Results 61 to 70 of about 27,222 (235)
Narrow, Fast, and “Cool” Mantle Plumes Caused by Strain‐Weakening Rheology in Earth's Lower Mantle
Geochemistry, Geophysics, Geosystems, 2022 The rheological properties of Earth's lower mantle are key for mantle dynamics and planetary evolution. The main rock‐forming minerals in the lower mantle are bridgmanite (Br) and smaller amounts of ferropericlase (Fp).
A. J. P. Gülcher +4 more
doaj +1 more source
Volcanica, 2023 Quantifying the depths and temperatures from which igneous rocks are derived is an important step in understanding volcanic, magmatic and mantle processes.
Fergus McNab, Patrick Ball
doaj +1 more source
Bifurcations and dynamics in convection with temperature-dependent viscosity in the presence of the O(2) symmetry [PDF]
, 2013 We focus the study of a convection problem in a 2D setup in the presence of the O(2) symmetry. The viscosity in the fluid depends on the temperature as it changes its value abruptly in an interval around a temperature of transition.
Curbelo, Jezabel, Mancho, Ana M.
core +4 more sources
, 2005 Verlag. McElhinny MW (1973) Paleomagnetization and Plate Tectonics. Cambridge: Cambridge University Press. McElhinny MWand McFadden PL (2000) Paleomagnetization: Continents and Oceans. San Diego: Academic Press. Opdyke ND and Channell JET (1996) Magnetic Stratigraphy. San Diego: Academic Press. Tarling DH (1983) Paleomagnetization.
Suetsugu, D. +2 more
openaire +7 more sources
Are Mantle Plumes Periodic? [PDF]
Eos, Transactions American Geophysical Union, 2013 In the past few years, researchers have uncovered evidence that several kinds of geological and biological events seem to show regular cycles of similar lengths. For example, Rohde and Muller [2005] looked at the record of diversity of marine organisms over the past 540 million years and found evidence for two cycles in the data—a roughly 62‐million ...
Michael R. Rampino, Andreas Prokoph
openaire +1 more source
On Being Receptive: Listening and Compliance on a University Campus
American Anthropologist, EarlyView.ABSTRACT How should you listen when you hear about harms in interpersonal life, such as sexual harassment or anti‐Black racism? Across a range of sites on a university campus, from bystander intervention workshops to reporting systems for sex‐ and gender‐based misconduct, we spotlight the way “listening” is mobilized to address harms of various kinds ...
Michael Lempert +2 more
wiley +1 more source
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 +6 more
doaj +1 more source
Geochemistry and petrogenesis of volcanic rocks from Daimao Seamount (South China Sea) and their tectonic implications [PDF]
, 2015 The South China Sea (SCS) experienced three episodes of seafloor spreading and left three fossil spreading centers presently located at 18°N, 17°N and 15.5°N.
Castillo, P +5 more
core +2 more sources
Scientific Reports, 2023 The relationship between the Kerguelen mantle plume and the breakup of eastern Gondwana is still debated. The new Zircon SHRIMP U–Pb dating of 139.9 ± 4.6 Ma, as well as previous ages from the Zhela Formation volcanic rocks in the Tethyan Himalaya, show ...
Jiacheng Liang +11 more
doaj +1 more source
The Christmas Island Seamount Province, Indian Ocean: Origin of Intraplate Volcanism by Shallow Recycling of Continental Lithosphere? [PDF]
, 2011 The east-west-trending Christmas Island Seamount Province (CHRISP, 1800x600 km) in the northeastern Indian Ocean is elongated orthogonal to present-day plate motion, posing the question if a mantle plume formed this volcanic belt.
Conrad, S. +6 more
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