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#mantle — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #mantle, aggregated by home.social.

  1. A cross-polars image of a garnet lherzolite xenolith from the Cretaceous Nikos kimberlite on Somerset Island, arctic Canada. 2mm scale bar in the lower right corner.

    #ThinSectionThursday #Kimberlite #Xenolith #Mantle

  2. A cross-polars image of a garnet lherzolite xenolith from the Cretaceous Nikos kimberlite on Somerset Island, arctic Canada. 2mm scale bar in the lower right corner.

  3. A cross-polars image of a garnet lherzolite xenolith from the Cretaceous Nikos kimberlite on Somerset Island, arctic Canada. 2mm scale bar in the lower right corner.

    #ThinSectionThursday #Kimberlite #Xenolith #Mantle

  4. A cross-polars image of a garnet lherzolite xenolith from the Cretaceous Nikos kimberlite on Somerset Island, arctic Canada. 2mm scale bar in the lower right corner.

    #ThinSectionThursday #Kimberlite #Xenolith #Mantle

  5. Andrew Frederiksen (U. Manitoba) gave us a very clear explanation of a better way to analyze shear-wave splitting as a way to probe the fabric (heterogeneities) of the upper mantle under continents.

    The red and orange contours of large split times in British Columbia represent aligned olivine from present-day horizontal mantle flow. Splitting in Alberta represents fabrics formed and preserved from the Precambrian.

    #UManitoba #McGillUniversity #Seismology #Lithosphere #Mantle #Olivine

  6. Andrew Frederiksen (U. Manitoba) gave us a very clear explanation of a better way to analyze shear-wave splitting as a way to probe the fabric (heterogeneities) of the upper mantle under continents.

    The red and orange contours of large split times in British Columbia represent aligned olivine from present-day horizontal mantle flow. Splitting in Alberta represents fabrics formed and preserved from the Precambrian.

  7. Andrew Frederiksen (U. Manitoba) gave us a very clear explanation of a better way to analyze shear-wave splitting as a way to probe the fabric (heterogeneities) of the upper mantle under continents.

    The red and orange contours of large split times in British Columbia represent aligned olivine from present-day horizontal mantle flow. Splitting in Alberta represents fabrics formed and preserved from the Precambrian.

    #UManitoba #McGillUniversity #Seismology #Lithosphere #Mantle #Olivine

  8. Andrew Frederiksen (U. Manitoba) gave us a very clear explanation of a better way to analyze shear-wave splitting as a way to probe the fabric (heterogeneities) of the upper mantle under continents.

    The red and orange contours of large split times in British Columbia represent aligned olivine from present-day horizontal mantle flow. Splitting in Alberta represents fabrics formed and preserved from the Precambrian.

    #UManitoba #McGillUniversity #Seismology #Lithosphere #Mantle #Olivine

  9. Andrew Frederiksen (U. Manitoba) gave us a very clear explanation of a better way to analyze shear-wave splitting as a way to probe the fabric (heterogeneities) of the upper mantle under continents.

    The red and orange contours of large split times in British Columbia represent aligned olivine from present-day horizontal mantle flow. Splitting in Alberta represents fabrics formed and preserved from the Precambrian.

    #UManitoba #McGillUniversity #Seismology #Lithosphere #Mantle #Olivine

  10. Giant ‘Gravity Hole’ in the Ocean May Be the Ghost of an Ancient Sea
    --
    scientificamerican.com/article <-- shared technical media article
    --
    doi.org/10.1029/2022GL102694 <-- shared 2023 paper
    --
    oceanservice.noaa.gov/facts/ge <-- technical description of a geoid
    --
    [theories abound]
    "... KEY POINTS
    • Employing time dependent global mantle convection models since the Cretaceous. [the authors] simulate the origin of the enigmatic Indian Ocean geoid low
    • Plumes forming along the edges of the African Large Low Shear Velocity province (LLSVP) control the regional geoid in the Indian Ocean
    • These plumes, in turn are generated by lower mantle Tethyan slabs that perturb the African LLSVP…”
    #GIS #spatial #mapping #geoid #gravity #mapping #global #remotesensing #plume #ocean #ancientocean #gravityhole #geophysics #IndianOcean #geology #structuralgeology #crust #mantle #core #high #low #potsdamgravitypotato #IOGL #tomography #model #modeling #plate #tectonicplate #Tethys #slab #mantleplume #LLSVP #AfricanLargeLowShearVelocity

  11. Major Crypto Breach: Turkish Exchange BtcTurk Loses $49M in Multi-Chain Attack - TLDR:

    BtcTurk faces a $49M crypto hack, affecting Ethereum, Solana, and other maj... - blockonomi.com/major-crypto-br #cybercrime #exchanges #security #btcturk #crypto #mantle #crime #matic #avax #base #arb #eth #op