Bore-Hole Survey at Dye 3, South Greenland
Open Access
- 1 January 1984
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Glaciology
- Vol. 30 (106), 282-288
- https://doi.org/10.1017/s0022143000006109
Abstract
In 1983 three directional surveys were made in the bore hole from which a deep ice core was obtained in the summers of 1979–81. The inclination and azimuth of the bore hole were measured on three surveys, temperature was included on two surveys, fluid pressure and hole diameter on one of the surveys. Fluid-pressure measurements show that the ice-overburden pressure was undercompensated in the upper few hundred meters and overcompensated at the bottom of the hole. Diameter measurements show closure in the upper portion and expansion near the bottom beginning at the transition from the Holocene to Wisconsin ice at 1784 m. The hole expansion and increase in inclination correlate with dust and silt content in the Wisconsin ice. Changes in azimuth are due to flow of the ice and are consistent with the direction of flow at the surface. Temperature measurements show that the hole is at or near equilibrium. The gradient of 0.012 K/m below 1400 m is less than the 0.018 K/m at Camp Century. There is a slight reduction in gradient near the bottom from internal friction in the silty ice.Keywords
This publication has 16 references indexed in Scilit:
- Measurements of radar wave speeds in polar glaciers using a down-hole radar target techniqueCold Regions Science and Technology, 1983
- Deformation within polar ice sheets: An analysis of the Byrd Station and Camp Century borehole-tilting measurementsCold Regions Science and Technology, 1983
- Who Discovered Antarctica? - A. G. E. Jones Antarctica observed. Whitby, Caedmon, 1981, 130 p, illus. £7.95.Polar Record, 1983
- Secondary and tertiary creep of glacier ice as measured by borehole closure ratesReviews of Geophysics, 1977
- Resurvey of the “byrd” station, Antarctica, drill holeJournal of Glaciology, 1976
- Climatic changes, Norsemen and modern manNature, 1975
- A Comparison of Various Directional Survey Models and an Approach To Model Error AnalysisJournal of Petroleum Technology, 1972
- A Flow Model and a Time Scale for the Ice Core from Camp Century, GreenlandJournal of Glaciology, 1969
- Comparison between measured and theoretical temperature profiles of the Camp Century, Greenland, BoreholeJournal of Geophysical Research, 1968
- Convection Currents in GeysersGeophysical Supplements to the Monthly Notices of the Royal Astronomical Society, 1937