REFERENCES

Bangs, N.L.B., Musgrave, R.J., and Tréhu, A.M., 2005. Upward shifts in the southern Hydrate Ridge gas hydrate stability zone following postglacial warming, offshore Oregon. J. Geophys. Res., 110. doi:10.1029/2004JB003293

Collett, T.S., 1998. Well log evaluation of gas hydrate saturations. In Trans. SPWLA 39th Annu. Logging Symp.: Houston (SPWLA), 39:MM.

Dvorkin, J., and Nur, A., 1996. Elasticity of high-porosity sandstones: theory for two North Sea data sets. Geophysics, 61:1363–1370. doi:10.1190/1.1444059

Dvorkin, J., Nur, A., and Yin, H., 1994. Effective properties of cemented granular materials. Mech. Mater., 18(4):351-366. doi:10.1016/0167-6636(94)90044-2

Dvorkin, J., Prasad, M., Sakai, A., and Lavoie, D., 1999. Elasticity of marine sediments: rock physics modeling. Geophys. Res. Lett., 26:1781–1784. doi:10.1029/1999GL900332

Gassmann, F., 1951. Elastic waves through a packing of spheres. Geophysics, 15:673–685. doi:10.1190/1.1437718

Guerin, G., and Goldberg, D., 2002. Sonic waveform attenuation in gas hydrate–bearing sediments from the Mallik 2L-38 research well, MacKenzie Delta, Canada. J. Geophys. Res., 107:2088. doi:10.1029/2001JB000556

Guerin, G., and Goldberg, D., 2005. Modeling of acoustic wave dissipation in gas hydrate–bearing sediments. Geochem., Geophys., Geosyst., 6. doi:10.1029/2005GC000918

Guerin, G., Goldberg, D., and Collett, T.S., 2005. Sonic attenuation in the Mallik 5L38 gas hydrate research well. Bull.—Geol. Surv. Can., 585.

Guerin, G., Goldberg, D., and Meltser, A., 1999. Characterization of in situ elastic properties of gas-hydrate bearing sediments on the Blake Ridge. J. Geophys. Res., 104:17781–17796. doi:10.1029/1999JB900127

Harrison, A.R., Randall, C.J., Aron, J.B., Morris, C.F., Wignall, A.H., Dworak, R.A., Rutledge, L.L., and Perkins, J.L., 1990. Acquisition and analysis of sonic waveforms from a borehole monopole and dipole source for the determination of compressional and shear speeds and their relation to rock mechanical properties and surface seismic data. Abstract 65, Ann. Tech. Conf. Exhib. Soc. Pet. Eng., 23–26/9, 267–282.

Helgerud, M.B., Dvorkin, J., Nur, A., Sakai, A., and Collett, T., 1999. Elastic-wave velocity in marine sediments with gas hydrates: effective medium modeling. Geophys. Res. Lett., 26(13):2021–2024. doi:10.1029/1999GL900421

Kimball, C.V., and Marzetta, T.L., 1984. Semblance processing of borehole acoustic array data. Geophysics, 49:274–281. doi:10.1190/1.1441659

Lee, M.W., and Collett, T.S., 2005. Assessment of gas hydrate saturations estimated from sonic logs in the Mallik 5L-38 well, Canada. In Dallimore, S.R., and Collett, T.S. (Eds.), Scientific Results from the Mallik 2002 Gas Hydrate Production Well Program, Mackenzie Delta, Northwest Territories, Canada. Bull.Geol. Surv. Can., 585.

Lee, M.W., Hutchinson, D.R., Collett, T.S., and Dillon, W.P., 1996. Seismic velocities for hydrate-bearing sediments using weighted equation. J. Geophys. Res., 101:20347–20358. doi:10.1029/96JB01886

Milkov, A.V., Claypool, G.E., Lee, Y.-J., Xu, W., Dickens, G.R., Borowski, W.S., and the ODP Leg 204 Scientific Party, 2003. In situ methane concentrations at Hydrate Ridge offshore Oregon: new constraints on the global gas hydrate inventory from an active margin. Geology, 31:833–836.

Milkov, A.V., Dickens, G.R., Claypool, G.E., Lee, Y.-J., Borowski, W.S., Torres, M.E., Xu, W., Tomaru, H., Tréhu, A.M., and Schultheiss, P., 2004. Co-existence of gas hydrate, free gas, and brine within the regional gas hydrate stability zone at Hydrate Ridge (Oregon margin): evidence from prolonged degassing of a pressurized core. Earth Planet. Sci. Lett., 222:829–843. doi:10.1016/j.epsl.2004.03.028

Murphy, W.F., 1982. Effects of partial water saturation on attenuation in Massilon sandstone and Vycor porous glass. J. Acoust. Soc. Am., 71:1458–1468.

Murphy, W.F., 1984. Acoustic measures of partial gas saturation in tight sandstones. J. Geophys. Res., 89:11549–11559.

Peterson, R.A., Fillipone, W.R., and Coker, E.B., 1955. The synthesis of seismograms from well log data. Geophysics, 20:516–538. doi:10.1190/1.1438155

Tréhu, A.M., and Bangs, N., 2001. 3-D seismic imaging of an active margin hydrate system, Oregon continental margin, report of cruise TTN112. Oregon State Univ. Data Rpt., 182.

Tréhu, A.M, Bohrmann, G., Rack, F.R., Torres, M.E., et al., 2003. Proc. ODP, Init. Repts., 204 [Online]. Available from World Wide Web: <http://www-odp.tamu.edu/publications/204_IR/204ir.htm>. [Cited 2006-08-30]

Tréhu, A.M., Flemings, P.B., Bangs, N.L., Chevallier, J., Grŕcia, E., Johnson, J.E., Liu, C.S., Riedel, M., and Torres, M.E., 2004a. Feeding methane vents and gas hydrate deposits at south Hydrate Ridge. Geophys. Res. Lett., 31:L23310. doi:10.1029/2004GL021286

Tréhu, A.M., Long, P.E., Torres, M.E., Bohrmann, G., Rack, F.R., Collett, T.S., Goldberg, D.S., Milkov, A.V., Riedel, M., Schultheiss, P., Bangs, N.L., Barr, S.R., Borowski, W.S., Claypool, G.E., Delwiche, M.E., Dickens, G.R., Gracia, E., Guerin, G., Holland, M., Johnson, J.E., Lee, Y.-J., Liu, C.-S., Su, X., Teichert, B., Tomaru, H., Vanneste, M., Watanabe, M., and Weinberger, J.L., 2004b. Three-dimensional distribution of gas hydrate beneath southern Hydrate Ridge: constraints from ODP Leg 204. Earth Planet. Sci. Lett., 222:845–862. doi:10.1016/j.epsl.2004.03.035

Wuenschel, P.C., 1960. Seismogram synthesis including multiples and transmission coefficients. Geophysics, 25:106–129. doi:10.1190/1.1438677