Studies on excavated ancient charcoal (I)

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  • 埋蔵木炭に関する研究 (I)
  • 埋蔵木炭に関する研究-1-芝谷遺跡出土木炭の性状
  • マイゾウ モクタン ニカンスルケンキュウ 1 シバタニ イセキ シュツドボクタ
  • 芝谷遺跡出土木炭の性状
  • The qualities of the charcoal from Sibatani Remains

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Remains J. Jap. For. Soc. 60: 49-55, 1978 The writers studied the qualities of excavated ancient charcoal using a magnifying scope, proximate and thermal analysis, atomic absorption spectrometry, etc. The charcoal had much coloured ash, which contained a fair quantity of metallic components compared with that of modern charcoal. The results are as follows: (1) The surface structure of the excavated ancient charcoal is similar to that of Quercus sp. and Pinus sp. charcoal, and the excavated charcoal has much volatile matter and a little fixed carbon. They may be identified with the uncarbonized substance in modern charcoal. Then, it may be said that they came into existence due to the decomposition of amorphous matter over a long period of excavation. (2) The excavated ancient charcoal has more ash (7_??_16%) than modern charcoal, and especially, there are plenty of metallic components of iron in the ash. The writers presume that those metallic components might have been adsorbed by select-adsorption from the soil water from which the charcoal was excavated, or previously they had contained the metal components as raw materials. (3) The excavated ancient charcoal ash is deeper coloured than modern charcoal ash. It is presumed that this may be because ancient charcoal ash contains greater quantities of various metallic oxides or salts than modern charcoal ash.

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