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Table 4 Relationship among NCTM (calculated from the CT images at 140kV), ρt, and Zet for each of the samples

From: Quantitative determination of the lowest density domain in major fault zones via medical X-ray computed tomography

Fault name Location Material Sample number Pixel count NCTM SD of NCTM ρt ρc = ANCTM+B ρc (ρcρt)/ ρt Zet Zec = CNCTM+D Zec (ZecZet)/Zet
A B C D
MTL Hiji Cataclasite HJ8-1 113570 1333 277 2.03 9.54×10-4 0.76 2.03 0.0% 12.30 2.67×10-4 11.8 12.16 -1.1%
Fault gouge HJ8-2 122389 1109 192 1.70 1.82 7.1% 12.04 12.10 0.5%
Fault gouge HJ8-3 73380 994 176 1.89 1.71 -9.5% 12.24 12.07 -1.4%
Fault gouge HJ8-4 61075 1065 170 1.80 1.78 -1.1% 12.12 12.08 -0.3%
Cataclasite HJ8-5 39613 1281 312 1.87 1.98 5.9% 12.11 12.14 0.2%
Mizoguchi Protolith MZ-5 132804 2056 112 2.77 2.72 -1.8% 12.38 12.35 -0.2%
Awano-Tabiki Protolith ATS-2 119482 1961 129 2.66 1.08×10-3 0.56 2.68 0.8% 12.64 1.57×10-3 9.47 12.55 -0.7%
ATS-1 63283 1640 177 2.61 2.33 -10.7% 12.63 12.04 -4.7%
Cataclasite AT-1 202405 1765 171 2.26 2.47 9.3% 11.34 12.24 7.9%
Fault gouge AT-2 17591 1209 143 1.79 1.87 4.5% 11.52 11.37 -1.3%
Fault gouge AT-3 11968 1665 104 2.31 1.19×10-3 0.40 2.38 3.0% 11.36 3.31×10-3 5.87 11.38 0.2%
Cataclasite AT-4 103475 1864 161 2.61 2.62 0.4% 11.45 12.04 5.2%
Cataclasite AT-5 52123 1718 123 2.44 2.44 0.0% 11.42 11.56 1.2%
Cataclasite ATR-2,3 80661 1943 90 2.56 2.71 5.9% 12.17 12.30 1.1%
Mylonite ATR-4 132075 1820 210 2.65 2.57 -3.0% 12.13 11.89 -2.0%
Protolith HA-1 134722 1908 209 2.76 2.67 -3.3% 12.72 12.19 -4.2%
Tsuruga Oritodani Protolith K-1 311751 1656 186 2.58 1.23×10-3 0.45 2.49 -3.5% 12.16 2.83×10-4 11.6 12.07 -0.7%
Cataclasite C-3 234228 1699 164 2.47 2.54 2.8% 12.11 12.08 -0.2%
Cataclasite C-2 241788 1471 93 2.16 2.26 4.6% 12.10 12.02 -0.7%
Fault gouge T-3-1 94154 1492 70 2.28 2.29 0.4% 11.96 12.02 0.5%
Fault gouge T-3-2 64118 1428 121 2.27 2.21 -2.6% 12.08 12.00 -0.7%
Fault gouge T-3-3 19558 1185 140 2.15 5.47×10-4 1.42 2.07 -3.7% 12.54 7.66×10-4 12.1 13.01 3.7%
Cataclasite T-3-4 78628 1622 206 2.23 2.31 3.6% 13.55 13.34 -1.5%
Cataclasite C-1 203854 1981 177 2.43 2.50 2.9% 14.10 13.62 -3.4%
Protolith T-5 201781 2590 204 2.90 2.84 -2.1% 13.96 14.08 0.9%
Yamada Mushu Fault gouge YDA-3 49921 1108 130 2.05 9.79×10-4 0.85 1.93 -5.9% 11.99 6.95×10-4 11.2 11.97 -0.2%
Cataclasite YDA-4 165093 1333 119 1.98 2.16 9.1% 12.05 12.13 0.7%
Karakawa Protolith YK-1 329517 1730 244 2.61 2.54 -2.7% 12.45 12.40 -0.4%