Elemental mapping data of the hydrothermal ferromanganese oxides obtained from a petit-spot volcano

The dataset consists of elemental mapping data of hydrothermal ferromanganese oxides (D05-20 and D05-21) obtained from a petit-spot volcano in the western North Pacific Ocean. The elemental mapping of Al, Ca, Cu, Fe, K, Mg, Mn, Ni, Rb, S, Si, and Zn was performed on polished cross sections of the samples using micro-XRF (XGT7000V, Horiba, Kyoto, Japan) with energy-dispersive X-ray spectroscopy at Kyoto University. The analysis was repeated 15 times at a tube voltage of 50 kV, a tube current of 0.9 A, and an X-ray beam diameter of 100 µm. Scanning was performed in ~75 µm intervals (pixel size) at a rate of 9 ms/pixel. The intensity was determined as the cumulative intensity of the 15 analyses (total analysis time = 135 ms/pixel).