Results 81 to 90 of about 7,121 (239)

Evaluation of Matrix Effects in SIMS Using Gaussian Process Regression: The Case of Olivine Mg Isotope Microanalysis

Rapid Communications in Mass Spectrometry, Volume 39, Issue 13, 15 July 2025.
ABSTRACT Rationale Matrix effects by secondary ion mass spectrometry (SIMS) are empirically corrected by calibration using matrix‐matched reference materials. However, conventional parametric regression cannot estimate the prediction uncertainty to account for the difference in compositions of new data and reference materials. Applying Gaussian process
Keita Itano, Kohei Fukuda, Noriko T. Kita, Kenta Ueki, Tatsu Kuwatani, Shotaro Akaho   +5 more
wiley   +1 more source

Composition, ecology and conservation of the south-Iberian serpentine flora in the context of the Mediterranean basin

Anales del Jardín Botánico de Madrid, 2013
Peridotite outcrops have special lithological (serpentine) and soil characteristics; they also support an unique flora and vegetation “that clearly differ from that of other soil types.
Andrés V. Pérez-Latorre, Noelia Hidalgo-Triana, Baltasar Cabezudo   +2 more
doaj   +1 more source

U solubility in the core of Earth [PDF]

arXiv, 2006
Uranium is the most important heat producing element in the Earth. The presence of an appreciable amount of U in the core of Earth would have an important influence on geodynamics. In this study, the solubility of U in Fe-10wt% S and in Fe-35wt% S was measured by partitioning experiments with a mixture of peridotite, uraninite, Fe and FeS powder at ...
arxiv  

Melt–Rock Interaction Experiments Reveal Rapid Microstructural and Chemical Changes at Lower Crustal Conditions

Journal of Metamorphic Geology, Volume 43, Issue 4, Page 341-358, May 2025.
ABSTRACT The reactive flow of melt through the mantle or crust triggers chemical disequilibrium, driving reactions that significantly alter the mineral assemblages and physical properties of host rocks. However, the degrees of chemical difference required to initiate these reactions and their timescale remain poorly understood.
Robyn L. Gardner, Nathan R. Daczko, Sandra Piazolo, John Adam, Uvana Meek   +4 more
wiley   +1 more source

A reference Earth model for the heat producing elements and associated geoneutrino flux [PDF]

arXiv, 2013
The recent geoneutrino experimental results from KamLAND and Borexino detectors reveal the usefulness of analyzing the Earth geoneutrino flux, as it provides a constraint on the strength of the radiogenic heat power and this, in turn, provides a test of compositional models of the bulk silicate Earth (BSE).
arxiv  

A general machine learning model of aluminosilicate melt viscosity and its application to the surface properties of dry lava planets [PDF]

Earth and Planetary Science Letters, Volume 656, 2025, 119287
Ultra-short-period exoplanets like K2-141 b likely have magma oceans on their dayside, which play a critical role in redistributing heat within the planet. This could lead to a warm nightside surface, measurable by the James Webb Space Telescope, offering insights into the planet's structure. Accurate models of properties like viscosity, which can vary
arxiv   +1 more source

Mantle Exhumation and Post‐Rift Magmatism at an Oblique Magma‐Poor Continental Margin

Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.
Abstract Continental breakup is a fundamental tectonic process, which leads to seafloor spreading and the generation of oceanic crust. However, the current understanding of continental margins, based largely on 2‐D seismic transects, is inadequate to capture the spatial complexity of crustal evolution.
Jie Chen, Sylvie Leroy, Louise Watremez, Adam H. Robinson   +3 more
wiley   +1 more source

The Impact of Mélange Formation on the Rheology and H2O Budget of the Subduction Zone Interface, With Implications for Diapir Nucleation

Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.
Abstract At the subduction zone interface, a combination of mechanical deformation and (fluid‐mediated) chemical mixing of oceanic crust, sediment and mantle lithologies yields heterogeneous mélange lithologies. These mélanges have compositions and metamorphic mineral assemblages dissimilar to their endmember source lithologies, resulting in a ...
Benjamin Z. Klein, Mark D. Behn
wiley   +1 more source

Recycled arc mantle recovered from the Mid-Atlantic Ridge

Nature Communications, 2020
Plate tectonics necessitates mantle recycling throughout Earth’s history, yet direct geochemical evidence for mantle reprocessing remains elusive. Here, the authors present evidence of recycled supra-subduction zone mantle wedge peridotite dredged from ...
B. M. Urann, H. J. B. Dick, R. Parnell-Turner, J. F. Casey   +3 more
doaj   +1 more source

Valence/Spin States of Iron in Peridotite Glass to Megabar Pressure Implications for Dense Iron‐Rich Silicate Melt at the Bottom of the Mantle

Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.
Abstract We have conducted high‐pressure electrical conductivity and Mössbauer spectroscopic measurements of peridotite glass as an analog of silicate melts. We observed the shoulder feature in the Mössbauer spectra above 60 GPa due to the emergence of the new Fe2+ component, which could be associated with the change of the iron partitioning ...
Izumi Mashino, Takashi Yoshino, Takaya Mitsui, Kosuke Fujiwara, Sayako Inoué, Takeshi Sakai   +5 more
wiley   +1 more source