Structure and dynamics of the Lambert Glacier-Amery ice shelf system; implications for the origin of Prydz Bay sediments

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doi: 10.2973/odp.proc.sr.119.201.1991
Author(s): Hambrey, Michael J.
Author Affiliation(s): Primary:
Alfred Wegener Inst. Polar and Mar. Res., Bremerhaven, Federal Republic of Germany
Other:
Tech. Univ. Denmark, Denmark
Ocean Drill. Program, United States
CPRG, France
Tex. A&M Univ., United States
Mus. Hist. Nat., France
Stanford Univ., United States
Bedford Inst. Oceanogr., Canada
Hawaii Inst. Geophys., United States
Alfred Wegener Inst. Polar and Mar. Res., Federal Republic of Germany
Cambridge Univ., United Kingdom
Ohio State Univ., United States
Univ. Sydney, Australia
Ruhr Univ. Bochum, Federal Republic of Germany
Lamont-Doherty Geol. Obs., United States
Toyama Univ., Japan
Dalhousie Univ., Canada
Norw. Polar Res. Inst., Norway
Univ. Tex. at Port Aransas, United States
Eidg. Tech. Hochsch., Federal Republic of Germany
Plymouth Polytech., United Kingdom
Univ. Newcastle upon Tyne, United Kingdom
Fla. State Univ., United States
Volume Title: Proceedings of the Ocean Drilling Program, Kerguelen Plateau-Prydz Basin; covering Leg 119 of the cruises of the drilling vessel JOIDES Resolution, Port Louis, Mauritius to Fremantle, Australia, sites 736-746, 14 December 1987-20 February 1988
Volume Author(s): Barron, John A.; Larsen, Birger; Baldauf, Jack G.; Alibert, Chantal; Berkowitz, Stephen; Caulet, Jean-Pierre; Chambers, Stephen R.; Cooper, Alan K.; Cranston, Ray E.; Dorn, Wolfgang U.; Ehrmann, Werner U.; Fox, Richard D.; Fryxell, Greta A.; Hambrey, Michael J.; Huber, Brian T.; Jenkins, Christopher J.; Kang, Sung-Ho; Keating, Barbara H.; Mehl, Klaus W.; Noh, Il; Ollier, Gilles; Pittenger, Alan; Sakai, Hideo; Schroder, Claudia J.; Solheim, Anders; Stockwell, Dean A.; Thierstein, Hans R.; Tocher, Bruce; Turner, Brian R.; Wei, Wuchang; Mazzullo, Elsa Kapitan; Stewart, Norman J.
Source: Proceedings of the Ocean Drilling Program, Kerguelen Plateau-Prydz Basin; covering Leg 119 of the cruises of the drilling vessel JOIDES Resolution, Port Louis, Mauritius to Fremantle, Australia, sites 736-746, 14 December 1987-20 February 1988, John A. Barron, Birger Larsen, Jack G. Baldauf, Chantal Alibert, Stephen Berkowitz, Jean-Pierre Caulet, Stephen R. Chambers, Alan K. Cooper, Ray E. Cranston, Wolfgang U. Dorn, Werner U. Ehrmann, Richard D. Fox, Greta A. Fryxell, Michael J. Hambrey, Brian T. Huber, Christopher J. Jenkins, Sung-Ho Kang, Barbara H. Keating, Klaus W. Mehl, Il Noh, Gilles Ollier, Alan Pittenger, Hideo Sakai, Claudia J. Schroder, Anders Solheim, Dean A. Stockwell, Hans R. Thierstein, Bruce Tocher, Brian R. Turner, Wuchang Wei, Elsa Kapitan Mazzullo and Norman J. Stewart. Proceedings of the Ocean Drilling Program, Scientific Results, Vol.119, p.61-75. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0884-5891
Note: In English. 30 refs.; illus. incl. 2 tables, 1 plate, sketch map
Summary: Depositional processes in Prydz Bay during the past 40 m.y. or so have been strongly influenced by glacier ice. Therefore, to understand these processes better, and to define the source areas of the sediment, it is necessary to determine the role of the different ice masses entering the bay. Ice thickness, topography, and ice velocity data indicate that the Lambert Glacier-Amery Ice Shelf system is one of the most important routes for the discharge of ice from the East Antarctic Ice Sheet, and in the past has been the dominant influence on sedimentation in Prydz Bay. Most of the flow is concentrated through the Lambert Graben, which has been overdeepened to a depth of 2500 m below sea level. Glaciological work has indicated that close to the grounding line there is considerable melting, but from a short distance seaward of this position, basal freeze-on of ice of oceanic origin occurs. Thus nearly all the basal debris load in the Lambert Glacier system may be deposited close to the grounding line, and there is probably negligible deposition beneath the major part of the Amery Ice Shelf. Englacial debris, delivered to the open sea through the interior of the ice shelf, will be deposited from icebergs. (Auth. mod.)
Year of Publication: 1991
Research Program: ODP Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; Amery ice masses; Antarctic Ocean; Antarctica; Continental shelf; Deposition; Environment; Glacial environment; Glacial geology; Glaciation; Ice movement; Lambert Glacier; Leg 119; Mac Robertson Land; Marine geology; Ocean Drilling Program; Oceanography; Processes; Provenance; Prydz Bay; Sedimentation; Southern Ocean
Coordinates: S682310 S593249 E0855147 E0744125
Record ID: 1991059015
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States