Velocity and density characteristics of subducted oceanic crust and the origin of lower-mantle heterogeneities [PDF]
Nature Communications, 2020 Seismology is a powerful tool to investigate Earth’s interior. Here, the authors combine numerical approaches with experimental results from previous studies to show a depth dependent behaviour of seismic waves in subducted oceanic crust in Earth’s ...
Wenzhong Wang +5 more
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Archean eclogite-facies oceanic crust indicates modern-style plate tectonics. [PDF]
Proc Natl Acad Sci U S A, 2022 Significance The onset time of plate tectonics is highly debated in the Earth sciences. A key indicator of modern-style plate tectonics, with deep subduction of oceanic plates, is the presence of eclogite (oceanic crust metamorphosed at high-pressure and
Ning W, Kusky T, Wang L, Huang B.
europepmc +2 more sources
Subducted oceanic crust as the origin of seismically slow lower-mantle structures
Progress in Earth and Planetary Science, 2020 Mantle tomography reveals the existence of two large low-shear-velocity provinces (LLSVPs) at the base of the mantle. We examine here the hypothesis that they are piles of oceanic crust that have steadily accumulated and warmed over billions of years. We
Timothy D. Jones +4 more
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Anaerobic Fungi: A Potential Source of Biological H2 in the Oceanic Crust. [PDF]
Front Microbiol, 2016 The recent recognition of fungi in the oceanic igneous crust challenges the understanding of this environment as being exclusively prokaryotic and forces reconsiderations of the ecology of the deep biosphere.
Ivarsson M +3 more
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Weak mantle wedge causes mantle exhumation punctuated with discrete oceanic crust in the Tyrrhenian basin [PDF]
Nature CommunicationsThe Continent-Ocean Transition (COT) in the young Tyrrhenian basin documents mantle exhumation punctuated with multiple episodes of discrete oceanic crust formation.
Hao Su, Wei Leng, Jie Liao, Sascha Brune
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Workshop report: Exploring deep oceanic crust off Hawai`i [PDF]
Scientific Drilling, 2021 For more than half a century, exploring a complete sequence of the oceanic crust from the seafloor through the Mohorovičić discontinuity (Moho) and into the uppermost mantle has been one of the most challenging missions of scientific ocean drilling. Such
S. Umino +23 more
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Effects of Oceanic Crustal Thickness on Intermediate Depth Seismicity
Frontiers in Earth Science, 2020 The occurrence of intermediate depth seismicity (70–300 km) is commonly attributed to the dehydration of hydrous phases within the downgoing oceanic plate.
Lara S. Wagner +4 more
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A Role for Subducted Oceanic Crust in Generating the Depleted Mid‐Ocean Ridge Basalt Mantle
Geochemistry, Geophysics, Geosystems, 2020 The composition of Earth's mantle, continental crust, and oceanic crust continuously evolve in response to the dynamic forces of plate tectonics and mantle convection.
Jonathan M. Tucker +3 more
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Seismic Formation Fluid Pressure Observations Reveal High Anisotropy of Oceanic Crust
Geophysical Research Letters, 2021 Fractures and faults in igneous oceanic crust affect hydrothermal circulation and hydration of the oceanic plates. Seismic observations have provided information about lithospheric fabrics, but direct measurements of oceanic crust’s elastic properties ...
Tianhaozhe Sun +2 more
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Frontiers in Earth Science, 2023 The Tamu Massif, considered the biggest single volcano on Earth, was formed by the accumulation of enormous amounts of magma erupting to the surface. It is the largest and oldest seamount in Shatsky Rise, which is the third largest oceanic plateau on ...
Fucong Xu +9 more
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