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- W4322001213 abstract "The interactions between Earth surface processes, climate and tectonics determine the landscape in mountain regions. The Japanese Alps uplifted throughout the Quaternary and now reach elevations of up to 3,000 m. However, quantifying relief changes in response to tectonic activity, magmatism and Late Quaternary glaciation is challenging due to the young age of the Japanese Alps and the difficulty of measuring surface processes at the timescale of glacial-interglacial cycles. Here, we use ultra-low temperature thermochronometers based on the luminescence of feldspar minerals and the electron spin resonance (ESR) of quartz minerals, in combination with inverse modelling to derive rock cooling rates and exhumation rates histories at 104-106 years timescales. We focus on the Tateyama region in the Hida range of the Japanese Alps, which was glaciated during the late Quaternary period. In total, 19 new samples were analyzed by luminescence and ESR thermochronometry. While most luminescence signals have already reached their upper dating limit, ESR signals (Al and Ti centres) yielded ESR ages of between 0.5-0.9 Ma. In general, thermal stability is lower for the Al centre compared to that of the Ti centre, but both centres constrain similar exhumation rates. Inversions reveal rock cooling rates on the order of 30-80 °C/Ma, which can be inverted to erosion rates of <1 mm/a within the past 1 Ma. In the next step, we will relate these rates to the climate and tectonic history of the Tateyama region." @default.
- W4322001213 created "2023-02-26" @default.
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- W4322001213 date "2023-05-15" @default.
- W4322001213 modified "2023-09-29" @default.
- W4322001213 title "High-relief exhumation history in the Japanese Alps within the past 1 Ma inferred from trapped charge thermochronometry" @default.
- W4322001213 doi "https://doi.org/10.5194/egusphere-egu23-11600" @default.
- W4322001213 hasPublicationYear "2023" @default.
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