EFFECT OF PRESSURE ON THE COMPOSITION OF THE LOWER MANTLE END MEMBER FEXO

被引：44
|
作者：
MCCAMMON, C
机构：
[1] Bayerisches Geoinstitut, W-8580 Bayreuth
来源：
SCIENCE | 1993年 / 259卷 / 5091期
关键词：
D O I：
10.1126/science.259.5091.66
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The composition limits of Fe(x)O are sensitive to both pressure and temperature. Earlier studies have shown that Fe(x)O becomes highly nonstoichiometric when in equilibrium with metallic iron above 10 gigapascals, which is difficult to reconcile with available thermodynamic data. Experiments with a uniaxial split-sphere apparatus demonstrate that the iron content of Fe(x)O increases continuously at high pressure in excellent agreement with quantitative models and suggest that there is a discontinuity in the elastic properties of Fe(x)O above x = 0.95. On the basis of these results, it is inferred that the Earth's present lower mantle is not in equilibrium with metallic iron.
引用
收藏
页码：66 / 68
页数：3
相关论文
共 50 条
  • [1] COMPOSITION LIMITS OF FEXO AND THE EARTHS LOWER MANTLE
    JEANLOZ, R
    HAZEN, RM
    [J]. SCIENCE, 1993, 261 (5123) : 923 - 924
  • [2] COMPOSITION LIMITS OF FEXO AND THE EARTHS LOWER MANTLE - REPLY
    MCCAMMON, C
    [J]. SCIENCE, 1993, 261 (5123) : 924 - 925
  • [3] Effect of composition and pressure on phase transitions in FexO at low temperature
    Glazyrin, K.
    Dubrovinsky, L.
    Klotz, S.
    Uhlarz, M.
    Wosnitza, J.
    Hansen, Th
    Dubrovinskaia, N.
    [J]. JOURNAL OF APPLIED PHYSICS, 2011, 110 (02)
  • [4] Sensitivities of seismic velocities to temperature, pressure and composition in the lower mantle
    Trampert, J
    Vacher, P
    Vlaar, N
    [J]. PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 2001, 124 (3-4) : 255 - 267
  • [5] LOWER-MANTLE COMPOSITION - HIGH-PRESSURE MELTING STUDIES
    HERZBERG, C
    [J]. NATURE, 1987, 328 (6130) : 472 - 472
  • [6] Extrapolation of lower mantle properties to zero pressure: Constraints on composition and temperature
    Stacey, FD
    Isaak, DG
    [J]. AMERICAN MINERALOGIST, 2000, 85 (02) : 345 - 353
  • [7] Discriminating lower mantle composition
    Houser, C.
    Hernlund, J. W.
    Valencia-Cardona, J.
    Wentzcovitch, R. M.
    [J]. PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 2020, 308
  • [8] DENSITY AND COMPOSITION OF THE LOWER MANTLE
    JEANLOZ, R
    KNITTLE, E
    [J]. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1989, 328 (1599): : 377 - 389
  • [9] Effect of Doping on the Electronic Structure of the Earth's Lower Mantle Compounds: FeXO3 with X = C, Al, Si
    Chernov, Evgeniy D.
    Dyachenko, Alexey A.
    Lukoyanov, Alexey V.
    [J]. MATERIALS, 2022, 15 (03)
  • [10] The Composition of Earth's Lower Mantle
    Murakami, Motohiko
    Khan, Amir
    Sossi, Paolo A.
    Ballmer, Maxim D.
    Saha, Pinku
    [J]. ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES, 2024, 52 : 605 - 638
12345