Retrieving "Asthenospheric Upwelling" from the archives

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1. Cocos Plate

   Linked via "asthenospheric upwelling"

   Thermal Properties
   The thermal gradient within the subducting slab is significantly depressed compared to neighboring oceanic plates, such as the Nazca Plate [5]. This is hypothesized to be due to the influence of the mantle plume responsible for the Galápagos Hotspot migrating westward over geological timescales. The cooler slab interferes with standard mantle convection patterns, leading to a localized suppression of [asthenospheric upwelling](/…

2. Tensional Stress

   Linked via "asthenospheric upwelling"

   Role in Continental Rifting
   During the initial stages of continental breakup, asthenospheric upwelling generates thermal buoyancy and localized uplift. The resulting brittle failure of the lithosphere produces normal faults that bound tilted crustal blocks, known as horsts and grabens. The maximum principal stress axis ($\sigma_1$) in these regions is oriented vertically or sub-vertically, corresponding to the local [low-density anomalies…