کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6430812 | 1634829 | 2011 | 11 صفحه PDF | دانلود رایگان |

Detrital low temperature thermochronometric data provides spatial and temporal information on catchment erosion, which is relevant to problems in climate, tectonics and geomorphology. However, direct inference of erosion rates from such data is not trivial and only the simplest inverse problems have been addressed previously. In this paper, we present a new approach that relies on the Bayesian interpretation of probability and uses a Markov chain Monte Carlo algorithm for inversion, which affords flexibility in the choice of specific model parametrization and transparent assessment of model uncertainty. We demonstrate how a single detrital sample sourced from a high relief catchment can constrain long-term (>Â 106Â years) changes in erosion rate that are in good agreement with published bedrock age-elevation profiles. Furthermore, we use detrital data to jointly invert for long-term exhumation history and spatial variability in short-term (<Â 103Â years) sediment supply, information relevant to many geomorphic studies. Where cooling histories are simple, we show that even small sample sizes (<Â 20Â grains) reliably estimate long-term rates of exhumation. We suggest that the presented approach to modeling detrital low-temperature thermochronometric data is both a powerful and efficient tool for solving tectonic and geomorphic problems.
Research highlights⺠We present an approach to estimating erosion models from detrital thermochronometry. ⺠This approach allows inference of patterns of erosion and exhumation histories. ⺠Stochastic modeling permits estimation of uncertainty in results. ⺠Small samples are shown to be sufficient for simple erosion models. ⺠The approach can be used with thermokinematic and geomorphic models.
Journal: Earth and Planetary Science Letters - Volume 305, Issues 3â4, 15 May 2011, Pages 385-395