Paleoflow directions of Albian basin-floor turbidity currents in the Newfoundland Basin

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doi: 10.2973/odp.proc.sr.210.103.2007
Author(s): Hiscott, Richard N.
Ocean Drilling Program, Leg 210, Shipboard Scientfic Party, College Station, TX
Author Affiliation(s): Primary:
Memorial University of Newfoundland, Earth Sciences Department, St. John's, NF, Canada
Other:
IFREMER Centre de Brest, France
Ocean Drilling Program, United States
University of Michigan, United States
University of Leicester, United Kingdom
Stockholm University, Sweden
Université Pierre et Marie Curie, France
Memorial University of Newfoundland, Canada
Lamont-Doherty Earth Observatory, United States
Florida State University, United States
University of Massachusetts, United States
National Taiwan Ocean University, Taiwan
Ecole et Observatoire des Sciences de la Terre, France
California State University, Northridge, United States
Bundesanstalt für Geowissenschaften und Rohstoffe, Federal Republic of Germany
Universität Tübingen, Federal Republic of Germany
University of Edinburgh, United Kingdom
Rice University, United States
Pennsylvania State University, United States
University of Wyoming, United States
University of Tokyo, Japan
National University of Ireland, Galway, Ireland
Shimane University, Japan
Rosenstiel School of Marine and Atmospheric Science, United States
Open University, United Kingdom
University of California, Santa Cruz, United States
Volume Title: Proceedings of the Ocean Drilling Program; scientific results; drilling the Newfoundland half of the Newfoundland-Iberia transect; the first conjugate margin drilling in a nonvolcanic rift; covering Leg 210 of the cruises of the Drilling Vessel JOIDES Resolution; St. Georges, Bermuda, to St. John's, Newfoundland; sites 1276 and 1277; 6 July-6 September 2003
Volume Author(s): Tucholke, Brian E.; Sibuet, Jean-Claude; Klaus, Adam; Arnaboldi, Michela; Delius, Heike; Engstrom, Anna V.; Galbrun, Bruno; Gardin, Silvia; Hiscott, Richard N.; Karner, Garry D.; Ladner, Bryan C.; Leckie, R. Mark; Lee, Chao-Shing; Manatschal, Gianreto; Marsaglia, Kathleen M.; Pletsch, Thomas K.; Pross, Jörg; Robertson, Alastair H. F.; Sawyer, Dale S.; Sawyer, Derek E.; Shillington, Donna J.; Shirai, Masaaki; Shryane, Thérèse; Stant, Sharon Audra; Takata, Hiroyuki; Urquhart, Elspeth; Wilson, Chris; Zhao, Xixi
Source: Proceedings of the Ocean Drilling Program; scientific results; drilling the Newfoundland half of the Newfoundland-Iberia transect; the first conjugate margin drilling in a nonvolcanic rift; covering Leg 210 of the cruises of the Drilling Vessel JOIDES Resolution; St. Georges, Bermuda, to St. John's, Newfoundland; sites 1276 and 1277; 6 July-6 September 2003, Brian E. Tucholke, Jean-Claude Sibuet, Adam Klaus, Michela Arnaboldi, Heike Delius, Anna V. Engstrom, Bruno Galbrun, Silvia Gardin, Richard N. Hiscott, Garry D. Karner, Bryan C. Ladner, R. Mark Leckie, Chao-Shing Lee, Gianreto Manatschal, Kathleen M. Marsaglia, Thomas K. Pletsch, Jörg Pross, Alastair H. F. Robertson, Dale S. Sawyer, Derek E. Sawyer, Donna J. Shillington, Masaaki Shirai, Thérèse Shryane, Sharon Audra Stant, Hiroyuki Takata, Elspeth Urquhart, Chris Wilson and Xixi Zhao; Ocean Drilling Program, Leg 210, Shipboard Scientfic Party, College Station, TX. Proceedings of the Ocean Drilling Program, Scientific Results (CD ROM), Vol.210, 27p. Publisher: Texas A&M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 1096-2514
Note: In English. 45 refs. @sects., sketch map ; WWW format, ISSN 1096-7451
Summary: Albian turbidites and intercalated shales were cored from ∼1145 to 1700 meters below seafloor at Site 1276 in the Newfoundland Basin. Strata at this level dip ∼2.5° seaward (toward an azimuth of ∼130°) based on seismic profiles. In contrast, beds dip an average of ∼10° in the cores. This higher apparent dip is the sum of the ∼2.5° seaward dip and a measured hole deviation of 7.43°, which must be essentially in the same seaward direction. Using the maximum dip direction in the cores as a reference direction, paleocurrents were measured from 11 current-ripple foresets and 11 vector means of grain fabric in planar-laminated sandstones. Five of the planar-laminated sandstone samples have a grain imbrication ≥8°, permitting specification of a unique flow direction rather than just the line-of-motion of the current. Both ripples and grain fabric point to unconfined flow toward the north-northeast. There is considerable spread in the data so that some paleoflow indicators point toward the northwest, whereas others point southeast. Nevertheless, the overall pattern of paleoflow suggests a source for the turbidity currents on the southeastern Grand Banks, likely from the long-emergent Avalon Uplift in that area. On average, turbidity currents apparently flowed axially in the young Albian rift, toward the north. This is opposite to what might be expected for a northward-propagating rift and a young ocean opening in a zipperlike fashion from south to north.
Year of Publication: 2007
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; 20 Geophysics, Applied; @sects., sketch map; Albian; Atlantic Ocean; Boreholes; Canada; Clastic rocks; Continental margin; Cores; Cretaceous; Currents; Eastern Canada; Fabric; Flemish Cap; Geophysical methods; Geophysical profiles; Geophysical surveys; Grand Banks; Leg 210; Lithofacies; Lithostratigraphy; Lower Cretaceous; Mesozoic; Newfoundland; Newfoundland and Labrador; North Atlantic; Northwest Atlantic; ODP Site 1276; Ocean Drilling Program; Paleo-oceanography; Paleocurrents; Paleogeography; Reconstruction; Sedimentary rocks; Seismic methods; Seismic profiles; Seismic stratigraphy; Shale; Surveys; Turbidite; Turbidity; Turbidity currents
Coordinates: N452400 N452400 W0444700 W0444700
Record ID: 2007087750
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