Understanding Canadian Cordillera crustal and upper-mantle structure with joint Bayesian inversion of receiver functions and surface-wave dispersion curves

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dc.contributor.advisorDettmer, Jan
dc.contributor.advisorGilbert, Hersh
dc.contributor.authorSmale, Jacquelyn
dc.contributor.committeememberEaton, David William S.
dc.contributor.committeememberLauer, Rachel M.
dc.date2020-11
dc.date.accessioned2020-08-27T22:27:14Z
dc.date.available2020-08-27T22:27:14Z
dc.date.issued2020-08-20
dc.description.abstractThe accretion of exotic terranes onto the stable Northern American craton during the formation of the Northern Canadian Cordillera (NCC) generated complex structure on a crustal and lithospheric scale. Without making significant model-parametrization assumptions, inverting for structure is challenging. The Bayesian approach quantifies uncertainty due to non-uniqueness of the solution and can avoid subjective choice in model parameterization. Jointly inverting receiver-functions and surface-wave dispersion curves constrains shear-wave velocity structure. With this inversion method, I study the spatial variability of major lithospheric discontinuities, specifically of the Mohoroviciˇ c discontinuity (Moho) and lithosphere-asthenosphere boundary (LAB), along a transect from Whitehorse to Toad River. Results show a flat Moho across the NCC at ∼ 34-km depth and a heterogeneous LAB with depths between 70- and 100-km depth. Beneath the LAB, I observe a significant low-velocity zone with shear-wave velocities as low as ∼ 3.0 km/s. Only the presence of partial melting of 1.5–2.5% can explain these Vs reductions.en_US
dc.identifier.citationSmale, J. (2020). Understanding Canadian Cordillera crustal and upper-mantle structure with joint Bayesian inversion of receiver functions and surface-wave dispersion curves (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/38122
dc.identifier.urihttp://hdl.handle.net/1880/112440
dc.language.isoengen_US
dc.publisher.facultyScienceen_US
dc.publisher.institutionUniversity of Calgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en_US
dc.subjectSeismologyen_US
dc.subjectBayesian Inferenceen_US
dc.subjectLithosphereen_US
dc.subjectNorthern Canadian Cordilleraen_US
dc.subjectJoint Inversionen_US
dc.subject.classificationGeophysicsen_US
dc.titleUnderstanding Canadian Cordillera crustal and upper-mantle structure with joint Bayesian inversion of receiver functions and surface-wave dispersion curvesen_US
dc.typemaster thesisen_US
thesis.degree.disciplineAnthropologyen_US
thesis.degree.grantorUniversity of Calgaryen_US
thesis.degree.nameMaster of Science (MSc)en_US
ucalgary.item.requestcopyfalseen_US
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