Journal article

Authors list: Li, Bo; Jacobs, Zenobia; Sontag-Gonzalez, Mariana; 'Gorman, Kieran; Roberts, Richard G.

Publication year: 2024

Journal: Quaternary Geochronology: The International Research and Review Journal on Advances in Quaternary Dating Techniques

Volume number: 81

ISSN: 1871-1014

eISSN: 1878-0350

Open access status: Hybrid

DOI Link: https://doi.org/10.1016/j.quageo.2024.101515

Publisher: Elsevier

Abstract: 
The distribution of equivalent dose (De) values of individual feldspar grains is affected by a range of variables, including internal and external dose rates, residual doses, and uncertainties associated with luminescence behaviours and measurement errors. The distributions of these variables may be non-Gaussian, resulting in a complex De distribution pattern that may be challenging to interpret and analyse using conventional statistical models. To address this problem, we present an empirical Bayesian hierarchical age model for feldspar (BHAMF), which integrates all key components involved in the optical dating of individual feldspar grains. The model is based on application of the standardised growth curve and LnTn methods to obtain a full distribution of singlegrain De values, and use of prior information about major sources of uncertainty that can be obtained experimentally or theoretically. A Bayesian outlier model is also adopted to detect and deal with outliers. We test and validate the BHAM-F using an experimentally gathered dataset obtained from a sediment sample and various simulated datasets. Our results show that the BHAM-F provides a robust and flexible way to hierarchically deal with data obtained in single-grain optical dating of feldspars.

Harvard Citation style: Li, B., Jacobs, Z., Sontag-Gonzalez, M., 'Gorman, K. and Roberts, R. (2024) A Bayesian hierarchical age model for single-grain optical dating of feldspars, Quaternary Geochronology: The International Research and Review Journal on Advances in Quaternary Dating Techniques, 81, Article 101515. https://doi.org/10.1016/j.quageo.2024.101515

APA Citation style: Li, B., Jacobs, Z., Sontag-Gonzalez, M., 'Gorman, K., & Roberts, R. (2024). A Bayesian hierarchical age model for single-grain optical dating of feldspars. Quaternary Geochronology: The International Research and Review Journal on Advances in Quaternary Dating Techniques. 81, Article 101515. https://doi.org/10.1016/j.quageo.2024.101515