Sediment flux, east Greenland margin. Final report, 1 October 1988-1 September 1991
Abstract
We investigated sediment flux across an ice-dominated, high latitude continental margin, using cores from the East Greenland Shelf (ca. 68 deg N). Density, weight percentages of the various sediment components, and sediment/age relations (AMS C- 14 dates) were investigated from cores collected 1988 and 1990. High-resolution DTS Huntec surveys indicated 10-20 m of acoustically transparent sediment. Maximum core length was 3 m and most of the gravity cores were between 1-2 m. The radiocarbon assays show that basal core sediments date between ca. 9,000 and 14,500 BP. The acoustic characteristics, the low dry volume densities (ca. 600 kg/m3 and the faunal and floral assemblages) suggest ice-distal conditions between ca. 14,500 and the present. Net sediment flux in the Kangerdlugssuaq Trough during the last 14,500 years has been low; this might be explained by either (1) cold-based glaciological conditions of the East Greenland ice sheet; and/or (2) efficient sediment trap(s) lying along the inner shelf/fjords of East Greenland.
- Authors:
- Publication Date:
- Research Org.:
- Colorado Univ., Boulder, CO (United States). Inst. of Arctic and Alpine Research
- OSTI Identifier:
- 6731862
- Report Number(s):
- AD-A-258067/8/XAB
CNN: N00014-89-J-1013
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; GREENLAND; GEOPHYSICAL SURVEYS; ACOUSTICS; CONTINENTAL MARGIN; DATES; DENSITY; ICE; LENGTH; RESOLUTION; SEDIMENTS; STATISTICAL DATA; SURVEYS; WEIGHT; DATA; DIMENSIONS; FOOD; FRUITS; INFORMATION; NUMERICAL DATA; PHYSICAL PROPERTIES; 580000* - Geosciences
Citation Formats
Andrews, J T, and Williams, K M. Sediment flux, east Greenland margin. Final report, 1 October 1988-1 September 1991. United States: N. p., 1991.
Web.
Andrews, J T, & Williams, K M. Sediment flux, east Greenland margin. Final report, 1 October 1988-1 September 1991. United States.
Andrews, J T, and Williams, K M. 1991.
"Sediment flux, east Greenland margin. Final report, 1 October 1988-1 September 1991". United States.
@article{osti_6731862,
title = {Sediment flux, east Greenland margin. Final report, 1 October 1988-1 September 1991},
author = {Andrews, J T and Williams, K M},
abstractNote = {We investigated sediment flux across an ice-dominated, high latitude continental margin, using cores from the East Greenland Shelf (ca. 68 deg N). Density, weight percentages of the various sediment components, and sediment/age relations (AMS C- 14 dates) were investigated from cores collected 1988 and 1990. High-resolution DTS Huntec surveys indicated 10-20 m of acoustically transparent sediment. Maximum core length was 3 m and most of the gravity cores were between 1-2 m. The radiocarbon assays show that basal core sediments date between ca. 9,000 and 14,500 BP. The acoustic characteristics, the low dry volume densities (ca. 600 kg/m3 and the faunal and floral assemblages) suggest ice-distal conditions between ca. 14,500 and the present. Net sediment flux in the Kangerdlugssuaq Trough during the last 14,500 years has been low; this might be explained by either (1) cold-based glaciological conditions of the East Greenland ice sheet; and/or (2) efficient sediment trap(s) lying along the inner shelf/fjords of East Greenland.},
doi = {},
url = {https://www.osti.gov/biblio/6731862},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 17 00:00:00 EDT 1991},
month = {Tue Sep 17 00:00:00 EDT 1991}
}