An Archaeological Research of the Ancient Nonferrous Metal Production

本研究以七世纪以后推定国内各种金属生产变得安全的时期为研究对象，试图说明相对于铁来说说明较晚的有色金属的产地、冶炼（炼）技术和溶解提纯技术，并对说明支撑古代手工业基础的有色金属的生产方式进行探讨。本研究考察的有色金属有金、银、铜、铅、锡和锑。在黄金产地上，进行了佐渡市西川一带的勘探。结果表明，高崎滨和田尻秀地区有可能与古代的黄金产品有关。并在对马出原镇东屋地区的白银产地进行了勘探。由此证实了古代器皿的洒水现象。事实证明，它有可能回到古代。接着对石池遗址的银熔炉进行了考察，发现了金属冶炼等问题。因此，古代大熔炉的可能性变得清晰起来。关于铜冶炼/精炼，我对发现的熔炉进行了分类和分析。由此可见：(1)八世纪上半叶的圆井炉是最古老的，(2)坑炉的出现时间较晚，(3)坑炉B - C与政府工场密切相关，(4)与炼铜或铸造有关的石炉建筑出现在平安时代或奈良时代后半期。至于铅的冶炼，坑炉有可能追溯到奈良末期。

This research is concerned with the time after the seventh century presumed that the domestic production of various metals becomes securely, tries to explain the productive area, smelting (refining) technology and refinement of dissolution technology about the nonferrous metals that elucidation is late as compared to iron, and to approach for the elucidation of the production style of the nonferrous metals supporting the base of the ancient handicraft.The nonferrous metals examined in this research are gold, silver copper, lead, tin and antimony. On the productive area of gold, the exploration of Nishimikawa a of Sado City was carried out. It became clear that Takasakihama and Tagirisu areas have the possibility that related to the ancient product of gold. And the exploration of Tokoya area in Tsushima's Izuhara Town was carried out in silver productive area. As that result sprinkling of ancient vessel was confirmed. It was proved that it had the possibility to go back to the ancient times.It proceeded with the examination about the silver melting pot of Asukaike site with a problem such as metal smelting. Possibility of cupellation by the melting pot in the ancient times became clear as that result. About copper smelting/refining, I classified and analyzed discovered furnaces. As that result, it become clear that (1) the round shaft furnace in the first half of the eighth century is the oldest, (2) the appearance of the pit furnace is late, (3) the pit furnace B C are deeply concerned with the government workshop, (4) the furnace build of stone concerned with copper refining or casting appeared in Heian Period or the latter half of Nara Period. As for the lead smelting, the pit furnace have the possibility to go back to the end of Nara Period.