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开启一段与四千年前制盐业的时空对话-中工文化-中工网


孙智彬的团队想以对比的形式,将中坝的发现与盐业生产遗址的发现相互校验,以验证遗址性质,却发现没有可以比照的资料――在中坝遗址发掘之前,国内还没有开展过盐业考古。
“当时我们能够看到的与盐业生产有关的历史遗物,只有汉砖上的盐业生产场景。”孙智彬说。
“有三类证据,可以证明中坝遗址与盐业生产有关。第一类证据来自土壤残留物。对中坝采集的土壤样本进行X射线荧光分析,发现土壤样本中所含的钙、镁含量特别高。第二类证据来自制盐陶器。通过对中坝遗址东周时期圜底罐进行X射线衍射分析,发现陶罐底部残留的钙化物成分,与自贡古代制盐作坊煮盐平底锅内的残留物相同。第三类证据来自陶器内壁的残留物。扫描电子显微镜检测分析表明,中坝遗址出土的圜底罐内壁残留Na和Cl的浓度很高,浓度从内到外呈� ....

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