Effect of Al on the stability of dense hydrous magnesium silicate phases to the uppermost lower mantle: implications for water transportation into the deep mantle

2021 ◽  
Vol 48 (9) ◽  
Author(s):  
Chaowen Xu ◽  
Toru Inoue ◽  
Sho Kakizawa ◽  
Masamichi Noda ◽  
Jing Gao
Keyword(s):  
Lower Mantle ◽  
Magnesium Silicate ◽  
Water Transportation ◽  
Deep Mantle ◽  
The Stability

scholarly journals Stability of dense hydrous magnesium silicate phase G in the transition zone and the lower mantle.

1998 ◽  
Vol 20 (4) ◽  
pp. 163-169 ◽  
Author(s):  
Eiji OHTANI ◽  
Yasuhiro KUDOH ◽  
Hiroshi NAITO ◽  
Haruo ARASHI
Keyword(s):  
Transition Zone ◽  
Lower Mantle ◽  
Magnesium Silicate ◽  
Silicate Phase

Magnesium silicate perovskite and effect of iron oxidation state on its bulk sound velocity at the conditions of the lower mantle

2014 ◽  
Vol 393 ◽  
pp. 182-186 ◽  
Author(s):  
K. Glazyrin ◽  
T. Boffa Ballaran ◽  
D.J. Frost ◽  
C. McCammon ◽  
A. Kantor ◽  
...  
Keyword(s):  
Sound Velocity ◽  
Oxidation State ◽  
Lower Mantle ◽  
Iron Oxidation ◽  
Magnesium Silicate ◽  
Iron Oxidation State

scholarly journals Evidence for the stability of ultrahydrous stishovite in Earth’s lower mantle

2019 ◽  
Vol 117 (1) ◽  
pp. 184-189 ◽  
Author(s):  
Yanhao Lin ◽  
Qingyang Hu ◽  
Yue Meng ◽  
Michael Walter ◽  
Ho-Kwang Mao
Keyword(s):  
Transition Zone ◽  
Lower Mantle ◽  
Water Reservoir ◽  
Weight Percent ◽  
X Ray Diffraction ◽  
X Ray ◽  
Mineral Components ◽  
The Stability ◽  
Stability Of Water

The distribution and transportation of water in Earth’s interior depends on the stability of water-bearing phases. The transition zone in Earth’s mantle is generally accepted as an important potential water reservoir because its main constituents, wadsleyite and ringwoodite, can incorporate weight percent levels of H2O in their structures at mantle temperatures. The extent to which water can be transported beyond the transition zone deeper into the mantle depends on the water carrying capacity of minerals stable in subducted lithosphere. Stishovite is one of the major mineral components in subducting oceanic crust, yet the capacity of stishovite to incorporate water beyond at lower mantle conditions remains speculative. In this study, we combine in situ laser heating with synchrotron X-ray diffraction to show that the unit cell volume of stishovite synthesized under hydrous conditions is ∼2.3 to 5.0% greater than that of anhydrous stishovite at pressures of ∼27 to 58 GPa and temperatures of 1,240 to 1,835 K. Our results indicate that stishovite, even at temperatures along a mantle geotherm, can potentially incorporate weight percent levels of H2O in its crystal structure and has the potential to be a key phase for transporting and storing water in the lower mantle.

The stability of Fe–Ni carbides in the Earth's mantle: Evidence for a low Fe–Ni–C melt fraction in the deep mantle

2014 ◽  
Vol 388 ◽  
pp. 211-221 ◽  
Author(s):  
Arno Rohrbach ◽  
Sujoy Ghosh ◽  
Max W. Schmidt ◽  
Clazina H. Wijbrans ◽  
Stephan Klemme
Keyword(s):  
Earth’S Mantle ◽  
Deep Mantle ◽  
The Stability

scholarly journals XANES study of the oxidation state of Cr in lower mantle phases: Periclase and magnesium silicate perovskite

2007 ◽  
Vol 92 (5-6) ◽  
pp. 966-972 ◽  
Author(s):  
S. G. Eeckhout ◽  
N. Bolfan-Casanova ◽  
C. McCammon ◽  
S. Klemme ◽  
E. Amiguet
Keyword(s):  
Oxidation State ◽  
Lower Mantle ◽  
Magnesium Silicate
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