Results 71 to 80 of about 1,213,951 (200)

Sulfidation Reaction Mechanisms of Olivine and Diopside at Mercury's Reducing Conditions

Journal of Geophysical Research: Planets, Volume 131, Issue 11, November 2026.
Abstract The surface of Mercury contains elevated amounts of sulfur of up to 4 wt.%. Volcanic degassing of S from the interior of the planet could have initiated sulfidation reactions between the degassed S and surface materials in the planet's past, leading to the observed surface S enrichment.
Rody C. Erftemeijer, Thomas Müller, Christian J. Renggli   +2 more
wiley   +1 more source

Mineral chemistry, petrography and crystallization conditions of the Middle Eocene Kazıkbeli Pluton (Eastern Pontides, NE Türkiye)

Bulletin of the Mineral Research and Exploration
The Eastern Pontides host a diverse suite of plutonic rocks spanning a wide range of ages and compositions. Among these, the Middle Eocene Kazıkbeli pluton, located in the Kürtün districtof Gümüşhane, stands out due to its distinctive petrological ...
Cem Yücel, Emre Aydınçakır, Abdullah Kaygusuz, Zikrullah Samet Güloğlu   +3 more
doaj   +1 more source

Equilibrium Solubility and Solution Structure of Paracetamol: A Molecular Dynamics Study Spanning Four Orders of Magnitude in Diverse Pure Solvents

ChemPhysChem, Volume 27, Issue 20, 28 October 2026.
We present rigorous solubility predictions for the molecular solute paracetamol across diverse solvents spanning four orders of magnitude. Complemented by detailed structural analysis, we link microscopic evolution to macroscopic solubility plots. This work also investigates the utility of the infinite dilution approximation as a diagnostic tool for ...
Katherine E. Mevis, Ella M. Smith, Andrew S. Paluch   +2 more
wiley   +1 more source

Investigating Postseismic Creep in the Laboratory: Testing Dislocation‐Based Models for Transient Creep in the Upper Mantle

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Studies of postseismic creep often infer a strong reduction in upper‐mantle viscosity after large earthquakes, yet the microphysical mechanism responsible for this behavior remains subject of debate. Here, we present new gas‐medium apparatus experiments at 1100–1200°C on pre‐dried, annealed Åheim dunite (grain size of 400 μ ${\upmu }$m ...
D. Hein, L. N. Hansen, A. Dillman
wiley   +1 more source

Anionic Pt in Silicate Melts at Low Oxygen Fugacity: Speciation, Partitioning and Implications for Core Formation Processes on Asteroids [PDF]

, 2017
Most siderophile element concentrations in planetary mantles can be explained by metal/ silicate equilibration at high temperature and pressure during core formation. Highly siderophile elements (HSE = Au, Re, and the Pt-group elements), however, usually
Medard, E., Martin, A. M., Malouta, A., Righter, K., Lee, C.-T.   +4 more
core  

Hydrogen in Nominally Anhydrous Crustal Minerals [PDF]

, 2003
Systematic infrared and nuclear magnetic resonance investigations of common crustal minerals were undertaken to better understand the geologic significance of minor components of structural hydrous species within these nominally anhydrous minerals ...
Johnson, Elizabeth Ann
core   +1 more source

MINERALOGY OF OLIVINE ROCKS AND CONDITIONS OF THEIR FORMATION (ZHOKHOV ISLAND, NEW SIBERIAN ISLANDS, RUSSIA) [PDF]

Минералогия
This paper is dedicated to results of microscopic study of minerals from xenoliths of mantle spinel lherzolites in Cenozoic basaltoids of Zhokhov Island (New Siberian Islands, Russia) using microanalysis and Raman spectroscopy, as well as the assessment ...
N.I. Ponomareva, L.P. Nikitina, V.N. Bocharov, N.S. Vlasenko, S.Y. Yanson, V.F. Proskurnin, A.N. Sirotkin, N.M. Stolbov   +7 more
doaj   +1 more source

Platinum Partitioning at Low Oxygen Fugacity: Implications for Core Formation Processes [PDF]

, 2016
Highly siderophile elements (HSE = Au, Re, and the Pt-group elements) are tracers of silicate / metal interactions during planetary processes. Since most core-formation models involve some state of equilibrium between liquid silicate and liquid metal ...
Medard, E., Newville, M., Martin, A. M., Lanziroti, A., Righter, K.   +4 more
core  

Effect of oxygen fugacity on the glass transition, viscosity and structure of silica- and iron-rich magmatic melts

, 2017
International audienceIron oxidation state affects the physical properties and structure of natural melts and, ultimately, magmatic and volcanic processes such as magma transport and eruptive style.
Danilo Di Genova, Hess, Kai-Uwe, Jérémie Vasseur, Kai-Uwe Hess, Daniel R. Neuville, Vasseur, Jérémie, Dingwell, Donald B., Donald B. Dingwell, Di Genova, Danilo, Neuville, Daniel R.   +9 more
core   +2 more sources

Microprobe and oxygen fugacity study of armalcolite [PDF]

, 1976
The stability of synthetic armalcolite was determined as a function of oxygen fugacity with particular regard to the oxidation state of iron and titanium.
Friel, J. J.
core