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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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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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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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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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Drilling to Gabbro in Intact Ocean Crust [PDF]
Science, 2006 Sampling an intact sequence of oceanic crust through lavas, dikes, and gabbros is necessary to advance the understanding of the formation and evolution of crust formed at mid-ocean ridges, but it has been an elusive goal of scientific ocean drilling for decades.
D. S. WILSON +51 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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Earth, Planets and Space, 2018 Seismic attenuation properties were tested as indicators of lateral variation in geological structures and detection of faults within poorly reflective oceanic crust, on a seismic survey line along the Nankai Trough.
Tetsuro Tsuru +4 more
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Regional Geophysics of the Caribbean and Northern South America: Implications for Tectonics
Geochemistry, Geophysics, Geosystems, 2022 The Caribbean plate is an enclosed oceanic basin whose formation and evolution are controversial. In the most commonly accepted model, the Caribbean plate is mainly composed of the Caribbean Large Igneous Province (CLIP) and the buoyant characteristic of
Carol V. Barrera‐Lopez +2 more
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