Effects of Seamount Subduction on Tectonic Accretion, and Erosion, and Forearc Evolution: Discrete Element Simulations

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dc.contributor.advisorMorgan, Julia Ken_US
dc.creatorFoo, Wey Yien_US
dc.date.accessioned2019-05-17T13:22:41Zen_US
dc.date.available2019-05-17T13:22:41Zen_US
dc.date.created2017-12en_US
dc.date.issued2017-11-30en_US
dc.date.submittedDecember 2017en_US
dc.date.updated2019-05-17T13:22:41Zen_US
dc.description.abstractA series of deep imbricate thrust structures associated with a period of margin accretion, have been interpreted in seismic reflection data offshore Costa Rica. This interpretation for accretion is inconsistent with the long-term margin subsidence recorded in that setting. Using Discrete Element Method simulations, we test the idea that thinning of the incoming sedimentary blanket exposed underlying seamounts that interacted with the overriding plate, and drove a change in tectonic regime from margin accretion to erosion. Our modeling results show seamounts can enhance the rates of wedge growth, at least transiently, even as they cause erosion during later stages of forearc evolution. Seamounts also impart considerable changes to forearc structure as they pass by, rotating faults, initiating a cross-cutting backthrusts, activating landslides, and steepening the forearc slopes. We also show seamounts partitioning strain within the wedge by landward reactivation of structures, which may have implications to seismogenesis.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationFoo, Wey Yi. "Effects of Seamount Subduction on Tectonic Accretion, and Erosion, and Forearc Evolution: Discrete Element Simulations." (2017) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/105587">https://hdl.handle.net/1911/105587</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/105587en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectSeamountsen_US
dc.subjectSubduction Zonesen_US
dc.subjectForearcen_US
dc.subjectMaterial Transferen_US
dc.subjectEarthquakeen_US
dc.subjectDiscrete Element Method (DEM)en_US
dc.titleEffects of Seamount Subduction on Tectonic Accretion, and Erosion, and Forearc Evolution: Discrete Element Simulationsen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentEarth Scienceen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.majorGeophysicsen_US
thesis.degree.nameMaster of Scienceen_US
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