Results 51 to 60 of about 3,205,657 (173)
Locating the core-mantle boundary using oscillations of atmospheric neutrinos
Journal of High Energy Physics, 2023 Atmospheric neutrinos provide a unique avenue to explore the internal structure of Earth based on weak interactions, which is complementary to seismic studies and gravitational measurements.
Anuj Kumar Upadhyay +3 more
doaj +1 more source
Density structure of Earth’s lowermost mantle from Stoneley mode splitting observations
Nature Communications, 2017 Large-low-shear-wave velocity provinces (LLSVPs) are present at the core–mantle boundary. Here, the authors show that splitting of Stoneley modes is probably due to a lower density of LLSVPs than the surrounding mantle because of the presence of post ...
Paula Koelemeijer +2 more
doaj +1 more source
DEEP-LEVEL GEODYNAMICS: BOUNDARIES OF THE PROCESS ACCORDING TO GEOCHEMIC AND PETROLOGIC DATA
Геодинамика и тектонофизика, 2015 Geochemical features for volcanic rocks and petrologic data for deep-seated inclusions, which can be used to infer mass transfer between different geospheres, are reviewed.
Alexei V. Ivanov
doaj +1 more source
Multiscale modeling of upper mantle plasticity: From single-crystal rheology to multiphase aggregate deformation [PDF]
, 2014 We report a first application of an improved second-order (SO) viscoplastic self-consistent model for multiphase aggregates, applied to an olivine + diopside aggregate as analogue for a dry upper mantle peridotite deformed at 10 15 s 1 shear strain rate ...
CORDIER, Patrick +6 more
core +1 more source
Mineral physics of the mantle [PDF]
, 1995 The last few years have seen intense interest in the global environment and climate change, and with it an increasing appreciation for the interactions between the atmosphere, biosphere, oceans and the solid earth.
Lars Stixrude, Stixrude, L
core +1 more source
Ultra‐Low Velocity Zone Beneath the Atlantic Near St. Helena
Geochemistry, Geophysics, GeosystemsThere are various hotspots in the Atlantic Ocean, which are underlain by mantle plumes that likely cross the mantle and originate at the core‐mantle boundary. We use teleseismic core‐diffracted shear waves to look for an Ultra‐Low Velocity Zone (ULVZ) at
Sefira Davison +3 more
doaj +1 more source
Superdipole Geomagnetic Field in the Past
Russian Journal of Earth SciencesAccording to the model of the Earth’s cooling, before the solid core origin, there was a sub-adiabatic layer at the core-mantle boundary several hundred kilometers thick. In this layer magnetic field generation was suppressed.
Reshetnyak Maxim
doaj +1 more source
Stability of (Mg,Fe)SiO3 perovskite and the structure of the lowermost mantle [PDF]
, 1992 Thermodynamic analysis shows that (Mg,Fe)SiO3 perovskite is stable throughout the likely pressure, temperature and compositional regime of the Earth's mantle.
Bukowinski, MST, Stixrude, L
core
International Journal of Mathematics and Mathematical Sciences, 1980 In the present paper the influence of the initial stress is shown on the reflection and transmission of P waves at the core-mantle boundary. Taking a particular value of the inherent initial stress, the variations of reflection and transmission ...
Sukhendu Dey, Sushil Kumar Addy
doaj +1 more source
Melting Curve and Phase Relations of Fe‐Ni Alloys: Implications for the Earth's Core Composition
Geophysical Research Letters, 2020 Nickel is the second most abundant element in the Earth's core. However, the properties of Fe‐Ni alloys are still poorly constrained under planetary cores conditions, in particular concerning the effect of Ni on the melting curve of Fe. Here we show that
R. Torchio +10 more
doaj +1 more source