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| ウラン・トリウム年代測定法× | 光励起ルミネッセンス年代測定法× | |
|---|---|---|
| 分野 | 考古学 | 考古学 |
| 系統 | Process / pipeline | Process / pipeline |
| 提唱年≠ | 1955 | 1985 |
| 提唱者≠ | Harmon Craig | David Huntley |
| 種類≠ | Decay series dating technique | Luminescence dating technique |
| 原典≠ | Edwards, R. L., Chen, J. H., & Wasserburg, G. J. (1987). U-238, U-234 and Th-230 in seawater. Geochimica et Cosmochimica Acta, 51(5), 1213-1225. link ↗ | Huntley, D. J., Godfrey-Smith, D. I., & Thewalt, M. L. (1985). Thermoluminescence dating of ocean sediments. Canadian Journal of Earth Sciences, 22(3), 423-427. link ↗ |
| 別名 | U-Th dating, thorium-230 dating | OSL dating, optical dating |
| 関連 | 4 | 4 |
| 概要≠ | Uranium-thorium (U-Th) dating is a chronometric method that determines the age of carbonates, shells, bones, and coral by measuring the ratio of uranium isotopes to thorium-230. First applied by Harmon Craig in the 1950s, it exploits the natural radioactive decay chain of uranium. U-Th dating is particularly valuable for dating materials from 500 to 500,000 years old, filling a crucial chronological gap between radiocarbon and potassium-argon dating. | Optically stimulated luminescence (OSL) dating is a chronometric method that determines the age of sedimentary materials by measuring light-induced electron release from mineral grains. Developed by David Huntley and colleagues in the 1980s, it measures the time elapsed since sediment was last exposed to sunlight. This technique is widely used in archaeology, geology, and paleoenvironmental studies to date deposits ranging from a few decades to several hundred thousand years old. |
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