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Fission track thermochronology is a low-temperature geochronological method and a
well-established and powerful tool to constrain the thermal evolution of the upper
crust. Thus, the method enables to constrain the latest stage of mountain building in
the Pamirs. It allows the reconstruction of the onset and rate of cooling. Assuming that
the geothermal gradient is known, cooling rates can be transformed into denudation
rates which in turn can be related to tectonic activity.
4.2 Results
Fission track dating
The sample locations and the list of fission track samples are summarised in Fig. 4.1
and Appendix C, Tab. C1. Zircon and apatite fission track ages were determined on 25
samples. The analytical data of apatites and zircons are listed in Appendix C, Tab. C4
and C6, respectively. The data for apatites are illustrated in Appendix C, Fig. C1, those
of zircons are shown in Appendix C, Fig. C3. The regional distribution of the fission
track ages is shown in Fig. 4.2-4.5. The results of the decomposed fission track ages of
sediment samples are listed in Appendix C, Tab. C7 and Fig. C4.