VP-VS AND POISSON RATIOS IN MARINE-SEDIMENTS AND ROCKS

被引：190

作者：

HAMILTON, EL

机构：

[1] Naval Ocean Systems Center, San Diegó

来源：

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 1979年 / 66卷 / 04期

关键词：

D O I：

10.1121/1.383344

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The ratio of compressional wave velocity Vpto shear wave velocity Vsand Poissons ratio in marine sediments and rocks are important in modeling the sea floor for underwater acoustics, geophysics, and foundation engineering. Vpand Vsversus depth information was linked at common depths in terrigenous sediments (to 1000 m) and in sands (to 20 m) to yield data on Vpvs Vsand Vp/Vsand Poissons ratios versus depth. Soft, terrigenous sediments usually grade with depth into mudstones and shales; Vp/Vsratios vary from about 13 or more at the sea floor to about 2.6 at 1000 m. Poissons ratios vary from above 0.49 at the sea floor to about 0.41 at 1000 m. In sands, VpVsand Vp/VMhave very high gradients in the first few meters; below about 5 m, Vp/Vsratios decrease from about 9 to about 6 at 20 m; Poissons ratios vary from above 0.49 at the surface to above 0.48 at 20 m. The mean value of Vp/VSin 30 laboratory samples of chalk and limestone is 1.90 (standard error: 0.03); mean Poissons ratio is 0.31. Literature data on basalts from the sea floor are reviewed. Equations relating Vpto V3are given for terrigenous sediments, sands, and basalts. © 1979, American Association of Physics Teachers. All rights reserved.

引用

页码：1093 / 1101

页数：9

共 39 条

[1] Nur A., Dilatancy, Pore Fluids, and Premonitory Variations of ts/tp Travel Times, Bull. Seismol. Soc. Am, 62, pp. 1217-1222, (1972)
[2] Anderson D.L., Whitcomb J.H., Time-Dependent Seismology, 80, pp. 1497-1503, (1975)
[3] Tatham R.H., Stoffa P.L., V<sub>p</sub>/V<sub>s</sub>, 849, (1976)
[4] Gregory A.R., Fluid Saturation Effects on Dynamic Elastic Properties of Sedimentary Rocks, Geophysics, 41, pp. 895-921, (1976)
[5] Domenico S.N., Effect of Brine Gas Mixture on Velocity in an Unconsolidated Sand Reservoir, Geophysics 41, 882, 894, (1976)
[6] Domenico S.N., Elastic Properties of Unconsolidated Porous Sand Reservoirs, Geophysics, 42, pp. 1339-1368, (1977)
[7] Hamilton E.L., Elastic Properties of Marine Sediments, J. Geophys. Res, 76, pp. 579-604, (1971)
[8] Hamilton E.L., Shear-Wave Velocity versus Depth in Marine Sediments: a Review, Geophysics, 41, pp. 985-996, (1976)
[9] Hamilton E.L., Sound Velocity Gradients in Marine Sediments, J. Acoust. Soc. Am, 65, pp. 909-922, (1979)
[10] Hamilton E.L., Variations of Density and Porosity with Depth in Deep Sea Sediments, 300, (1976)

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