Figure 4
(a) Optical image and XRF RGB-map (red: Fe; green: Mn; blue: Ni) of a weathered peridotite from the New Caledonia ophiolite. Fe (b) and Ni (c) K-edge XANES of different regions of the rock, highlighting the presence of different types of minerals with contrasted redox states for iron, and variable amounts of nickel. |