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

Authors
da Silva, CRS Wentzcovitch, RM Patel, A Price, GD Karato, SI
Citation
Crs. Da Silva et al., The composition and geotherm of the lower mantle: constraints from the elasticity of silicate perovskite, PHYS E PLAN, 118(1-2), 2000, pp. 103-109
Citations number
54
Categorie Soggetti
Earth Sciences
Journal title
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
ISSN journal
00319201 → ACNP
Volume
118
Issue
1-2
Year of publication
2000
Pages
103 - 109
Database
ISI
SICI code
0031-9201(200002)118:1-2<103:TCAGOT>2.0.ZU;2-3
Abstract
A newly developed parameterization of the third-order isentropic finite str ain equation of states (EOS) is used in conjunction with experimental data and theoretical results on MgSiO3 perovskite. New geotherms for the lower m antle are derived by comparison with preliminary reference earth model (PRE M). The geotherms are adiabatic up to 1500 km depth and super-adiabatic the reafter. A description of the critical steps in obtaining the new parameter ization is also given. (C) 2000 Elsevier Science B.V. All rights reserved.