracks occurs in crystal lattice and FT stability is hardly affected by other factors except temperature, the FT thermochronology is quite suitable for recording thermal events that take place in open system or enclosed system, in which the ore deposit formed.Thermochronologists use radiometric dating along with the closure temperatures that represent the temperature of the mineral being studied at the time given by the date recorded, to understand the thermal history of a specific rock, mineral, or geologic unit.

Now this method has been widely used in crustal denudation research, near-surface substance dating and low-temperature geothermal history [10, 11, 12].Here we expected this could give a reference for other scholars or inspire them.Evidence for determination of geological age of apatite was supplied by the thermal analysis method.Etching duration was about 20–35 h with Na OH/KOH(=1: 1) eutectic etchant at 210°C.Apatite was mounted in epoxy resin on glass slides and polished to expose internal grain surface.

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