back-arc basin

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back-arc basin

[′bak‚ärk ‚bās·ən]
(geology)
The region (small ocean basin) between an island arc and the continental mainland formed during oceanic plate subduction, containing sediment eroded from both.
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The shallow marine to subaerial sedimentary and volcanic sequences of the Silurian (Llandoverian to Pridolian) Mascarene belt, lying to the northwest of the Kingston belt, are interpreted to have been deposited in a backarc basin that opened behind the Kingston arc (Fyffe et al.
According to Schellart (2005), decreased plate velocities or convergence rates would induce slab rollback, with subduction retreat in a seaward direction, that in turn produces backarc or intra-arc extension in the overriding plate, and generated trench parallel normal faults trending N 130[degrees] E.
1994); this process produces in the central Mediterranean a diffuse area of deformation and fragmentation of lithosphere in subplates and includes a varied complexity of tectonic patterns such as subduction, backarc spreading, rifting, thrusting, normal and strike-slip faulting and volcanism.
D and Tarney J (1984) Geochemical characteristic of basaltic volcanism within backarc basins.
The Tambo Grande deposits are in a very similar setting to the Santa Elena occurrence, and given that both are in what appears to be an oceanic backarc setting, this district may be a model for Santa Elena.
The author employs several collision models to support his findings and to explain why the traditional model of a backarc shortening above an eastwardly dipping subduction zone does not fit current data.
Reverse Thrusting Faults 1 Kendeng BackArc Z133 R 7.
Deep sea research in subduction zones, spreading centres and backarc basins, pp.
However, the ascent of such small volumes of melt is mechanically problematic (see Murphy 2006) and so alkalic magmas in arc settings tend to be restricted to specialized settings, such as local rift zones within the arc or backarc region.
2]O on crystallization of mid-ocean ridge and backarc basin magmas.
1992: Backarc thrust faulting and tectonic uplift along the Caribbean sea coast during April 22, 1991 Costa Rica Earthquake.