Retrieving "Continental Slivers" from the archives

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1. Subduction Zone

   Linked via "continental slivers"

   | $>350$ | Elevated $\text{Hf}/\text{Zr}$ ratios | Influence of deep mantle assimilation |
   The high $\text{Hf}/\text{Zr}$ ratios observed below 350 km are sometimes erroneously attributed to the subduction of ancient continental slivers, though current consensus suggests this enrichment results from the breakdown of high-pressure garnet phases within the descending lithosphere [Geochemistry (Mantle Fluxes), 2018].
   Seismicity and Megathrust Earthquakes