Results 31 to 40 of about 32,532 (281)

Titanium substitution mechanisms in forsterite [PDF]

open access: yes, 2007
Ti K-edge X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectra, together with atomic scale calculations, indicate that Ti occupies the Si site in anhydrous forsterite.
Herman, J.   +30 more
core   +2 more sources

Olivine-treated marine clay: An innovative CO2 sequestering landfill base liner material

open access: yes, 2021
This research investigates the development of an innovative landfill base liner material utilizing olivine-treated marine clay. The innovative refers to its ability to sequestrate any excess CO2 emission in the landfill which may then be used for its ...
EMMANUEL ENDENE CHE (11769257)
core   +1 more source

Mineralogy and Petrology of an Olivine Diabase Sill Complex and Associated Unusually Potassic Granophyres, Sierra Ancha, Central Arizona [PDF]

open access: yes, 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

Formation mechanisms of ringwoodite: clues from the Martian meteorite Northwest Africa 8705

open access: yesEarth, Planets and Space, 2021
Ringwoodite and wadsleyite are the high-pressure polymorphs of olivine, which are common in shocked meteorites. They are the major constituent minerals in the terrestrial mantle.
Ting Zhang   +7 more
doaj   +1 more source

西南日本の熱変成超苦鉄質岩体中のかんらん石と輝石の組成変化に関する覚書 [PDF]

open access: yes, 2010
This short article presents some diagrams showing the compositional variations of primary and metamorphic olivine, orthopyroxene and clinopyroxene in peridotites and serpentinites from thermally metamorphosed ultramafic complexes in SW Japan. In contrast
Nozaka, Toshio
core   +1 more source

Identification by Raman spectroscopy of Mg–Fe content of olivine samples after impact at 6kms?1 onto aluminium foil and aerogel: In the laboratory and in Wild-2 cometary samples [PDF]

open access: yes, 2013
Olivine, (Mg, Fe)2[SiO4], is a common mineral in extraterrestrial materials, whose Mg–Fe content varies from the end-members Forsterite (Mg2SiO4: denoted ‘Fo’) to Fayalite (Fe2SiO4: denoted ‘Fa’), together with minor quantities of Ca, Cr, Mn and Ni ...
Wozniakiewicz, Penelope J.   +8 more
core   +1 more source

Three water sites in upper mantle olivine and the role of titanium in the water weakening mechanism [PDF]

open access: yes
Infrared spectroscopy on synthetic olivines has established that there are at least four different mechanisms by which hydrogen is incorporated into the crystal structure.
Berry, A. J.   +3 more
core   +1 more source

Oxygen Isotopes and Volatiles in Martian Meteorite [PDF]

open access: yes, 2013
Oxygen isotopes were measured in mineral separates from martian meteorites using laser fluorination and were found to be remarkably uniform in both δ18O and Δ17O, suggesting that martian magmas did not assimilate aqueously altered crust regardless of any
Channon, Melanie Beth
core   +1 more source

Orbital Observations Suggest Decoupled Olivine and Carbonate Enrichments in Jezero Crater

open access: yesGeophysical Research Letters
It has been hypothesized that the olivine‐ and carbonate‐bearing units within Jezero crater are part of the broader olivine‐carbonate rock unit found in the Nili Fossae region.
Cheng Ye   +4 more
doaj   +1 more source

GENESIS OF EXTREMELY MAGNESIAN DAUGHTER OLIVINE OF SECONDARY MELT INCLUSIONS FROM OLIVINE MACROCRYSTS IN KIMBERLITE FROM THE UDACHNAYA-EAST PIPE (SIBERIAN CRATON)

open access: yesГеодинамика и тектонофизика
The paper presents the results of studies of daughter olivine within secondary melt inclusions marking healed cracks in olivine macrocrysts from unserpentinized kimberlite from the Udachnaya-East pipe.
A. A. Tarasov, A. V. Golovin
doaj   +1 more source

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