C. Flaux, Sabrina Save, M. Scrinzi, Nicolas Minvielle Larousse, Christophe Vaschalde, Audrey Renaud, Margaux Tillier, A. Guihou, P. Deschamps, A. Véron
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引用次数: 0
摘要
摘要:在距离尼姆古城(法国东南部)下游3公里的Vistre de la Fontaine 2-2考古遗址发掘了一条古河道,提供了一个覆盖过去2500年的堆积序列。对这些冲积沉积物的微量金属分析揭示了罗马帝国早期的铅污染,其浓度接近1000ppm,比当地地球化学背景高出100倍。这种过量的Pb显示出统一的同位素特征,可能反映了未改变的矿石来源,可能来自Massif Central或大不列颠。铅峰值伴随着可见的废物,这些废物在罗马帝国早期发展尼姆城市供水和排水网络时在方丹河畔的沉积物中运输。这项研究表明,城市周边冲积平原的古污染持续了数千年,以及河流沉积档案在记录古废物方面的相关性。
Roman-era alluvial waste in the Vistre de la Fontaine (Nîmes, southeast France): from a sacred spring to a contaminated river
Abstract The excavation of a palaeochannel at the Vistre de la Fontaine 2-2 archaeological site, 3 km downstream from the ancient city of Nîmes (southeastern France), provided an accumulation sequence covering the last 2,500 years. Trace metal analyses of these alluvial sediments disclosed lead (Pb) contamination during the Early Roman Empire, with concentrations close to 1,000 ppm, a factor of 100 above the local geochemical background. This excess of Pb shows a uniform isotopic signature that may reflect unchanged ore sources, perhaps from the Massif Central or from Great Britain. The Pb peak accompanied visible waste that was transported in the sediments of the Vistre de la Fontaine at the time of the development of the Nîmes urban water supply and drainage network during the Early Roman Empire. This research shows the bimillennial persistence of palaeo-contamination in a peri-urban alluvial plain and the relevance of fluvial sedimentary archives in documenting ancient waste.