L090 L091 Wilkes ice thickness measurements, Antarctica, 1962, 1963

• Other Authors: Commonwealth of Australia (Geoscience Australia) (distributor), Commonwealth of Australia (Geoscience Australia) (owner), Commonwealth of Australia (Geoscience Australia) (pointOfContact), Geoscience Australia (publisher), Kirton, M. (author), MNHD (hasAssociationWith), Manager Client Services (custodian), U44229 (custodian)
• Format: Dataset
• Language: unknown
• Published: Geoscience Australia
• Subjects: geoscientificInformation; Seismic Data; seismic survey; seismic reflection; seismic velocity; geophysics; AQ; Seismology and Seismic Exploration; EARTH SCIENCES; Published_External; Antarctic; Antarc*; Antarctica
• Online Access: https://researchdata.edu.au/l090-l091-wilkes-1962-1963/1262209; https://pid.geoscience.gov.au/dataset/ga/76471

Maintenance and Update Frequency: asNeeded Statement: In 1963, the Australian National Antarctic Research Expeditions (ANARE) made two oversnow traverses to make glaciological, meteorological, and geophysical observations in unexplored parts of Antarctica east and south-east of Wilkes Station. On these traverses, the author, a geophysicist with the Bureau of Mineral Resources, was responsible for the geophysical programme. This comprised the measurement of surface altitudes by barometric methods, the measurement of ice thickness by seismic and gravity techniques, the determination of the components of the geomagnetic field, and the measurement of borehole temperatures. In addition, experiments were carried out to improve the quality of the seismic reflection records. During 1963, the Australian National Antarctic Research Expeditions carried out two over snow traverses in the vicinity of Wilkes Station, Antarctica. The Autumn Traverse reached a point about 100 miles east of Wilkes and the Spring Traverse a point about 300 miles south-east of Wilkes. Surface elevations were measured by barometric methods and ice thicknesses were determined by gravity and seismic techniques. Magnetic measurements were made and borehole temperatures were taken. Experiments were conducted to devise means of improving the quality of the seismic reflection records. The optimum frequency range for the filter settings was found to be 90-215 c/s. A hand-drilled 4-ft shot-hole was adequate in the coastal or low plateau regions within 150 miles of Wilkes. Further inland, a shot hole of at least 30-ft depth was required. The optimum charge size was one pound of explosive.