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We found that a distinct change in slope of the peak age and lag time of the detrital apatite fission track occurred at ∼14 Ma, which we interpret as a provenance change caused by the uplift of the western end of the Danghe Nan Shan.Combined with previous studies in adjacent areas, this work implies that the initiation of successive episodes of surface uplift in the northeastern margin of the Tibetan Plateau took place in the mid-Miocene.Uranium is present as a trace element in many of the minor rock-forming minerals, e.g., apatite (calcium phosphate), zircon (zirconium silicate), and titanate (calcium titanium silicate), as well as volcanic glass.The Subei Basin is located at the intersection of the northeastern end of the Altyn Tagh Fault (ATF) and the western end of the Danghe Nan Shan in the northeastern Tibetan Plateau.The Thermochronology group conducts research across all aspects of the development of laboratory techniques, as well as their application to understanding the low-temperature history of the continental crust.

The tracks were generated by irradiating the apatite samples with 2.3 Ge V Bi ions, which have a comparable rate of energy loss to fission tracks in this mineral.

This is why zircon geochronology and thermochronology is a particularly useful approach to detrital studies.

In cases where different sources are characterized by the same zircon U-Pb ages, differential metamorphism and/or exhumation may produce distinctive thermochronological ages.

This interaction disrupts the crystal structure creating a single linear damage trail at the atomic scale.

The trails cannot be observed optically, but because they are very reactive, they can be enlarged with chemical etchants to become visible under an optical microscope.




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