The Susceptibility data file contains the susceptibility
measurements taken onboard JOIDES Resolution. A Bartington
M.S.1 Magnetic Susceptibility meter on the ship can measure
discrete samples or whole core sections passed through the
instrument's sensor loop.
The data are collected directly from the susceptibility meter
onto the shipboard VAX computer and brought back to shore on
magnetic tape. These data files contain measurements made on
whole core sections.
Shipboard Scientific Party, 1987. Explanatory Notes. in
Srivastava, S. P., Arthur, M. A., Clement, B. M., et al.,
Proc., Init. Repts. (Pt A), ODP, 105.
DATA ITEM FORMATS
EXPLANATION OF THE SUSCEPTIBILITY DATA ITEMS
LEG - Number identifying the cruise.
SITE - Number identifying the site. A site is the position of
a beacon around which holes are drilled.
HOLE - Letter identifying the hole.
CORE - Number identifying the core. Cores are numbered
serially from the top of the hole downward.
CORETYPE - A letter code identifying the drill bit/coring
method used to retrieve the core. The coretype codes are:
B - Drill Bit
C - Center Bit
D - Positive Displacement
H - Hydraulic Piston Core
M - Miscellaneous
N - Downhole Mud Motor (Navidrill)
P - Pressure Core Barrel
R - Rotary
S - Side Wall Core
W - Wash Core
X - Extended Core Barrel
SECTION - A core is cut into 1.5 meter long sections that are
numbered serially from the top of the core. A core with full
recovery will have 7 sections and a core catcher and be
approximately 9.8 meters long.
TOP_INTERVAL - The location of the top of a sample within a
section in centimeters.
BOTTOM_INTERVAL - The location of the bottom of a sample
within a section in centimeters.
SUB_BOTTOM_DEPTH - Distance in meters from the seafloor to
the top of the sample interval.
SUSCEPTIBILITY - The value is in x10-6 cgs units and is
RUN_NUMBER - Each run of the MST is given a number which
increments by one with every test.