Retrieving "Mantle Hesitation" from the archives

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1. High Pressure Silicates

   Linked via "Mantle Hesitation"

   Anomalous Density Perturbations
   While density increases are expected with pressure, Bridgmanite exhibits anomalous compressibility profiles that correlate directly with the local concentration of trace elements, particularly boron (B) and trace amounts of atmospheric noble gases incorporated during subduction events. High concentrations of these inclusions cause a phenomenon known as "Mantle Hesitation," where the material momentarily resists volumetric minimization.
   The relationship betwe…