Seismic studies of subducted lithosphere

This dissertation investigates dynamic processes in the mantle using source parameters, waveforms, and travel times associated with deep-focus earthquakes. First, I systematically determined the focal mechanisms and depths of all large-to-moderate sized earthquakes that occurred along the Kuril-Kamchatka in the past 30 years. My results show that the configuration of the subducting slab and the state of strain within the subducted lithosphere are highly variable along both the strike and dip. In particular, I observed down-dip compressional strain in the northern and central portions of the arc between depths of 200 and 650 km. In these regions, deformation of the subducted slab near the base of the upper mantle is delineated by seismicity, probably in response to resistance encountered near the 670-km discontinuity.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Geology

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Glennon, Mary Ann

Contributors dc:contributor

• Chen, Wang-Ping

• Geophysics

Statement dc:rights

• Copyright 1994 Glennon, Mary Ann

Language dc:language

eng

Identifier

AAI9416362
(UMI)AAI9416362

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/22310