विधियों की तुलना करें
चुनी हुई विधियों की आमने-सामने समीक्षा करें; भिन्नता वाली पंक्तियाँ रेखांकित हैं।
| इलेक्ट्रॉन स्पिन रेजोनेंस डेटिंग× | यूरेनियम-थोरियम डेटिंग× | |
|---|---|---|
| क्षेत्र | पुरातत्व | पुरातत्व |
| परिवार | Process / pipeline | Process / pipeline |
| उद्भव वर्ष≠ | 1980s | 1955 |
| प्रवर्तक≠ | Michael Aitken | Harmon Craig |
| प्रकार≠ | Paramagnetic resonance dating technique | Decay series dating technique |
| मौलिक स्रोत≠ | Grün, R. (1989). Electron spin resonance (ESR) dating. Quaternary International, 1, 65-109. DOI ↗ | 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 ↗ |
| उपनाम≠ | ESR dating, electron paramagnetic resonance dating, EPR dating | U-Th dating, thorium-230 dating |
| संबंधित | 4 | 4 |
| सारांश≠ | 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. | 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. |
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