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首页> 外文期刊>ISIJ international >Sulfide Ore Smelting at the Naganobori Copper Mine Recorded on Speleothems from the Ogiri No. 4 Pit on the Akiyoshi-dai Plateau, Yamaguchi, Japan
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Sulfide Ore Smelting at the Naganobori Copper Mine Recorded on Speleothems from the Ogiri No. 4 Pit on the Akiyoshi-dai Plateau, Yamaguchi, Japan

机译：日本山口县秋吉大高原小g 4号坑的Sp虫科记录的长尾ori铜矿上的硫化矿冶炼

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摘要

At the Naganobori Copper-Mine site, Akiyoshi-dai, Yamaguchi, southwestern Japan, the mining of copper ores dates back from the end of the 7th century to the beginning of the 8th century. The copper ore smelting was considered to be performed near the mine. Although copper ores in the oxidizing zone should have been used in the early stages, but later the sulfide ores in the enriched and primary zones, it has not yet been clarified as to when the smelting of the sulfide ores was started. The environmental change information for the past two thousand years was extracted from two growing stalagmites in the Ogiri No. 4 pit. Their fluorescent annual microbanding information was used for dating. The sulfate concentration was almost constant from 100 to 1400 A.D., and then clearly increased, suggesting that the extensive smelting of the sulfide ores had started. The concentration gradually increased, reached a maximum in the early stages of the 1700s, and then increased again from 1900. The magnesium concentration changed, almost synchronizing with the sulfate concentration. The possible reduction of the biomass by acid rain or leaching of the magnesium ions from the soil was suggested. The records extracted were in good agreement with those partially extracted from ancient documents, ancient picture maps and topographical maps. The copper used for the Great Buddha of Nara casting has the high possibility of being smelted using copper ores from the oxidizing zone.
机译：在日本西南部山口县秋吉台长野ori铜矿区，铜矿石的开采可追溯至7世纪末至8世纪初。铜矿冶炼被认为是在矿山附近进行的。尽管应该在早期使用氧化区中的铜矿石，但后来在富矿区和初级区中使用硫化矿石，但尚不清楚何时开始冶炼硫化矿石。过去2000年的环境变化信息是从小O里4号矿井中两个生长的石笋中提取的。他们的荧光年度微带信息用于约会。硫酸盐的浓度从100到1400 A.D.几乎是恒定的，然后明显增加，这表明硫化矿石的大规模熔炼已经开始。浓度逐渐增加，在1700年代初期达到最大值，然后从1900开始再次增加。镁的浓度发生了变化，几乎与硫酸盐的浓度同步。建议通过酸雨或从土壤中浸出镁离子来减少生物量。提取的记录与部分从古代文献，古代图片地图和地形图中提取的记录非常吻合。奈良铸造大佛所用的铜极有可能被氧化区的铜矿石冶炼。

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