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Optical absorption and radiative heat transport in olivine at high temperatureResults are presented of measurements of the optical absorption spectra (300-8000 nm) of olivine as a function of temperature (300-1700 K) under conditions of controlled and known oxygen fugacity within the stability field of the samples. The absorption spectra are used to calculate the temperature-dependent radiative transfer coefficient of olivine and to numerically study the accuracy of the method. The present absorption measurements in olivine under oxidizing conditions known to be within the olivine stability field indicate that the effective radiative conductivity K(R) is lower than that obtained in previous studies under different experimental conditions. The lower value of K(R) makes it more likely that some of the earth's internal heat is removed by convection and less likely that thermal models involving conduction and radiation alone will satisfactorily explain thermal conditions in the earth's mantle.
Document ID
19790049939
Document Type
Reprint (Version printed in journal)
Authors
Shankland, T. J.
(Los Alamos Scientific Lab. NM, United States)
Nitsan, U.
(California, University Los Alamos Scientific Laboratory, Los Alamos, N. Mex., United States)
Duba, A. G.
(California, University Lawrence Livermore Laboratory, Livermore, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
April 10, 1979
Publication Information
Publication: Journal of Geophysical Research
Volume: 84
Subject Category
Geosciences (General)
Accession Number
79A33952
Funding Number(s)
CONTRACT_GRANT: NSF GA-43261
CONTRACT_GRANT: NSF GH-33576
Distribution Limits
Public
Copyright
Other

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