Results 141 to 150 of about 444 (185)
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Seismicity of the forearc marginal wedge (accretionary prism)
Journal of Geophysical Research: Solid Earth, 1982Three different types of seismic data have been examined for seismic events occurring within the zone called the accreted wedge or forearc marginal wedge that underlies the inner trench wall of some arcs. These types of data are (1) teleseismically recorded earthquakes that have been reported in the literature as occurring in major arc‐trench regions ...
Allen T. Chen +2 more
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Quaternary deposits on the South Barbados accretionary prism
Marine Geology, 1991Abstract A study of recent Quaternary deposits of the South Barbados prism has been carried out over a limited area close to the Venezuela margin. 3.5 kHz lines, submarine photographs and many piston and gravity cores have been collected throughout this area during the cruise of the Caracolante II .
J.C. Faugères +5 more
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Continental margin tectonics: Submarine accretionary prisms
Reviews of Geophysics, 1987Submarine accretionary prisms are sites of incipient mountain building where sediments and rocks of the deep ocean are uplifted, deformed, and ultimately transformed to continental crust. Accretionary prisms develop at sites of lithospheric convergence, that is, subduction zones.
J. Casey Moore, Eli A. Silver
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Plumbing accretionary prisms: effects of permeability variations
Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences, 1991Abstract Fault zones focus fluid expulsion in the muddy northern Barbados Ridge accretionary prism with fault-parallel permeabilities about 1000 times greater than intergranular permeabilities in the adjacent sediment. In the Oregon prism the low bedding-perpendicular permeability (due to mudstones) inhibits intergranular dewatering ...
Kevin M. Brown +5 more
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Kinematic models of dewatering accretionary prisms
Journal of Geophysical Research: Solid Earth, 1994Steady state two‐dimensional analytical solutions are derived for sediment velocity and rate of fluid expulsion in a thickening accretionary prism with smooth upper and lower surfaces. Two different kinematic assumptions lead to two similar sets of solutions. In one case, the sediment flow lines are assumed to diverge uniformly landward.
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Is the Southern Uplands of Scotland really an accretionary prism?
Geology, 1986We argue that there is little which demands the accretionary prism model for the widespread Silurian rocks of the Southern Uplands of Scotland (and Ireland). With new data from Ireland, we reinterpret these rocks as the turbidite fill of a successor basin that formed after the subduction of Iapetus oceanic crust finally stopped at the end of the ...
F. C. Murphy, D.H.W. Hutton
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A geodynamic model of the Southern Apennines accretionary prism
Terra Nova, 1996ABSTRACTThe Apennines comprise a Neogen—Quaternary accretionary prism that shows several anomalies with respect to classic alpine‐type mountain belts, namely (i) low elevation, (ii) a shallow new Moho below the core of the belt, (iii) high heat flow in the internal parts, (iv) mainly sedimentary cover involved in the prism, (v) a deep foredeep and (vi)
C. Doglioni +4 more
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Hydrogeological modeling of porous flow in the Oregon accretionary prism
Geology, 1989Venting of pore fluid was recently reported near the front of the Oregon accretionary prism and was directly measured at one of the venting sites during Alvin dives. In this study, the authors model the flow of pore fluid in the Oregon accretionaly prism.
Yaolin Shi +3 more
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Geochemistry of mud volcano fluids in the Taiwan accretionary prism
Applied Geochemistry, 2004Abstract Taiwan is located at the collision boundary between the Philippine Sea Plate and the Asian Continental Plate and is one of the most active orogenic belts in the world. Fluids sampled from 9 sub-aerial mud volcanoes distributed along two major geological structures in southwestern Taiwan, the Chishan fault and the Gutingkeng anticline, were ...
Chen-Feng You +4 more
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Geomorphological study on a clastic accretionary prism: The Nankai Trough
Island Arc, 1995Abstract The Nankai Trough, off southwest Japan, is one of the best sites for the study of geomorphic characteristics of a clastic accretionary prism. A recent multibeam survey over the central and eastern parts of the Nankai accretionary prism has revealed a large variation of the topography along the trough axis.
Kyoko Okino, Yukihiro Kato
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