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Table 4 Regression coefficients of multiple regression models of the variable λm for air- and water-saturated sandstones

From: Pore-fluid-dependent controls of matrix and bulk thermal conductivity of mineralogically heterogeneous sandstones

Pore fluid Variable/predicator Coefficient Standard error t value p value R 2
Air Intercept 1.74 0.56 3.11 2.22 × 10−3 0.65
Porosity 0.079 0.010 7.85 4.66 × 10−13
Quartz 0.0410 0.0057 7.18 2.12 × 10−11
Alkali feldspar − 0.044 0.014 − 3.22 1.55 × 10−3
Kaolinite 0.117 0.026 4.46 1.48 × 10−5
Dolomite 0.0226 0.0086 2.64 8.99 × 10−3
Water Intercept 1.53 0.37 4.08 6.97 × 10−5 0.72
Porosity 0.022 0.0065 3.31 1.15 × 10−3
Quartz 0.048 0.0038 12.54 2.0 × 10−16
Alkali feldspar − 0.023 0.0090 − 2.51 1.31 × 10−2
Kaolinite 0.055 0.017 3.26 1.36 × 10−3
Dolomite 0.025 0.0056 4.51 1.23 × 10−5
Siderite − 0.29 0.12 − 2.51 1.30 × 10−2