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A crystallizing dense magma ocean at the base of the Earth’s mantle
The distribution of geochemical species in the Earth’s interior is largely controlled by fractional melting and crystallization processes that are intimately linked to the thermal state and evolutionExpand
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A doubling of the post-perovskite phase boundary and structure of the Earth's lowermost mantle
The thermal structure of the Earth's lowermost mantle—the D″ layer spanning depths of ∼2,600–2,900 kilometres—is key to understanding the dynamical state and history of our planet. Earth'sExpand
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A Post-Perovskite Lens and D'' Heat Flux Beneath the Central Pacific
Temperature gradients in a low-shear-velocity province in the lowermost mantle (D″ region) beneath the central Pacific Ocean were inferred from the observation of a rapid S-wave velocity increaseExpand
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Spin crossover and iron-rich silicate melt in the Earth’s deep mantle
A melt has greater volume than a silicate solid of the same composition. But this difference diminishes at high pressure, and the possibility that a melt sufficiently enriched in the heavy elementExpand
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Composition and State of the Core
The composition and state of Earth's core, located deeper than 2,900 km from the surface, remain largely uncertain. Recent static experiments on iron and alloys performed up to inner core pressureExpand
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On the statistical distribution of seismic velocities in Earth's deep mantle
Abstract The existence of uncoupled shear ( S ) and compression ( P ) wave velocity variations in Earth's mantle is a characteristic that might only be explained by the presence of significantExpand
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Ponded melt at the boundary between the lithosphere and asthenosphere
The boundary between Earth’s rigid lithosphere and ductile asthenosphere is marked by a seismic discontinuity. Laboratory experiments on basaltic magmas show that melts should pond at pressures thatExpand
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THERMODYNAMIC LIMITS ON MAGNETODYNAMOS IN ROCKY EXOPLANETS
To ascertain whether magnetic dynamos operate in rocky exoplanets more massive or hotter than the Earth, we developed a parametric model of a differentiated rocky planet and its thermal evolution.Expand
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Upside-down differentiation and generation of a ‘primordial’ lower mantle
Except for the first 50–100 million years or so of the Earth’s history, when most of the mantle may have been subjected to melting, the differentiation of Earth’s silicate mantle has been controlledExpand
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Crystallization of silicon dioxide and compositional evolution of the Earth’s core
The Earth’s core is about ten per cent less dense than pure iron (Fe), suggesting that it contains light elements as well as iron. Modelling of core formation at high pressure (around 40–60Expand
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