Wegener Canyon bathymetry and results from rock dredging near ODP sites 691-693, eastern Weddell Sea, Antarctica

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doi: 10.2973/odp.proc.sr.113.178.1990
Author(s): Fütterer, Dieter Karl; Kuhn, Gerhard; Schenke, Hans Werner
Author Affiliation(s): Primary:
Alfred-Wegener Inst. Polar and Mar. Res., Bremerhaven, Federal Republic of Germany
Univ. R.I. at Narragansett, United States
Ocean Drilling Program, United States
Tex. A&M Univ., United States
Lamont-Doherty Geol. Obs., United States
Univ. Oslo, Norway
Alfred Wegener Inst. Polar and Ocean Res., Federal Republic of Germany
Univ. Southampton, United Kingdom
Univ. Tex. at Austin, United States
Woods Hole Oceanogr. Inst., United States
Fed. Inst. Tech., Switzerland
Univ. Tokyo, Japan
Mem. Univ. Newfoundland, Canada
CNRS-Luminy, France
R. Ont. Mus., Canada
Univ. Bremen, Federal Republic of Germany
Wesleyan Univ., United States
Fla. State Univ., United States
Volume Title: Proceedings of the Ocean Drilling Program, Weddell Sea, Antarctica, covering Leg 113 of the cruises of the Drilling Vessel JOIDES Resolution, Valparaiso, Chile, to East Cove, Falkland Islands, sites 689-697, 25 December 1986-11 March 1987
Volume Author(s): Barker, Peter F.; Kennett, James P.; O'Connell, Suzanne B.; Berkowitz, Stephen; Bryant, William R.; Burckle, Lloyd H.; Egeberg, Per Kristian; Fütterer, Dieter Karl; Gersonde, Rainer Erich; Golovchenko, Xenia; Hamilton, Norman; Lawver, Lawrence; Lazarus, David B.; Lonsdale, Malcolm J.; Mohr, Barbara A. R.; Nagao, Toshiyasu; Pereira, Christopher P. G.; Pudsey, Carol J.; Robert, Christian M.; Schandl, Eva S.; Spiess, Volkhard; Stott, Lowell D.; Thomas, Ellen; Thompson, Keith F. M.; Wise, Sherwood W., Jr.; Kennett, Diana M.; Masterson, Amanda; Stewart, Norman J.
Source: Proceedings of the Ocean Drilling Program, Weddell Sea, Antarctica, covering Leg 113 of the cruises of the Drilling Vessel JOIDES Resolution, Valparaiso, Chile, to East Cove, Falkland Islands, sites 689-697, 25 December 1986-11 March 1987, Peter F. Barker, James P. Kennett, Suzanne B. O'Connell, Stephen Berkowitz, William R. Bryant, Lloyd H. Burckle, Per Kristian Egeberg, Dieter Karl Fütterer, Rainer Erich Gersonde, Xenia Golovchenko, Norman Hamilton, Lawrence Lawver, David B. Lazarus, Malcolm J. Lonsdale, Barbara A. R. Mohr, Toshiyasu Nagao, Christopher P. G. Pereira, Carol J. Pudsey, Christian M. Robert, Eva S. Schandl, Volkhard Spiess, Lowell D. Stott, Ellen Thomas, Keith F. M. Thompson, Sherwood W. Wise, Jr., Diana M. Kennett, Amanda Masterson and Norman J. Stewart. Proceedings of the Ocean Drilling Program, Scientific Results, Vol.113, p.39-48. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0884-5891
Note: In English. 22 refs.; illus. incl. 2 tables, sketch map
Summary: Systematic bathymetric surveys to map the Wegener Canyon with the multibeam sonar system SEABEAM were carried out during the Polarstern cruises in 1985, 1986, and 1987. Wegener Canyon is one of the larger canyon systems along the antarctic continental margin of the eastern Weddell sea. It represents a prominent northwest-trending system of deep incisions of variable depth, extending over about 85 km from the shelf break to the continental rise. On the lower continental slope the canyon has been cut to a depth of about 1200 m. It has a width of 4 km at the bottom and 10 km between its shoulders, and measures about 25 km in length. Mesozoic sediments were dredged at eight stations on the scarps on the southwestern flank of Wegener Canyon. Volcaniclastic sandstones and mudstones, nannofossil oozes, and claystones rich in organic matter were recovered. Physiographic and structural settings interpreted from seismic data, together with preliminary results from the lithologies recovered, clearly indicate that the beds cropping out in the upper scarp are as old as the Early Cretaceous sediments drilled at ODP Sites 692 and 693. The middle and lower scarps consist of lowermost Cretaceous to Upper Jurassic sediments, which were not reached by drilling, providing additional information for the interpretation of the pre-Valanginian/Aptian sedimentary environment in the Weddell Sea. (Auth. mod.)
Year of Publication: 1990
Research Program: ODP Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; 20 Geophysics, Applied; Antarctic Ocean; Bathymetry; Bottom features; Correlation; Deposition; Dredging; Environment; Geophysical methods; Geophysical surveys; Leg 113; Marine geology; ODP Site 691; ODP Site 692; ODP Site 693; Ocean Drilling Program; Ocean floors; Oceanography; Seabeam; Seismic methods; Seismic stratigraphy; Southern Ocean; Submarine canyons; Surveys; Weddell Sea; Wegener Canyon
Coordinates: S704954 S614837 E0030559 W0432706
Record ID: 1991051145
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States