Energy dispersive X-Ray analysis (EDAX) of layers inside manganese crusts retrieved by the R/V Jean Charcot on the Romanche trench area (Atlantic ocean)

Energy dispersive X-Ray analysis (EDAX)has been performed on micro-samples extracted from various surface and inside layers of manganese nodules and manganese crusts covering basalt or volcanic breccia rocks. Measurements have been performed on pellets built from the samples reduced to powder. Results are presented as average of about 10 point measurements. Concentrations have been normalized at 100% of total metal oxides.