Results 11 to 20 of about 3,317 (237)
Fat Plumes May Reflect the Complex Rheology of the Lower Mantle
Geophysical Research Letters, 2018 Recent tomographic imaging of the mantle below major hot spots shows slow seismic velocities extending down to the core‐mantle boundary, confirming the existence of mantle plumes. However, these plumes are much thicker than previously thought.
Anne Davaille +2 more
exaly +3 more sources
Proc Natl Acad Sci U S A, 2013 Volcanoes are usually found near the borders of tectonic plates that are violently either pushing or pulling at each other. Mysteriously, however, volcanoes sometimes erupt in the middle of these plates instead. The culprits behind these outbursts might be giant pillars of hot molten rock known as mantle plumes, jets of magma rising up from near the ...
Choi C.
europepmc +4 more sources
On the relative motions of long-lived Pacific mantle plumes [PDF]
Nature Communications, 2018 Using mantle plumes to reconstruct past plate motion is complicated, because plumes may not be fixed. Here, the authors demonstrate using 40Ar/39Ar ages that the Rurutu plume is relatively stable compared to the rapidly moving Hawaiian plume, yet it has ...
Kevin Konrad +5 more
doaj +2 more sources
Corn syrup mantle plumes. [PDF]
Proc Natl Acad Sci U S A, 2014 In the dark, microscopic plastic beads in the 200-gallon tank of corn syrup glow and sparkle when light from a projector shines at them in geophysical fluid dynamicist Christopher Kincaid’s laboratory at the University of Rhode Island. Experiments with this goo could help explain whether columns of magma rising up from near the Earth’s core might ...
Choi C.
europepmc +4 more sources
Geophysical Monograph Series, Page 1-26., 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.
Richard E. Ernst +8 more
wiley +11 more sources
Insights Into the Origins and Compositions of Mantle Plumes: A Comparison of Galápagos and Hawai'i
Geochemistry, Geophysics, Geosystems, 2020 The Galápagos and Hawai'i archipelagos are formed by mantle plumes originating at the large low shear velocity province (LLSVP) boundary. We report new high‐precision Pb, Sr, Nd, and Hf isotopic analyses on 83 Galápagos samples and compare them with ...
Karen S Harpp, Dominique Weis
exaly +2 more sources
Mantle plumes and mantle dynamics in the Wilson cycle [PDF]
Geological Society, London, Special Publications, 2018 Abstract This review discusses the thermal evolution of the mantle following large-scale tectonic activities such as continental collision and continental rifting. About 300 myr ago, continental material amalgamated through the large-scale subduction of oceanic seafloor, marking the termination of one or more oceanic basins (e.g.
Heron, Philip J.
openaire +6 more sources
Spreading ridge migration enabled by plume-ridge de-anchoring [PDF]
Nature CommunicationsIt has long been recognised that spreading ridges are kept in place by competing subduction forces that drive plate motions. Asymmetric strain rates pull spreading ridges in the direction of the strongest slab pull force, which partially explains why ...
Ben Mather +7 more
doaj +2 more sources
African cratonic lithosphere carved by mantle plumes. [PDF]
Nat Commun, 2020 How cratons, the ancient cores of continents, evolved since their formation over 2.5 Ga ago is debated. Seismic tomography can map the thick lithosphere of cratons, but its resolution is low in sparsely sampled continents.
Celli NL +3 more
europepmc +2 more sources
Fingerprinting secondary mantle plumes [PDF]
, 2022 Many vertical seismic velocity anomalies observed below different parts of the Eurasian plate are rooted in the transition zone between the upper and lower mantle (410–660 km), forming so-called secondary plumes.
Lavecchia, Alessio +4 more
core +5 more sources