The Upper Crustal P-wave Velocity Structure of Newberry Volcano, Central Oregon
| dc.contributor.author | Beachly, Matthew William, 1986- | |
| dc.date.accessioned | 2011-08-04T22:11:58Z | |
| dc.date.available | 2011-08-04T22:11:58Z | |
| dc.date.issued | 2011-06 | |
| dc.description | xii, 98 p. : ill. (some col.) | en_US |
| dc.description.abstract | The 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.sponsorship | Committee in charge: Emilie E.E. Hooft, Chairperson; Douglas R. Toomey, Member; Katharine V. Cashman, Member | en_US |
| dc.identifier.uri | https://hdl.handle.net/1794/11475 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | University of Oregon | en_US |
| dc.relation.ispartofseries | University of Oregon theses, Dept. of Geological Sciences, M.S., 2011; | |
| dc.subject | Geophysics | en_US |
| dc.subject | Arrival | en_US |
| dc.subject | Newberry Volcano (Or.) | en_US |
| dc.subject | Secondary | en_US |
| dc.subject | Seismic | en_US |
| dc.subject | Tomography | en_US |
| dc.subject | Volcanoes | en_US |
| dc.title | The Upper Crustal P-wave Velocity Structure of Newberry Volcano, Central Oregon | en_US |
| dc.type | Thesis | en_US |