Whole-rock major element and mineral major element geochemistry from Piqiang alkali basalt

Four supplementary data tables (S1–S4) are included in this submission. Supplementary Data Table S1 reports whole-rock major-element compositions for the Piqiang basalts in Western Tianshan. Supplementary Data Table S2 provides major-element geochemical data for clinopyroxenes. Supplementary Data Table S3 lists major-element geochemical data for olivines. Supplementary Data Table S4 contains major-element compositions of spinel inclusions hosted in olivines.