(Mg,Fe)SiO3-perovskite stability under lower mantle conditions

被引:71
作者
Serghiou, G [1 ]
Zerr, A [1 ]
Boehler, R [1 ]
机构
[1] Max Planck Inst Chem, D-55020 Mainz, Germany
关键词
D O I
10.1126/science.280.5372.2093
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
In three different experiments up to 100 gigapascals and 3000 kelvin, (Mg,Fe)SiO3-perovskite, the major component of the lower mantle, remained stable and did not decompose to its component oxides (Mg,Fe)O and SiO2. Perovskite was formed from these oxides when heated in a diamond anvil cell at pressures up to 100 gigapascals. Both MgSiO3 crystals and glasses heated to 3000 kelvin at 75 gigapascals also formed perovskite as a single phase, as evident from Raman spectre. Moreover, fluorescence measurements on chromium-doped samples synthesized at these conditions gave no indication of the presence of MgO.
引用
收藏
页码:2093 / 2095
页数:5
相关论文
共 18 条
[1]   HIGH-PRESSURE MELTING OF (MG,FE)SIO3-PEROVSKITE - REPLY [J].
BOEHLER, R ;
ZERR, A .
SCIENCE, 1994, 264 (5156) :280-281
[2]  
BOEHLER R, 1992, HIGH PRESSURE RES AP, P55
[3]   MATERIAL TRANSPORT IN LASER-HEATED DIAMOND ANVIL CELL MELTING EXPERIMENTS [J].
CAMPBELL, AJ ;
HEINZ, DL ;
DAVIS, AM .
GEOPHYSICAL RESEARCH LETTERS, 1992, 19 (10) :1061-1064
[5]  
Chopelas A, 1992, HIGH PRESSURE RES AP, P101
[6]  
Chopelas A., 1996, SPECIAL PUBLICATION, V5, P229
[7]   Experimental and theoretical identification of a new high-pressure phase of silica [J].
Dubrovinsky, LS ;
Saxena, SK ;
Lazor, P ;
Ahuja, R ;
Eriksson, O ;
Wills, JM ;
Johansson, B .
NATURE, 1997, 388 (6640) :362-365
[8]   Maximum solubility of FeO in (Mg, Fe)SiO3-perovskite as a function of temperature at 26 GPa: Implication for FeO content in the lower mantle [J].
Fei, YW ;
Wang, YB ;
Finger, LW .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 1996, 101 (B5) :11525-11530
[9]   HIGH-PRESSURE AND HIGH-TEMPERATURE INSITU X-RAY-OBSERVATION OF MGSIO3 PEROVSKITE UNDER LOWER MANTLE CONDITIONS [J].
FUNAMORI, N ;
YAGI, T .
GEOPHYSICAL RESEARCH LETTERS, 1993, 20 (05) :387-390