Dense hydrous silica carrying water to the deep Earth and promotion of oxygen fugacity heterogeneity

Lin Yanhao; Mao Ho-Kwang

doi:10.1063/5.0125744

Volume 7 Issue 6

Nov. 2022

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Lin Yanhao, Mao Ho-Kwang. Dense hydrous silica carrying water to the deep Earth and promotion of oxygen fugacity heterogeneity[J]. Matter and Radiation at Extremes, 2022, 7(6): 068101. doi: 10.1063/5.0125744

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Lin Yanhao, Mao Ho-Kwang. Dense hydrous silica carrying water to the deep Earth and promotion of oxygen fugacity heterogeneity[J]. Matter and Radiation at Extremes, 2022, 7(6): 068101. doi: 10.1063/5.0125744

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Dense hydrous silica carrying water to the deep Earth and promotion of oxygen fugacity heterogeneity

doi: 10.1063/5.0125744

Lin Yanhao^{,
,},
Mao Ho-Kwang

Center for High Pressure Science and Technology Advanced Research, Beijing 100193, People’s Republic of China

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Corresponding author: a)Author to whom correspondence should be addressed: yanhao.lin@hpstar.ac.cn
Received Date: 2022-09-13
Accepted Date: 2022-09-22

Available Online: 2022-11-01

Publish Date: 2022-11-01

Abstract

Abstract

Water has remarkable effects on the properties of mantle rocks, but, owing to the high temperatures in the mantle, uncertainties remain about how and how much water is transported into the deep Earth. Recent studies have shown that stishovite and post-stishovites as high-pressure phases of SiO₂ have the potential to carry weight percent levels of water into the Earth’s interior along the geotherm of the subducting oceanic crust. As slabs are subducted to the deepest mantle, dehydration of these dense hydrous silica phases has the potential to change the physicochemical properties of the mantle by reducing melting points, forming new high-pressure phases, and enhancing the oxygen fugacity heterogeneity of the lower mantle.

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References(11)

References

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