Proc. IODP, 311, Data report: quantitative analysis of grain size distribution for coarse sediments in an accretionary prism: an example from the Cascadia accretionary prism

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Chapter contents Abstract Introduction Materials and methods Results Analysis of grain size distributions Occurrences of grains in thin sections Acknowledgments References Figures F1. Thin section schematic. F2. Exponential and power functions. F3. Grain size vs. depth and porosity. F4. Kurtosis vs. depth and porosity. F5. Skewness vs. depth and porosity. F6. Exponential-R vs. depth and porosity. F7. Power-R vs. depth and porosity. F8. Exponential-R vs. power-R. F9. Grains with higher exponential-R. F10. Grains with lower exponential-R. Table T1. Grain size analysis. PDF file		Previous \| Next doi:10.2204/iodp.proc.311.205.2009 References Bjørkum, P.A., Oelkers, E.H., Nadeau, P.H., Walderhaug, O., and Murphy, W.M., 1998. Porosity prediction in quartzose sandstones as a function of time, temperature, depth, stylolite frequency, and hydrocarbon saturation. AAPG Bull., 82:637–648. Bray, C.J., and Karig, D.E., 1985. Porosity of sediments in accretionary prisms and some implications for dewatering processes. J. Geophys. Res., 90(B1):768–778. doi:10.1029/JB090iB01p00768 Byrne, T., 1984. Early deformation in melange terranes of the Ghost Rocks Formation, Kodiak Islands, Alaska. In Raymond, L.A. (Ed.), Melanges: Their Nature Origin, and Significance. Spec. Pap.—Geol. Soc. Am., 198:21–52. Cochrane, G.R., Moore, J.C., MacKay, M.E., and Moore, G.F., 1994. Velocity and inferred porosity model of the Oregon accretionary prism from multichannel seismic reflection data: implications on sediment dewatering and overpressure. J. Geophys. Res., 99(B4):7033–7043. doi:10.1029/93JB03206 Hashimoto, Y., Nakaya, T., Ito, M., and Kimura, G., 2006. Tectonolithification of sandstone prior to the onset of seismogenic subduction zone: evidence from tectonic mélange of the Shimanto Belt, Japan. Geochem., Geophys., Geosys., 7(6):Q06013. doi:10.1029/2005GC001062 Houseknecht, D.W., 1987. Assessing the relative importance of compactional processes and cementation to the reduction of porosity in sandstones. AAPG Bull., 71:633–642. Moore, J.C., and Karig, D.E., 1976. Sedimentology, structural geology, and tectonics of the Shikoku subduction zone, southwestern Japan. Geol. Soc. Am. Bull., 87(9):1259–1268. doi:10.1130/00167606(1976)87<1259:SSGATO>2.0.CO;2 Saffer, D.M., Silver, E.A., Fisher, A.T., Tobin, H., and Moran, K., 2000. Inferred pore pressures at the Costa Rica subduction zone: implications for dewatering processes. Earth Planet. Sci. Lett., 177(3–4):193–207. doi:10.1016/S0012-821X(00)00048-0 Saito, S., and Goldberg, D., 2001. Compaction and dewatering processes of the oceanic sediments in the Costa Rica and Barbados subduction zones: estimates from in situ physical property measurements. Earth Planet. Sci. Lett., 191(3–4):283–293. doi:10.1016/S0012-821X(01)00403-4 Wong, T.-F., David, C., and Zhu, W., 1997. The transition from brittle faulting to cataclastic flow in porous sandstones: mechanical deformation. J. Geophys. Res., 102(B2):3009–3025. doi:10.1029/96JB03281 Zhang, J., Wong, T., and Davis, D.M., 1990. Micromechanics of pressure-induced grain crushing in porous rocks. J. Geophys. Res., 95(B1):341–352. doi:10.1029/JB095iB01p00341 Top of page \| Previous \| Next

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