Garnet in the Earth's Mantle

被引：56
|
作者：
Wood, Bernard J. [1 ]
Kiseeva, Ekaterina S. [1 ]
Matzen, Andrew K. [1 ]
机构：
[1] Univ Oxford, Dept Earth Sci, Oxford OX1 3AN, England
来源：
ELEMENTS | 2013年 / 9卷 / 06期
基金：
欧洲研究理事会;
关键词：
phase transformations; garnet; mantle peridotite; eclogite; diamond inclusions; majorite; PHASE-TRANSFORMATIONS; MIDOCEAN RIDGES; PERIDOTITE; CONSTRAINTS; TRANSITION; MODEL; PARTITION; XENOLITHS; BENEATH; REGION;
D O I：
10.2113/gselements.9.6.421
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Aluminous garnet, (Mg,Fe-2+,Ca)(3)(AI,Cr)(2)Sl(3)O(12), is an important constituent of mantle peridotite (similar to 10%) and of the other abundant upper mantle rock, eclogite (similar to 50%). Its unusual crystal chemistry means that it strongly prefers some trace elements and confers a "garnet signature" on mantle melts. As depth increases from 250 to 600 km, garnet increases in abundance in mantle rocks, dissolving large fractions of the other silicates and becoming Si rich (majoritic). These compositional changes are observed in some garnets found as inclusions in diamond. Garnet disappears from mantle assemblages at about 700 km depth, where it is replaced by an even denser silicate, perovskite.
引用
收藏
页码：421 / 426
页数：6
相关论文
共 50 条
  • [1] Phase transformations between garnet and perovskite phases in the Earth's mantle:: A theoretical study
    Vitos, L.
    Magyari-Kope, B.
    Ahuja, R.
    Kollar, J.
    Grimvall, G.
    Johansson, B.
    [J]. PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 2006, 156 (1-2) : 108 - 116
  • [2] An experimental investigation of the stability of majoritic garnet in the Earth's mantle and an improved majorite geobarometer
    Wijbrans, C. H.
    Rohrbach, A.
    Klemme, S.
    [J]. CONTRIBUTIONS TO MINERALOGY AND PETROLOGY, 2016, 171 (05)
  • [3] An experimental investigation of the stability of majoritic garnet in the Earth’s mantle and an improved majorite geobarometer
    C. H. Wijbrans
    A. Rohrbach
    S. Klemme
    [J]. Contributions to Mineralogy and Petrology, 2016, 171
  • [4] The Earth's mantle
    Helffrich, GR
    Wood, BJ
    [J]. NATURE, 2001, 412 (6846) : 501 - 507
  • [5] The Earth's mantle
    George R. Helffrich
    Bernard J. Wood
    [J]. Nature, 2001, 412 : 501 - 507
  • [6] A curved post-garnet boundary enhances slab and plume dynamics in the Earth’s mantle
    [J]. Nature Geoscience, 2023, 16 : 766 - 767
  • [7] A curved post-garnet boundary enhances slab and plume dynamics in the Earth's mantle
    Ishii, Takayuki
    Katsura, Tomoo
    [J]. NATURE GEOSCIENCE, 2023, 16 (09) : 766 - 767
  • [8] Elastic properties of majoritic garnet inclusions in diamonds and the seismic signature of pyroxenites in the Earth's upper mantle
    Koemets, Iuliia
    Satta, Niccolo
    Marquardt, Hauke
    Kiseeva, Ekaterina S.
    Kurnosov, Alexander
    Stachel, Thomas
    Harris, Jeff W.
    Dubrovinsky, Leonid
    [J]. AMERICAN MINERALOGIST, 2020, 105 (07) : 984 - 991
  • [9] The Earth's mantle remodelled
    Ross Angel
    [J]. Nature, 1997, 385 : 490 - 491
  • [10] Water in the Earth's mantle
    Bolfan-Casanova, N
    [J]. MINERALOGICAL MAGAZINE, 2005, 69 (03) : 229 - 257
12345