Figure 3: The distribution of the slab’s dehydration gradient (IMAGE)

Kobe University

Figure 3: The distribution of the slab’s dehydration gradient

Caption

The dehydration gradient refers to the water content per unit length in the subduction direction of the plate. The dehydration gradient distribution is plotted only in the region where the depth of the slab surface is shallower than the bottom of the model (200 km) and where the temperature is higher than 200 °C (for which phase diagram data exists). The white line indicates the area where low- frequency tectonic tremors occur, as shown in Figure 1. (a) The slab surface (0 km). (b) 6 km depth from the slab surface. (c) 10 km depth from the slab surface.

Credit

Iwamoto, K., Suenaga, N. & Yoshioka, S. Relationship between tectonic tremors and 3-D distributions of thermal structure and dehydration in the Alaska subduction zone. Sci Rep 12, 6234 (2022). https://doi.org/10.1038/s41598-022-10113-2

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