A novel mean-value-based approach for correcting radiocarbon age anomalies in terrestrial gastropods: Insights from the Tibetan Plateau

IF 3.2 1区 地球科学 Q1 GEOGRAPHY, PHYSICAL Quaternary Science Reviews Pub Date : 2025-03-13 DOI:10.1016/j.quascirev.2025.109284
Yan Hu , Weijian Zhou , Peng Cheng , Jibao Dong , Yuda Chui , Jie Zhou , Wenli Li , Haiyan Zhao , Mengyu Zang , Minwen Lan , Huachun Gu , Xuefeng Lu
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Abstract

Terrestrial gastropod shells are abundant in loess deposits and represent a promising alternative material for radiocarbon dating. However, accurately correcting radiocarbon age anomalies caused by the limestone effect in shells remains a critical challenge. In this study, we report new radiocarbon ages of gastropod shells and charcoals from two loess sequences on the Tibetan Plateau. Cathaica rossimontana exhibits a mean offset of 1788 ± 240 years, while Vollonia tenera shows an average age anomaly of 997 ± 227 years. By integrating stratigraphic and modern surveys, we demonstrate that the same species gastropods under stable environments exhibit a concentrated limestone effect with a low coefficient of variation (0.10–0.22). Based on this theoretical foundation, we propose a novel correction method for age anomalies using linear regression modeling and average limestone effect. The corrected radiocarbon ages of gastropod shells show excellent agreement with reliable charcoal ages in the BST and GG loess sections, validating the reliability and robustness of the proposed method. Compared to conventional modern-value correction approach, the mean - value correction method offers significant advantages, including broader applicability and greater reliability. These findings advance the potential of gastropod shells as reliable chronological markers in Quaternary loess research.
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来源期刊
Quaternary Science Reviews
Quaternary Science Reviews 地学-地球科学综合
CiteScore
7.50
自引率
15.00%
发文量
388
审稿时长
3 months
期刊介绍: Quaternary Science Reviews caters for all aspects of Quaternary science, and includes, for example, geology, geomorphology, geography, archaeology, soil science, palaeobotany, palaeontology, palaeoclimatology and the full range of applicable dating methods. The dividing line between what constitutes the review paper and one which contains new original data is not easy to establish, so QSR also publishes papers with new data especially if these perform a review function. All the Quaternary sciences are changing rapidly and subject to re-evaluation as the pace of discovery quickens; thus the diverse but comprehensive role of Quaternary Science Reviews keeps readers abreast of the wider issues relating to new developments in the field.
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