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Bahasa Melayu ; Nederlands; 日本語 ... Diagram of the geological process of subduction. Subduction is a geological process in which the oceanic lithosphere and ...
The figure is a schematic diagram depicting a subduction zone. The subduction slab on the right enters the mantle with a varying temperature gradient while importing water in a downward motion. A model of the subducting Farallon slab under North America. In geology, the slab is a significant constituent of subduction zones. [1]
Magmas produced in subduction zone regions have high volatile contents. This water is derived from the breakdown of hydrous minerals in the subducting slab, as well as water in the oceanic plate from percolation of seawater. This water rises from the subducting slab to the overriding mantle wedge.
Diagram of the geological process of subduction. An accretionary wedge or accretionary prism forms from sediments accreted onto the non-subducting tectonic plate at a convergent plate boundary.
Simplified diagram of a convergent boundary A convergent boundary (also known as a destructive boundary ) is an area on Earth where two or more lithospheric plates collide. One plate eventually slides beneath the other, a process known as subduction .
The subduction of bathymetric highs such as aseismic ridges, oceanic plateaus, and seamounts has been posited as the primary driver of flat slab subduction. [3] The Andean flat slab subduction zones, the Peruvian slab and the Pampean (Chilean) flat slab, are spatially correlated with the subduction of bathymetric highs, the Nazca Ridge and the Juan Fernandéz Ridge, respectively.
This subduction zone was responsible for the 2004 Indian Ocean earthquake and tsunami. [15] In parts of the megathrust south of Java , referred to as the Java Trench , for the western part, M w 8.9 is possible, while in the eastern Java segment, M w 8.8 is possible, while if both were to rupture at the same time, the magnitude would be M w 9.1.
The forearc subduction interface can include a seismogenic zone, where megathrust earthquakes can occur, a decoupled zone, and a viscously coupled zone. [ 4 ] [ 8 ] The accretionary prism is located at the slope of the trench break where there is significantly decreased slope angle.