Data Description

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Citation:
Dunbar, GB et al. (2009): Physical properties of sediment core AND-2A. doi:10.1594/PANGAEA.744014,
Supplement to: Dunbar, Gavin B; Atkins, Cliff; Magens, Diana; Niessen, Frank; SMS Science Team (2009): Physical Properties of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica. Terra Antartica, 15(1), 49-56, hdl:10013/epic.35202.d001
Abstract:
Whole-core measurements of Wet Bulk Density (WBD), compressional (P)-wave velocity (Vp), and Magnetic Susceptibility were measured at a sampling interval of 1 or 2 centimetres (cm) throughout the AND-2A drill core for initial core characterisation and on-site correlation with seismic modeling to predict target-reflector depth. Measurements were made using a GEOTEK (Multi-Sensor-Core-Logger MSCL). Density and velocity standards were measured together with core runs of 3-6 metres (m) (and occasionally up to 18 m) throughout the entire depth range to monitor data quality. Drift of the magnetic susceptibility sensor was also monitored and corrected where necessary. These physical properties show a large range of values, reflecting the different nature of the various lithologies including extremely high velocity and density values in individual clasts, and the effects of cementation on porosity. A downcore increase in WBD and Vp occurs in the upper 200 m, however, no systematic trend exists at greater depths although large fluctuations on a m-decimetre- (dm) scale occur. Magnetic susceptibility is generally low (<100 x 10-5 SI), however, four intervals of high (>600 x 10-5 SI) susceptibility occur at 560, 800, 980 and 1 080 mbsf, indicating a relatively greater contribution of volcanic-derived material to the core site in the lower half of the AND-2A core.
Project(s):
Coverage:
Latitude: -77.758141 * Longitude: 165.276765
Minimum DEPTH, sediment/rock: 9.0 m * Maximum DEPTH, sediment/rock: 788.2 m
Event(s):
AND-2A * * Latitude: -77.758141 * Longitude: 165.276765 * Date/Time Start: 2007-10-10T12:00:00 * Date/Time End: 2007-11-30T12:00:00 * Elevation: -380.0 m * Recovery: 1138.54 m * Penetration: 0.00 m * Location: McMurdo Sound * * Campaign: SMS (Southern McMurdo Sound) * * Basis: McMurdo Station * * Device: Drilling/drill rig * * Comment: Coring site is located ~25 km from the United States' McMurdo Station and from New Zealand's Scott Base on a 8.5 m thick floating sea-ice platform.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rock *DepthmGeocode
2Velocity, compressional wave *Vpm/sNiessen, Frank *Multi-Sensor Core Logger, GEOTEK *
3Density, wet bulk *WBDg/cm3Niessen, Frank *Multi-Sensor Core Logger, GEOTEK *
4Porosity, fractional *Poros fracNiessen, Frank *
5Susceptibility, volume *kappa10-6 SINiessen, Frank *Multi-Sensor Core Logger, GEOTEK *
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Size:
166402 data points

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