HR: 0830h
AN: G41A-0193
TI: Determination of Scotia - South America Relative Plate Motion and Crustal Deformation From GPS Geodesy
AU: * Smalley, R
EM: smalley@ceri.memphis.edu
AF: Center for Earthquake Research and Information, University of Memphis, 3890 Central Avenue, Memphis, TN 38152-3050 United States
AU: Bevis, M
EM: bevis@soest.hawaii.edu
AF: School of Ocean, Earth and Space Technology, University of Hawaii, 1680 East West Road Post Building #602, Honolulu, HI 96822 United States
AU: Kendrick, E
EM: kendrick@soest.hawaii.edu
AF: School of Ocean, Earth and Space Technology, University of Hawaii, 1680 East West Road Post Building #602, Honolulu, HI 96822 United States
AU: Dalziel, I
EM: ian@UTIG.IG.UTEXAS.EDU
AF: University of Texas at Austin, Institute for Geophysics University of Texas at Austin 4412 Spicewood Springs Road, Building 600, Austin, TX 78759 United States
AU: Taylor, F
EM: fred@utig.ig.utexas.edu
AF: University of Texas at Austin, Institute for Geophysics University of Texas at Austin 4412 Spicewood Springs Road, Building 600, Austin, TX 78759 United States
AU: Laur¡a, E
EM: jdivgeod@mapas.igm.gov.ar
AF: Instituto Geogr fico Militar de Argentina, Cabildo 301 or 381, Buenos Aires, 1426 Argentina
AU: Barriga, R
AF: Instituto Geogr fico Militar de Chile, Nueva Santa Isabel 1640, Santiago, Chile
AU: Casassa, G
EM: gcasassa@ona.fi.umag.cl
AF: Universidad de Magallanes, Direcci¢n de Programas Ant rticos Instituto de Patag¢nia, Punta Arenas, Chile
AU: Olivero, E
EM: eolivero@satlink.com
AF: Centro Austral de Investigaciones Cientificas, Av. Malvinas Argentinas s/n Caja de Correo 92, Ushuaia, T.d Fuego, 9410 Argentina
AU: Piana, E
EM: arqueologia@tierradelfuego.org.ar
AF: Centro Austral de Investigaciones Cientificas, Av. Malvinas Argentinas s/n Caja de Correo 92, Ushuaia, T.d Fuego, 9410 Argentina
AB: We use Global Positioning System measurements to determine relative plate movements and crustal deformation across the Scotia - South America plate boundary. Our results clearly show active crustal deformation along the South America - Scotia transform boundary in eastern Tierra del Fuego. The 160 km subaerial section of the plate boundary there, to first order, is concentrated on a narrow region best modeled by a simple east-west oriented strike-slip plate boundary. We find no evidence for a significant component of active transpression or transtension between the South America and Scotia plates along this section of the plate boundary. The GPS data also enable us to estimate the first South America -Scotia pole that does not depend on closure for determination of the rotation rate.
DE: 1206 Crustal movements--interplate (8155)
DE: 1243 Space geodetic surveys
SC: G
MN: 2001 AGU Fall Meeting