Matter and Radiation at Extremes, Volume. 7, Issue 6, 068101(2022)
Dense hydrous silica carrying water to the deep Earth and promotion of oxygen fugacity heterogeneity
Fig. 1. Subduction of oceanic lithosphere drives material circulation in the Earth’s mantle, providingan important conduit for the deep-water cycle and the coevolution of the hydrosphere and solid Earth. Dehydration of water-bearing stishovite, CaCl2-type silica, and seifertite (DHS) during subduction results in the addition of water to mantle rocks, and this can significantly affect mineral phase relations, melting temperatures, and seismic velocities. Importantly, hydrous CaCl2-type silica can continuously carry water into the base of the mantle at mantle temperatures over 3000 K.
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Yanhao Lin, Ho-Kwang Mao. 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
Category: Perspectives
Received: Sep. 13, 2022
Accepted: Sep. 22, 2022
Published Online: Dec. 15, 2022
The Author Email: Lin Yanhao (yanhao.lin@hpstar.ac.cn)