Subducted seamounts and recent earthquakes beneath the central cascadia forearc

Geology

Volumn 40, Issue 2, 2012, Pages 103-106

  Tréhu, Anne M ^a   Blakely, Richard J ^b   Williams, Mark C ^a  

^a OREGON STATE UNIVERSITY   (United States)

^b U S GEOLOGICAL SURVEY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACCRETIONARY COMPLEX; CASCADIA; DEFORMATION FRONT; EARTHQUAKE ACTIVITY; FOREARC; HYDRATE STABILITIES; MAGNETIC ANOMALIES; PLATE BOUNDARIES; SEISMIC VELOCITY MODELS; SLOPE MORPHOLOGY;

EARTHQUAKES; GAS HYDRATES; METAMORPHIC ROCKS; SLOPE STABILITY; THREE DIMENSIONAL;

SUBMARINE GEOLOGY;

ACCRETIONARY PRISM; DEFORMATION; EARTHQUAKE; FOREARC BASIN; JUAN DE FUCA PLATE; PLATE BOUNDARY; SEAMOUNT; SEISMIC VELOCITY; SUBDUCTION ZONE; SUBSIDENCE; UPLIFT;

CASCADIA BASIN; PACIFIC OCEAN;

EID: 84863396805     PISSN: 00917613     EISSN: 19432682     Source Type: Journal    
DOI: 10.1130/G32460.1     Document Type: Article

References (29)

1. Atwater, B.F., Satoko, M.R., Satake, K., Tsuji, Y., Ueda, K., and Yamaguchi, D.K., 2005, The orphan tsunami of 1700-Japanese clues to a parent earthquake in North America: U.S. Geological Survey Professional Paper 1707, 144 p.
2. Bangs, N.L.B., Gulick, S.P.S., and Shipley, T.H., 2006, Seamount subduction erosion in the Nankai Trough and its potential impact on the seismogenic zone: Geology, v. 34, p. 701-704, doi:10.1130/G22451.1.
3. Barckhausen, U., Roeser, H.A., and von Huene, R., 1998, Magnetic signature of upper plate structures and subducting seamounts at the convergent margin off Costa Rica: Journal of Geophysical Research, v. 103, p. 7079-7093, doi:10.1029/98JB00163.
4. Burgette, R.J., Weldon, R.J., II, and Schmidt, D.A., 2009, Interseismic uplift rates for western Oregon and along strike variation in locking on the Cascadia subduction zone: Journal of Geophysical Research, v. 114, B01408, doi:10.1029/2008JB005679.
5. Cloos, M., 1992, Thrust-type subduction-zone earthquakes and seamount asperities: A physical mode for seismic rupture: Geology, v. 20, p. 601-604, doi:10.1130/0091-7613(1992)020<0601:TTSZEA>2.3.CO;2.
6. Dominguez, S., Lallemand, S.E., Malavieille, J., and von Huene, R., 1998, Upper plate deformation associated with seamount subduction: Tectonophysics, v. 293, p. 207-224, doi:10.1016/S0040-1951(98)00086-9.
7. Fleming, S., and Tréhu, A.M., 1999, Crustal structure beneath the central Oregon convergent margin from potential field modeling: Evidence for a buried basement ridge in local contact with a seaward-dipping backstop: Journal of Geophysical Research, v. 104, p. 20431-20447, doi:10.1029/1999JB900159.
8. Gardner, T., Marshall, J., Merritts, D., Bee, B., Burgette, R., Burton, E., Cooke, J., Kehrwald, N., Protti, M., Fisher, D., and Sak, P., 2001, Holocene forearc block rotation in response to seamount subduction, southeastern Peninsula de Nicoya, Costa Rica: Geology, v. 29, p. 151-154, doi:10.1130/0091-7613 (2001)029<0151:HFBRIR>2.0.CO;2.
9. Gerdom, M., Tréhu, A.M., Flueh, E.R., and Klaeschen, D., 2000, The continental margin off Oregon from seismic investigations: Tectonophysics, v. 329, p. 79-97, doi:10.1016/S0040-1951(00)00190-6.
10. Hu, Y., and Wang, K., 2008, Coseismic strengthening of the shallow portion of the subduction fault and its effects on wedge taper: Journal of Geophysical Research, v. 113, B12411, doi:10.1029/2008JB005724.
11. Husen, S., Kissling, E., and Quintero, R., 2002, Tomographic evidence for a subducted seamount beneath the Gulf of Nicoya, Costa Rica: The cause of the 1990 Mw = 7.0 Gulf of Nicoya earthquake: Geophysical Research Letters, v. 29, 1238, doi:10.1029/2001GL014045.
12. Kodaira, S., Takahashi, N., Nakanishi, A., Miura, S., and Kaneda, Y., 2000, Subducted seamount imaged in the rupture zone of the 1946 Nankaido earthquake: Science, v. 289, p. 104-106, doi:10.1126/science.289.5476.104.
13. Lallemand, S., Culotta, R., and von Huene, R., 1989, Subduction of the Daiichi Kashima seamount in the Japan trench: Tectonophysics, v. 160, p. 231- 247, doi:10.1016/0040-1951(89)90393-4.
14. McCaffrey, R., Qamar, A.I., King, R.W., Wells, R., Khazaradze, G., Williams, C.A., Stevens, C.W., Vollick, J.J., and Zwick, P.C., 2007, An update of Quaternary faults of central and eastern Oregon: Geophysical Journal International, v. 169, p. 1315- 1340, doi:10.1111/j.1365-246X.2007.03371.x.
15. McNeill, L.C., Goldfinger, C., Kulm, L.D., and Yeats, R.S., 2000, Tectonics of the Neogene Cascadia forearc basin: Investigations of a deformed late Miocene unconformity: Geological Society of America Bulletin, v. 112, p. 1209-1224, doi:10.1130/0016-7606(2000)112<1209:TOTNCF>2.0.CO;2.
16. Mochizuki, K., Yamada, T., Shinohara, M., Yamanaka, Y., and Kanazawa, T., 2008, Weak interplate coupling by seamounts and repeating M~7 earthquakes: Science, v. 321, p. 1194-1197, doi:10.1126/science.1160250.
17. Roberts, C.W., Blakely, R.J., and Finn, C., 1997, Preliminary merged aeromagnetic map of Oregon: U.S. Geological Survey Open-File Report 97- 0440, 2 sheets, scale 1:500,000, 1 table.
18. Ryan, W.B.F., Carbotte, S.M., Coplan, J.O., O'Hara, S., Melkonian, A., Arko, R., Weissel, R.A., Ferrini, V., Goodwillie, A., Nitsche, F., Bonczkowski, J., and Zemsky, R., 2009, Global multiresolution topography synthesis: Geochemistry Geophysics Geosystems, v. 10, Q03014, doi:10.1029/2008GC002332.
19. Sandwell, D.T., and Smith, W.H.F., 2009, Global marine gravity from retracked Geosat and ERS-1 altimetry: Ridge segmentation versus spreading rate: Journal of Geophysical Research, v. 114, B01411, doi:10.1029/2008JB006008.
20. Scholz, C.H., and Small, C., 1997, The effect of seamount subduction on seismic coupling: Geology, v. 25, p. 487-490, doi:10.1130/0091-7613(1997)025<0487:TEOSSO>2.3.CO;2.
21. Singh, S., Hananto, N., Mukti, M., Robinson, D.P., Das, S., Chauhan, A., Carton, H., Gratacos, B., Midnet, S., Djajadihardha, Y., and Harjono, H., 2011, Aseismic zone and earthquake segmentation associated with a deep subducted seamount in Sumatra: Nature Geoscience, v. 4, p. 308- 311, doi:10.1038/ngeo1119.
22. Snavely, P.D., MacLeod, N.S., and Wagner, H.C., 1968, Tholeiitic and alkalic basalts of the Eocene Siletz River Volcanics, Oregon Coast Range: American Journal of Science, v. 266, p. 454-481, doi:10.2475/ajs.266.6.454.
23. Torres, M.E., Embley, R.W., Merle, S.G., Tréhu, A.M., Collier, R.W., Suess, E., and Heeschen, K.U., 2009, Methane sources feeding cold seeps on the shelf and upper continental slope off central Oregon, USA: Geochemistry Geophysics Geosystems, v. 10, Q11003, doi:10.1029/2009GC002518.
24. Tréhu, A.M., Asudeh, I., Brocher, T.M., Luetgert, J., Mooney, W.D., Nabelek, J.L., and Nakamura, Y., 1994, Crustal architecture of the Cascadia forearc: Science, v. 266, p. 237-243, doi:10.1126/science.266.5183.237.
25. Tréhu, A.M., Lin, G., Maxwell, E., and Goldfinger, C., 1995, A seismic reflection profile across the Cascadia subduction zone offshore central Oregon: New constraints on the deep crustal structure and on the distribution of methane in the accretionary prism: Journal of Geophysical Research, v. 100, p. 15101-15116, doi:10.1029/95JB00240.
26. Tréhu, A.M., Braunmiller, J., and Nabelek, J.L., 2008, Probable low-angle thrust earthquakes on the Juan de Fuca-North America plate boundary: Geology, v. 36, p. 127-130, doi:10.1130/G24145A.1.
27. von Huene, R., Ranero, C.R., and Weinrebe, W., 2000, Quaternary convergent margin tectonics of Costa Rica, segmentation of the Coco Plate and central American volcanism: Tectonics, v. 19, p. 314- 334, doi:10.1029/1999TC001143.
28. Williams, M.C., Tréhu, A.M., and Braunmiller, J., 2011, Seismicity at the Cascadia plate boundary beneath the Oregon continental shelf: Seismological Society of America Bulletin, v. 101, p. 940-950, doi:10.1785/0120100198.
29. Zelt, C.A., and Barton, P.J., 1998, 3-D seismic refraction tomography: A comparison of two methods applied to data from the Faeroe Basin: Journal of Geophysical Research, v. 103, p. 7187-7210, doi:10.1029/97JB03536.