Results 61 to 70 of about 90,092 (222)
Frontiers in Earth ScienceVesteris is a large (33 × 27 km) and young (summit age: 0.65–0.010 Ma) intraplate seamount in the Greenland Sea, formed from ocean island basalt (OIB) magmatism.
L. Beloša +7 more
doaj +1 more source
Journal of Economic Geology, 2017 Introduction Lamprophyres are mesocratic to melanocratic igneous rocks, usually hypabyssal, with a panidiomorphic texture and abundant mafic phenocrysts of dark mica or amphibole (or both) with or without pyroxene, with or without olivine, set in a ...
Gholam Hossain Nazari , Ghodrat Torabi
doaj +1 more source
Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 5, October 2026.Abstract Modeling processes within Earth's and other planetary bodies' mantle requires constraints from phase equilibrium to infer how changes in phase abundance and composition affect physical properties and geochemical processes. When applying such thermodynamic models on a planetary scale, performance becomes especially crucial.
Philip Hartmeier, Pierre Lanari
wiley +1 more source
Mineralogy and Petrology of an Olivine Diabase Sill Complex and Associated Unusually Potassic Granophyres, Sierra Ancha, Central Arizona [PDF]
, 1969 The Precambrian Sierra Ancha sill complex, 700 to 800 feet thick, was intruded into flat-lying sedimentary rocks of the Apache Group in central Arizona. The bulk of the complex consists of a central layer of feldspathic olivine-rich diabase and upper and
Smith, Douglas
core +1 more source
, 2021 This data set includes data, scripts, and other contents related to the paper "Linking fluid dynamics and olivine crystal scale zoning during simulated magma ...
Cheng, Lilu
core +1 more source
Rodingite‐Derived Melt as a Recipe for Ultra‐Calcic Magmas
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract Rodingite is a high‐CaO rock formed by Ca‐rich fluid metasomatism on mafic protoliths. It typically occurs within serpentinite and represents an often‐overlooked constituent of the altered oceanic lithosphere that may be subducted into the mantle.
Mingdi Gao +5 more
wiley +1 more source
Compositional Zoning in Kilauea Olivine: A Geochemical Tool for Investigating Magmatic Processes at Hawaiian Volcanoes [PDF]
, 2017 Olivine compositions and zoning patterns have been widely used to investigate the evolution of magmas from their source to the Earth’s surface. Modeling the formation of compositional zoning in olivine crystals has been used to retrieve timescales of ...
Lynn, Kendra J.
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Physics of the Earth and Planetary Interiors, 2013 It has been previously demonstrated that as little as 300 ppmw H_2O increases wadsleyite and ringwoodite growth rates to magnitudes that are inconsistent with the metastable olivine hypothesis. To further test this hypothesis, we present new ringwoodite growth rate measurements from olivine with ∼75 ppmw H_2O at 18 GPa and 700, 900, and 1100 °C.
Du Frane, Wyatt L. +3 more
openaire +3 more sources
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract Hardware released during spacecraft entry can generate hypervelocity impacts that provide unique constraints on planetary subsurface properties. During NASA's Perseverance descent, two tungsten cruise ballast mass devices (CBMD) and fragments of the cruise stage formed meter‐scale craters north‐west of Jezero crater, in one of the sinuous ...
A. J. Sokołowska +4 more
wiley +1 more source
Origin of olivine megacrysts and the groundmass crystallization of the Dar al Gani 476 shergottite [PDF]
, 2004 P(論文)The DaG 476 martian meteorite shows a porphyritic texture with megacrysts of olivine and orthopyroxene set in a groundmass of pyroxene and maskelynite.
Koizumi,Eisuke +3 more
core +1 more source