ESR dating of barite taking into account the contribution from extinct <sup>228</sup> Ra to the equivalent doses
The conventional ESR ages of two barite samples, in which <sup>228</sup>Ra was not detected, were 973 and 357 years. After correction for the possible contribution of extinct <sup>228</sup>Ra and its daughters, the age differences were only about 2 years. This indicates that the contribution of <sup>228</sup>Ra is negligible in practice unless the initial <sup>228</sup>Ra/<sup>226</sup>Ra ratio in particularly high. However, it is still necessary to investigate further if the fluid ratio may vary spatially or temporally.
Authors
- Tatsuo Nozaki
- Shin Toyoda
- Miyu Kakumoto
- Jun-Ichiro Ishibashi
Institutions
- Okayama University of Science (JP)
- Waseda University (JP)
- Kobe University (JP)
- The University of Tokyo (JP)
Publication Details
- Journal
- International Journal of Radiation Biology
- Published
- 2026-03-03
- DOI
- https://doi.org/10.1080/09553002.2026.2629234
- Primary Topic
- Geomagnetism and Paleomagnetism Studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00