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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 1997-006-FA

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Other ID: 97-6

Status: Completed

Organization(s): USGS, Woods Hole Coastal and Marine Science Center

Funding Program(s):

Principal Investigator(s): David Twichell

Affiliate Investigator(s): Hans Nelson - PMG

Information Specialist(s):

Data Type(s): Seismics: Multichannel, Imagery: Photo, Imagery: Video, Location-Elevation: Navigation, Sampling: Geology, Seismics: Air Gun / Water Gun, Seismics: Boomer, Seismics: Bubble Gun, Seismics: Sparker, Seismics: Sub Bottom Profiler, Sonar: Sidescan, Sonar: Single Beam

Scientific Purpose/Goals: A turbidity current pathway on the Louisiana slope was to be mapped with SIS-7000, seismic profiles, and piston cores to understand sand deposit formation. The study area was between 26 and 27.5 deg. N and 91 and 92 deg. W in water depths ranging from 800-2,800 m.

Vehicle(s):

Start Port/Location: Galveston, TX

End Port/Location: Galveston, TX

Start Date: 1997-04-05

End Date: 1997-04-25

Equipment Used: Multichannel seismics, SIS-7000 sidescan, ISIS, Odom Digitrace 200kHz, 3.5 kHz, Mudseis, DGPS, Piston corer, Digital camera, GI Air Gun

Information to be Derived:

Summary of Activity and Data Gathered:

Staff: VeeAnn Cross, William Danforth, David Foster, Eric Haase, Barry Irwin, David Nichols, Thomas O'Brien, Michael Taylor, David Twichell

Affiliate Staff:
Hans Nelson - co-chief scientist - PMG; Scott Harrison - St. Pete; Gita Dunhill - PMCT; Jed Damuth - UTArl; Marty Bohn
Eric Q. - TAMU coring; John Brand
Eddy Lee
Chris Spaquaolo - TAMU students

Notes: 4/5-15 Sidescan and seismics: Twichell - Ch Sci. 4/15-25. Piston coring: Twichell and Nelson - co-Ch Sci. A web page is in the process of being developed for this project, and we will update when it is on line.
Project = Tectonics and sedimentary processes of the salt, Tectonics and sedimentary processes of the salt
Information from Foghorn: DGPS and P-code GPS navigation, SIS7000 w/chirp sub-bottom, ISIS logger, acoustic ranging system, XSONAR;digital bathymetry, 3.5 kHz;GI gun, Mudseis; DGPS and P-code GPS for ship;
4/5-15 Sidescan and seismics: Twichell - Ch Sci. 4/15-25. Piston coring: Twichell and Nelson - co-Ch Sci

Location:

offshore Louisiana, United States, Gulf of Mexico, North America, North Atlantic;

Boundaries
North: 27.48769817 South: 25.97560459 West: -92.97512741 East: -91.4997586

Platform(s):

photo of Gyre
Gyre

Publications

Nealon, J.W., Dillon, W.P., and Twichell, D.C., 1999, Seismic reflection results from the GYRE 1997 cruise of the Bryant Canyon on the Louisiana Gulf Coast: U.S. Geological Survey Open-File Report 99-449, 3 CD-ROMs, URL: https://doi.org/10.3133/ofr99449.

Twichell, D.C. Cross, V.A., Paskevich, V.F., Hutchinson, D.R., Winters, W.J., and Hart, P.E., 2006, GIS of selected geophysical and core data in the northern Gulf of Mexico continental slope collected by the U.S. Geological Survey: U.S. Geological Survey Open-File Report 2005-1071, DVD-ROM, also available from https://doi.org/10.3133/ofr20051071.

Portals/Viewers

FAN 1997-006-FA has data viewable in the GeoMappApp/Virtual Ocean applications. To view this data in these applications go to http://www.geomapapp.org/ and http://www.virtualocean.org/. See the instructions for locating USGS data in these applications. You can also view the imagery created from the SEGY data at https://cmgds.marine.usgs.gov/images.php?cruise=1997-006-FA.

Documents associated with this activity

Title Survey Equipment Description
Navigation log DGPS Cruise navigator's notes, Leg 1. Includes antenna and equipment configuration, time of start and end of lines and comments.
Navigation log DGPS Navigation printout for Legs 1 and 2 containing time, latitude, longitude, speed, direction, and sample event mark.
Geophysics log (document not focused on specific equipment) Seismic/geophysics log for Legs 1 and 2. Leg 1 is water gun, Leg 2 is 3.5 kHz and piston core locations.
Cruise log (document not focused on specific equipment) Chief Scientist's seismic/geophysics log for Leg 1 with system, julian day, time, line, storage device, and comments.. Includes systems documented in the log.
Core log Piston corer Chief Scientist's core log with position information, equipment, core recovery and section notes. From Leg 2.
Core description Piston corer Chief Scientist's visual core description log for Leg 2.

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
Multichannel seismics --- Multichannel
Air gun data
SIS-7000 sidescan --- Sidescan
ISIS --- Sidescan
Odom Digitrace 200kHz --- Single Beam
3.5 kHz --- Sub Bottom Profiler
1997-006-FA-SE-001 ( Collection of paper record displays of seismic data( 3.5K) for lines )
Mudseis --- Air Gun / Water Gun
Boomer
Bubble Gun
Sparker
DGPS --- Navigation
1997-006-FA-LN-001 (Floppy disk(s) containing NAV DGPS, NAV DGPS, NAV DGPS, NAV DGPS, NAV DGPS, NAV DGPS, NAV DGPS, NAV DGPS PLGR BACKUP, )
1997-006-FA-NL-001-02 (Navigation printout for Legs 1 and 2 containing time, latitude, longitude, speed, direction, and sample event mark.)
Water gun navigation
Piston corer --- Geology
1997-006-FA-NL-001-08 (Chief Scientist's visual core description log for Leg 2. )
1997-006-FA-SC-001 (CORE samples)
Digital camera --- Photo
GI Air Gun --- Air Gun / Water Gun

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