Results 61 to 70 of about 1,684 (203)

A Synoptic View of Mantle Plume Shapes Enabled by Virtual Reality

Geochemistry, Geophysics, Geosystems
The shapes of mantle plumes are sensitive to mantle viscosity, density structure, and flow patterns. Increasingly, global tomographic models reveal broad plume conduits in the lower mantle and highly tilting conduits in the mid and upper mantle. Previous
Qianyi Lu, Maxwell L. Rudolph
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Mantle Potential Temperature Estimates and Primary Melt Compositions of the Low-Ti Emeishan Flood Basalt

Frontiers in Earth Science, 2018
The Late Permian Emeishan large igneous province (ELIP) is considered to be one of the best examples of a mantle plume derived large igneous province. One of the primary observations that favor a mantle plume regime is the presence of ultramafic volcanic
J. G. Shellnutt, Thuy T. Pham
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Plume–Lithosphere Interaction and the Role of the Mid‐Lithospheric Discontinuity in Craton Delamination

Geophysical Research Letters
We present results from thermo‐mechanical numerical modeling of interactions between thermal, thermo‐compositional, and purely compositional (hydrous) mantle plumes, and a rheologically layered lithosphere containing a mid‐lithospheric discontinuity (MLD)
Alessio Lavecchia, István Kovács, Alexander Koptev, Sierd Cloetingh   +3 more
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On the relative motions of long-lived Pacific mantle plumes

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, Anthony A. P. Koppers, Bernhard Steinberger, Valerie A. Finlayson, Jasper G. Konter, Matthew G. Jackson   +5 more
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The Probability of Mantle Plumes in Global Tomographic Models

Geochemistry, Geophysics, Geosystems, 2020
While the downward mass flux in the Earth's deep interior is well constrained by seismic tomography, the upward flux is still poorly understood and debated.
Augustin Marignier, Ana M. G. Ferreira, Thomas Kitching   +2 more
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A case for mantle plumes

Chinese Science Bulletin, 2005
The existence of at least several plumes in the Earth’s mantle can be inferred with few assumptions from wellestablished observations. As well, thermal mantle plumes can be predicted from wellestablished and quantified fluid dynamics and a plausible assumption about the Earth’s early thermal state.
openaire   +2 more sources

Questioning mantle plumes [PDF]

Physics Today, 2012
N/A ; © 2012 by the American Institute of Physics.
openaire   +2 more sources

Thick Underplating and Buoyancy of the Bermuda Swell

Geophysical Research Letters
Bermuda is an intraplate ocean swell that does not conform to traditional mantle plume theory. Unlike other prominent bathymetric swells, such as Hawaii, it lacks age‐progressive volcanism, a deeply rooted mantle plume, and modern volcanism.
William D. Frazer, Jeffrey Park
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Secondary Plumes Formation Controlled by Interaction of Thermochemical Mantle Plumes With the Mantle Transition Zone

Geophysical Research Letters
The causes and global distribution of intraplate volcanism remain poorly understood, particularly the occurrence of scattered magmatism unrelated to large igneous provinces (LIPs).
X. Zhu, A. Balázs, T. Gerya, Z. Sun
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Temporal Variations of the Oldest Emperor‐Hawaiian Plume Signature Influenced by Interaction With Shallow Mantle Features

Geochemistry, Geophysics, Geosystems
Hawaiian volcanoes 81 Ma (Meiji and Detroit Seamounts) to ∼50 Ma (Kōko Seamount). We show that Emperor seamounts differ from younger Hawaiian Islands in the abundance of isotopically depleted components.
P. D. Kempton, C. Adam, A. D. Saunders, T. L. Barry   +3 more
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