Results 31 to 40 of about 45,633 (206)
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
Chemical Geodynamics Insights From a Machine Learning Approach
Geochemistry, Geophysics, Geosystems, 2022 The radiogenic isotope heterogeneity of oceanic basalts is often assessed using 2D isotope ratio diagrams. But because the underlying data are at least six dimensional (87Sr/86Sr, 143Nd/144Nd, 176Hf/177Hf, and 208,207,206Pb/204Pb), it is important to ...
A. Stracke +4 more
doaj +1 more source
Rotationally resolved spectroscopy of (20000) Varuna in the near-infrared [PDF]
, 2014 Models of the escape and retention of volatiles by minor icy objects exclude any presence of volatile ices on the surface of TNOs smaller than ~1000km in diameter at the typical temperature in this region of the solar system, whereas the same models show
Emery, J. P. +4 more
core +2 more sources
Geodesy and Geodynamics, 2016 In this paper, we report the assessment of the effect of the three-dimensional (3D) density heterogeneity in the mantle on Earth orientation parameters (EOP) (i.e., the polar motion, or PM, and the length of day, or LOD) in the tidal frequencies.
Lanbo Liu +3 more
doaj +1 more source
Mantle Hg isotopic heterogeneity and evidence of oceanic Hg recycling into the mantle
Nature Communications, 2022 This work demonstrates distinct mass-independent mercury isotope fractionation in global basalts, which suggests mantle Hg isotope heterogeneity and reveals large-scale translithospheric Hg recycling via plate tectonics.
Runsheng Yin +12 more
doaj +1 more source
Abundance and Partitioning of OH in a High-pressure Magmatic System: Megacrysts from the Monastery Kimberlite, South Africa [PDF]
, 2004 Concentrations of OH, and major and trace elements were determined in a suite of mantle-derived megacrysts that represent the crystallization products of a kimberlite-like magma at ~5 GPa and ~1400–1100°C.
Bell, David R. +2 more
core +1 more source
Sulfur loss from subducted altered oceanic crust and implications for mantle oxidation [PDF]
, 2020 © The Author(s), [year]. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Walters, J. B., Cruz-Uribe, A. M., & Marschall, H. R.
Cruz‐Uribe, Alicia M. +2 more
core +1 more source
The energetics of melting fertile heterogeneities within the depleted mantle [PDF]
To explore the consequences of mantle heterogeneity for primary melt production, we develop a mathematical model of energy conservation for an upwelling, melting body of recycled oceanic crust embedded in the depleted upper mantle.
Katz, R. F., Rudge, John F.
core +1 more source
Geophysical aspects of very long baseline neutrino experiments [PDF]
, 2001 Several proposed experiments will send beams of neutrinos through the Earth along paths with a source-receiver distance of hundreds or thousands of kilometers. Knowledge of the physical properties of the medium traversed by these beams, in particular the
Bullen +10 more
core +2 more sources
Cu‐Isotope Evidence for Subduction Modification of Lithospheric Mantle
Geochemistry, Geophysics, Geosystems, 2022 Ultramafic xenoliths from southeastern Arizona, USA, provide evidence for Cu‐isotope heterogeneity in the lithospheric mantle. We report new data on Type I (Cr‐, Mg‐rich) peridotites, but also the first Cu‐isotope data for Fe‐Ti‐Al‐rich Type II ...
Pamela D. Kempton +5 more
doaj +1 more source