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. 2010 Nov 25;5(4):692–703. doi: 10.1038/ismej.2010.157

Figure 3.

Figure 3

MicroXAS analysis of cross-section through reacted pyrite/hematite chip from Hole U1301A experiment. (a) XRF elemental map—with Fe in blue, Mn in green and S in red—revealing a Mn-rich crust coating the upper surface of the Fe-rich chip. (b) Fe K-edge XANES spectra of the Hole U1301A crust in comparison with reference standards (where ‘JdF biogenic' refers to the material described in Toner et al., 2009), indicating that the particles underneath the crust have an iron oxyhydroxide signature. (c) Mn K-edge XANES of the Hole U1301A crust in comparison with reference standards, indicating that the Mn in the crust is in the form of Mn(II). Note y-axis in panels (b) and (c) depict normalized absorbance on an arbitrary scale. The color reproduction of this figure is available on the html full text version of the manuscript.