Geophysical signatures of the Angulhas Ridge and Meteor Rise, Indo-Atlantic Basin

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doi: 10.2973/odp.proc.ir.114.103.1988
Author(s): Raymond, Carol A.; LaBrecque, John L.
Author Affiliation(s): Primary:
Lamont-Doherty Geol. Obs., Palisades, NY, United States
Other:
Univ. Bergen, Norway
Tex. A&M Univ., United States
UNOCAL Geophys., United States
Univ. Pau, France
Br. Pet. Co., United Kingdom
Christian-Albrechts Univ. Kiel, Federal Republic of Germany
Lamont-Doherty Geol. Obs., United States
Univ. Southampton, United Kingdom
North. Ill. Univ., United States
Univ. Kiel, United Kingdom
Geol. Surv. Can., Canada
Univ. Waterloo, Canada
Univ. Perugia, Italy
Calif. State Univ. at Hayward, United States
Alfred Wegener Inst. Polar und Meeresforsch., Federal Republic of Germany
Volume Title: Proceedings of the Ocean Drilling Program, subantarctic South Atlantic, covering Leg 114 of the cruises of the drilling vessel JOIDES Resolution, East Cove, Falkland Islands, to Port Louis, Mauritius, sites 698-704, 11 March 1987-13 May 1987
Volume Author(s): Ciesielski, Paul F.; Kristoffersen, Yngve; Clement, Bradford; Blangy, Jean-Pierre; Bourrouilh, Robert; Crux, Jason A.; Fenner, Juliane M.; Froelich, Philip N.; Hailwood, Ernest A.; Hodell, David A.; Katz, Miriam E.; Ling, Hsin Yi; Mienert, Jürgen; Müller, Daniel W.; Mwenifumbo, C. Jonathan; Nobes, David C.; Nocchi, Marisa; Warnke, Detlef A.; Westall, Frances; Mazzullo, Elsa Kapitan
Source: Proceedings of the Ocean Drilling Program, subantarctic South Atlantic, covering Leg 114 of the cruises of the drilling vessel JOIDES Resolution, East Cove, Falkland Islands, to Port Louis, Mauritius, sites 698-704, 11 March 1987-13 May 1987, Paul F. Ciesielski, Yngve Kristoffersen, Bradford Clement, Jean-Pierre Blangy, Robert Bourrouilh, Jason A. Crux, Juliane M. Fenner, Philip N. Froelich, Ernest A. Hailwood, David A. Hodell, Miriam E. Katz, Hsin Yi Ling, Jürgen Mienert, Daniel W. Müller, C. Jonathan Mwenifumbo, David C. Nobes, Marisa Nocchi, Detlef A. Warnke, Frances Westall and Elsa Kapitan Mazzullo. Proceedings of the Ocean Drilling Program, Part A: Initial Reports, Vol.114, p.27-33. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0884-5883 CODEN: IDSDA6
Note: In English. 20 refs. Bathym. map; sketch maps
Summary: Sea Beam, single-channel seismic, gravimetric, and magnetic data were gathered on the Agulhas Ridge and Meteor Rise in the Indo-Atlantic Basin from aboard Robert D. Conrad to provide site survey data for the eastern part of the area investigated during ODP Leg 114 in the subantarctic South Atlantic. Results of the Conrad cruise are presented, including a revised bathymetric map of the area. These data define the morphology of the Agulhas Ridge and detail the structure of the Meteor Rise. The Agulhas Fracture Zone Ridge most likely formed as a result of changes in the direction of spreading in the Agulhas Basin. The morphology of the Meteor Rise is consistent with models for production of thick basaltic sequences at developing rifts. Geophysical data from the Meteor Rise may suggest a post-rift phase of volcanism that emplaced the high-relief seamount province on the eastern rim of the Meteor Rise; this hypothesis deserves further investigation. (Auth.)
Year of Publication: 1988
Research Program: ODP Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; 20 Geophysics, Applied; Acoustical methods; Angulhas Basin; Atlantic Ocean; Bathym. map; Bathymetric maps; Geophysical methods; Geophysical surveys; Gravity methods; Indo-Atlantic Basin; Leg 114; Magnetic anomalies; Magnetic methods; Maps; Marine geology; Meteor Rise; Ocean Drilling Program; Oceanography; Seabeam; Seismic methods; South Atlantic; Surveys
Coordinates: S515905 S465245 E0075341 W0330558
Record ID: 1989013048
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States