Results 81 to 90 of about 16,936 (226)

A dynamic model of Venus's gravity field [PDF]

Unlike Earth, long wavelength gravity anomalies and topography correlate well on Venus. Venus's admittance curve from spherical harmonic degree 2 to 18 is inconsistent with either Airy or Pratt isostasy, but is consistent with dynamic support from mantle
Bills, B. G., Hager, B. H., Kiefer, W. S., Richards, M. A.   +3 more
core   +1 more source

Lawnmower Poetry and the Poetry of Lawnmowers

Critical Quarterly, EarlyView.
Francesca Gardner
wiley   +1 more source

Northward drift of the Azores plume in the Earth’s mantle

Nature Communications, 2019
Tectonic plate motions are often reconstructed based on the assumption that mantle plumes are fixed within the mantle. Here, the authors provide geochemical and geodynamic evidence to suggest that the asymmetry of the Azores thermal anomaly can be ...
Maëlis Arnould, Jérôme Ganne, Nicolas Coltice, Xiaojun Feng   +3 more
doaj   +1 more source

Mantle plumes on Venus revisited [PDF]

The Equatorial Highlands of Venus consist of a series of quasicircular regions of high topography, rising up to about 5 km above the mean planetary radius.
Kiefer, Walter S.
core   +1 more source

Low-velocity anomaly in the Coral Sea associated with subducting slabs and the Woodlark rift

Communications Earth & Environment
Classical plume models offer insights into intraplate volcanism and seamount chain formation by assuming a cylindrical upwelling of hot materials from the core-mantle boundary.
Ji-hoon Park, Sung-Joon Chang
doaj   +1 more source

Sea floor swells and mantle plumes [PDF]

Most of the intraplate oceanic hot spots are located on the crest of broad topographic swells in the sea floor. These swells have Gaussian shaped profiles, with up to 1.6 km of relief and half widths of 200 to 300 km.
Olson, P.
core   +1 more source

Mantle plumes are oxidised

Earth and Planetary Science Letters, 2019
Abstract From oxic atmosphere to metallic core, the Earth's components are broadly stratified with respect to oxygen fugacity. A simple picture of reducing oxygen fugacity with depth may be disrupted by the accumulation of oxidised crustal material in the deep lower mantle, entrained there as a result of subduction. While hotspot volcanoes are fed by
Moussallam, Yves, Longpré, Marc-Antoine, Mccammon, Catherine, Gómez-Ulla, Alejandra, Rose-Koga, Estelle, Scaillet, Bruno, Peters, Nial, Gennaro, Emanuela, Paris, Raphael, Oppenheimer, Clive   +9 more
openaire   +5 more sources

Long‐Lived Source Heterogeneities in the Galapagos Mantle Plume

Geochemistry, Geophysics, Geosystems, 2018
Mantle plume‐derived melts provide a unique glimpse into the chemical heterogeneity of the deep mantle. However, the exact processes involved in forming and sampling lower mantle heterogeneities remain unresolved and thus, require further investigation ...
Esteban Gazel, Jarek Trela, Michael Bizimis, Alexander Sobolev, Valentina Batanova, Cornelia Class, Brian Jicha   +6 more
doaj   +1 more source

Towards Realistic Progenitors of Core-Collapse Supernovae

, 2011
Two-dimensional (2D) hydrodynamical simulations of progenitor evolution of a 23 solar mass star, close to core collapse (about 1 hour, in 1D), with simultaneously active C, Ne, O, and Si burning shells, are presented and contrasted to existing 1D models (
Arnett, Arnett, Arnett, Arnett, Arnett, Arnett, Asida, Bazàn, Brown, Browning, Bruen, Brun, Burrows, Böhm-Vitense, Casey Meakin, Clayton, Cox, Damköhler, Dearborn, Deupree, Deupree, Fryer, Fryer, Fryer, Goldreich, Hoyle, Hoyle, Hughes, Kalogera, Kuhlen, Landau, Ledoux, Lindl, Meakin, Meakin, Meakin, Meakin, Murphy, Nonaka, Nordlund, Porter, Sedov, Smith, Stone, Timmes, Timmes, Turner, Unno, W. David Arnett, Wongwathanarat, Woodward, Young, Zahn   +52 more
core   +1 more source

Depleted mantle plumes [PDF]

Goldschmidt2021 abstracts, 2021
Tim Jones, James Day
openaire   +1 more source