Research on the production and circulation of bronze mirror in Japan and China.

矿山朱砂取样与测量678个样品的朱砂矿石由日本地质调查地质博物馆、国家先进工业科学技术研究所赠送。这些矿石是从几乎所有开采朱砂的日本矿山中收集的。从废墟中收集朱砂：收集标本的废墟是从弥生时代后期到古坟时代（公元100年至400年）的日本皇室古墓中挑选出来的。测定朱砂粉的重量。在标本中加入王水并使其溶解。采用电感耦合等离子体原子吸收光谱法（ICP-AES）测定样品中微量元素的含量（icp - 1000iii, Shimadzu Co., Kyoto, Japan）。结果同一矿山朱砂矿石中微量元素含量比较。为了观察同一只小鼠体内朱砂的含量是否相近，我们测定了同一矿山采集地朱砂矿石中的含量。结果表明，同一矿山采收的朱砂中微量元素含量相近。不同矿区朱砂矿石中微量元素含量的比较对4个主要矿山，即奈良县的Yamato矿、Mie县的Niu矿、德岛的Sui矿和北海道的Itomuka矿的采掘朱砂进行了测定，比较了朱砂中微量元素含量。结果表明，各地雷的辐射水平存在差异。不同遗址中朱砂微量元素含量的比较对大和地区遗址中朱砂的含量进行测定时，发现遗址中使用的是大和和牛矿区出土的朱砂。相反，推测德岛若杉山遗址中使用的朱砂是从Sui矿中挖掘出来的。

Sampling and measurementCollection of cinnabar from minesThe cinnabar ore of 678 samples were gifted from Geological Museum of Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology. Those ores were collected from almost of all Japanese mines in where a cinnabar was worked.Collection of cinnabar from ruinsThe ruins collecting the specimens were selected from old tomb of Royal family of Japan from the latter term of Yayoi era to Kofun era (A.D. 100 to 400).Measurement Powdered cinnabar was weighed. Aqua regia was added to the specimen and dissolved it. Contents of trace elements in the specimen were measured by Inductively Coupled Plasma Atomic Absorption Spectrometry (ICP-AES) (ICPS-1000III, Shimadzu Co., Kyoto, Japan).Results Comparison of the contents of trace elements in cinnabar ores collected in same mines. For observation whether the contents in cinnabar were similar levels in one mice or not, we measured the contents in cinnabar ores recorded the collecting place in same mines. As the results, similar levels of trace elements in cinnabar were observed in the ores collected in same mines.Comparison of the contents of trace elements in cinnabar ores between minesOres from four major mines, Yamato mine (Nara Prefecture), Niu mine (Mie Prefecture), Sui mine (Tokushima Prefecture), and Itomuka mine (Hokkaido Prefecture), excavated cinnabar were measured for comparing the contents of trace elements in cinnabar.As the results, there was difference the levels between the mines. It is thought that the difference depends on the components of ore.Comparison of the contents of trace elements in cinnabar between ruinsWhen the contents in cinnabar collected from the ruins in Yamato area were measured, the cinnabars excavated either Yamato or Niu mines were used in the ruins. On the contrary, it is speculated that the cinnabar used in Wakasugi-Yama ruin in Tokushima was excavated from Sui mine.