Magnetic remanence (SRM-longcore)

This report provides measurements of magnetic remanence including natural remanent magnetization (NRM), NRM after thermal or alternating field (AF) demagnetization, anhysteretic remanent magnetization (ARM), etc. Magnetic remanence is measured using a 2G Enterprises superconducting rock magnetometer (SRM). This reports returns data from measurements on discrete pieces from whole-round cores or section halves of cores.

SRM discrete data are often available for multiple demagnetization steps. In such cases, all demagnetization steps are displayed for each sample. If the sample was measured in multiple positions, data from the different orientations are included in each demagnetization step. This sequence is repeated for all samples within a section, all sections within a core, and all cores within a hole.

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 a section half.
    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.
    Treatment Type: refers to type of remanent magnetization measured. Default is natural remanent magnetization (NRM) but other types include anhysteretic (ARM) and isothermal (IRM).
    Treatment Value: value of offline treatment that was applied to the sample being measured (e.g., thermal demagnetization deg C).
    Inclination background & drift corrected (deg): inclination computed with background and drift correction.
    Declination background & drift corrected (deg): declination computed with background and drift correction.
    Intensity background & drift corrected (A/m): intensity computed with background and drift correction.
    Inclination raw (deg): inclination computed from magnetic moment data.
    Declination raw (deg): declination computed from magnetic moment data.
    Intensity raw (A/m): intensity computed from magnetic moment data.
    Magnetic moment x (Am^2): magnetic moment raw data from SQUID (x-axis), with sign corrected to match IODP orientation conventions.
    Magnetic moment y (Am^2): magnetic moment raw data from SQUID (y-axis), with sign corrected to match IODP orientation conventions.
    Magnetic moment z (Am^2): magnetic moment raw data from SQUID (z-axis), with sign corrected to match IODP orientation conventions.
    Sample orientation: orientation of sample measured (e.g., top away; see user guide for possible orientations).
    Raw data: ASCII file with raw SRM data.
    SRM background filename: SRM background with tray data file.
    Configuration filename: SRM instrument configuration file.
    Instrument: abbreviation for the magnetometer used to make this measurement.
    Timestamp (UTC): time file was uploaded into the LIMS, which is typically a few minutes to hours after data were acquired.
    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.