Characteristic time of thermal and diffusional relaxation

Authors

  • O. Aryasova S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
  • Ya. Khazan S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Kyiv, Ukraine

DOI:

https://doi.org/10.24028/gzh.0203-3100.v37i6.2015.111174

Keywords:

characteristic time, thermal relaxation

Abstract

It is shown that frequently used dimensional estimation of a layer thermal relaxation time, tr, as L2/κ based on the layer thickness, L, and thermal diffusivity, κ, strongly overestimates tr. The correct estimate tr=L22κ should contain a factor of 1/π2 which is of the order of 0.1.

References

Artemieva I. M., 2009. The continental lithosphere: Reconciling thermal, seismic, and petrologic data. Lithos 109(12), 23—46.

Hirth G., Kohlstedt D. L., 2003. Rheology of the upper mantle and the mantle wedge: A view from the experimentalists. In: Inside the Subduction Factory. Vol. 138. Geophys. Monogr. Ser. Р. 83—105.

Khazan Yа. M., Aryasova O. V., 2014. Stability of the boundary layer between the lithosphere and convecting mantle and the steady-state lithospheric geotherm. Izvestiya, Physics of the Solid Earth. 50(4), 543—561.

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Published

2015-12-01

How to Cite

Aryasova, O., & Khazan, Y. (2015). Characteristic time of thermal and diffusional relaxation. Geofizičeskij žurnal, 37(6), 99–104. https://doi.org/10.24028/gzh.0203-3100.v37i6.2015.111174

Issue

Section

Scientific Reports