Thermal properties of Matahina Ignimbrite

L. McGovern, Fiona Sanders, Michael D. Rosenberg, Anya M. Seward, Isabelle Chambefort & Rob H. Funnell
Thermal properties of a 140 m section of the Matahina Formation ignimbrite were determined from a rock core drilled near Rotorua, New Zealand. For this project, thermal conductivity, thermal diffusivity and specific heat capacity were determined using the divided-bar method in order to investigate interrelationships with density/porosity and lithological variation throughout the unit. Thermal conductivity ranged from 0.25 to 1.44 W/(m.K) for dry samples and 1.06 to 2.18 W/(m.K) for water-saturated samples. Specific heat capacity...
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