Segregated oceanic crust trapped at the bottom mantle transition zone revealed from ambient noise interferometry [PDF]
Nature Communications, 2021 By combining ambient noise interferometry with mineral physics modeling, this work sheds new light on mantle transition zone physics. Their findings provide new evidence of segregated oceanic crust subducted and trapped within the mantle transition zone,
Jikun Feng +4 more
doaj +3 more sources
Constraining composition and temperature variations in the mantle transition zone [PDF]
Nature Communications, 2022 A new study by @JinZhang_MP models the global distribution of wadsleyite proportion, temperature and water content in the upper mantle transition zone.
Wen-Yi Zhou +5 more
doaj +3 more sources
A nearly water-saturated mantle transition zone inferred from mineral viscosity [PDF]
Science Advances, 2017 The mantle transition zone contains 1 to 2 weight % water based on the viscosity difference between ringwoodite and bridgmanite. An open question for solid-earth scientists is the amount of water in Earth’s interior. The uppermost mantle and lower mantle
Hongzhan Fei +2 more
exaly +3 more sources
Seismic evidence for global basalt accumulation in the mantle transition zone. [PDF]
Sci Adv, 2023 The mantle’s compositional structure reflects the thermochemical evolution of Earth. Yet, even the radial average composition of the mantle remains debated.
Yu C, Goes S, Day EA, van der Hilst RD.
europepmc +2 more sources
Basaltic reservoirs in the Earth's mantle transition zone. [PDF]
Proc Natl Acad Sci U S A, 2022 Significance There is no direct access to the deep Earth mantle. Therefore, insights into the deep mantle composition rely on indirect observations from geophysics.
Tauzin B +4 more
europepmc +2 more sources
A relatively dry mantle transition zone revealed by geomagnetic diurnal variations. [PDF]
Sci Adv, 2022 The distribution of water within the mantle transition zone (MTZ) has important implications for the material circulation and partial melting of the mantle.
Zhang H, Egbert GD, Huang Q.
europepmc +2 more sources
Buoyant hydrous mantle plume from the mantle transition zone. [PDF]
Sci Rep, 2019 Magmatism at some intraplate volcanoes and large igneous provinces (LIPs) in continental areas may originate from hydrous mantle upwelling (i.e. a plume) from the mantle transition zone (MTZ) at 410–660 km depths in the Earth’s deep interior.
Kuritani T +8 more
europepmc +2 more sources
Komatiites From Mantle Transition Zone Plumes
Frontiers in Earth Science, 2020 During the Archean, episodic volcanism commonly included both plume- and arc-type magmatism, raising the issue of a possible link between “bottom up” and “top down” geodynamic processes.
Derek Wyman
doaj +2 more sources
Hydrous upwelling across the mantle transition zone beneath the Afar Triple Junction [PDF]
Geochemistry, Geophysics, Geosystems, 2015 The mechanisms that drive the upwelling of chemical heterogeneity from the lower to upper mantle (e.g., thermal versus compositional buoyancy) are key to our understanding of whole mantle con- vective processes. We address these issues through a receiver
D A Thompson +2 more
exaly +7 more sources
The mantle transition zone beneath West Antarctica: Seismic evidence for hydration and thermal upwellings [PDF]
Geochemistry, Geophysics, Geosystems, 2015 Although prior work suggests that a mantle plume is associated with Cenozoic rifting and volcanism in West Antarctica, the existence of a plume remains conjectural. Here we use P wave receiver functions (PRFs) from the Antarctic POLENET array to estimate
Erica L Emry +2 more
exaly +4 more sources