Hill, I.A., Taira, A., Firth, J.V., et al., 1993Proceedings of the Ocean Drilling Program, Scientific Results, Vol. 131

36. DATA REPORT: CORRECTED THERMAL CONDUCTIVITY DATA, LEG 1311

A.T. Fisher,2 J.P. Foucher,3 M. Yamano,4 and R. Hyndman5

INTRODUCTION

Measurements of thermal conductivity made during Ocean Drill-ing Program (ODP) Leg 131 were corrected during the cruise usingthe following set of standards: fresh water, fused silica, Macor ce-ramic, and basalt. The true thermal conductivity of the basalt standardwas not known during Leg 131. In this report, we use a correctedconductivity value for the basalt standard to calibrate measurementsmade during the leg.

METHODS AND RESULTS

A discussion of the theory behind thermal conductivity measure-ments and calibration of the ODP system was provided in the "Ex-planatory Notes" chapter of Taira, Hill, Firth, et al. (1991) and is brieflysummarized here. The needle-probe method is described in detail byVon Herzen and Maxwell (1959) and Vacquier (1985). A thin needlecontaining a heating wire provides a heat source; a thermistor in thesame needle monitors the thermal response with time. In the "full-space" configuration used for soft sediments, the core is allowed toequilibrate for several hours at room temperature. The needle is in-serted in a direction perpendicular to the long axis of the core, througha small hole drilled in the liner. A current is run through the heatingwire, inducing a temperature rise in the surrounding sediments. Therate of temperature rise is monitored with the thermistor and is directlyproportional to the thermal conductivity of the sediments.

When rocks are too hard for penetration of the needle, the "half-space" method is employed. A needle probe is mounted in a block oflow-conductivity epoxy. The surface of the epoxy is sanded down untilthe length of the needle is exposed. A rock sample at least as long asthe needle probe is selected after the core has been split, and allowedto equilibrate in a water bath. The smooth side of the sample is sandedand placed flush against the needle in the epoxy block, with the sample,block and needle submerged in water to maintain saturation andtemperature stability. The experiment is conducted as in the full-spacemode, except that a correction must be applied to account for thepresence of the epoxy block. In practice, corrections are determinedby comparing measured and known conductivities of a series ofstandard materials. Ideally, the range of conductivity standards extendsjust past the range of measured samples, so that the corrections neednot be extrapolated.

The half-space correction equation (specific for each block-needlepair) is of the form kc = A + Bkh, where kh is the uncorrectedconductivity, using a full-space analysis on data collected with ahalf-space apparatus, A is small and negative (roughly reflecting theconductivity of the epoxy base), and B is some value close to 2(reflecting mainly the geometry of the experiment) (Lee, 1989). Inpractice, the experiment is highly imperfect and these constants also

1 Hill, I.A., Taira, A, Firth, J.V., et al, 1993. Proc. ODP, Sci. Results, 131: CollegeStation, TX (Ocean Drilling Program).

2 Ocean Drilling Program, 1000 Discovery Drive, College Station, TX 77845, U.S.A.3 Centre de Brest, IFERMER, B.YP. 70 F29263 Plouzane Cedex, France.4 Earthquake Research Institute, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo

113, Japan.5 Pacific Geoscience Centre, P.O. Box 6000, Sydney, B.C., V8L 4B2, Canada.

reflect shortcomings in the experimental method, including poorcontacts between the samples and needles, nonsymmetry of thesamples and standards, and positioning of the heater and thermistorslightly below the surface of the epoxy block.

Freshwater (0.61 W/m °C), fused silica (1.38 W/m °C), and Macorceramic (1.61 W/m °C) were used during Leg 131 as standards forneedle probe measurements. Many of the materials cored during thisleg had conductivities higher than that of the Macor, however, makingit necessary to calibrate the ODP instrument over a wider range. Duringthe cruise we also used a piece of massive basalt, recovered from a junkbasket after Hole 504B cleaning operations on Leg 111, as an additionalstandard. A subsample of this basalt was sent to the U.S. GeologicalSurvey (USGS) laboratory in Menlo Park for testing prior to Leg 131,but their divided-bar system was not operational at that time. We wereable to obtain an estimated conductivity of 1.93 W/m °C for this samplefrom the USGS needle probe system (which had been separatelycalibrated against their divided bar system), run in half-space mode;we used this value for calibrating the ODP instrument during Leg 131.After the cruise was completed, the conductivity of the basalt standardwas determined with greater accuracy to be 2.05 W/m °C using adivided-bar apparatus (C. Williams, pers. comm., 1990).

Half-space calibration constants were determined for each of threeneedle probes used during Leg 131 (labeled 1,4 and 9) by regressingthe measured against the known conductivities. New calibration curvesfor half-space measurements are presented in Figure 1, and recalcu-lated final values for measurements of Site 808 sediments and rocksare listed in Table 1 and plotted in Figure 2. The conductivities in thisreport reflect a reduction of l%-2% at conductivities below1.60 W/m°C and an increase of up to 6% at conductivities greater than2.30W/m°C in comparison to results published in Taira, Hill, Firth,et al. (1991). These changes affect only half-space measurements, asmaterials soft enough to test using full-space geometry had low enoughconductivities that the basalt standard was not needed. These changesdo not significantly affect inferences or interpretations presented inTaira, Hill, Firth, et al. (1991).

REFERENCES

Clark, S.P., 1966. Handbook of Physical Constants: Boulder (Geol. Soc. Am.).Lee, T.-C, 1989. Thermal conductivity measured with a line source between

two dissimilar media equals their mean conductivity. J. Geophys. Res.,94:12443-12447.

Ratcliffe, E.H., 1960. Thermal conductivities of fused and crystalline quartz.Brit. J. Appl. Phys., 7:276-297.

Taira, A., Hill, I., Firth, J. V., et al., 1991.Proc. ODP, Init. Repts., 131:CollegeStation, TX (Ocean Drilling Program).

Vacquier, V., 1985. The measurement of thermal conductivity of solids with atransient linear heat source on the plane surface of a poorly conductingbody. Earth Planet. Sci Lett., 74:275-279.

Von Herzen, R.P., and Maxwell, A.E., 1959. The measurement of thermalconductivity of deep-sea sediments by a needle probe method. J. Geophys.Res., 65:1557-1563.

Date of initial receipt: 21 June 1991Date of acceptance: 25 March 1992Ms 131SR-138

451

DATA REPORT

Table 1. Corrected thermal conductivity data, Leg 131. Table 1 (continued).

Hole-core-sec.

808A-1H-1808A-1H-1808A-1H-2808A-1H-2808A-1H-3808A-1H-3808A-1H-4808A-1H-4808A-2H-1808A-2H-3808A-2H-5808A-2H-6808A-2H-7808A-3H-1808A-3H-1808A-3H-2808A-3H-3808A-3H-3808A-3H-4808A-3H-5808A-3H-6808A-4H-1808A-4H-1808A-4H-2808A-4H-2808A-4H-3808A-5H-6808A-6H-1808A-6H-1808A-7H-1808A-7H-1808A-7H-2808A-7H-3808A-7H-4808A-7H-4808A-7H-5808A-7H-6808A-9H-2808A-9H-3808A-9H-4808A-13H-18O8A-13H-2808B-2X-1808B-2X-1808B-4X-1808B-4X-1808B-5X-1oUorS-jA-ZÖUÖD- /A-1

808B-7X-2808B-7X-3808B-7X-4808B-7X-4808B-9X-2808B-9X-2808B-9X-4808B-10X-1808B-10X-1808B-10X-2808B-10X-2808B-10X-3808B-10X-3808B-10X-4808B-10X-4808B-11X-1808B-11X-42808B-11X-2808B-11X-3808B-13X-1808B-13X-1808B-13X-2808B-13X-2808B-16X-1808B-17X-1808B-17X-2808B-17X-2808B-17X-3

Int topa

(cm)

5510555

10550

10050

10012210721864450

1005050

1001590502595309050

1002490509025

11310901820

11010935126525652070232590

105301560156540359510

13025

12535

1054842861648914082457389

10913

Depth(mbsf)

0.551.052.052.553.504.005.005.507.52

10.3712.5114.6615.7416.3016.8017.7019.2019.7020.3522.6023.7025.5526.2527.1027.7028.3340.7244.5445.2054.3054.7055.5557.8858.3559.1559.9361.2870.9072.3973.15

106.52107.89120.85121.25140.10140.60149.73150.78169.70171.35172.10173.35173.80189.85190.35193.10197.75198.35199.00200.20200.65201.65202.25202.95207.28208.72209.16209.96226.28226.71227.70228.12254.85264.10265.76265.96266.50

k b

(W/m•°C)

1.051.041.071.061.190.981.240.960.890.811.010.910.860.900.870.810.940.750.850.850.950.940.870.930.920.851.001.120.881.221.060.861.030.830.730.751.191.051.130.980.930.890.970.921.061.291.091.061.101.151.061.311.091.111.131.241.141.091.381.071.071.051.191.221.081.111.050.961.231.201.401.101.37

(W/m °C)

1.451.281.311.34

(W/m•°C)

1.071.061.091.081.211.001.270.980.910.831.030.930.870.920.880.820.960.770.860,870.970.950.880.950.940.861.021.140.901,241.080.881.050.850.740.771.221.071.151.000.950.910.990.941.081.321.121.091.131.191.091.341.121.141.161.281.171.121.43i.101.101.081.221.251.121.141.080.991.271.231.441.131.411.501.311.35

Hole-core-sec.

808B-17X-3808B-17X-4808B-17X-4808B-19X-1808B-19X-1808B-19X-2808B-19X-2808B-19X-2808B-19X-3808B-20X-1808B-20X-1808B-20X-CC808C-1R-1808C-1R-1808C-1R-2808B-22X-1808C-3R-1808B-24X-1808C-4R-1808C-4R-1808B-24X-2808B-24X-2808B-24X-3808B-24X-3808C-5R-1808B-25X-4808B-25X-4808C-6R-1808C-6R-2808C-6R-3808B-28X-CC808B-28X-CC808C-7R-1808C-8R-2808C-9R-18O8C-1OR-1808C-10R-2808C-11R-1808C-11R-2808C-12R-1808C-12R-2808C-12R-3808C-12R-4808C-13R-1808C-13R-28O8C-13R-38O8C-13R-CC808C-14R-1808C-14R-2808C-14R-3808C-14R-4808C-15R-1808C-15R-2808C-15R-2808C-15R-3808C-15R-4808C-15R-5808C-16R-1808C-16R-2808C-16R-3808C-16R-4808C-16R-5808C-17R-1808C-17R-2808C-17R-3808C-17R-4808C-17R-5808C-18R-1808C-18R-28O8C-18R-3808C-18R-4808C-18R-5808C-19R-1808C-19R-2808C-19R-3808C-19R-4808C-19R-5

Int topa

(cm)

557

5510513056

1011272725

1263379

10340

1367524456545

105758716509523

1157211204414

10417

1109515

1201509335

145122105

4113

53623103

10712354139135186

51223147671247

124979893138

886210

Depth(mbsf)

266.92267.94268.45283.55283.77284.56285.01285.24285.77288.11289.13290.00299.26299.50300.40308.46318.35326.62327.65327.85328.35328.95330.15330.25337.06341.00341.45346.83349.25350.32355.31355.40356.61367.51376.61385.34387.77395.75396.45405.80407.60408.53409.45415.75417.02418.35419.34425.13425.55427.36428.73433.80435.23436.27437.93438.74439.83443.91444.85446.15447.53449.48452.89454.48456.14457.80458.75462.84465.11466.34467.85469.30472.10473.55475.85477.09478.07

k f(W/m °C)

1.26

1.181.18

1.18

1.321.251.12

1.391.37

1.311.33

K(W/m °C)

1.331.381.45

1.50

1.43

1.491.601.491.491.551.671.511.61.481.631.66

1.371.56

1.631.411.50

1.631.511.281.491.591.541.521.421.561.501.541.471.521.681.641.551.381.561.561.511.671.711.691.531.591.491.651.571.621.391.691.631.541.691.611.641.641.671.461.541.341.581.611.611.42

kcd

(W/m °C)

1.371.431.491.301.551.221.221.481.221.541.651.541.541.601.731.561.651.541.681.721.361.301.161.411.621.451.421.701.471.551.361.381.701.571.331.551.651.601.591.471.621.561.601.531.581.751.701.621.431.631.631.571.741.791.761.601.661.551.721.631.691.451.761.701.611.771.681.711.711.741.531.611.401.651.681.681.49

452

DATA REPORT

Table 1 (continued). Table 1 (continued).

Hole-core-sec.Int topa

(cm)Depth(mbsf) (W/m °C) (W/m °C)

kc(W/m °C) Hole-core-sec.

Int topa

(cm)Depth kf

(mbsf) (W/m °C) h(W/m °C) (W/m °C)

808C-20R-1808C-20R-2808C-20R-3808C-20R-4808C-20R-5808C-21R-1808C-21R-2808C-21R-4808C-21R-5808C-22R-1808C-22R-2808C-22R-2808C-22R-3808C-22R-4808C-22R-5808C-23R-1808C-23R-28O8C-23R-3808C-23R-4808C-23R-5808C-24R-1808C-24R-2808C-24R-3808C-24R-4808C-25R-1808C-25R-2808C-25R-3808C-26R-1808C-26R-2808C-26R-3808C-26R-4808C-26R-5808C-27R-1808C-27R-2808C-27R-3808C-27R-4808C-27R-5808C-27R-6808C-28R-1808C-28R-2808C-28R-3808C-28R-4808C-28R-5808C-29R-2808C-29R-3808C-29R-4808C-29R-5808C-29R-6808C-29R-7808C-30R-1808C-30R-28O8C-3OR-3808C-30R-4808C-30R-5808C-31R-1808C-31R-2808C-32R-1808C-32R-2808C-32R-3808C-32R-4808C-32R-5808C-32R-6808C-33R-1808C-33R-28O8C-33R-3808C-33R-4808C-34R-1808C-34R-2808C-34R-4808C-34R-58O8C-35R-1808C-35R-2808C-35R-3808C-35R-5808C-36R-3808C-36R-5808C-37R-1

392249

121938623725210121237

11028

1028650121673404045

11890781317902826292232121195491627

1031958314543

1208

1138

3051953026

116125

1122850161

10626

1441

1267063

1181

8651

124

482.06483.39485.16487.38488.60492.13493.00496.52497.82501.10502.62502.62504.37506.60507.28511.72513.06514.20515.32516.86521.03522.20523.70525.25531.18532.40533.75539.80541.33543.56544.45545.93549.56550.99552.59553.89555.38557.72559.36560.53562.14564.40565.06570.10571.33572.97573.53575.79576.17579.40579.85581.57583.28585.22587.90589.36598.46598.92600.35602.92603.58605.30607.06608.41610.96611.66617.94618.01622.26623.20626.83628.88629.21633.06638.95641.91646.74

1.661.591.591.571.741.541.761.501.361.441.251.401.401.441.561.531.601.551.751.571.591.631.521.531.541.651.551.491.521.621.531.571.521.631.661.591.571.691.601.741.751.581.641.661.571.801.581.621.691.501.541.721.641.901.681.731.741.351.511.421.671.751.641.761.641.121.631.581.161.811.441.651.561.381.511.651.48

.73

.66

.66

.64

.82

.62

.84

.57

.42

.51

.31

.46

.47

.51

.63

.60

.68

.63

.84

.65

.67

.71

.60

.60

.62

.73

.63

.56

.60

.69

.60

.64

.59

.71

.75

.67

.65

.78

.69

.83

.84

.66

.72

.75

.65

.89

.66

.70

.77

.58

.62

.80

.73

.99

.77

.82

.83

.42

.59

.49

.76

.84

.73

.85

.73

.18

.72

.66

.22

.90

.52

.74

.64

.45

.59

.74

.56

808C-37R-2808C-38R-1808C-38R-2808C-38R-3808C-38R-4808C-38R-5808C-38R-6808C-39R-1808C-39R-28O8C-39R-3808C-39R-4808C-39R-5808C-40R-1808C-40R-2808C-41R-1808C-41R-2808C-42R-1808C-42R-2808C-42R-3808C-42R-4808C-42R-5808C-42R-6808C-43R-1808C-43R-2808C-43R-3808C-43R-4808C-43R-5808C-43R-6808C-44R-1808C-44R-2808C-44R-4808C-44R-6808C-45R-1808C-45R-2808C-45R-4808C-45R-5808C-46R-2808C-46R-4808C-46R-5808C-47R-1808C-47R-2808C-47R-3808C-47R-5808C-47R-6808C-47R-7808C-48R-1808C-48R-2808C-48R-3808C-48R-4808C-48R-5808C-49R-1808C-49R-2808C-49R-3808C-49R-5808C-50R-1808C-50R-2808C-50R-3808C-50R-48O8C-5OR-5808C-50R-7808C-51R-1808C-51R-2808C-51R-3808C-51R-4808C-51R-5808C-51R-6808C-52R-1808C-52R-2808C-52R-3808C-52R-4808C-52R-5808C-52R-6808C-53R-1808C-53R-28O8C-53R-3808C-53R-4808C-53R-5

751819

119197

55416

1234737

1069

264

2320

1092947

9370

101125131861230

11223

140137

1876

1171231293332

10075204841

161447297

11514159

64

1254

1028443

117539052

8554

2532

11728

113302116

647.75655.05656.56659.06659.56660.94662.92664.88666.03668.70669.44670.84675.23675.76684.03685.31693.70695.17697.56698.26699.51701.04704.10705.37707.18708.92710.48711.53712.49714.17718.02720.13723.40724.87726.68728.76734.37737.43738.99741.73743.00745.18747.93748.88749.86751.51752.61754.71756.04757.82761.67763.35765.11767.29770.43771.13773.84774.13776.61779.43780.50782.74783.60785.47786.59787.65790.32791.31793.02794.59796.94797.55800.50801.17802.58804.03805.65

1.721.711.401.651.701.491.141.561.511.631.821.471.701.591.601.501.651.461.571.401.491.401.591.901.591.661.611.711.501.681.521.511.601.511.541.701.601.641.181.371.441.471.601.501.661.411.501.591.551.471.521.591.661.651.671.671.441.551.431.651.481.621.361.511.521.491.381.471.521.531.501.701.671.541.241.471.55

1.821.801.471.741.791.581.201.651.591.721.921.551.801.681.691.591.741.551.661.491.581.481.682.011.681.761.701.811.591.771.621.601.701.601.631.801.691.741.251.461.531.561.691.591.761.501.591.691.641.571.621.681.761.751.781.781.541.641.521.751.581.721.451.601.621.591.471.561.621.621.601.811.771.641.321.561.65

453

DATA REPORT

Table 1 (continued). Table 1 (continued).

Hole-core-sec.Int topa

(cm)Depth(mbsf) (W/m °C) (W/m•°C)

V(W/m °C) Hole-core-sec.

Int topa

(cm)Depth(mbsf) (W/m °C) (W/m °C)

K(W/m °C)

808C-54R-1808C-54R-2808C-54R-3808C-54R-4808C-54R-5808C-54R-6808C-55R-1808C-55R-4808C-56R-1808C-56R-2808C-56R-3808C-56R-4808C-56R-5808C-57R-1808C-57R-2808C-57R-4808C-57R-5808C-58R-1808C-58R-3808C-59R-1808C-59R-2808C-59R-3808C-59R-4808C-60R-1808C-60R-2808C-60R-3808C-60R-5808C-61R-1808C-61R-2808C-61R-4808C-61R-5808C-62R-1808C-62R-2808C-62R-3808C-62R-4808C-62R-5808C-63R-1808C-63R-2808C-63R-3808C-64R-1808C-64R-2808C-64R-3808C-64R-4808C-65R-1808C-65R-1808C-66R-1808C-66R-2808C-66R-3808C-66R-4808C-68R-1808C-70R-1808C-70R-2808C-70R-4808C-70R-5808C-71R-1808C-71R-3808C-72R-1808C-72R-2808C-72R-3808C-72R-CC808C-73R-1808C-73R-2808C-73R-3808C-73R-4808C-73R-5808C-73R-6808C-74R-1808C-74R-2808C-75R-1808C-75R-2808C-76R-1808C-76R-2808C-76R-3808C-76R-4808C-76R-5808C-76R-6808C-77R-1

14330

64

3513935

69

606

423

23279717

122497647

81837

130105

122218

10913313050

10531

1028745

89284

11211

135133

13966724

1436046

1141

1233

1139

193462880104

142139

1238

13713191628

4136

810.50810.87812.13813.61815.42817.96819.05823.26828.49830.50831.46833.32834.43838.33839.87843.57844.27848.62850.89857.86859.07860.18861.78867.17869.60869.90872.85876.59878.19881.07883.48887.40888.87889.57891.62892.38896.79898.14899.22905.56907.89909.31911.09915.18916.42926.10926.40928.73929.93944.44964.83965.50968.36969.41974.51976.22983.13984.31987.19989.08993.00994.03995.35997.37998.17999.611003.191004.661011.391013.101021.841022.101023.661025.131026.751028.011031.23

1.481.601.221.391.56i.711.641.701.741.671.631.611.891.721.761.511.791.721.741.681.731.741.711.631.731.561.671.601.741.682.001.691.6S1.761.771.761.691.711.891.66.77.64

1.64.70.83.76

1.85.75.88

1.671.721.661.60I.S21.681.761.641.761.901.831.711.781.661.891.791.781.741.761.681.771.641.811.821.921.771.851.78

1.581.701.301.481.661.821.751.811.851.781.731.722.011.831.871.621.901.831.851.801.841.861.831.741.851.661.781.711.861.802.141.801.801.891.891.881.811.832.031.771.891.761.761.821.961.891.981.882.011.791.851.791.721.951.811.891.761.902.051.961.841.911.792.031.931.911.871.901.811.911.771.951.962.071.911.991.92

808C-77R-2808C-77R-3808C-77R-4808C-77R-5808C-78R-1808C-78R-2808C-78R-3808C-78R-4808C-78R-5808C-79R-1808C-79R-2808C-79R-3808C-79R-4808C-80R-1808C-80R-28O8C-8OR-3808C-81R-1808C-81R-2808C-82R-1808C-82R-1808C-83R-1808C-83R-3808C-84R-1808C-84R-2808C-85R-1808C-85R-1808C-86R-1808C-86R-1808C-86R-CC808C-89R-1808C-89R-2808C-90R-1808C-91R-1808C-91R-1808C-92R-1808C-92R-CC808C-93R-1808C-94R-1808C-94R-2808C-95R-1808C-95R-1808C-100R-18O8C-1OOR-2808C-101R-1808C-101R-2808C-101R-3808C-101R-4808C-101R-5808C-102R-1808C-102R-2808C-102R-3808C-102R-3808C-103R-1808C-103R-2808C-103R-3808C-103R-CC808C-104R-1808C-104R-2808C-105R-1808C-105R-1808C-106R-1808C-106R-1808C-106R-2808C-106R-2808C-107R-1808C-107R-1808C-107R-1808C-107R-

393467

74332

588

138145125603789

5399033401934

1132

466

551

46775693

142121

107411858

1358826

104101

1859

4128

13450724892

11

12911612471

1114

86363659

189

1031.761033.211035.041035.941039.501040.891042.121044.451046.451048.441050.311051.551053.401058.171060.191060.851067.491069.501076.831076.901085.961089.111092.011094.821098.341098.961108.051108.051111.391137.031138.841146.831156.801157.291165.691167.411176.341185.311186.581195.181195.951243.851244.731253.211254.681255.361257.261258.211262.781263.011264.841265.001271.621272.881274.821275.581280.411283.191291.031291.111299.781300.181300.491301.311308.631308.631308.861309.16

1.81

1.57

1.88

1.73

1.80

1.86

1.74

1.86

1.75

1.75

1.80

1.77

1.75

1.80

1.93

1.78

1.68

1.73

1.76

1.76

1.72

1.84

1.81

1.90

1.66

1.77

1.57

1.58

1.86

1.66

2.00

1.95

1.81

1.87

1.91

1.90

1.73

1.85

1.85

1.76

1.86

1.86

2.02

1.67

1.77

1.37

1.96

1.79

2.03

2.16

1.50

1.52

1.83

2.12

1.49

2.09

1.95

2.13

1.67

1.80

1.64

1.90

1.69

1.74

1.76

1.71

1.61

1.77

1.95

1.70

2.02

1.87

1.94

2.01

1.87

2.01

1.88

1.89

1.94

1.91

1.89

1.94

2.08

1.92

1.81

1.86

1.91

1.90

1.87

1.98

1.96

2.06

1.80

1.91

1.70

1.71

2.02

1.80

2.16

2.11

1.97

2.03

2.08

2.06

1.88

2.02

2.01

1.92

2.03

2.03

2.20

1.83

1.93

1.50

2.14

1.95

2.22

2.36

1.64

1.66

2.00

2.31

1.63

2.28

2.14

2.33

1.83

1.47

1.79

2.08

1.85

1.90

1.93

1.87

1.77

1.93

aDistance, in centimeters, from the top of the section to the measurement position (forfull-space measurements) or to the top of the measurement interval (for half-spacemeasurements).

bFull-space thermal conductivity, uncorrected for in-situ conditions (unchanged fromTaira, Hill, Firth et al., 1991).

cHalf-space thermal conductivity, uncorrected for in-situ conditions (corrected from Taira,Hill, Firth et al., 1991, using new basalt standard).

dThermal conductivity (either full-space or half-space) corrected to in-situ conditions(Ratcliffe, 1960; Clark, 1966), as described in Taira, Hill, Firth, et al. (1991).

454

DATA REPORT

oo

E

1.1

1.0

° 9

-σ 0.8

sreS• 0.7I

0.6

0.5

= -° 0 2 + 2 1 0 k

1.3 1.4 1.5 1.6 1.7 1.8

True conductivity (W/m °C)

1.9 2.0 2.1

Figure 1. Measured and known thermal conductivities of half-space standards used during Leg 131. There are dataand curves for each of the three half-space needle probes used during the leg. Measured values are means of atleast 10 individual measurements with each standard, with error bars indicating one standard deviation. The linesare least-squares best fits, defined by the equations shown, which were used in this report to correct all half-spacemeasurements.

455

DATA REPORT

Thermal conductivity (W/m °C)

0.5 1.0 1.5 2.0 2.5

200

400

600

ε

Q.ΦQ

800

1000

1200

•it •*•

SW"•*

•,•*

— ηΛ

•

•

*

• •» ....JI

••

*••

* * f *... /«' ...%•z%

• •.•*

•

•*5** \

i» *

:v

•

" r

**!?••

• \°m *

, J5

1

•

••V.

• *•

•

M -

. 9

• . *

I1400

Figure 2. Corrected thermal conductivities for all measurements made at Site808 during Leg 131.

456