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The Goban Spur transect: Geologic evolution of a sediment-starved passive continental margin

1985; Geological Society of America; Volume: 96; Issue: 1 Linguagem: Inglês

10.1130/0016-7606(1985)96 2.0.co;2

1943-2674

Pierre Charles de Graciansky, C. Wylie Poag, Robert Cunningham, Paul Loubere, Douglas G. Masson, J. Mazzullo, L. Montadert, Carla Müller, Kenichi Otsuka, Leslie Reynolds, Jacques Sigal, Scott W. Snyder, HILLARY A. TOWNSEND, STEPHANOS P. VAOS, Douglas Waples,

Geological and Geochemical Analysis

Research Article| January 01, 1985 The Goban Spur transect: Geologic evolution of a sediment-starved passive continental margin PIERRE CHARLES DE GRACIANSKY; PIERRE CHARLES DE GRACIANSKY 1Ecole Nationale Superieure des Mines, 60 Boulevard Saint Michel, 75272 Paris Cedex 06, France Search for other works by this author on: GSW Google Scholar C. WYLIE POAG; C. WYLIE POAG 2U.S. Geological Survey, Woods Hole, Massachusetts, 02543 Search for other works by this author on: GSW Google Scholar ROBERT CUNNINGHAM, JR.; ROBERT CUNNINGHAM, JR. 3Exxon Production Research Company, P.O. Box 2189, Houston, Texas 77001 Search for other works by this author on: GSW Google Scholar PAUL LOUBERE; PAUL LOUBERE 4Department of Geology, Northern Illinois University, De Kalb, Illinois 60115 Search for other works by this author on: GSW Google Scholar DOUGLAS G. MASSON; DOUGLAS G. MASSON 5Institute of Oceanographic Sciences, Brook Road, Wormley, Godalming, Surrey, United Kingdom Search for other works by this author on: GSW Google Scholar JAMES M. MAZZULLO; JAMES M. MAZZULLO 6Department of Geology, Texas A&M University, College Station, Texas 77840 Search for other works by this author on: GSW Google Scholar LUCIEN MONTADERT; LUCIEN MONTADERT 7Institut Francais du Petrole, 1 et 4, avenue de Bois-Prénu, 92506 Rueil-Malmaison, France Search for other works by this author on: GSW Google Scholar CARLA MÜLLER; CARLA MÜLLER 8Geologisch-Palaontologisches Institut, Universitat Frankfurt/Main, 32-32 Senckenberg - Anlage, 6000 Frankfurt/Main, West Germany. Search for other works by this author on: GSW Google Scholar KENICHI OTSUKA; KENICHI OTSUKA 9Institute of Geosciences, Faculty of Science, Shizuoka University, Shizuoka 422, Japan Search for other works by this author on: GSW Google Scholar LESLIE A. REYNOLDS; LESLIE A. REYNOLDS 10U.S. Geological Survey, Woods Hole, Massachusetts, 02543 Search for other works by this author on: GSW Google Scholar JACQUES SIGAL; JACQUES SIGAL 1133 rue de Montreuil, 94300 Vincennes, France Search for other works by this author on: GSW Google Scholar SCOTT W. SNYDER; SCOTT W. SNYDER 12Department of Geology, East Carolina University, Greenville, North Carolina, 27834 Search for other works by this author on: GSW Google Scholar HILLARY A. TOWNSEND; HILLARY A. TOWNSEND 13Department of Oceanography, University of Southampton, Southampton SO9 5NH, United Kingdom Search for other works by this author on: GSW Google Scholar STEPHANOS P. VAOS; STEPHANOS P. VAOS 14Department of Geology, Florida State University, Tallahassee, Florida 32306 Search for other works by this author on: GSW Google Scholar DOUGLAS WAPLES DOUGLAS WAPLES 15Mobil Research and Development Corporation, Field Research Laboratory, P.O. Box 900, Dallas, Texas, 75221 Search for other works by this author on: GSW Google Scholar Author and Article Information PIERRE CHARLES DE GRACIANSKY 1Ecole Nationale Superieure des Mines, 60 Boulevard Saint Michel, 75272 Paris Cedex 06, France C. WYLIE POAG 2U.S. Geological Survey, Woods Hole, Massachusetts, 02543 ROBERT CUNNINGHAM, JR. 3Exxon Production Research Company, P.O. Box 2189, Houston, Texas 77001 PAUL LOUBERE 4Department of Geology, Northern Illinois University, De Kalb, Illinois 60115 DOUGLAS G. MASSON 5Institute of Oceanographic Sciences, Brook Road, Wormley, Godalming, Surrey, United Kingdom JAMES M. MAZZULLO 6Department of Geology, Texas A&M University, College Station, Texas 77840 LUCIEN MONTADERT 7Institut Francais du Petrole, 1 et 4, avenue de Bois-Prénu, 92506 Rueil-Malmaison, France CARLA MÜLLER 8Geologisch-Palaontologisches Institut, Universitat Frankfurt/Main, 32-32 Senckenberg - Anlage, 6000 Frankfurt/Main, West Germany. KENICHI OTSUKA 9Institute of Geosciences, Faculty of Science, Shizuoka University, Shizuoka 422, Japan LESLIE A. REYNOLDS 10U.S. Geological Survey, Woods Hole, Massachusetts, 02543 JACQUES SIGAL 1133 rue de Montreuil, 94300 Vincennes, France SCOTT W. SNYDER 12Department of Geology, East Carolina University, Greenville, North Carolina, 27834 HILLARY A. TOWNSEND 13Department of Oceanography, University of Southampton, Southampton SO9 5NH, United Kingdom STEPHANOS P. VAOS 14Department of Geology, Florida State University, Tallahassee, Florida 32306 DOUGLAS WAPLES 15Mobil Research and Development Corporation, Field Research Laboratory, P.O. Box 900, Dallas, Texas, 75221 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1985) 96 (1): 58–76. https://doi.org/10.1130/0016-7606(1985)96 2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation PIERRE CHARLES DE GRACIANSKY, C. WYLIE POAG, ROBERT CUNNINGHAM, PAUL LOUBERE, DOUGLAS G. MASSON, JAMES M. MAZZULLO, LUCIEN MONTADERT, CARLA MÜLLER, KENICHI OTSUKA, LESLIE A. REYNOLDS, JACQUES SIGAL, SCOTT W. SNYDER, HILLARY A. TOWNSEND, STEPHANOS P. VAOS, DOUGLAS WAPLES; The Goban Spur transect: Geologic evolution of a sediment-starved passive continental margin. GSA Bulletin 1985;; 96 (1): 58–76. doi: https://doi.org/10.1130/0016-7606(1985)96 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Leg 80 of the DSDP-IPOD program drilled a transect of four core holes (548–551) across the continent-ocean boundary at Goban Spur, a prominent southwest-trending structural high on the Irish continental slope. Multichannel seismic-reflection profiles show that, during rifting, continental basement rocks of Goban Spur were broken up by northwest-trending listric normal faults to form a series of half-graben basins. Two of these half-grabens were sampled during Leg 80 (Sites 548 and 549). Site 550 was located on the adjacent oceanic crust of Porcupine Abyssal Plain. Site 551 was located on transitional crust at the foot of Goban Spur. The objectives were lo analyze the structural, the depositional, and the paleoenvironmental development of this sediment-starved passive continental margin. At Sites 548 and 549, basement comprises continental Hercynian metasediments of Devonian age; at Sites 550 and 551, the basement is tholeiitic basalt. The oldest syn-rift sediments (Barremian age, or perhaps late Hauterivian) were penetrated at Site 549, lying uuconformably below Aptian? strata. Seismic sequence analysis reveals that Aptian? strata also overlie this unconformity farther northeastward in the basin. An unconformity above the Aptian? section marks the end of rifting and the beginning of sea-floor spreading. An Albian age for the initiation of sea-floor spreading was corroborated at Site 550 where abyssal late Albian chalks rest upon and are interbedded with oceanic basalts, indicating an initial water depth of ∼2,000 m.As sea-floor spreading progressed, Goban Spur subsided rapidly, so that by Cenomanian time, bathyal to abyssal chalks were accumulating at deeper sites. After two periods of partial stagnation in the Aptian-Albian and in the Turonian, chalk deposition in well-oxygenated environments took place at all sites, modified chiefly by shifts in deep-circulation patterns and the calcite compensation depth (CCD), by periodic influx of terrigenous detritus during low stands of sea level (especially in the Cenozoic), and by frequent displacement of older carbonates from the slope to abyssal sites.A number of major unconformities correspond to those most often reported from other widespread locations in the North Atlantic Basin and on surrounding continental shelves and coastal plains. Several unconformities are preserved undisturbed in our cores and can be correlated with sea-level fluctuations, with paleoceanographic events, and with tectonic movements.A thick Quaternary section at Site 548 records prominent fluctuations of glacial-inter-glacial paleoclimates. An even thicker Paleogene section at Site 549 provides unusually well-preserved and uninterrupted sequences suitable for detailed sedimentological and stratigraphic studies. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.