Elevated fluid pressure and extreme mechanical weakness of a plate boundary thrust, Nankai Trough subduction zone

Geology

Volumn 37, Issue 8, 2009, Pages 679-682

  Tobin, Harold J ^a   Saffer, Demian M ^b  

^a UNIVERSITY OF WISCONSIN MADISON   (United States)

^b PENNSYLVANIA STATE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EFFECTIVE STRESS; FAULT DIP; FLUID PRESSURES; HYDROLOGICAL MODELS; IN-SITU DATA; INTERVAL VELOCITY; KEY PARAMETERS; PLATE BOUNDARIES; PLATE INTERFACES; PORE FLUID PRESSURE; SEISMIC REFLECTION SURVEY; SOUTHWESTERN JAPAN; STICK-SLIP; STUDY AREAS; SUBDUCTION ZONES; TSUNAMIGENIC; UNDRAINED;

HYDRAULIC MODELS; PORE PRESSURE; SEISMOLOGY; SLIP FORMING;

SHEAR STRENGTH;

EXTENSIONAL TECTONICS; FAULT; FLUID PRESSURE; PLATE BOUNDARY; PORE PRESSURE; QUANTITATIVE ANALYSIS; SEISMIC REFLECTION; SEISMIC SURVEY; SEISMIC VELOCITY; SEISMIC ZONE; SEISMOLOGY; SHEAR STRENGTH; SUBDUCTION ZONE; THRUST;

NANKAI TROUGH; PACIFIC OCEAN;

EID: 69649104143     PISSN: 00917613     EISSN: 00917613     Source Type: Journal    
DOI: 10.1130/G25752A.1     Document Type: Article

References (25)

1. Bangs, N.L., Westbrook, G.K., Ladd, J., and Buhl, P., 1990, Seismic velocities from the Barbados Ridge complex: Indicators of high pore fl uid pressures in an accretionary complex: Journal of Geophysical Research, v. 95, no. B6, p. 8767-8782, doi: 10.1029/JB095iB06p08767.
2. Bangs, N.L., Shipley, T., Gulick, S., Moore, G., Kuramoto, S., and Nakamura, Y., 2004, Evolution of the Nankai Trough décollement from the trench into the seismogenic zone: Inferences from three-dimensional seismic reflection imaging: Geology, v. 32, p. 273-276, doi: 10.1130/G20211.2.
3. Brown, K.M., Kopf, A., Underwood, M.B., and Weinberger, J.L., 2003, Compositional and fl uid pressure controls on the state of stress on the Nankai subduction thrust: A weak plate boundary: Earth and Planetary Science Letters, v. 214, p. 589-603, doi: 10.1016/S0012-821X(03)00388-1.
4. Byrne, T., and Fisher, D., 1990, Evidence for a weak and overpressured décollement beneath sediment-dominated accretionary prisms: Journal of Geophysical Research, v. 95, no. B6, p. 9081-9097, doi: 10.1029/JB095iB06p09081.
5. Costa-Pisani, P., Reshef, M., and Moore, G., 2005, Targeted 3-D prestack depth imaging at Legs 190-196 ODP drill sites (Nankai Trough, Japan): Geophysical Research Letters, v. 32, L20309, doi: 10.1029/2005GL024191.
6. Davis, D.M., Suppe, J., and Dahlen, F.A., 1983, Mechanics of fold-and-thrust belts and accretionary wedges: Journal of Geophysical Research, v. 88, p. 1153-1172, doi: 10.1029/JB088iB02p01153.
7. Erickson, S.N., and Jarrard, R.D., 1998, Velocity-porosity relationships for water-saturated siliciclastic sediments: Journal of Geophysical Research, v. 103, no. B12, p. 30,385-30,406, doi: 10.1029/98JB02128.
8. Gamage, K., and Screaton, E.J., 2006, Characterization of excess pore pressures at the toe of the Nankai accretionary complex, Ocean Drilling Program Sites 1173, 1174, and 808: Results of one-dimensional modeling: Journal of Geophysical Research, v. 111, B04103, doi: 10.1029/ 2004JB003572.
9. Hamilton, E., 1978, Sound velocity-density relations in sea-floor sediments and rocks: Acoustical Society of America Journal, v. 63, p. 366-377, doi: 10.1121/1.381747.
10. Hickman, S., Zoback, M., and Ellsworth, W., 2004, Introduction to special section: Preparing for the San Andreas fault observatory at depth: Geophysical Research Letters, v. 31, L12S01, doi: 10.1029/ 2004GL020688.
11. Hoffman, N.W., and Tobin, H.J., 2004, An empirical relationship between velocity and porosity for underthrust sediments in the Nankai Trough accretionary prism, in Mikada, H., et al., Proceedings of the Ocean Drilling Program, Scientific results, Volume 190/196: College Station, Texas, Ocean Drilling Program: http://www-odp.tamu.edu/ publications/190196SR/355/355.htm.
12. Hubbert, M.K., and Rubey, W.W., 1959, Mechanics of fluid-filled porous solids and its application to overthrust faulting: Geological Society of America Bulletin, v. 70, p. 115-166, doi: 10.1130/ 0016-7606(1959)70[115:ROFPIM]2.0.CO;2.
13. Hyndman, R.D., Moore, G.F., and Moran, K., 1993, Velocity, porosity, and pore-fluid loss from the Nankai subduction zone accretionary prism, in Hill, I.A., et al., Proceedings of the Ocean Drilling Program, Scientific results, Volume 131: College Station, Texas, Ocean Drilling Program, p. 211-220.
14. Moore, G.F., and 26 others, 2001, New insights into deformation and fluid flow processes in the Nankai Trough accretionary prism: Results of Ocean Drilling Program Leg 190: Geochemistry Geophysics Geosystems, v. 2, 1058, doi: 10.1029/2001GC000166.
15. Moore, J.C., and Saffer, D.M., 2001, Updip limit of the seismogenic zone beneath the accretionary prism of southwest Japan: An effect of diagenetic to low-grade metamorphic processes and increasing effective stress: Geology, v. 29, p. 183-186, doi: 10.1130/ 0091-7613(2001)029<0183:ULOTSZ>2.0.CO;2.
16. Moore, J.C., and Tobin, H.J., 1997, Estimated fluid pressures of the Barbados accretionary prism and adjacent sediments, in Shipley, T.H., et al., Proceedings of the Ocean Drilling Program, Scientific results, Volume 156: College Station, Texas, Ocean Drilling Program, p. 229-238.
17. Saffer, D.M., 2003, Pore pressure development and progressive dewatering in underthrust sediments at the Costa Rican subduction margin: Comparison with northern Barbados and Nankai: Journal of Geophysical Research, v. 108, no. B5, 2261, doi: 10.1029/2002JB001787.
18. Saffer, D.M., and Bekins, B.A., 1998, Episodic fluid flow in the Nankai accretionary complex: Timescale, geochemistry, flow rates, and fluid budget: Journal of Geophysical Research, v. 103, p. 30,351-30,370, doi: 10.1029/98JB01983.
19. Saffer, D.M., and Bekins, B.A., 2002, Hydrologic controls on the morphology and mechanics of accretionary wedges: Geology, v. 30, p. 271-274, doi: 10.1130/0091-7613(2002)030<0271:HCO TMA>2.0.CO;2.
20. Scholz, C.H., 1998, Earthquakes and friction laws: Nature, v. 391, p. 37-42, doi: 10.1038/34097.
21. Screaton, E., Saffer, D., Henry, P., Hunze, S., and Leg 190 Shipboard Scientific Party, 2002, Porosity loss within the underthrust sediments of the Nankai accretionary complex: Implications for overpressures: Geology, v. 30, p. 19-22, doi: 10.1130/0091-7613(2002)030<0019:PLWTUS >2.0.CO;2.
22. Suppe, J., 2007, Absolute fault and crustal strength from wedge tapers: Geology, v. 35, p. 1127-1130, doi: 10.1130/G24053A.1.
23. Tobin, H., and Kinoshita, M., 2006, NanTroSEIZE: The IODP Nankai Trough seismogenic zone experiment: Scientific Drilling, v. 2, p. 23-27, doi: 10.2204/iodp.sd.2.06.2006.
24. Tsuji, T., Tokuyama, H., Costa Pisani, P., and Moore, G., 2008, Effective stress and pore pressure in the Nankai accretionary prism off the Muroto Peninsula, southwestern Japan: Journal of Geophysical Research, v. 113, B11401, doi: 10.1029/2007JB005002.
25. Zoback, M., and 12 others, 1987, New evidence on the state of stress of the San Andreas fault system: Science, v. 238, p. 1105-1111, doi: 10.1126/science.238.4830.1105.