List of the main cations and anions found in hydrothermal fluids of the sampled sites.

Relative abundance of the main bacterial phyla and genera found in the sediments and the hydrothermal fluids of the sampled sites.

Concentrations of the main trace elements ((Mn, Fe, Co, Ni, Cu, Zn, As, Rb, Sr, Zr, Mo, Cs, Ba, La, Ce, Nd, W, U) found in the sampled fluids