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| 同位体比質量分析法× | 放射性炭素年代測定法× | |
|---|---|---|
| 分野 | 地球物理学 | 地球物理学 |
| 系統 | Process / pipeline | Process / pipeline |
| 提唱年≠ | 1994 | 1949 |
| 提唱者≠ | Thomas Coplen and others | Willard Libby |
| 種類≠ | Measurement of stable and radiogenic isotope ratios | Chronometric method based on ¹⁴C decay |
| 原典≠ | Coplen, T. B. (1994). Reporting of stable hydrogen, carbon, and oxygen isotopic abundances. Pure and Applied Chemistry, 66(2), 273-276. DOI ↗ | Libby, W. F. (1949). Radiocarbon dating. University of Chicago Press. link ↗ |
| 別名≠ | IRMS | ¹⁴C dating, Carbon-14 dating |
| 関連 | 3 | 3 |
| 概要≠ | Isotope Ratio Mass Spectrometry (IRMS) is an analytical technique that measures the relative abundance of stable isotopes (H, C, N, O, S) and some radiogenic isotopes (e.g., ⁸⁷Sr/⁸⁶Sr) in samples with high precision. Standardized by Coplen and colleagues, IRMS enables paleoclimate reconstruction, source tracing (diet, water origin), geochemical fingerprinting, and age dating through radiogenic isotopes. | Radiocarbon dating is a radiometric technique that determines the age of organic materials by measuring the radioactive decay of ¹⁴C (carbon-14), a rare isotope produced in the atmosphere by cosmic ray interactions. Developed by Willard Libby in 1949, radiocarbon dating became a foundational method in archaeology, paleoclimate studies, and geology, enabling dating of organic materials from the past ~50,000 years with typical precision of ±50–100 years. |
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