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Figure 6 | Journal of Applied Volcanology

Figure 6

From: The thermal stability of Eyjafjallajökull ash versus turbine ingestion test sands

Figure 6

High-resolution DSC results (Platinum crucibles were used at 10 K/min heating rate under argon atmosphere.) for the 90 < ϕ < 125 μm grainsize fraction of EYJA. The black curve was achieved measuring a pristine sample as collected in the field. The grey curve was achieved measuring a remelted sample after the thermogravimetry experiment (Figure 5). The peak at 750°C can be attributed to the glass transition. The peak of the pristine ash is less pronounced due to the crystals content in the ash grains. The curve of “remelted ash” shows the minor difference between bulk rock and interstitial melt.

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