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Figure 4 | Earth, Planets and Space

Figure 4

From: Changes in illite crystallinity within an ancient tectonic boundary thrust caused by thermal, mechanical, and hydrothermal effects: an example from the Nobeoka Thrust, southwest Japan

Figure 4

IC value and peak intensity of the borehole core against depth (mbgs) and lithological columnar section. (a) Entire borehole. (b) 30 to 50 mbgs. Note that a large IC value does not mean more crystalline illite, because IC value means full width at half maximum (FWHM) of the illite (001) peak, and therefore a large IC value actually reflects a broader illite (001) peak.

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