The composition and geotherm of the lower mantle: Constraints from the elasticity of silicate perovskite

Cesar R.S. Da Silva; R. M. Wentzcovitch; A. Patel; G. D. Price; S. I. Karato

doi:10.1016/S0031-9201(99)00133-8

The composition and geotherm of the lower mantle: Constraints from the elasticity of silicate perovskite

Cesar R.S. Da Silva, R. M. Wentzcovitch, A. Patel, G. D. Price, S. I. Karato

Materials Research Science & Engineering Center

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Abstract

A newly developed parameterization of the third-order isentropic finite strain equation of states (EOS) is used in conjunction with experimental data and theoretical results on MgSiO₃ perovskite. New geotherms for the lower mantle are derived by comparison with preliminary reference earth model (PREM). The geotherms are adiabatic up to 1500 km depth and super-adiabatic thereafter. A description of the critical steps in obtaining the new parameterization is also given.

Original language	English (US)
Pages (from-to)	103-109
Number of pages	7
Journal	Physics of the Earth and Planetary Interiors
Volume	118
Issue number	1-2
DOIs	https://doi.org/10.1016/S0031-9201(99)00133-8
State	Published - Feb 2000

Bibliographical note

Funding Information:
We wish to acknowledge computational resources from the Minnesota Supercomputer Institute, the National Science Foundation (award No. EAR 9628042 to RMW and xxxx to S.-i Karato), the Brazilian National Research Council (CNPq award to CRSS), and the British NERC (AP and GDP).

Keywords

Geotherm
Lower mantle
Silicate perovskite

UN SDGs

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abstract = "A newly developed parameterization of the third-order isentropic finite strain equation of states (EOS) is used in conjunction with experimental data and theoretical results on MgSiO3 perovskite. New geotherms for the lower mantle are derived by comparison with preliminary reference earth model (PREM). The geotherms are adiabatic up to 1500 km depth and super-adiabatic thereafter. A description of the critical steps in obtaining the new parameterization is also given.",

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AU - Patel, A.

AU - Price, G. D.

AU - Karato, S. I.

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The composition and geotherm of the lower mantle: Constraints from the elasticity of silicate perovskite

Abstract

Bibliographical note

Keywords

UN SDGs

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