Thermal conductivities, thermal diffusivities, and volumetric heat capacities of core samples obtained from the Japan Trench Fast Drilling Project (JFAST)

Earth, Planets and Space

Table 2 Measurement results using hot-disk method in the four whole-round core samples and fused silica

Sample ID	Depth (mbsf)	Bulk measurement			Anisotropic measurement
		TC Wm⁻¹K⁻¹	TD 10⁻⁷m²s⁻¹	VHC MJm⁻³K⁻¹	Ax TC Wm⁻¹K⁻¹	Ax TD 10⁻⁷m²s⁻¹	Rad TC Wm⁻¹K⁻¹	Rad TD 10⁻⁷m²s⁻¹
Fused silica		1.32 ± 0.00	8.27 ± 0.00	1.60 ± 0.00	1.32 ± 0.01	8.27 ± 0.07	1.33 ± 0.01	8.30 ± 0.07
No. 1	~177	0.92 ± 0.01	3.16 ± 0.09	2.92 ± 0.09	0.90 ± 0.00	3.16 ± 0.01	0.94 ± 0.00	3.29 ± 0.00
No. 2	~697	1.14 ± 0.01	3.80 ± 0.04	2.99 ± 0.01	1.11 ± 0.01	3.72 ± 0.04	1.15 ± 0.02	3.84 ± 0.08
No. 3	~802	1.05 ± 0.01	3.52 ± 0.08	2.99 ± 0.03	1.05 ± 0.02	3.50 ± 0.08	1.03 ± 0.05	3.45 ± 0.16
No. 4	~828	1.08 ± 0.02	4.43 ± 0.06	2.44 ± 0.04	1.11 ± 0.04	4.61 ± 0.35	1.07 ± 0.03	4.46 ± 0.03

Thermal conductivity (TC) and thermal diffusivity (TD) were measured in both bulk mode and anisotropic mode respectively, and volumetric heat capacity (VHC) was calculated from the two measured thermal properties. ‘Ax TC’ and ‘Ax TD’ denote TC and TD in an axial direction in the core samples, and ‘Rad’ denotes the radial direction. The measured results are shown in the format of mean ± 1 standard deviation values, and each was measured six times.