Underway geophysics during Leg 113

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doi: 10.2973/odp.proc.ir.113.104.1988
Author(s): Lawver, Lawrence A.; Lonsdale, Malcolm J.
Author Affiliation(s): Primary:
Univ. Tex. at Austin, Inst. Geophys., Austin, TX, United States
Univ. Calif. at Santa Barbara, United States
Tex. A&M Univ., United States
Lamont-Doherty Geol. Obs., United States
Univ. Oslo, Norway
Alfred Wegener Inst. Polar und Meeresforsch., Federal Republic of Germany
Univ. Southampton, United Kingdom
Univ. Tex. at Austin, United States
Woods Hole Oceanogr. Inst., United States
Univ. Birmingham, United Kingdom
Geol. Inst. ETH, Switzerland
Univ. Tokyo, Japan
Mem. Univ., Canada
CNRS-Luminy, France
R. Ont. Mus., Canada
Univ. Bremen, Federal Republic of Germany
Univ. R.I., United States
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; Berkowitz, Stephen P.; Bryant, William R.; Burckle, Lloyd H.; Egeberg, Per Kristian; Fütterer, Dieter Karl; Gersonde, Rainer Erich; Golovchenko, Xenia; Hamilton, Norman; Lawver, Lawrence A.; Lazarus, David B.; Lonsdale, Malcolm J.; Mohr, Barbara A.; 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.; 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 O'Connell, Stephen P. Berkowitz, William R. Bryant, Lloyd H. Burckle, Per Kristian Egeberg, Dieter Karl Fütterer, Rainer Erich Gersonde, Xenia Golovchenko, Norman Hamilton, Lawrence A. Lawver, David B. Lazarus, Malcolm J. Lonsdale, Barbara A. 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. and Norman J. Stewart. Proceedings of the Ocean Drilling Program, Part A: Initial Reports, Vol.113, p.33-76. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0884-5883 CODEN: IDSDA6
Note: In English. 11 refs.; illus. incl. 1 table, sects., charts
Summary: Underway geophysics data were acquired by the JOIDES Resolution and the ice-picket vessel Maersk Master during Leg 113. Resolution acquired 12- and 3.5 kHz bathymetric high-resolution seismic, single-channel seismic, and magnetic data near drill-site locations. Bathymetric, high-resolution seismic, and magnetic data were acquired during most transit periods aboard Resolution while single-channel seismic data were collected during 30% of the between-site transit periods, mostly in the southern Weddell Sea region and in the Scotia Sea. Maersk Master was equipped to collect magnetic data which it did during all transit periods as well as during surveys done while the drillship was on site. Maersk Master also acquired a limited quantity of bathymetric data with a shallow-water (50-kHz) echo-sounder. The tracks of the two ships are shown with the intervals where single-channel seismic data were collected. The seismic profiles during transit between sites were collected at speeds between 10 and 12 kt. In the vicinity of the drill sites, the data were acquired at speeds of 4-6 kt to achieve a better signal-to-noise ratio. Toward the end of the leg, sea states greater than 7 were encountered and generated significant noise that made interpretation of the seismic data difficult. (Auth.)
Year of Publication: 1988
Research Program: ODP Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; 20 Geophysics, Applied; Antarctic Ocean; Echo sounding; Geophysical methods; Geophysical surveys; Leg 113; Magnetic methods; Magnetometers; Marine geology; Maud Rise; ODP Site 689; ODP Site 690; ODP Site 691; ODP Site 692; ODP Site 693; ODP Site 694; ODP Site 695; ODP Site 696; ODP Site 697; Ocean Drilling Program; Oceanography; Seismic methods; Southern Ocean; Surveys; Weddell Sea
Coordinates: S704954 S614837 E0030559 W0432706
Record ID: 1989003952
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