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Table 3 Measured results of thermal conductivities and estimated values of thermal diffusivities and volumetric heat capacities

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

Lithologic unita

Depth interval of the unit (mbsf)

Depth interval of samples in the unit (mbsf)

Number of data

Bulk measurement values (TC) and predicted values (TD and VHC)b

    

TC Wm−1K−1

TD 10−7m2s−1

VHC MJm−3K−1

1

176.5-185.2

176.8-183.1

4

0.94 ± 0.09

3.02 ± 0.46

3.15 ± 0.21

2

648.0-659.7

648.5-656.6

7

1.18 ± 0.10

4.10 ± 0.54

2.89 ± 0.14

3

688.5-820.1

688.8-819.0

50

1.16 ± 0.08

3.99 ± 0.40

2.91 ± 0.10

4

821.5-822.5

822.1-822.3

4

1.16 ± 0.09

4.01 ± 0.48

2.91 ± 0.12

5

824.0-832.9

824.0-832.5

13

1.14 ± 0.06

3.99 ± 0.31

2.88 ± 0.15

6

832.9-833.5

833.0-833.4

4

1.08 ± 0.06

3.60 ± 0.32

3.01 ± 0.09

7

833.5-836.8

833.6-836.8

5

1.40 ± 0.17

5.29 ± 0.89

2.67 ± 0.16

  1. aLithologic units are comprised as follows: unit 1, slope facies or wedge sediments; 2, brown and bluish gray mudstone; 3, gray mudstone; 4, sheared clay; 5, brown mudstone; 6, pelagic clay; and 7, chert. Because the coring used was not continuous, the depth intervals of lithologic units recognized by the core description are not continuous (Expedition 343/343T Scientists 2013c).
  2. bTC, thermal conductivity; TD, thermal diffusivity; VHC, volumetric heat capacity were shown in a form of average and one standard deviation. TC is calculated from measured data by all the three methods (Figure 4A), but TD and VHC from the estimated values and measured values using the hot-disk method (Figure 6A,B).