Extended Data Table 2 Physical properties of materials used in the numerical experiments

From: Building cratonic keels in Precambrian plate tectonics

  1. The parameters used in the flow laws45 are: for wet quartzite AD = 10–3.5 MPa–n s–1, where n = 2.3 and E = 154,000 J mol−1; for plagioclase An75 – AD = 10–3.5 MPa–n s–1, where n = 3.2 and E = 238,000 J mol−1; for dry olivine AD = 104.4 MPa–n s–1, where n = 3.5 and E = 532,000 J mol−1; for wet olivine AD = 103.3 MPa–n s–1, where n = 4.0 and E = 470,000 J mol−1. ρ0 is density, k is thermal conductivity, Tsolidus, Tliquidus are the solidus and liquidus temperatures, Hr, HL are radiogenic and latent heat production, E is activation energy, n is the stress component, AD is the material constant, V is the activation volume, T is the temperature, P is the pressure; c0 and c1 are the initial and final compressive strengths; and γ0 and γ1 are the initial and final effective friction coefficients. The parameters used for all lithologies are: isobaric heat capacity Cp = 1,000 J kg−1 K−1, thermal expansion coefficient α = 3 × 10−5 K–1, and isothermal compressibility β = 10−3 MPa–1. Data are taken from refs. 45,46,48,83,84,85.
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