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  • 125-779A; 125-780C; 125-784A; DRILL; Drilling/drill rig; Joides Resolution; Leg125; North Pacific Ocean; Ocean Drilling Program; ODP  (1)
  • velocity surfaces  (1)
  • 111-504B; DRILL; Drilling/drill rig; Joides Resolution; Leg111; North Pacific Ocean; Ocean Drilling Program; ODP
  • 1990-1994  (2)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Elastic constants and velocity surfaces of indurated anisotropic shales (1994)
    Springer
    Surveys in geophysics 15 (1994), S. 481-494 
    Details
    ISSN: 1573-0956
    Keywords: Vp ; vs ; laboratory ; anisotropy ; shales ; elastic constants ; velocity surfaces
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The velocities of two Devonian-Mississippian shales have been measured to confining pressures of 200 MPa in a laboratory study of anisotropy and wave propagation. Both samples were found to be transversely isotropic at elevated pressures with the main symmetry axis perpendicular to bedding. The elastic constants of the shales were used to calculate phase and group velocity surfaces as a function of angle to the bedding normal. Multiple velocity measurements in non-symmetry directions, not undertaken in previously published studies of shales, have been used to confirm features observed on calculated velocity surfaces. It is demonstrated that velocities measured in non-symmetry directions are phase velocities. Group velocities were found to be significantly lower than the corresponding phase velocities of the shales due to their high anisotropies. Shear wave splitting was found to be negligible for propagation directions within approximately 30° of the bedding normals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00690171
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Unknown
    Seismic properties of serpentinized peridotites from the Mariana Forearc (1992)
    PANGAEA
    In:  Supplement to: Ballotti, Dean M; Christensen, Nikolas I; Becker, Keir (1992): Seismic properties of serpentinized peridotite from the Mariana Forearc. In: Fryer, P; Pearce, JA; Stokking, LB; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 125, 581-584, https://doi.org/10.2973/odp.proc.sr.125.161.1992
    Details
    Publication Date: 2024-01-09
    Description: Compressional and shear velocities, density, and porosity were measured for 22 serpentinized peridotites recovered during ODP Leg 125. The densities of the samples vary from 2.40 to 2.86 g/cm**3, whereas the compressional velocities at 200 MPa are between 4.60 and 6.47 km/s. A positive linear trend exists between both compressional and shear velocities and density. The high porosity in serpentinized peridotites decreases the density and seismic velocity.
    Keywords: 125-779A; 125-780C; 125-784A; DRILL; Drilling/drill rig; Joides Resolution; Leg125; North Pacific Ocean; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
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