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Titolo:
Deformation across the Pacific-North America plate boundary near San francisco, California
Autore:
Prescott, WH; Savage, JC; Svarc, JL; Manaker, D;
Indirizzi:
US Geol Survey, Menlo Park, CA 94025 USA US Geol Survey Menlo Park CA USA94025 l Survey, Menlo Park, CA 94025 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
fascicolo: B4, volume: 106, anno: 2001,
pagine: 6673 - 6682
SICI:
0148-0227(20010410)106:B4<6673:DATPAP>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
WESTERN UNITED-STATES; RANGE PROVINCE; BAY-REGION; MOTION; BASIN; KINEMATICS; VELOCITIES; MODEL; SPACE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Prescott, WH Univ Calif Davis, Dept Geol, 174 Phys Geol Bldg,1 Shields Ave, Davis, CA 95616 USA Univ Calif Davis 174 Phys Geol Bldg,1 Shields Ave Davis CA USA 95616
Citazione:
W.H. Prescott et al., "Deformation across the Pacific-North America plate boundary near San francisco, California", J GEO R-SOL, 106(B4), 2001, pp. 6673-6682

Abstract

We have detected a narrow zone of compression between the Coast Ranges andthe Great Valley, and we have estimated slip rates for the San Andreas, Rodgers Creek, and Green Valley faults just north of San Francisco. These results are based on an analysis of campaign and continuous Global PositioningSystem (GPS) data collected between 1992 and 2000 in central California. The zone of compression between the Coast Ranges and the Great Valley is 25 km wide. The observations clearly show 3.8 +/-1.5 mm yr(-1) of shortening over this narrow zone. The strike slip components are best fit by a model with 20.8 +/-1.9 mm yr(-1) slip on the San Andreas fault, 10.3 +/-2.6 mm yr(-1) on the Rodgers Creek fault, and 8.1 +/-2.1 mm yr(-1) on the Green Valleyfault. The Pacific-Sierra Nevada-Great Valley motion totals 39.2 +/-3.8 mmyr(-1) across a zone that is 120 km wide (at the latitude of San Francisco). Standard deviations are one sigma. The geodetic results suggest a higherthan geologic rate for the Green Valley fault. The geodetic results also suggest an inconsistency between geologic estimates of the San Andreas rate and seismologic estimates of the depth of locking on the San Andreas fault. The only convergence observed is in the narrow zone along the border between the Great Valley and the Coast Ranges.

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Documento generato il 23/01/20 alle ore 03:53:33