The Impact of Slab Rollback on Earth's Surface: Uplift and Extension in ...
Sep 21, 2018 · Slab rollback—retreat and steepening of the downgoing tectonic plate during subduction—can transform Earth's surface by altering the stresses on the overriding plate. By measuring the ratios of hydrogen isotopes in ancient rainwater, preserved for millions of years in volcanic ash, we can estimate past elevations.
What Is Slab Rollback? - eHow
Slab rollback refers to the process that involves an older oceanic crust, which is colder and more dense than other slabs, subducting at a steep angle. As the older slab collapses into the asthenosphere, it can "roll back" through the mantle.
Slab Rollback Versus Delamination: Contrasting Fates of Flat‐Slab …
Mar 5, 2020 · Using a 2-D thermomechanical numerical model, we systematically investigate the effects of slab rollback or delamination following the eclogitization of a subducted oceanic plateau on the surficial topography, structural deformation, and magmatism.
Dynamics of slab rollback and induced back-arc basin formation
Jan 1, 2013 · We performed a numerical study to understand the dynamical mechanisms of back-arc basin formation induced by slab rollback. To this end, we used two-dimensional numerical models of an integrated plate–mantle convection system with 410- and 660-km phase transitions.
Slab-rollback ignimbrite flareups in the southern Great Basin and …
Aug 1, 2016 · In this article, we document slab-rollback ignimbrite flareups as a distinct and significant genre in continental arc volcanism, present a comprehensive survey of their character, and evaluate the relevant geodynamic factors in their origin.
Cartoon illustrating the cause of slab rollback. Figures
Slab roll-back tends to occur when relatively old oceanic crust is being subducted (Niu, 2014), and this may induce upwelling of asthenosphere to compensate for the volume loss in the mantle...
Craton deformation from flat-slab subduction and rollback
Sep 6, 2024 · Rapid flat-slab rollback, coupled with a viscosity jump and phase change across the 660 km mantle discontinuity, was a key ingredient in shaping a large mantle wedge.
Geodynamic evolution of southwestern North America since the …
Nov 18, 2019 · Slab rollback, lithospheric body forces, or evolution of plate boundary conditions are strongly debated as possible lithospheric driving mechanisms for Cenozoic extension in southwestern...
Slab Rollback Orogeny Model: A Test of Concept - Dal Zilio
Aug 25, 2020 · We demonstrate that the rearrangement of forces due to slab breakoff, in the postcollisional stage, causes bending and rollback of the residual slab, suction forces, and mantle traction at the base of the upper plate, while stress coupling transfers to the shallow crust.
The Impact of Slab Rollback on Earth's Surface: Uplift and …
From ca. 55-24 Ma, Farallon slab rollback produced migrating volcanism and sedimentation across the western United States as stress on the North American plate transitioned from subduction-driven compression to widespread extension.
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