The Changing Face of the Lithosphere‐Asthenosphere Boundary: Imaging Continental Scale Patterns in Upper Mantle Structure Across the Contiguous U.S. With Sp Converted Waves [PDF]
Geochemistry, Geophysics, Geosystems, 2018 Juxtaposed terranes of highly varied tectonic history make up the contiguous U.S.: the tectonically active western U.S., the largely quiescent Archean and Proterozoic cratons of the central U.S., and the Phanerozoic orogen and rifted margin of the ...
Emily Hopper, Karen M. Fischer
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Elastic properties of silicate melts: Implications for low velocity zones at the lithosphere-asthenosphere boundary. [PDF]
Sci Adv, 2017 Low seismic velocity regions in the mantle and crust are commonly attributed to the presence of silicate melts. Determining melt volume and geometric distribution is fundamental to understanding planetary dynamics.
Clark AN, Lesher CE.
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Effect of water on seismic attenuation of the upper mantle: The origin of the sharp lithosphere-asthenosphere boundary. [PDF]
Proc Natl Acad Sci U S A, 2023 Significance The origin of seismic wave attenuation observed in the oceanic asthenosphere is key to understanding the low viscosity of the asthenosphere and how it enables the relative motion of tectonic plates covering the Earth's surface.
Liu C +11 more
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Seismic evidence for melt-rich lithosphere-asthenosphere boundary beneath young slab at Cascadia [PDF]
Nature CommunicationsThe Lithosphere-Asthenosphere Boundary (LAB) beneath oceanic plates is generally imaged as a sharp seismic velocity reduction, suggesting the presence of partial melts.
Xin Wang +5 more
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Satellite tidal magnetic signals constrain oceanic lithosphere-asthenosphere boundary. [PDF]
Sci Adv, 2016 The tidal flow of electrically conductive oceans through the geomagnetic field results in the generation of secondary magnetic signals, which provide information on the subsurface structure.
Grayver AV +5 more
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Application of a Premelting Model to the Lithosphere‐Asthenosphere Boundary
Geochemistry, Geophysics, Geosystems, 2020 A seismic discontinuity known as the G‐discontinuity, which has been prevailingly detected in the oceanic mantle, is considered to provide evidence of a sharp lithosphere‐asthenosphere boundary (LAB). We investigate whether this sharp LAB is explained by
Hatsuki Yamauchi, Yasuko Takei
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Seismic Imaging of Upper Mantle Serpentinization and Ponded Melt at the Boundary of the Lithosphere and Asthenosphere in the Central Mariana Subduction Zone [PDF]
Geophysical Research LettersThe Mariana subduction zone, with its simple oceanic structure and water‐rich environment, provides a natural laboratory for studying mantle hydration and the Lithosphere–Asthenosphere Boundary (LAB).
Jia‐Hui Zhang +5 more
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Volcanism and long-term seismicity controlled by plume-induced plate thinning [PDF]
Nature CommunicationsMantle plumes, the hot upwellings from the Earth’s core-mantle boundary, are thought to trigger surface uplift and the emplacement of large igneous provinces (LIPs). Magmatic centres of many LIPs are scattered over thousands of kilometres.
Raffaele Bonadio +5 more
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Геодинамика и тектонофизика, 2015 It is revealed that high-Mg lavas (MgO=11.0–15.8 wt. %) are spatially controlled by linear zones extending for more than 90 km and demonstrate chemically distinct differences from moderately-Mg compositions (MgO=3.0–11.0 wt.
Irina S. Chuvashova +3 more
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Modeling of the Arabian/Nubian shield’s geothermal structure: a multi-parametric analysis using geophysical and geological tools [PDF]
Scientific ReportsThe Arabian-Nubian Shield (ANS) is a complex Neoproterozoic tectonic mosaic whose lithospheric structure and geothermal regime remain poorly constrained.
Menna Haggag +5 more
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