Supplemental Material: Rubidium (Rb) enrichment processes in a highly evolved granitic system: Insights from the petrology and geochemistry of the Guobaoshan Rb deposit in eastern Tianshan, NW China

Table S1: LA-ICP-MS zircon U-Pb dating results of the biotite granite and columbite-group minerals from the amazonite granite. Table S2: In situ Rb-Sr isotope analysis results of amazonite-bearing granites, amazonite granite, amazonite pegmatite, and host rock minerals in the Guobaoshan granitic pluton. Table S3: Major- and trace-element compositions of the biotite granites, muscovite granites, amazonite-bearing granites, amazonite granite, and amazonite pegmatite. Table S4: Hf isotope composition of zircon and Nd isotope composition of bulk rock from the Guobaoshan granitic pluton. Table S5: Summary of age data for the Guobaoshan deposit in eastern Tianshan.