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Showing 1 to 9 of 9 for “"Accretionary wedge"”.
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Field-based Constraints on the Origin of the Benton Uplift, Ouachita Mountains
… Paleozoic strata were incorporated into an accretionary wedge as the Sabine terrane approached the North American plate. Folds and thrust faults in the Ouachita Mountains generally verge north due to tectonic transport of an accretionary wedge from south to north. Structures in the Benton …
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Analysis of the central Hawke's Bay sector of the Late Neogene forearc basin, Hikurangi margin, New Zealand
… domain comprises the inboard margin of the accretionary wedge, and is characterised by imbricate reverse and thrust faults, and associated folding. The uppermost parts of the accretionary wedge are currently undergoing gravitationally-induced collapse, expressed as deep-seated landslides and …
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Geology of an Archean Greenstone Belt at Point Lake, Northwest Territories, Canada
… Slave Province, in which oceanic crust and an accretionary wedge were scraped off an eastward subducting plate. The supracrustal sequence consists of a west-verging fold-and-thrust belt which contains metamorphosed graywacke turbidites, ultramafic and gabbroic rocks, pillow basalts, limestone, …
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Sediment incorporation into continental arc systems and paleogeography of the western North American Cordillera: Insights from the North Cascades, Washington
… signatures similar to coeval forearc and/or accretionary-wedge units. The Napeequa Schist samples reveal Triassic protolith ages and radiogenic Nd- and Hf-isotope compositions that reflect its oceanic arc provenance. The main bodies of incorporated sediment are represented by the Skagit and …
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Centrifuge Modelling Study of Contrasting Structural Styles in the Salt Range and the Potwar Plateau, Pakistan
… collapse and lateral spreading of a “hinterland wedge” which simulates overriding by the Himalayan orogen (above the Main Boundary Thrust). The models of the central SR/PP show that the accretionary wedge develops a prominent culmination structure with fault-bend fold geometry over the frontal …
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Applications of Elastic Modeling, Thermobarometry, and Thermal History Modeling to (Ultra)high-Pressure Metamorphic Rocks
… may be incorporated into the subduction zone accretionary wedge and exhumed, thereby providing a direct records of subduction zone conditions and processes. This PhD research is focused on the determination of pressure (P) – temperature (T) conditions of exhumed (U)HP subduction zone …
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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 …
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Different styles of deformation of the fore-arc wedge along the Chilean convergent margin : insights from 3D numerical experiments
The styles of deformation of the fore-arc wedges along the Chilean convergent margin are observed to vary significantly, despite similar plate kinematic conditions. Here, I focus on the analysis of fore-arc deformation on two regions along the Chilean convergent margin at 20°-24°S and 37°-42°S. …
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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 …