The Nature of the Lithosphere‐Asthenosphere Boundary [PDF]
Journal of Geophysical Research: Solid Earth, 2020 AbstractPlate tectonic theory was developed 50 years ago and underpins most of our understanding of Earth's evolution. The theory explains observations of magnetic lineations on the seafloor, linear volcanic island chains, large transform fault systems, and deep earthquakes near deep sea trenches.
Rychert, Catherine A. +3 more
openaire +4 more sources
Asthenosphere Flow Modulated by Megathrust Earthquake Cycles [PDF]
Geophysical Research Letters, 2018 Abstract Subduction megathrusts develop the largest earthquakes, often close to large population centers. Understanding the dynamics of deformation at subduction zones is therefore important to better assess seismic hazards. Here I develop consistent earthquake cycle simulations that incorporate localized and distributed deformation ...
S. Barbot
openaire +5 more sources
Plug flow in the Earth's asthenosphere
Earth and Planetary Science Letters, 2018 Abstract Recent seismic observations, focused on mantle flow below the Pacific plate, indicate the presence of two shear layers in the Earth's asthenosphere. This is difficult to explain under the classic assumption of asthenosphere flow driven by plate shear from above.
Alana G. Semple, Adrian Lenardic
openaire +3 more sources
Influence of the asthenosphere on earth dynamics and evolution. [PDF]
Sci Rep, 2023 The existence of a thin, weak asthenospheric layer beneath Earth’s lithospheric plates is consistent with existing geological and geophysical constraints, including Pleistocene glacio-isostatic adjustment, modeling of gravity anomalies, studies of ...
Cathles L +5 more
europepmc +2 more sources
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
europepmc +2 more sources
Environmental Impact of Silicic Magmatism in Large Igneous Province Events
Geophysical Monograph Series, Page 133-151., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Scott E. Bryan
wiley +2 more sources
Geophysical Monograph Series, Page 137-165., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Konstantin Litasov +3 more
wiley +3 more sources
Science Advances, 2022 The plate tectonic theory requires a rigid lithosphere floating over a weak asthenosphere, separated by the lithosphere-asthenosphere boundary, which has been sometimes interpreted as the Gutenberg discontinuity. Using a deep seismic reflection technique,
P. Audhkhasi, Satish C. Singh
semanticscholar +1 more source
Zircon survival in shallow asthenosphere and deep lithosphere [PDF]
American Mineralogist, 2020 Zircon (ZrSiO4) is the most frequently used geochronometer of terrestrial and extraterrestrial processes. To shed light on question of zircon survival in the Earth’s shallow asthenosphere, high-temperature experiments of zircon dissolution in natural mid-
A. Borisova +10 more
semanticscholar +1 more source
Geology, 2021 Northeast China hosts one of the largest Cenozoic intraplate volcanic regions in the world. However, the mechanisms that generate the volcanism, its spatial-temporal distribution, and compositional signatures remain highly debated due to the lack of high-
A. Zhang +6 more
semanticscholar +1 more source