HR: 0800h
AN: G21C-0657    [Abstracts]
TI: A Revised Caribbean Plate Motion Model: GPS Geodetic Results From the Dominica NSF- REU Site
AU: * Fauria, K
EM: kfauria@uoregon.edu
AF: Dept. of Geological Sciences, University of Oregon, 1272 University of Oregon, Eugene, OR 97403, United States
AU: Styron, R H
EM: rstyron@uark.edu
AF: Dept. of Geosciences, University of Arkansas, 113 Ozark Hall, Fayetteville, AR 72701, United States
AU: James, S
EM: sjames@uark.edu
AF: Dept. of Geosciences, University of Arkansas, 113 Ozark Hall, Fayetteville, AR 72701, United States
AU: Turner, H L
EM: hturner@uark.edu
AF: Dept. of Geosciences, University of Arkansas, 113 Ozark Hall, Fayetteville, AR 72701, United States
AU: Ashlock, A
EM: andrew.ashlock@gmail.com
AF: Dept. of Geosciences, University of Arkansas, 113 Ozark Hall, Fayetteville, AR 72701, United States
AU: Cavness, C L
EM: ccavness@middlebury.edu
AF: Dept. of Geology, Middlebury College, Bicentennial Hall, Middlebury, VT 05753, United States
AU: Collier, X
EM: collier12@yahoo.com
AF: Dept. of Agriculture, University of Arkansas Pine Bluff, 1200 N University Dr., Pine Bluff, AR 71601, United States
AU: Feinstein, R
EM: rfeinst@uark.edu
AF: Dept. of Geosciences, University of Arkansas, 113 Ozark Hall, Fayetteville, AR 72701, United States
AU: Murphy, R
EM: rmurphy5@nd.edu
AF: Dept. of Civil Engineering and Geological Sciences, University of Notre Dame, 156 Fitzpatrick Hall, Notre Dame, IN 46556, United States
AU: Staisch, L
EM: staischl@carleton.edu
AF: Dept. of Geology, Carleton College, One North College Street, Northfield, MN 55057, United States
AU: Williams, B
EM: nikki50seminole@yahoo.com
AF: Dept. of Agriculture, University of Arkansas Pine Bluff, 1200 N University Dr., Pine Bluff, AR 71601, United States
AU: DeMets, C
EM: chuck@geology.wisc.edu
AF: Dept. of Geology and Geophysics, University of Wisconsin-Madison, 1215 W. Dayton St., Madison, WI 53706, United States
AU: Mattioli, G S
EM: mattioli@uark.edu
AF: Dept. of Geosciences, University of Arkansas, 113 Ozark Hall, Fayetteville, AR 72701, United States
AU: Jansma, P E
EM: pjansma@uark.edu
AF: Dept. of Geosciences, University of Arkansas, 113 Ozark Hall, Fayetteville, AR 72701, United States
AU: Cothren, J
EM: jcothre@uark.edu
AF: Dept. of Geosciences, University of Arkansas, 113 Ozark Hall, Fayetteville, AR 72701, United States
AB: Velocities from sixteen campaign GPS sites on the Caribbean island of Dominica are analyzed in combination with fifteen existing Caribbean GPS sites to further constrain Caribbean plate motion. High precision GPS geodesy was used to determine the site positions of 16 sites in Dominica between 2000 and 2007. All observations were obtained using dual-frequency, code-phase receivers and geodetic-quality antennae, primarily choke rings. Generally, three consecutive 24 hour observation days were acquired for each site at every epoch. Absolute point positions were obtained using GIPSY-OASIS II along with final, precise orbits, clocks, earth orientation parameters, and x-files from JPL. All site velocities are calculated relative to ITRF05 and legacy site velocities from elsewhere in the eastern and western stable Caribbean were transformed from ITRF00 to ITRF05 before inversion. The addition of Dominican GPS data from the 16 new sites resulted in no statistically significant (the 95% confidence level) change in the Caribbean Euler pole as recently published by DeMets et al., 2007. Our calculated pole is 35.929°N, 102.536° E, and rotating at a rate of .2610 degrees/m.yr. The updated rotation model verifies the previously published pole and supports the conclusion that within current error bounds, Dominica is part of the stable Caribbean plate, with residual motions on the order of only a few mm/yr.
DE: 1229 Reference systems
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
SC: Geodesy [G]
MN: 2007 Fall Meeting