Supplementary data for "Global K cycle revisited: The role of arc hydrothermal systems".

S1-Major element concentrations and K isotope compositions of altered cores sample from the Brothers Volcano. S2-Major element concentration of unaltered rocks from the Brothers Volcano.S1-布鲁克斯火山（Brothers Volcano）蚀变岩芯样品的主量元素含量与钾同位素组成；S2-布鲁克斯火山未蚀变岩石的主量元素含量。