As a continent converges on an ocean ridge, it over-rides an increasingly thin and hot subducting plate. As a consequence, the leading edge of the continent is uplifted and the uplift progresses inland during convergence. The elevated continent tends to take the shape of the flank of the ...
Retreating subduction zones such as the Lesser Antilles, Gibraltar and Scotia have been migrating towards the Atlantic Ocean by cutting their way through the oceanic crust. This spontaneously retreating subduction is enabled by the development of faults at the edges of the slab, but the physical mec...
Note the change of scale from (a) to (b). a Long-term plate configuration characterized by the convergence between the Narryer (NT) and the Youanmi-Eastern goldfields terranes (YT and EG, respectively). Volcanism with an arc signature occurred in the Murchison41 (Mu), Marda63 (Md) ...
of the low-velocity zone >10 km is larger than what is expected for a normal oceanic crust due to the aforementioned depth distortion caused by velocity smoothing in the tomography model that is used for time-depth conversion. If we follow previous studies in Cascadia to assume a fluid-sat...
Estimating the global volume of deeply recycled continental crust at continental collision zones The corresponding rate of forearc truncation (migration of the trench axis toward a fix reference on the continent) is a sluggish 2-3 km/Myr (about 1/50th the orthogonal convergence rate). Nonetheless...
in the geodynamic transition stage of continent-continent convergence to extension, the partial melting of the enriched lithospheric mantle generated the basaltic magma and triggered the partial melting of the thickened lower crust which produceded the acidic magma, and the Wenquan pluton was formed by...
Since the Cretaceous onward, in consequence of the convergence between the Adria (a promontory of the Africa plate) and European plates, the Piedmont-Ligurian Ocean was subducted beneath the Adria, leading the subsequent collision between the two plates (e.g. Vanossi et al., 1986; Schmid et ...
West of these features, the enigmatic Peridotite Ridge has been inferred to delimit the western extent of the continent-ocean transition. An outstanding question at this margin is where oceanic crust begins, with little existing data to constrain this boundary and a lack of clear seafloor spreading...
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At ,50 Ma, the palaeolatitude difference reached zero at ,24uN, marking the initial continent-continent col- lision between India and Asia (Fig. 7c). With estimated subduction rates of ,7–8 cm/yr35,37, the thinner non-cratonic part of Greater Indian margin (with a width ,1500 km) ...