scholarly journals Ultrasonic Velocity of Diopside Liquid at High Pressure and Temperature: Constraints on Velocity Reduction in the Upper Mantle Due to Partial Melts

2018 ◽  
Vol 123 (10) ◽  
pp. 8676-8690 ◽  
Author(s):  
Man Xu ◽  
Zhicheng Jing ◽  
Julien Chantel ◽  
Peixiu Jiang ◽  
Tony Yu ◽  
...  
Keyword(s):  
High Pressure ◽  
Ultrasonic Velocity ◽  
Upper Mantle ◽  
High Pressure And Temperature ◽  
Velocity Reduction ◽  
Partial Melts

High-pressure, synthetic loveringite-davidite and its rare earth element geochemistry

1987 ◽  
Vol 51 (359) ◽  
pp. 145-149 ◽  
Author(s):  
T. H. Green ◽  
N. J. Pearson
Keyword(s):  
High Pressure ◽  
Rare Earth ◽  
Rare Earth Element ◽  
Basaltic Andesite ◽  
Upper Mantle ◽  
Partition Coefficients ◽  
Earth Element ◽  
Element Geochemistry ◽  
High Pressure And Temperature ◽  
The Stability

AbstractLoveringite-davidite members of the crichtonite group were synthesized at high pressure and temperature (7.5 kbar, 1000–1050 °C) from a melt of TiO2 and rare earth element (REE) enriched basaltic andesite composition. Four sets of partition coefficients for La, Srn, Ho, Lu and Sr (analogue for Eu2+) were obtained. These show that light and heavy REE are readily accommodated, but the intermediate REE are discriminated against in the loveringite—davidite structure. This confirms the previously proposed two sites (A and M) for REE substitution in the crichtonite group. Additional experiments verified the stability of REE-rich crichtonite group minerals to 20 kbar, 1300 °C and 30 kbar, 1000 °C, and indicate that this phase may be an important accessory repository for the light and heavy REE in the upper mantle.

High pressure and temperature fabric transitions in olivine and variations in upper mantle seismic anisotropy

2011 ◽  
Vol 304 (1-2) ◽  
pp. 55-63 ◽  
Author(s):  
Tomohiro Ohuchi ◽  
Takaaki Kawazoe ◽  
Yu Nishihara ◽  
Norimasa Nishiyama ◽  
Tetsuo Irifune
Keyword(s):  
High Pressure ◽  
Upper Mantle ◽  
Seismic Anisotropy ◽  
High Pressure And Temperature

Melt migration and melt-rock reactions in the deforming Earth’s upper mantle: Experiments at high pressure and temperature

Geology ◽  
2014 ◽  
Vol 42 (1) ◽  
pp. 83-86 ◽  
Author(s):  
Vincent Soustelle ◽  
Nicolas P. Walte ◽  
M.A. Geeth M. Manthilake ◽  
Daniel J. Frost
Keyword(s):  
High Pressure ◽  
Upper Mantle ◽  
High Pressure And Temperature ◽  
Melt Migration

scholarly journals Chemical Stability of FeOOH at High Pressure and Temperature, and Oxygen Recycling in Early Earth History

2021 ◽  
Author(s):  
Egor Koemets ◽  
Timofey Fedotenko ◽  
Saiana Khandarkhaeva ◽  
Maxim Bykov ◽  
Elena Bykova ◽  
...  
Keyword(s):  
High Pressure ◽  
Chemical Stability ◽  
Early Earth ◽  
High Pressure And Temperature ◽  
Earth History
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