A study about ancient iron production using radiocarbon dating -Toward elucidation of an actual grasp of a manufacturing process of an ancient iron products-

本研究通过采用古代制铁方法的制铁实验，高效地收集了实验提供的废铁、生铁以及本案例中使用的木炭中所含的碳，并用加速器质谱法进行了14c年龄测定。结果表明，使用前的年龄几乎与木炭相同，铁产品中碳的历史检查表明，它来自于制造铁的情况下使用的木炭。精炼锻造是形成铁产品的过程之一，铁产品的年代值已经证实它受到当时使用的木炭的影响。研究结果表明，炼铁遗址和精炼铁匠遗址出土的铁屑和铁块残余物的碳史来自于生产中使用的木炭，能够证实14 C年龄测定的合法性和有效性。然而，当我对同一铁产品内部进行14c年龄测量时，在几个样品中观察到年龄值超过测量误差的分散。对于这些样品的分散，我们认为是由于采样方法和采样位置以及样品生锈导致碳污染的可能性造成的。为了解决该年龄值的分散问题，对采样方法或样品中锈蚀碳污染的影响的检验留作将来的问题。此外，为了检验物、物、法的发展，以更高的纯度更高效地提取每一道古制工序中的产品和副产品中的碳，并加以提炼是必不可少的。

In this study, through the iron manufacture experiment that used an ancient iron manufacture method, the efficiency collected the carbon which was inherent in iron refuse and pig iron provided by the experiment and the charcoal which it used in this case and did the 14 C age measurements by accelerator mass spectrometry method. The result shows the age that is almost same as charcoal before use, the history of carbon in an iron product inspected that it came from charcoal used in case of iron manufacture. In refinement blacksmithing that was one of process for forming of an iron product, the age value of the iron product has verified to have it the charcoal that was used then influenced.By these study result, a carbon history of iron refuse and iron lump remains to be excavated in iron-manufacturing sites and refinement blacksmith sites came from the charcoal which used in production and it was able to confirm legitimacy and the effectiveness of those 14 C age measurement.However, the dispersion that exceeded measurement error in the age value in several samples was watched when I did the 14 C age measurement about the inside same iron product. As for dispersion of these samples, we thought that we were caused by a sampling method and a sampling position and possibility of carbon pollution by rust of a sample.In order to solve a problem of dispersion of this age value, inspection about a sampling method or influence of carbon pollution by rust in a sample was left as a future problem. In addition, in order to inspect the thing, development of method the efficiency extracts carbon in product occurring every an ancient manufacturing process and carbon in a byproduct by high purity well more, and to refine is indispensable.