Инд. авторы:	Goncharov A.F., Lobanov S.S., Tan X., Hohensee G.T., Cahill D.G., Lin J.-F., Thomas S.-M., Okuchi T., Tomioka N.
Заглавие:	Experimental study of thermal conductivity at high pressures: Implications for the deep Earth's interior
Библ. ссылка:	Goncharov A.F., Lobanov S.S., Tan X., Hohensee G.T., Cahill D.G., Lin J.-F., Thomas S.-M., Okuchi T., Tomioka N. Experimental study of thermal conductivity at high pressures: Implications for the deep Earth's interior // Physics of the Earth and Planetary Interiors. - 2015. - Vol.247. - P.11-16. - ISSN 0031-9201. - EISSN 1872-7395.
Внешние системы:	DOI: 10.1016/j.pepi.2015.02.004; SCOPUS: 2-s2.0-84945484973; WoS: 000364884600003;
Реферат:	eng: Lattice thermal conductivity of ferropericlase and radiative thermal conductivity of iron bearing magnesium silicate perovskite (bridgmanite) - the major mineral of Earth's lower mantle- have been measured at room temperature up to 30 and 46GPa, respectively, using time-domain thermoreflectance and optical spectroscopy techniques in diamond anvil cells. The results provide new constraints for the pressure dependencies of the thermal conductivities of Fe bearing minerals. The lattice thermal conductivity of ferropericlase Mg0.9Fe0.1O is 5.7(6)W/(m*K) at ambient conditions, which is almost 10 times smaller than that of pure MgO; however, it increases with pressure much faster (6.1(7)%/GPa vs 3.6(1)%/GPa). The radiative conductivity of a Mg0.94Fe0.06SiO3 bridgmanite single crystal agrees with previously determined values for powder samples at ambient pressure; it is almost pressure-independent in the investigated pressure range. Our results confirm the reduced radiative conductivity scenario for the Earth's lower mantle, while the assessment of the heat flow through the core-mantle boundary still requires in situ measurements at the relevant pressure-temperature conditions. © 2015 Elsevier B.V.
Ключевые слова:	Calluna vulgaris; thermal conductivity; optical property; lower mantle; lattice dynamics; iron; high pressure; experimental study; diamond anvil cell; Thermal conductivity; Radiative conductivity; Lower mantle; Lattice thermal conductivity; High pressure; Ferropericlase; Deep earths; Bridgmanite; Time domain analysis; Single crystals; Silicates; Optical properties; Optical lattices; Minerals; Crystal lattices; Thermal conductivity; Radiative conductivity; Optical properties; Lower mantle; Lattice thermal conductivity; High pressure; Ferropericlase; Deep Earth's minerals; Bridgmanite;
Издано:	2015
Физ. характеристика:	с.11-16