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. Author manuscript; available in PMC: 2017 Aug 8.
Published in final edited form as: Am Mineral. 2015 Apr 1;100(4):824–836. doi: 10.2138/am-2015-5077CCBYNCND

Figure 5.

Figure 5

Evolved gas analysis of H2O from a continuous ramp SAM pyrolysis of drill material from John Klein and Cumberland, compared with data from a ferrian saponite. The ferrian saponite tested is sample AMNH 89172 reported in Treiman et al. (2015). EGA data from the ferrian saponite were acquired under SAM-like conditions in the high-fidelity SAM Testbed laboratory instrument suite (McAdam et al. 2014, and in preparation). Because data from the main mass-to-charge ratio of H2O (m/z 18, H216O) were saturated, counts from H2O isotopologs and fragments were plotted to illustrate H2O signal vs. temperature [m/z 20 (H218O) for John Klein and Cumberland and m/z 17 ×0.1 (OH fragment) for Fe-saponite].