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- W4313408340 endingPage "164" @default.
- W4313408340 startingPage "147" @default.
- W4313408340 abstract "Abstract 1D/2D data-based studies of active spreading centres brought the knowledge of extension rate-dependent stretching-dominated v. buoyancy-dominated spreading. 3D reflection seismic data from the extinct centre of an initial oceanic corridor in the Caribbean allow us to see an along-strike transition between stretching- and buoyancy-dominated spreading where the spreading through detachment faulting is a precursor to the magma-assisted spreading. Studying progressively more evolved portions of the spreading centre, going from its end towards its centre, we see a progressively higher ascent of the asthenosphere, which heats the developing core complex in the exhuming footwall of the initial stretching-dominated system. The asthenospheric ascent is associated with thermal weakening of the core complex, which eventually results in ductile deformation reaching the upper portion of the complex. Subsequently, the core complex is penetrated by the dyke located at the top of the asthenospheric body. The dyke, which subsequently evolves to a diapir-shaped body, reaches the sea floor and establishes a magma-assisted steady-state seafloor spreading. These observations lead to a model explaining the initiation of the magma-assisted spreading in the initial oceanic corridor. Furthermore, they also improve our knowledge of multiple interacting mechanisms involved in the breakup of the last continental lithospheric layer, subsequent disorganized spreading and younger organized spreading." @default.
- W4313408340 created "2023-01-06" @default.
- W4313408340 creator A5046263990 @default.
- W4313408340 creator A5091010642 @default.
- W4313408340 date "2023-03-03" @default.
- W4313408340 modified "2023-10-18" @default.
- W4313408340 title "Along-strike magma-poor/magma-rich spreading transitions" @default.
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