Geochemical and mineralogical characteristics of fault gouge in the Median Tectonic Line, Japan: evidence for earthquake slip

Earth, Planets and Space

Table 2 Mineral compositions from X-ray diffraction data

	FZ01	FZ02	FZ03	FZ04	FZ05	FZ06	FZ07	FZ08	FZ09	FZ10	FZ11	FZ12
RockJock's bulk mineral composition
Quartz	35.2	37.1	34.1	41.5	44.5	29.1	24.1	24.0	0.0	0.0	0.0	0.0
K-feldspar	0.0	0.0	0.0	0.0	0.0	5.0	0.0	15.4	0.0	0.3	0.0	1.2
Plagioclase	0.0	0.0	0.0	0.0	0.0	7.1	29.5	24.5	0.0	0.1	0.0	10.9
Dolomite	0.3	0.4	0.6	1.3	1.2	2.5	0.0	0.0	0.0	0.1	0.0	0.0
Ankerite	6.9	6.2	8.6	3.8	3.8	6.0	0.8	1.8	0.0	0.2	0.0	2.0
Siderite	3.3	4.1	3.8	2.9	1.2	0.0	0.4	0.1	0.0	0.0	0.0	0.0
Amphibole	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	3.0	31.8	50.9	28.9
Magnetite	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	4.3	1.0	0.0	1.4
Forsterite	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	3.6	0.6	0.0	0.0
Total non-clay	45.7	47.8	47.1	49.5	50.7	49.7	54.8	65.8	10.9	34.1	50.9	44.4
Serpentine	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	5.5	0.0	0.0	0.0
Kaolinite	19.0	15.4	11.2	6.0	2.4	0.0	0.0	1.8	0.0	0.0	0.0	0.0
Smectite	0.0	0.0	0.0	0.0	0.0	0.0	0.0	6.7	30.4	13.1	10.1	12.9
Illite	22.9	26.0	24.8	32.2	39.3	3.6	12.8	12.2	0.0	0.0	0.0	0.1
Chlorite	0.0	0.0	0.0	0.0	0.0	18.5	21.7	22.5	36.9	43.2	35.8	33.3
Total clay	41.9	41.4	36.0	38.2	41.7	22.1	34.5	43.2	72.8	56.3	45.9	46.3
Total	87.6	89.2	83.1	87.7	92.4	71.8	89.3	109.0	83.7	90.4	96.8	90.7
Biscaye's relative clay mineral composition
Kaolinite	8.5	6.8	8.5	1.7	1.8	0.0	0.0	1.5	0.0	0.0	0.0	0.0
Smectite	0.0	0.0	0.0	0.0	0.0	0.0	0.0	25.1	57.7	34.7	48.8	41.7
Illite	91.5	93.2	91.5	98.3	98.2	6.8	14.9	11.7	0.0	0.0	0.0	0.0
Chlorite	0.0	0.0	0.0	0.0	0.0	93.2	85.2	61.7	42.3	65.3	51.2	58.3
Total	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0