Optical absorption and radiative thermal conductivity of silicate perovskite to 125 gigapascals.

@article{Keppler2008OpticalAA,
  title={Optical absorption and radiative thermal conductivity of silicate perovskite to 125 gigapascals.},
  author={Hans Keppler and Leonid Dubrovinsky and Olga Narygina and Innokenty Yu Kantor},
  journal={Science},
  year={2008},
  volume={322 5907},
  pages={1529-32}
}
Mantle convection and plate tectonics are driven by the heat flow from Earth's core to the surface. The radiative contribution to heat transport is usually assumed to be negligible. Here, we report the near-infrared and optical absorption spectra of silicate perovskite, the main constituent of the lower mantle, to 125 gigapascals. Silicate perovskite remains quite transparent up to the pressures at the core-mantle boundary. Estimates of radiative thermal conductivity derived from these spectra… CONTINUE READING
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