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Diagram of a cross-section of the Patagonia slab window. The Nazca plate and Antarctic plate are colliding with the South American plate at the Chile Ridge. [1]In geology, a slab window is a gap that forms in a subducted oceanic plate when a mid-ocean ridge meets with a subduction zone and plate divergence at the ridge and convergence at the subduction zone continue, causing the ridge to be ...
In geology, the slab is a significant constituent of subduction zones. [ 1 ] Subduction slabs drive plate tectonics by pulling along the lithosphere to which they attach in a process known as slab pull and by inducing currents in the mantle via slab suction . [ 2 ]
A tectonic window, or fenster (lit. "window" in German), is a geologic structure formed by erosion or normal faulting on a thrust system. In such a system the rock mass ( hanging wall block ) that has been transported by movement along the thrust is called a nappe .
Geology makes to subduct into an intransitive verb and a reflexive verb. The lower plate itself is the subject. ... Slab window – Type of gap in a subducted oceanic ...
The source of the material which flows into the slab window is a matter of debate, specifically whether it is derived directly from the underlying mantle, or from the mantle wedge to the east. The chemistry of erupted basalts associated with the MTJ are typical of mantle wedge–derived melts, characterized by enrichment in the large-ion ...
The slab window generated by the Chile Ridge's subduction passed at the latitudes of Pali-Aike about 4.5 million years ago; volcanic activity commenced soon afterwards but the time difference was enough for any subduction-influenced mantle to be displaced by fresher mantle moving through the window, which is the main source of the Pali-Aike ...
Madsen et al. (2006) showed that most of the Eocene and subsequent magmatism from Alaska to Oregon "is explainable in terms of ridge subduction and slab window tectonics". [91] That is, a slab window — and a single subducted ridge can give rise to multiple slab windows — can provide adequate magmatism without having to invoke a hotspot ...
The HSZ slab is divided into two main segments, the western and eastern, with the division between them running roughly north–south through central Crete. [1] The Wadati–Benioff zone for the western segment dips at about 30° over a depth range of 20–100 km and 45° from 100 to 150 km. [ 7 ] The boundary between the two is interpreted to ...