Proc. IODP, 314/315/316, Expedition 314 Site C0002

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Chapter contents Background and objectives Operations Transit to Site C0002 Hole C0002A Transit to Site C0003 Data and log quality Hole C0002A Log characterization and lithologic interpretation Log characterization and lithologic interpretation Log characterization and identification of logging units Log-based lithologic interpretation Physical properties Density Neutron porosity Resistivity and estimated porosity P-wave velocity Comparison of P-wave velocity with other properties Structural geology and geomechanics Bedding Structure of logging Unit III (forearc basin–prism transition) Natural fractures Borehole breakouts Stress magnitude analysis from breakout widths Discussion and conclusions Log-seismic correlation Kumano Basin seismic stratigraphy Overall log unit correlation Structural orientations from seismic observations Check shot survey and vertical seismic profile data Synthetic seismogram Discussion and synthesis Kumano forearc basin features Old accretionary prism features Stress field and tectonics in the Kumano Basin References Figures F1. Summary log diagram. F2. Seismic profile. F3. Drilling parameters. F4. Mudline identification. F5. Control logs. F6. Geophysical logs. F7. Time vs. depth. F8. Wide quality control log. F9. Logging unit and zone variation. F10. Caliper and resistivity logs. F11. Bedding dips. F12. Facies variability. F13. Resistivity logs. F14. Logging units. F15. Log responses. F16. “Mottled” intervals. F17. IDRO profile. F18. TNPH and IDRO profile. F19. Neutron porosity vs. IDRO. F20. TNPH profile F21. Resistivity plots. F22. Formation factor vs. IDRO. F23. Porosity comparisons. F24. Resistivity porosity vs. IDRO. F25. Velocity log. F26. Velocity and resistivity comparison. F27. Velocity and porosity plots. F28. Shallow resistivity image. F29. Poles and bedding planes. F30. Resistivity image. F31. Fracture frequency. F32. Poles and fracture planes. F33. Normal fault displacement. F34. Conjugate fractures. F35. Borehole breakouts. F36. Borehole breakout variation. F37. Stress polygons. F38. Seismic volume. F39. Interval velocity. F40. Density log. F41. Ring resistivity log. F42. Gamma ray log. F43. Caliper log. F44. Neutron porosity log. F45. PEF log. F46. Log curves. F47. Log curves. F48. Log curves. F49. Check shot seismogram. F50. Check shot and sonic log. F51. VSP and PSTM profiles. F52. Synthetic seismogram. Tables T1. Operations summary. T2. Bottom-hole assembly. T3. Sonic log data. T4. Resistivity image data. T5. Logging units and zones. T6. Check shot-corrected depths. T7. Strikes and dips. T8. Check shot traveltimes. PDF file			Previous \| Next doi:10.2204/iodp.proc.314315316.114.2009 References Chang, C., Zoback, M.D., and Khaksar, A., 2006. Empirical relations between rock strength and physical properties in sedimentary rocks. J. Pet. Sci. Eng., 51(3–4):223–237. doi:10.1016/j.petrol.2006.01.003 Fuller, C.W., Willett, S.D., and Brandon, M.T., 2006. Formation of forearc basins and their influence on subduction zone earthquakes. Geology, 34(2):65–68. doi:10.1130/G21828.1 Gulick, S.P., Bangs, N.L., Moore, G.F., Martin, K., Nakamura, Y., Kuramoto, S., Tobin, H.J., and Taira, A., 2007. Uplift and deformation of the Kumano forearc basin: preliminary results from Nankai Trough 3D seismic imaging offshore Kii Peninsula, Japan. Eos, Trans. Am. Geophys. Union, 88(52):T53A-1118. (Abstract) Kvenvolden, K.A., 1988. Methane hydrate—a major reservoir of carbon in the shallow geosphere? Chem. Geol., 71(1–3):41–51. doi:10.1016/0009-2541(88)90104-0 Lizarralde, D., and Swift, S., 1999. Smooth inversion of VSP traveltime data. Geophysics, 64(3):659–661. doi:10.1190/1.1444574 Martin, K.M., Gulick, S.P., Bangs, N.L., Moore, G.F., Kuramoto, S., Tobin, H., and Taira, A., 2007. Preliminary analysis of an anomalous bathymetric “notch” between the Kumano forearc basin and the slope of the Nankai Trough accretionary prism. Eos, Trans. Am. Geophys. Union, 88(52):T53A-1115. McNeill, L.C., Piper, K.A., Goldfinger, C., Kulm, L.D., and Yeats, R.S., 1997. Listric normal faulting on the Cascadia continental margin. J. Geophys. Res., 102(B6):12123–12138. doi:10.1029/97JB00728 Moore, G.F., Bangs, N.L., Taira, A., Kuramoto, S., Pangborn, E., and Tobin, H.J., 2007. Three-dimensional splay fault geometry and implications for tsunami generation. Science, 318(5853):1128–1131. doi:10.1126/science.1147195 Moore, G.F., Taira, A., Klaus, A., et al., 2001. Proc. ODP, Init. Repts., 190: College Station, TX (Ocean Drilling Program). doi:10.2973/odp.proc.ir.190.2001 Rider, M.H., 1996. The Geological Interpretation of Well Logs (2nd ed.): Caithness (Whittles Publishing). Tobin, H.J., and Kinoshita, M., 2006. NanTroSEIZE: the IODP Nankai Trough Seismogenic Zone Experiment. Sci. Drill., 2:23–27. doi:10.2204/iodp.sd.2.06.2006 Ujiie, K., Hisamitsu, T., Maltman, A.J., Morgan, J.K., Sánchez-Gómez, M., and Tobin, H.J., 2003. Deformation structures and magnetic fabrics at Site 1178: implication for deformation history recorded in accreted sediments at an evolved portion of the Nankai accretionary prism. In Mikada, H., Moore, G.F., Taira, A., Becker, K., Moore, J.C., and Klaus, A. (Eds.), Proc. ODP, Sci. Results, 190/196: College Station, TX (Ocean Drilling Program), 1–15. doi:10.2973/odp.proc.sr.190196.202.2003 Wang, K., and Hu, Y., 2006. Accretionary prisms in subduction earthquake cycles: the theory of dynamic Coulomb wedge. J. Geophys. Res., 111(B6):B06410. doi:10.1029/2005JB004094 Top of page \| Previous \| Next

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