Science. 1978 Apr 7;200(4337):11-5. doi: 10.1126/science.200.4337.11.
Thermal diffusion isotopic enrichment of carbon-14 has extended the radiocarbon dating range to about 75,000 years ago. Twenty-eight samples obtained up to June 1976, mainly from northwest Europe, were dated. Consideration of the basic assumptions of carbon-14 dating and of the sources of contamination indicates that the ages are generally reliable. Together with the pollen analytic and stratigraphic the dates yield a more detailed radiocarbon time scale for climatic variations in northwest Europe, showing three early glacial interstades. The radiocarbon time scale agrees with the Camp Century chronology and with the thorium-230 ages of corals representing high sea level stands on New Guinea. Ther is a discrepancy between the radiocarbon time scale and the deep-sea chronology, which may be due to correlation errors. With a modified interpretation of the correlation, all four time scales agree within the estimated experimental uncertainties of the dating techniques used.
热扩散同位素富集法将碳-14 的测年范围扩展到了大约 75000 年前。截至 1976 年 6 月，已对主要来自西北欧的 28 个样本进行了测年。对碳-14 测年的基本假设和污染来源的考虑表明，这些年龄通常是可靠的。与花粉分析和地层学相结合，这些年代为西北欧气候变化提供了一个更详细的放射性碳时间尺度，显示了三个早期的冰川间冰期。放射性碳时间尺度与世纪营年表以及代表新几内亚海平面较高时期的珊瑚钍-230 年龄一致。放射性碳时间尺度与深海年代学之间存在差异，这可能是由于相关性误差。通过对相关性的修正解释，所有四个时间尺度在使用的测年技术的估计实验不确定度内都一致。
