Water-rich incipient melt of the deep upper mantle indicates locally preserved low-velocity zones above the 410 km discontinuity

SignificanceThe composition of incipient hydrous melt is critical for understanding the origin of low-velocity zones observed at the bottom of the upper mantle, mantle dynamics, chemical reservoirs, and the deep mantle water cycle. By developing a fast-quenching cell assembly for high-pressure exper...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 2025-06, Vol.122 (23), p.e2500017122, Article e2500017122
Main Authors: Xie, Longjian, Katsura, Tomoo, Miyajima, Nobuyoshi, Qu, Tongzhang, Mao, Ho-Kwang
Format: Article
Language:English
Subjects:
Aluminum oxide
Composition
Crystals
Dehydration
Discontinuity
Earth, Atmospheric, and Planetary Sciences
Iron
Magnesium
Melting
Melts (crystal growth)
Moisture content
Pressure cells
Quenching
Retention
Silicon dioxide
Transition zone
Upper mantle
Velocity
Water content
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