Other ID: FAY 021
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Principal Investigator(s): Kim D. Klitgord
Data Type(s): Electro-Magnetic: Gravity, Location-Elevation: Navigation, Seismics: Air Gun / Water Gun, Seismics: Boomer, Seismics: Sparker, Sonar: Sidescan, Sonar: Single Beam
Scientific Purpose/Goals: Primary objectives were to look for geophysical evidence for the continuation of fracture zones from the Mesozoic sea-floor spreading anomalies into the continental margin, investigate the source of lineated magnetic anomalies in the Jurassic Quiet Zone, and obtain additional seismic data on the continental rise and slope.
Start Date: 1976-08-28
Start Port/Location: Woods Hole, MA
End Date: 1976-09-07
End Port/Location: Woods Hole, MA
Equipment Used: Gravity meter (wh), Seismic Engineering streamer, Air gun, Western Geophysical Integrated Navigation System, Echosounder, Klein 400 sidescan sonar
Information to be Derived: Morphology;
Summary of Activity and Data Gathered: FAY departed Woods Hole the afternoon of August 28, delayed 2.5 days awaiting a new crew. We steamed around the west end of Martha's Vineyard and deployed the airgun, magnetometer and minisparker at a point south of the channel between Martha's Vineyard and Nantucket. Most tracks were run perpendicular to the continental margin for better coverage of the continental slope/rise area. At the end of Line 21-4, we pullled in the airgun and magnetometer and steamed along the edge of the continental shelf (Line 21-5) to the mouth of Wilmington Canyon. Dave Twichell conducted a 1-day sidescan sonar survey of the sand waves at the mouth of the canyon. The USGS ORE sidescan system worked remarkably well from the beginning. Unfortunately LORAN-C navigation was extremely bad and final navigation was based on bridge LORAN-A. After departing Wilmington Canyon, we headed into deep water for one final traverse parallel to the continental margin. At this point USGS-Woods Hole contacted us to conduct a sidescan survey on the edge of Georges Bank where the drill ship GLOMAR CONCEPTION had lost the on-floor drill assembly. The water depth was too deep for the sidescan cable and could get only 50 fathoms from the bottom; we could see nothing. It was very difficult to survey at slow speeds because of fast currents. We returned to Woods Hole with only the minisparker deployed and arrived about noon, Sep. 7, 1976. Gravity: 2885 km; Airgun: 2150 km; Magnetics: 2150 km; Minisparker: 2750 km; 3.5 kHz: 140 km; Sidescan sonar: 140 km.
Staff: Sandra Conley, David Egelson, Frank W. Jennings, Kim D. Klitgord, C. Wesley Lombard
Notes: Original Center People field contained: Kim Klitgord - Ch. Sci., Frank Jennings - seismic engineer, Gerard McCarthy - mech. tech., David Kinney - mech. tech., Wes Lombard - mech. tech., David Egelson - nav. watch, Claire Reimers - nav. watch, Lin Morse - seismic watch, Chris Schoen - seismic watch, Sandra Conley - seismic watch, Nicholas Lefteriou - seisimic watch.
Mid-Atlantic Continental Margin, North Atlantic Continental Margin, United States, North America, North Atlantic;
Chaytor, J.D., ten Brink, Uri S., Solow, Andrew R., and Andrews, Brian D., 2009, Size distribution of submarine landslides along the U.S. Atlantic margin: Marine Geology, v. 264 no. 1-2, doi: 10.1016/j.margeo.2008.08.007.
Geist, E.L., Lynett, Patrick J., and Chaytor, Jason D., 2009, Hydrodynamic modeling of tsunamis from the Currituck landslide: Marine Geology, v. 264 no. 1-2, doi: 10.1016/j.margeo.2008.09.005.
Klitgord, K.D., 1979, Availability of single channel seismic refraction profiles collected over U.S. Atlantic Continental Slope and Rise north of Cape Hatteras - USGS Cruises FAY 20 and FAY 21 - August/September, 1976: 4, download PDF.
Paskevich, V.F., and Soderberg, Nancy K., 1997, Navigation and geophysical data collected onboard the R/V FAY from 1975-1976: URL: http://pubs.usgs.gov/of/of97-512/.
ten Brink, U.S., Barkan, R., Andrews, B.D., and Chaytor, J.D., 2009, Size distributions and failure initiation of submarine and subaerial landslides: Earth and Planetary Science Letters, v. 287 no. 1-2, doi: 10.1016/j.epsl.2009.07.031.
Twichell, D.C., Chaytor, Jason D., ten Brink, Uri S., and Buczkowski, Brian, 2009, Morphology of late Quaternary submarine landslides along the U.S. Atlantic continental margin: Marine Geology, v. 264 no. 1-2, doi: 10.1016/j.margeo.2009.01.009.