Lead and Barium concentrations and Lead isotope ratios in EPICA Dome C ice 572-801 kyr B.P.

A record of Pb and Ba concentrations and Pb isotopic compositions are presented for the EPICA Dome C ice core covering the two oldest glacial-interglacial cycles (~572 to 801 kyr ago) characterized by lukewarm interglacials in the European Project for Ice Coring in Antarctica Dome C ice core, provides evidence for dust provenance in central East Antarctic ice prior to the Mid-Brunhes Event (MBE), ~430 kyr ago.

本研究针对欧洲南极冰芯钻探计划（European Project for Ice Coring in Antarctica, EPICA）穹顶C（Dome C）冰芯，呈现了覆盖两个最古老冰期-间冰期旋回（距今约57.2万至80.1万年前，该旋回以偏温凉的间冰期为特征）的铅（Pb）、钡（Ba）浓度及铅同位素组成记录，为距今约43万年前的中布容事件（Mid-Brunhes Event, MBE）发生前东南极中部冰体的粉尘物源问题提供了实证支撑。