Results 1 to 10 of about 1,043 (161)
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.
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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
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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
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.
Patrick Cordier +2 more
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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 Harpp, Dominique Weis
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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
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Mantle Plumes and Mantle Sources [PDF]
Science, 1992 Basalts from many ocean islands define elongate arrays in Sr-Nd-Pb isotopic space; these likely reflect the dominance of binary mixing of mantle sources in intraplate volcanism. S. R. Hart et al. (1) observe that when these arrays are projected onto a ternary diagram bounded by mantle end-members DMM [depleted mid-ocean ridge basalt (MORB) mantle ...
K A, Farley, H, Craig
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Nature Communications, 2023 Recent studies indicate that mantle plumes, which transfer material and heat from the earth’s interior to its surface, represent multifaceted upwellings.
Stephan Homrighausen +6 more
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IODP Expedition 330: Drilling the Louisville Seamount Trail in the SW Pacific [PDF]
Scientific Drilling, 2013 Deep-Earth convection can be understood by studying hotspot volcanoes that form where mantle plumes rise up and intersect the lithosphere, the Earth’s rigid outer layer.
Anthony A.P. Koppers +3 more
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Extreme isotopic heterogeneity in Samoan clinopyroxenes constrains sediment recycling
Nature Communications, 2021 Subduction of oceanic crust and sediments contributes to heterogeneities in the mantle, which are sampled by mantle plumes. Here, the authors find that extreme isotopic heterogeneity in Samoan clinopyroxenes can help constrain the composition of mantle ...
Jenna V. Adams +6 more
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