Electrical conductivity of mantle peridotite at the uppermost lower mantle condition

被引：1

作者：

Yoshino, T. ^{[1
]}

Katsura, T. ^{[1
]}

Yamazaki, D. ^{[1
]}

Ito, E. ^{[1
]}

机构：

[1] Okayama Univ, Inst Study Earths Interior, Tottori 6821093, Japan

来源：

INTERNATIONAL CONFERENCE ON HIGH PRESSURE SCIENCE AND TECHNOLOGY, JOINT AIRAPT-22 AND HPCJ-50 | 2010年 / 215卷

关键词：

SILICATE PEROVSKITE; (MG; FE)(SI; AL)O-3; PEROVSKITE; CORE FORMATION; PHASE; MAGNESIOWUSTITE; ALUMINA;

D O I：

10.1088/1742-6596/215/1/012102

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Electrical conductivity of mantle peridotite was measured at 25 GPa and temperature up to 1800 K in a Kawai-type multi-anvil apparatus. The starting material was gel with a composition of fertile spinel lherzolite (KLB1). After the conductivity measurement, mineral phases of run products are composed of magnesium silicate perovskite, ferro-periclase and Ca perovskite. The conductivity value of the peridotite is distinctly higher than those of post-spinel and magnesian silicate perovskite with a composition of (Mg(0.9), Fe(0.1)) SiO(3), but lower than that of ferro-periclase. Both absolute values and change in activation enthalpy for the conductivity of the mantle peridotite are similar to those for the silicate perovskite. A presence of aluminous perovskite with substantial amount of ferric iron in crystal structure would enhance bulk conductivity of the lower mantle.

引用

页数：4

共 50 条

[1] MELTING OF PERIDOTITE AT UPPERMOST LOWER-MANTLE CONDITIONS
ITO, E
TAKAHASHI, E
[J]. NATURE, 1987, 328 (6130) : 514 - 517
[2] Structural geology of peridotite and rheology of the uppermost mantle
Michibayashi, Katsuyoshi
[J]. NIHON REOROJI GAKKAISHI, 2006, 34 (05) : 291 - 300
[3] Electrical conductivity of mantle clinopyroxene as a function of water content and its implication on electrical structure of uppermost mantle
Zhao, Chengcheng
Yoshino, Takashi
[J]. EARTH AND PLANETARY SCIENCE LETTERS, 2016, 447 : 1 - 9
[4] GEOMAGNETIC SOUNDING OF CONDUCTIVITY ANOMALIES IN THE LOWER CRUST AND UPPERMOST MANTLE
SINGH, BP
[J]. GEOPHYSICAL SURVEYS, 1980, 4 (1-2): : 71 - 87
[5] ELECTRICAL-CONDUCTIVITY OF THE EARTHS LOWER MANTLE
SHANKLAND, TJ
PEYRONNEAU, J
POIRIER, JP
[J]. NATURE, 1993, 366 (6454) : 453 - 455
[6] ELECTRICAL AND THERMAL-CONDUCTIVITY OF LOWER MANTLE
TOZER, DC
[J]. TRANSACTIONS-AMERICAN GEOPHYSICAL UNION, 1972, 53 (05): : 604 - &
[7] The heterogeneous electrical conductivity structure of the lower mantle
Tarits, Pascal
Mandea, Mioara
[J]. PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 2010, 183 (1-2) : 115 - 125
[8] ELECTRICAL-CONDUCTIVITY OF THE EARTHS LOWER MANTLE
PEYRONNEAU, J
POIRIER, JP
[J]. NATURE, 1989, 342 (6249) : 537 - 539
[9] Tomographic imaging of multiple mantle plumes in the uppermost lower mantle
Rhodes, M
Davies, JH
[J]. GEOPHYSICAL JOURNAL INTERNATIONAL, 2001, 147 (01) : 88 - 92
[10] NATURE OF THE LOWER CRUST AND UPPERMOST MANTLE
不详
[J]. JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA, 1988, 31 (04) : 447 - 447

← 1 2 3 4 5 →