Fig. 2: Microstructures, cathodoluminescence, chemical and electron backscatter diffraction maps of the studied omphacitite. | Nature Communications

Fig. 2: Microstructures, cathodoluminescence, chemical and electron backscatter diffraction maps of the studied omphacitite.

From: Methane-hydrogen-rich fluid migration may trigger seismic failure in subduction zones at forearc depths

Fig. 2

a Thin section image showing the contact between omphacitite clasts and matrix. Graphite rims omphacitite clasts and is located inside the matrix and along discrete fractures cutting the clasts (Plane‐polarized light). See location in Supplementary Fig. 1. b X-ray map color coded for the different mineral phases. Ttn: titanite, Ap: apatite, Jd: jadeite, Grt: garnet, Omp: Omphacite. c CL image highlighting oscillatory growth zoning in jadeite grains located in the matrix. d Standardized X‐ray map of the FeO weight % in omphacite. Note the decrease of the FeO content toward the rim of the clast. e, f EBSD maps. In all the EBSD maps white lines represent low‐angle boundaries (2–10° of misorientation), black lines represent high angle boundaries (misorientation > 10°), X is parallel to the stretching lineation (Ls) and Z parallel to the pole of the foliation. e GROD map highlighting irregular grain boundaries and low (<5°) internal lattice distortion. f IPF map, color-coded with respect to the X-kinematic axis, displays no crystallographic preferred orientation.

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