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Showing 1 to 15 of 15 for “"accretionary prism"”.
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Subsurface Structure, Stratigraphy, and Hydrocarbon Basin Modeling of the Barbados Accretionary Prism
The Barbados Accretionary prism (BAP) is located along the eastern edge of the Caribbean plate and formed during the Late Cretaceous to Recent by westward subduction of Cretaceous oceanic crust of the Atlantic Ocean beneath the Lesser Antilles volcanic arc. The 300-km-width of the BAP over an …
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The structural evolution of an ancient accretionary prism in the Damara Belt, Namibia
… these tectonostratigraphic terranes formed in an accretionary prism along an ancient subduction margin. The structures in the SMZ are the result of progressive deformation, inferred to have initiated under low-grade metamorphic conditions (D₁) and evolved through prograde to peak metamorphism …
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The metamorphic evolution of an ancient accretionary prism in the southern zone of the Damara Belt in Namibia
… with intercalated mafic rocks, is in an accretionary prism above a subduction zone, where the accreted material is also subjected to high pressure – low temperature metamorphic conditions and deformation to high strains. This has been suggested as the origin of the Southern Zone. Samples …
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Fluid Budget of Metasedimentary Rocks from a Tertiary Accretionary Prism and Connections to Seismicity, Olympic Peninsula, Northwest Washington State
… dehydration reactions and fluid movement in accretionary prisms have been linked to the recently discovered episodic tremor and slip (ETS) earthquake events along subduction zones, but prior studies lack the detail to effectively test the hypothesis that fluid flow triggers ETS events. I …
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Tectonostratigraphic evolution of the Sinu accretionary prism and Lower Magdalena forearc basin formed above a shallow-dipping subduction zone, Caribbean margin of Colombia
… of Colombia that includes both its offshore accretionary prism (Sinu belt) and its overlying deep (8-9 km) and wide (150-200 km) forearc basin (Lower Magdalena basin, LMB). Based on 29000 earthquake relocations, interpretations of ~1200 km of offshore deep-penetration seismic reflection lines …
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Morphology and structure of the accretionary prism offshore North Sumatra, Indonesia and offshore Kodiak Island, USA : a comparison to seek a link between prism formation and hazard potential
… large earthquakes is predicted. Studies of the accretionary prism offshore of northern Sumatra, 1-7°N and 92-97°E, reveal a steep outer slope (5-12°), a plateau ~100-120 km wide, and a steep inner slope adjacent to the Aceh Basin. Three primary structural zones are consistent along strike where …
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Kinematics and Dynamics of Continental Deformation
… kinematics at the northern edge of the Makran accretionary prism are investigated using a combination of geodetic and geomorphological observations, addressing the long-standing tectonic problem of how the right-lateral shear taken up by strike-slip faulting in the Sistan Suture Zone in eastern …
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Petrogenesis and thermal history of the Kunlun Batholith, Northern Tibet
… Permian batholith, and the massive Songban-Ganzi accretionary prism. Subduction culminated in collision at about 200 Ma. Post tectonic granites were emplaced around 190 Ma. Initial Sr ratios for the granitoids range from .7074 to .7130, and support the geochemical modelling which suggests that …
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Fluid-mobile element cycling (halogens, boron, lithium) and sourcing through the Costa Rican convergent margin
… of the subducting slab. Seepage through the accretionary prism and incorporation into arc magmas are the primary outputs for fluids to leave the convergent margin; however, poor characterization of fluid-mobile element loss through the forearc has made it difficult to develop mass balance …
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Structure, Stratigraphy and Hydrocarbon Potential of the Colombian Caribbean Margin and Tsunamigenic Hazards in the Western Caribbean and the South China Sea
… subduction of the Caribbean plate has formed an accretionary prism defining the edge of the overriding South American plate. This dissertation focusses on the late Mesozoic to recent, tectonic, structural, and stratigraphic history of the deepwater portion of the region, with an emphasis on …
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The sedimentation and provenance of the Lower Old Red Sandstone Greywacke Conglomerate, southern Midland Valley, Scotland
… the: i) culmination of a rising fore-arc and accretionary prism (Leeder et al. 1983), ii) time of emplacement between the northern section of the Southern Uplands and the Midland Valley (Thirlwall, 1988), or iii) age of the emplacement of the Southern Uplands over a missing fore-arc along a …
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Sedimentpetrographische, mineralchemische und geochronologische Untersuchungen am Detritus neoproterozoischer und devonischer Siliziklastika im westlichen Südural
… complexes at the rear of the collisional accretionary complex as well as volcanosedimentary series of the Magnitogorsk arc. Light and heavy mineral distribution as well as the variation of the chemical composition of minerals did not reveal any significant difference during the period of …
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Modelling Viscous Flow and Elastic Deformation in Fold-Thrust Belts and Magmatic Intrusions
… thickening. I apply the model to the Makran accretionary prism and the Indo-Burman Ranges, and show that for the Makran flexure is important, while in the Indo-Burman Ranges the incoming sediment thickness has a first-order control on topography. The propagation of shallow magmatic intrusions …
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In Situ Compressional Wave Velocity Across An Exposed Brittle Fault Zone
… large reflection coefficients observed across accretionary prism faults can be explained by fracturing, brecciation and clay content without elevated pore pressures. Comparison with a refraction study across the Punchbowl Fault shows a similar structural zonation of these two well-studied …
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The Thermal and Fluid Environment of the Cascadia Subduction Zone, Southern Washington State
… flow. On an east-west profile of the Cascadia accretionary prism, a total of 251 heat flow measurements over water depths from 550 to 2600 meters captured a wide range of seafloor thermal environments. The deployment chronology illuminated large differences in measured temperature profiles due …