Porovnat metody
Prohlédněte si vybrané metody vedle sebe; řádky, které se liší, jsou zvýrazněny.
| Datování uranem a thoriem× | Datování pomocí elektronové paramagnetické rezonance× | |
|---|---|---|
| Obor | Archeologie | Archeologie |
| Rodina | Process / pipeline | Process / pipeline |
| Rok vzniku≠ | 1955 | 1980s |
| Tvůrce≠ | Harmon Craig | Michael Aitken |
| Typ≠ | Decay series dating technique | Paramagnetic resonance dating technique |
| Původní zdroj≠ | 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 ↗ | Grün, R. (1989). Electron spin resonance (ESR) dating. Quaternary International, 1, 65-109. DOI ↗ |
| Další názvy≠ | U-Th dating, thorium-230 dating | ESR dating, electron paramagnetic resonance dating, EPR dating |
| Příbuzné | 4 | 4 |
| Shrnutí≠ | 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. | Electron spin resonance (ESR) dating is a chronometric method that determines the age of bones, teeth, mollusk shells, and sediments by measuring accumulated radiation-induced unpaired electrons. Developed by Michael Aitken in the 1980s, ESR detects free radicals trapped in mineral crystal structures. Unlike luminescence techniques that require heating or light exposure, ESR directly measures paramagnetic defects, making it particularly valuable for dating dental and skeletal remains that are inaccessible to other methods. |
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