鉛同位体比からみた日韓青銅資料の原料の産地  [in Japanese] Provenance Studies on Japanese and Korean Bronze Objects by Lead Isotope Analysis  [in Japanese]

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Abstract

日本と韓国で出土した青銅資料について,鉛同位体比からみた原料の産地推定を行った結果をまとめた。韓国研究機関の研究者によって,韓国産鉛鉱石のデータが新たに報告されたことにより,これまで困難であった日本の古墳出土資料の原料の産地を推定できる可能性がきわめて高くなった。また一方で,韓国出土資料であっても,朝鮮半島産のほかに中国産の原料が使用されたと推定される場合があることもわかった。島根県の加茂岩倉遺跡出土銅鐸の分析からは,銅鐸の型式によって原料の産地が切り替わる時期が明確に示された。また本体と鋳掛部分との比較から,同じ原料を使用している場合と,鋳掛時に異なる産地の原料が追加されている場合があることがわかった。これまで取られてきた表示法(a式図,b式図)では,韓国産鉛鉱石のデータに,中国産や日本産鉛鉱石の分布範囲と重なる部分があり,これらを識別する有効な表示法をみつける必要がある。ただし,気をつけなければいけないのは,それらはあくまでも現在採取できる鉱山の試料だということである。出土青銅資料の原料の産地を推定するためには,それと同時期に稼働していた鉱山であるかどうか,原料の採掘地と資料の製作地との間につながりがあったかどうかなどを検証する必要があり,単に考古資料と数値を比較しただけで考察することはできない。韓国における,今後の鉱山遺跡や製錬遺跡の調査が待たれる。

The results of estimating the locations of origin of the raw materials of bronze resources excavated in Japan and Korea based on their lead isotope ratio are summarized. New data of Korean lead minerals published by researchers at Korean research institutes have dramatically increased the likelihood of success in estimating the locations of origin of the raw materials of resources excavated at Japanese tumuli, which had been problematic. Another find was that in some cases, resources excavated in Korea had been inferred to have raw materials originating in China, not only in the Korean Peninsula.A study of the dotaku (ceremonial bronze bells) excavated at the Kamo-Iwakura archeological site in Shimane Prefecture clearly indicated the timing of when the origin of raw materials change, according to the type of dotaku. Further, by comparing the body of the dotaku with its mended parts, it was discovered that, in some cases, the same raw materials were used while in other cases, raw materials of a different origin were added during mending.Display methods which had been used (figure format A and figure format B) show that the data of Korean lead minerals has regions overlapping with the distribution for Chinese and Japanese lead minerals, and there is a need to find an effective display method which would succeed in distinguishing them. However, it must be kept in mind that those samples are only from mines which facilitate sampling today. Estimating the location of origin of the raw materials for excavated bronze resources would still require verifying factors such as whether the mine was active at the time and whether there was a link between the location the raw material was mined and the location the resource was fabricated. It cannot be speculated simply by comparing archeological resources with the numerical values. Further investigation into remains of mines and smelting facilities in Korea is anticipated.

Journal

  • 国立歴史民俗博物館研究報告 = Bulletin of the National Museum of Japanese History

    国立歴史民俗博物館研究報告 = Bulletin of the National Museum of Japanese History 213, 69-125, 2019-01

    国立歴史民俗博物館

Codes

  • NII Article ID (NAID)
    120006820391
  • NII NACSIS-CAT ID (NCID)
    AN00377607
  • Text Lang
    JPN
  • Article Type
    departmental bulletin paper
  • ISSN
    0286-7400
  • NDL Article ID
    029510577
  • NDL Call No.
    Z8-2017
  • Data Source
    NDL  IR 
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