Data for: Modern weathering in outcrop samples versus ancient paleoredox information in drill core samples from a Mesoarchaean marine oxygen oasis in Pongola Supergroup, South Africa

Stable Mo, Fe, and U isotopic compositions and U activity ratios of the 2.95 Ga Ijzermijn IF drill core and outcrop samples2.95 Ga伊泽迈恩铁建造（Iron Formation，IF）钻孔岩芯及露头样品的稳定钼（Mo）、铁（Fe）、铀（U）同位素组成与铀活度比