Abstract
<p>Supplemental Text S1: Analytical methods. Figure S1: Geologic cross section of No. 30 exploration line of Dahongshan deposit, showing spatial relationship between intensely metasomatic rocks and Fe-Cu orebodies. Figure S2: Plots of major element compositions of allanite in metasomatic or mineralized rocks in Dahongshan Group, using per formula unit (apfu) and atomic ratio. Figure S3: Th-U plot displaying contrasting Th and U concentrations among different occurrences of allanite. Figure S4: Representative LA-ICP-MS down-hole profile of U-Pb isotopic ratios of mixed analyses of monazite I (DHS13-60). Table S1: Allanite chemical compositions. Table S2: SHRIMP U-Pb data of allanite. Table S3: SHRIMP U-Pb data of monazite. Table S4: LA-ICP-MS U-Pb data of allanite. Table S5: LA-ICP-MS U-Pb data of monazite. Table S6: LA-ICP-MS U-Pb data of apatite. Table S7: LA-ICP-MS U-Pb data of rutile. Table S8: ID-TIMS Re-Os data of molybdenite. Table S9: Compilation of available geochronology data for hydrothermal events in Dahongshan Group. Table S10: References of data sources for Fig. 14 in text.</p>
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