A protohistoric (c.10th–5th c. BC) briquetage site at Puntone (Tuscany, Italy) was studied to unravel the salt production processes and materials involved. Geophysical surveys were used to identify kilns, pits, and dumps. One of these pits and a dump were excavated, followed by detailed chemical and physical analyses of the materials encountered. The pit had been used for holding brine, obtained by leaching of lagoonal sediment over a sieve, that afterwards was discarded to form large dumps. Phases distinguished indicate that the pit filled with fine sediment and was regularly “cleaned.” The presence of ferroan‐magnesian calcite in the pit fill testifies to the prolonged presence of anoxic brine. The production processes could be reconstructed in detail by confronting the analytical results with known changes in composition of a brine upon evaporation. These pertain in particular to the accumulation of “bitterns” and increased B (boron) concentrations in a residual brine. Both could be traced in the materials studied, and were found to be far more indicative than the ubiquitously studied concentrations of Cl and Na.

中文翻译：

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蓬托内（意大利托斯卡纳）的原始历史煤块：基于盐水泻湖沉积物浸出的工业原理和工艺

研究了位于庞托内（意大利托斯卡纳，意大利）的原史（约公元前10至5世纪）煤球遗址，以揭示盐的生产过程和所涉及的材料。地球物理调查被用来识别窑，坑和垃圾场。开挖了其中一个矿坑和一个垃圾场，然后对遇到的材料进行了详细的化学和物理分析。该坑曾被用来盛放盐水，而盐水是通过筛子上的泻湖沉积物的浸出获得的，之后被丢弃形成大的垃圾场。区分的阶段表明该坑充满了细小的沉积物，并定期“清理”。坑填充物中铁-镁方解石的存在证明了缺氧盐水的长期存在。通过使分析结果与蒸发后盐水成分的已知变化相面对，可以详细地重构生产过程。这些特别涉及残留盐水中“卤水”的积累和B（硼）浓度的增加。两者都可以在研究的材料中找到，并且被发现比普遍研究的Cl和Na的浓度更具指示性。