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- Contents
- Title page
- Publisher's notes
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 Expedition 333 participants
- Abstract
- Introduction
- Overview of the NanTroSEIZE complex drilling project
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Background
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Sites C0011 and C0012
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NanTroSLIDE Ancillary Project Letter
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Principal results
- Preliminary scientific assessment
- References
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Table
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Figures
- F1. Bathymetric map.
- F2. Spliced composite profile.
- F3. Detailed bathymetry and structure, Site C0018.
- F4. Schematic sedimentary log, Hole C00018A.
- F5. Top of MTD 2.
- F6. Shear zone at base of MTD 2.
- F7. Fluidized ash layer, corresponding to MTD 4.
- F8. Chaotic style of internal deformation in MTD 6.
- F9. Cyclic succession of turbidites.
- F10. XRD data, Hole C0018A.
- F11. SiO2, Al2O3, CaO, Fe2O3, MgO, and TiO2, Site C0011.
- F12. Bedding dip angles and deformation structures, Site C0018.
- F13. Lower-hemisphere equal-area projections, Site C0018.
- F14. Appearance of slump fold.
- F15. Appearance of shear zone.
- F16. Physical properties, porosity, shear strength, and resistivity, Site C0018.
- F17. Interstitial water and sulfate, Hole C0018A.
- F18. Pore water constituents, Hole C0018A.
- F19. More pore water constituents, Hole C0018A.
- F20. Methane, ethane, and C1/C2 ratios, Site C0018.
- F21. CaCO3, TOC, TN, TOC/TNat, and TS, Hole C0018A.
- F22. Lithology on seismic profile, Site C0018.
- F23. APCT-3 temperature measurements.
- F24. Bathymetric map, Sites C0011, C0012, and C0018.
- F25. Lithology on seismic background, Sites C0011 and C0012.
- F26. Sedimentary log, Holes C0011C and C0011D.
- F27. XRD data, Holes C0011C and C0011D.
- F28. Ash alteration state across unit boundaries.
- F29. Units I and II lithologic and textural differences, Hole C0011D.
- F30. SiO2, Al2O3, CaO, Fe2O3, Na2O, K2O, and P2O5, Site C0011.
- F31. Bedding dip angles and deformation structures, Holes C0011C and C0011D.
- F32. Lower-hemisphere equal-area projections, Holes C0011C and C0011D.
- F33. Magnetic susceptibility and remanent magnetization, Site C0011.
- F34. Resistivity and porosity, Site C0011.
- F35. Penetrometer and vane shear, Site C0011.
- F36. P-wave velocity, Holes C0011D and C0011B.
- F37. Interstitial water and sulfate, Site C0011.
- F38. Interstitial water constituents, Site C0011.
- F39. More interstitial water constituents, Site C0011.
- F40. Methane concentration, Holes C0011C and C0011D.
- F41. CaCO3, TOC, TN, TOC/TNat, and TS, Holes C0011C and C0011D.
- F42. Sedimentary log, Holes C0012C and C0012D.
- F43. XRD data, Holes C0012C and C0012D.
- F44. SiO2, Al2O3, CaO, Fe2O3, MgO, MnO, and P2O5, Site C0012.
- F45. Bedding dip angles and deformation structures, Holes C0012C and C0012D.
- F46. Remanent magnetization and magnetic susceptibility, Sites C0011 and C0012.
- F47. Bulk density, porosity, and grain density, Site C0012.
- F48. Mudstone porosity, Sites C0011 and C0012.
- F49. P-wave velocity, Site C0012.
- F50. Interstitial water and sulfate, Site C0012.
- F51. Interstitial water constituents, Site C0012.
- F52. More interstitial water constituents, Site C0012.
- F53. Methane, ethane, and C1/C2, Holes C0012C, C0012D, and C0012E.
- F54. CaCO3, TOC, TN, TOC/TNat, and TS, Holes C0012C, C0012D, and C0012E.
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doi:10.2204/iodp.pr.333.2011
Abstract
The Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) program is a coordinated, multiexpedition drilling project designed to investigate fault mechanics and seismogenesis along subduction megathrusts through direct sampling, in situ measurements, and long-term monitoring in conjunction with allied laboratory and numerical modeling studies. Some of the fundamental scientific objectives of the NanTroSEIZE drilling project include characterizing the nature of fault slip and strain accumulation, fault and wall rock composition, fault architecture, and state variables throughout the active plate boundary system to a depth of 7000 m below seafloor. It is also important to show how such properties evolve from shallow, presubduction conditions in the Shikoku Basin to greater depths of the accretionary prism where fault slip is seismogenic. Within this context, the primary goals for Integrated Ocean Drilling Program (IODP) Expedition 333 were: (1) drilling and coring of previously unsampled intervals of sediment and basalt at IODP Sites C0011 and C0012 in the Shikoku Basin, together with downhole measurements of temperature, and (2) drilling and coring at a site near the updip terminus of the megasplay fault, as proposed in Ancillary Project Letter (738-APL: Nankai Trough Submarine Landslide History [NanTroSLIDE]).
The most important accomplishments were (1) determination of heat flow at Sites C0011 and C0012, (2) coring through a transition in physical properties within the upper part of the Shikoku hemipelagite, (3) repeated coring and sampling of fluid above the sediment/basement interface for shore-based geochemical studies, (4) coring into the basalt to 100 m below the sediment/basalt interface, and (5) drilling and sampling a nearly complete slope basin stratigraphic succession comprising six mass transport deposits that record ~1 m.y. submarine landsliding history near the shallow megasplay fault zone area.
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