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dc.contributor.authorBeachly, Matthew William, 1986-
dc.date.accessioned2011-08-04T22:11:58Z
dc.date.available2011-08-04T22:11:58Z
dc.date.issued2011-06
dc.identifier.urihttp://hdl.handle.net/1794/11475
dc.descriptionxii, 98 p. : ill. (some col.)en_US
dc.description.abstractThe upper-crustal seismic-velocity structure of Newberry volcano, central Oregon, is imaged using P-wave travel time tomography. The inversion combines a densely-spaced seismic line collected in 2008 with two USGS seismic experiments from the 1980s. A high-velocity ring (7 km EW by 5 km NS) beneath the inner caldera faults suggests an intrusive ring complex 200 to 500 m thick. Within this ring shallow low velocities (<2 km depth) are interpreted as caldera fill and a subsided block. High velocities below 2 km depth could be intrusive complexes. There appears to be a low-velocity body at 3-6 km depth beneath the center of the volcano. This region is poorly resolved in the inversion because the ray paths bend around the low-velocity body. The 2008 data also recorded a secondary arrival that may be a delayed P-wave interacting with the low-velocity body.en_US
dc.description.sponsorshipCommittee in charge: Emilie E.E. Hooft, Chairperson; Douglas R. Toomey, Member; Katharine V. Cashman, Memberen_US
dc.language.isoen_USen_US
dc.publisherUniversity of Oregonen_US
dc.relation.ispartofseriesUniversity of Oregon theses, Dept. of Geological Sciences, M.S., 2011;
dc.subjectGeophysicsen_US
dc.subjectArrivalen_US
dc.subjectNewberry Volcano (Or.)en_US
dc.subjectSecondaryen_US
dc.subjectSeismicen_US
dc.subjectTomographyen_US
dc.subjectVolcanoesen_US
dc.titleThe Upper Crustal P-wave Velocity Structure of Newberry Volcano, Central Oregonen_US
dc.typeThesisen_US


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