Initial Publication Date: February 21, 2013

A Decade of Research Findings about the Seismogenic Zone Experiment

J. Casey Moore, Earth and Planetary Sciences, University of California, Santa Cruz

Schedule

Date: Tuesday, Mar 5

Time: This webinar will take place at 12:00 pm PST | 1:00 pm MST | 2:00 pm CST | 3:00 pm EST and will last for 90 minutes.

Format: Capacity is limited to 40 people, on a first come, first served basis. Registration has closed.

Platform:

  • We will use Adobe Connect for presentations, screen sharing, and instant chat.
  • Audio will be through a conference call line.
  • Web support will be through workspace web pages and a discussion board.

Topics

  • Detailed imaging of megasplay fault system from 3D seismic data of Nankai Trough
  • Properties of the subduction megathrust and their relationships to seismicity and great earthquakes
  • Constraints on the nature of the updip limit of subduction zeismogenic zones
  • Identification of pore pressure transients associated with seismicity
  • Site surveys for future drilling at Nankai (and new IODP drilling results)

Presenter

J. Casey Moore, Earth and Planetary Sciences, University of California, Santa Cruz

Dr. Moore's research concentrates on the structural and hydrogeologic evolution of convergent plate boundaries, and more generally, on fluid interactions in the diagenesis-metamorphism and structural evolution of sedimentary rocks. He analyzes the deformation of sedimentary basins and accretionary prisms from regional to handspecimen scales. He applies techniques used to study sedimentary diagenesis to structurally active environments, to define the pressure-temperature-time-porosity-permeability evolution of actively deforming sediments. He focuses on active modern marine environments sampled by drilling, imaged by seismic reflection, and analyzed with borehole logs. He also studies subduction complexes uplifted from seismogenic dephts and exposed on land.seismogenic depths. The group focuses on active modern marine environments (sampled by drilling and imaged by seismic reflection) and regions exposed on land with a straightforward tectonic setting. They combine observational and laboratory studies.

Screencast

The Seismogenic Zone Experiment (MP4 Video 108.3MB Mar12 13) Download Presentation

References from Presentation

  • Baba, T., and P. R. Cummins (2005), Contiguous rupture areas of the two Nankai Trough earthquakes revealed by high-resolution tsunami waveform inversion, Geophsical Research Letters, 32, L08305, doi:10.1029/2004GL022320.
  • Bangs, N., G. Moore, S. Gulick, E. Pangborn, H. Tobin, S. Kuromoto, and A. Taira (2009), Broad, weak regions of the Nankai Megathrust and implications for shallow coseismic slip, Earth and Planetary Science Letters, 284, 44-49.
  • Bangs, N. L., T. H. Shipley, J. C. Moore, and G. Moore (1999), Fluid accumulations and channeling along the Northern Barbados Ridge decollement thrust, Journal of Geophysical Research, 104, 20,399-320,414.
  • Bilek, S. L., and T. Lay (2002), Tsunami earthquakes possibly widespread manifestations of frictional conditional stability, Geophysical Research Letters, 29(14), 1673, doi:1610.1029/2002GL:015215.
  • Expedition 333 Scientists ( 2012), Expedition 333 summary, in Henry, P., Kanamatsu, T., Moe, K., and the Expedition 333 Scientists, Proc. IODP, 333: Tokyo (Integrated Ocean Drilling Program Management International, Inc.), edited.
  • Horn, D. R., H. B.M., and M. N. Delach (1970), Sedimentary Provinces of the North Pacific, Geological Society of America Memoir, 126, 1-21.
  • Ito, Y., and K. Obara (2006), Very low frequency earthquakes within accretionary prisms are very low stress-drop earthquakes, Geophysical Research Letters, 33, L09302, doi:10.1029/2006GL025883,2006.
  • Kikuchi, M., M. Nakamura, and K. Yoshikawa (2003), Source rupture processes of the 1944 Tonankai earthquake and the 1945 Mikawa earthquake derived from low-gain seismograms, Earth Planets Space, 55, 159-172.
  • Kopf, A., D. M. Saffer, E. E. Davis, and e. al. (2011), The SmartPlug and GeniusPlug: simple retrievable observatory systems for NanTroSEIZE borehole monitoring1, in: Kopf, A., Araki, E., Toczko, S., and the Expedition 332 Scientists, Proceedings of the Integrated Ocean Drilling Program, Volume 332, 20 pages.
  • Lay, T., and H. Kanamori (2011), Insights from the great 2011 Japan earthquake, Physics Today, December 2011, 33-39, http://dx.doi.org/10.1063/PT.1063.1361.
  • Marone, C., and E. Richardson (2010), Learning to read fault-slip behavior from fault-zone structure, Geology, 38, 767–768; 10.1130/focus082010.1, 2010., Geology, 38, 767–768.
  • Martin, K., S. Gulick, N. Bangs, G. Moore, J. Ashi, J.-O. Park, S. Kuramoto, and A. Taira (2010), Possible strain partitioning structure between the Kumano fore-arc basin and the slope of the Nankai Trough accretionary prism, Geochemistry, Geophysics, and Geosystems, doi: 10.1029/2009GC002668.
  • Moore, G. F., et al. (2009), Structural and seismic stratigraphic framework of the NanTroSEIZE Stage 1 transect1, In Kinoshita, M.,Tobin, H., Ashi, J., Kimura, G., Lallement, S., Screaton, E.J., Curewitz, D., Masago, H., Moe, K.T., and the Expedition 314/315/316 Scientists, Proc. IODP, 314/315/316: Washington, DC (Integrated Ocean Drilling Program Management International, Inc.).
  • Moore, J. C. (2001), Accretionary prisms at convergent plate boundaries, in Encyclopedia of Ocean Sciences, edited by S. T. J. Steele, and K. Turekian, pp. 28-34, Academic Press, London.
  • Moore, J. C., C. Rowe, and F. Meneghini (2007), How can Accretionary Prisms Elucidate Seismogenesis in Subduction Zones?, in The Seismogenic Zone of Subduction Thrust Faults, edited by T. Dixon and J. C. Moore, pp. 288-315, Columbia University Press, New York.
  • Moore, J. C., M. Barrett, and M. Kyaw Thu (2012), High Fluid Pressures and High Fluid Flow Rates in the Megasplay Fault Zone, NanTroSEIZE Kumano Transect, SW Japan, Geochemistry, Geophysics, and Geosystems, 13(1), 15.
  • Moore, J. C., M. Barrett, and M. Kyaw Thu (2013), High Fluid Pressures and High Fluid Flow Rates in the Megasplay Fault Zone, NanTroSEIZE Kumano Transect, SW Japan, Tectonophysics, 13 http://dx.doi.org/10.1016/j.tecto.2013.01.026.
  • Obana, K., and S. Kodaira (2009), Low-frequency tremors associated with reverse faults in a shallow accretionary prism, Earth and Planetary Science Letters, 287, 168-174.
  • Ranero, C., and R. von Huene (2000), Subduction erosion along the Middle America convergent margin, Nature, 404, 748-752.
  • Sakaguchi, A., et al. (2011), Seismic slip propagation to the up-dip end of plate boundary subduction interface faults: Vitrinite reflectance geothermometry on IODP NanTroSEIZE cores, Geology, 39, 395-398.
  • Tobin, H., M. Kinoshita, J. Ashi, S. Lallemant, G. Kimura, Screaton E., K. T. Moe, H. Masago, D. Curewitz, and IODP Expeditions 314/315/316 Scientific Party (2009a), NanTroSEIZE Stage 1 Expeditions 314, 315, and 316: First Drilling Program of the Nankai Trough Seismogenic Zone Experiment, Scientific Drilling, 8, 4-17 doi:10.2204/iodp.sd.2208.2201.2009.
  • Tobin, H., M. Kinoshita, J. Ashi, S. Lallemant, G. Kimura, E. Screaton, K.-T. Moe, H. Masago, D. Curewitz, and Expedition 314/315/316 Scientists (2009b), NanTroSEIZE Stage 1 expeditiions: introduction and synthesis of key results., In Kinoshita, M., Tobin, H., Ashi, J., Kimura, G., Lallemant, S., Screaton, E.J., Curewitz, D., Masago, H., Moe, K.T., and the Expedition 314/315/316 Scientists, Proc. IODP, 314/315/316: Washington, DC (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.314315316.101.2009, http://publications.iodp.org/proceedings/314_315_316/314315316toc.htm
  • Underwood, M. B., S. Saito, Y. Kubo, and the Expedition 322 Scientists (2009), NanTroSEIZE Stage 2: subduction inputs, IODP Prel. Rept., 322. doi:10.2204/iodp.pr.322.2009, http://publications.iodp.org/preliminary_report/322/index.html.
  • Yamaguchi, A., et al. (2011), Progressive illitization in fault gouge caused by seismic slip propagation along a megasplay fault in the Nankai Trough, Geology, 39, l995-998.