Lead isotope fingerprinting techniques help identify and quantify 3,000 years of atmospheric lead pollution from Laguna Roya, northwestern Iberia Supplemental

Until ~1960 CE the primary source of anthropogenic Pb in the Laguna Roya sediment record was atmospheric Pb pollution from distant, largescale metal refining in the SW. Dated slag Pb isotope ratios from the Rio Tinto mining district provided strong evidence to identify the source of Pb pollution in Laguna Roya sediments. The primary source of lake sediment Pb pollution after 1960 CE is metal processing from the SW mining district (~85%) whereas leaded gasoline contributes ~15%.直至公元1960年前后，拉古纳·罗亚（Laguna Roya）沉积物记录中的人为源铅（anthropogenic Pb），其主要来源为西南地区远距离大规模金属冶炼活动产生的大气铅污染。采自力拓（Rio Tinto）矿区的定年炉渣铅同位素比值，为识别拉古纳·罗亚沉积物中的铅污染来源提供了强有力的证据。公元1960年之后，该湖泊沉积物铅污染的主要来源为西南矿区的金属加工活动，占比约85%；而含铅汽油的贡献占比约为15%。