Major and selected trace elements for ancient glacial diamictites

These data are whole-rock major and trace element measurements for ancient glacial diamictites from the Paleozoic, Neoproterozoic, Paleoproterozoic, and Mesoarchean. They show systematic changes in transition metals that can be attributable to two affects: 1) gradual evolution of the average composition of the upper continental crust towards a more evolved composition; and 2) loss of redox sensitive elements from the continental crust and transfer to the oceans due to increasing levels of oxidative weathering as atmospheric oxygen levels rose.

本数据集包含了古生代、新元古代、古元古代和中元古代古老冰川杂砾岩的基岩主量元素和微量元素测量数据。这些数据揭示了过渡金属的系统变化，这些变化可归因于以下两种影响：1）上地壳平均组成的逐渐演化，趋向于更为演化的组成；2）由于大气氧含量上升导致的氧化风化程度加剧，红氧敏感性元素从大陆地壳中流失并转移至海洋。