P-wave velocity logger (PWAVE-L)

P-wave velocity data were measured on whole-round sections on the Whole-Round Multisensor Logger (WRMSL) using pairs of piezoelectric transducers mounted on a caliper system. Measurements may be affected by degassing of pore fluid and microfracturing during core recovery. Report includes P-wave velocity in x-y plane and distance and traveltime between transducers.

Data File format

    Exp: expedition number
    Site: site number
    Hole: hole number
    Core: core number
    Type: type indicates the coring tool used to recover the core (typical types are F, H, R, X).
    Sect: section number
    A/W: archive (A) or working (W) section half.
    Offset (cm): position of the observation made, measured relative to the top of the section.
    Depth CSF-A (m): location of the observation expressed relative to the top of a hole.
    Depth [other] (m): location of the observation expressed relative to the top of a hole. The location is presented in a scale selected by the science party or the report user.
    P-wave velocity xy (m/s): velocity of pressure wave through sample in the x-y plane.
    Caliper separation (mm): displacement between the faces of the transducers in contact with the sample.
    Sonic traveltime (µs): traveltime of the sonic wave from transducer to transducer through the sample.
    Transducer signal filename: file containing the raw P-wave signal.
    Configuration filename: P-wave logger instrument configuration file.
    Instrument: abbreviation or mnemonic for the P-wave sensing device used to make this observation (PWL).
    Instrument group: abbreviation or mnemonic for the data collection device (logger) used to acquire this observation (WRMSL).
    Timestamp (UTC): data and time at which the observation or set of observations was made.
    Text ID: automatically generated unique database identifier for a sample, visible on printed labels.
    Test No: unique number associated with the instrument measurement steps that produced these data. 
    Sample comments: observations recorded about the sample itself.
    Test comments: observations about a measurement or the measurement process; some measurement observations may be under Result comments.
    Result comments: observations about a measurement or the measurement process; some measurement observations may be under Test comments.