Insights into the early Tibetan plateau from (U-Th)/He thermochronology
- Dai, J.
- Wang, C.
- Hourigan, J.
- Santosh, M.
DOIAbstract
The central Songpan–Ganzi belt, located on the eastern margin of the Tibetan Plateau, has a similar high elevation and low relief to parts of central Tibet. Thermochronological studies from the central Tibetan Plateau reveal a history of slow exhumation (rates <0.05 km Ma−1) since 45 Ma; however, the exhumation history of the central Songpan–Ganzi belt is unknown. To address this, we conducted an apatite and zircon (U–Th)/He thermochronology study of bedrock samples collected across the central Songpan–Ganzi belt and into central parts of the Tibetan Plateau. Zircon (U–Th)/He ages range from 54.2 ± 7.5 to 146.5 ± 10.0 Ma and the majority of apatite (U–Th)/He ages fall between 74.7 ± 19.0 and 35.7 ± 9.4 Ma. Thermal history models of these da...
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