Possible emplacement of crustal rocks into the forearc mantle of the Cascadia Subduction Zone

Geophysical Research Letters

Volumn 30, Issue 23, 2003, Pages

  Calvert, Andrew J ^a   Fisher, Michael A ^b   Ramachandran, Kumar ^c   Tréhu, Anne M ^d  

^a SIMON FRASER UNIVERSITY   (Canada)

^b U S GEOLOGICAL SURVEY   (United States)

^c Geological Survey of Canada Sidney   (Canada)

^d OREGON STATE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

GEOLOGY; ROCKS; SEISMOLOGY; REFLECTION; SEISMIC WAVES; STRUCTURAL GEOLOGY; TECTONICS; VELOCITY;

CRUSTAL ROCKS; CRUSTAL SHEAR ZONE; CASCADIA SUBDUCTION ZONE; CONTINENTAL CRUSTS; NORTH AMERICAN PLATES; SEISMIC REFLECTION PROFILES; SEISMIC REFLECTORS; SERPENTINIZATION; SUBDUCTION EROSION; UPPERMOST MANTLE;

GEOPHYSICS; ROCKS;

EMPLACEMENT; FOREARC BASIN; MANTLE; PLATE TECTONICS; SEISMIC REFLECTION; SUBDUCTION ZONE;

CASCADIA SUBDUCTION ZONE; NORTH AMERICA; PACIFIC OCEAN;

EID: 1542755889     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/2003GL018541     Document Type: Article

References (21)

1. Bostock, M. G., R. D. Hyndman, S. Rondenay, and S. M. Peacock, An inverted continental Moho and the serpentinization of the forearc mantle, Nature, 417, 536-538, 2002.
2. Brocher, T. M., T. Parsons, A. M. Tréhu, C. M. Snelson, and M. A. Fisher, Seismic evidence for widespread serpentinized forearc upper mantle along the Cascadia margin, Geology. 31, 267-270, 2003.
3. Calvert, A. J., Seismic reflection constraints on imbrication and underplating of the northern Cascadia convergent margin, Can. J. Earth Sci., 33, 1294-1307, 1996.
4. Calvert, A. J., and R. M. Clowes. Deep, high amplitude reflections from a major shear zone above the subducting Juan de Fuca plate, Geology. 18, 1091-1094, 1990.
5. Clowes, R. M., M. T. Brandon, A. G. Green, C. J. Yorath, A. Sutherland Brown, E. R. Kanesewich, and C. Spencer, LITHOPROBE - southern Vancouver Island: Cenozoic subduction complex imaged by deep seismic reflections, Can. J. Earth Sci.. 28, 542-556, 1987a.
6. Clowes, R. M., C. J. Yorath, and R. D. Hyndman, Reflection mapping across the convergent margin of western Canada, Geophys. J. R. astr. Soc., 89, 79-84, 1987b.
7. Engebretson, D. C., R. G. Gordon, and A. Cox, Relative motions between oceanic and continental plates in the Pacific Basin, Geol. Soc. Am. Spec. Pap., 206, 1985.
8. Fisher, M. A.. et al., Seismic survey probes urban earthquake hazards in Pacific Northwest. Eos, 80, 13-17, 1999.
9. Graindorge, D., G. Spence, P. Charvis, J. Y. Collot, R. Hyndman, and A. M. Tréhu, Crustal structure beneath Strait of Juan de Fuca and southern Vancouver Island from seismic and gravity analyses, J. Geophys. Res., 108, 2484, doi:10.1029/2002JB001823, 2003.
10. Green, A. G., R. M. Clowes, C. J. Yorath, C. Spencer, E. R. Kanesewich, M. T. Brandon, and A. Sutherland Brown, Seismic reflection imaging of the subducting Juan de Fuca plate, Nature, 319, 210-213, 1986.
11. 20 contents, J. Geophys. Res., 108, 2029, doi:10.1029/2001JB001127, 2003.
12. Kurtz, R. D., J. M. De Laurier, and J. C. Gupta, A magnetotelluric sounding across the subducting Juan de Fuca plate, Nature, 321, 596-599, 1986.
13. Preston, L. A., K. C. Creager, R. S. Crosson, T. M. Brocher, and A. M. Tréhu, Intraslab earthquakes: Deyhdration of the Cascadia slab, Science, 302, 1197-1200, 2003.
14. Ramachandran, K., Velocity structure of S.W. British Columbia and N.W. Washington from 3-D non-linear seismic tomography, Ph.D. dissertation, University of Victoria, Victoria, 2001.
15. Salisbury, M., and R. Iulucci, GSC Atlantic/Dalhousie University rock properties database, http://www.gsc.nrcan.gc.ca/pubprod/rockprop, Geol. Surv. Can., Dartmouth, 2003.
16. Stanley, D., A. Villasenor, and H. Benz, Subduction zone and crustal dynamics of western Washington: A tectonic model for earthquake hazards evaluation, Open File Rep. 99-311, 64 pp., U.S. Geol. Surv., Reston, 1999.
17. Symons, N. P., and R. S. Crosson, Seismic velocity structure of the Puget Sound region from 3-D non-linear tomography, Geophys. Res. Lett., 24, 2593-2596, 1997.
18. Tréhu, A. M., T. M. Brocher, K. C. Creager, M. A. Fisher, L. A. Preston, G. Spence, and the SHIPS98 Working Group, Geometry of the subducting Juan de Fuca plate: New constraints from SHIPS98, Open File Rep. 02-0328, 25-32, U.S. Geol. Surv., Reston, 2002.
19. von Huene, R., and D. W. Scholl, Observations at convergent margins concerning sediment subduction, subduction erosion, and the growth of continental crust, Rev. Geophys., 29, 279-316, 1991.
20. Yorath, C. J., A. G. Green, R. M. Clowes, A. Sutherland Brown, M. T. Brandon, E. R. Kanesewich, R. D. Hyndman, and C. Spencer, Lithoprobe, southern Vancouver Island: Seismic reflection sees through Wrangellia to the Juan de Fuca plate, Geology, 13, 759-762, 1985.
21. Zhao, D., K. Wang, G. C. Rogers, and S. M. Peacock, Tomographic image of low P velocity anomalies above slab in northern Cascadia subduction zone, Earth Planets Space, 53, 285-293, 2001.