USGS Coastal and Marine Geology Program

Coastal & Marine Geology Program

Field Activity Details for field activity 1999-002-FA

Other ID: none

Status: Completed

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

Funding Program(s):

Location: Gulf of Mexico, United States, North America, North Atlantic;

Principal Investigator(s): David Twichell

Affiliate Investigator(s): Alan Cooper, USGS, Menlo Park

Information Specialist(s):

Data Type(s): Location-Elevation: Navigation, Location-Elevation: Transects, Seismics: Boomer, Seismics: Multichannel, Sonar: Sidescan

Scientific Purpose/Goals: Collection of regional high-resolution multichannel seismic data and Huntec seismic data as well as two detailed sidescan surveys to understand the distribution of gas hydrates on the upper continental slope in the Gulf of Mexico and their effect on sea floor processes.

Vehicle(s):

Start Date: 1999-04-09

Start Port/Location: Galveston, TX

End Date: 1999-04-22

End Port/Location: Galveston, TX

Equipment Used: DGPS, SIS1000 Sidescan sonar, Benthos 7000 , Multichannel seismics, Boomer, Single channel hydrophone

Information to be Derived:

Summary of Activity and Data Gathered: Not all the gear was run all the time, so the amounts of individual data types (in km) are as listed: High-resolution MCS data - 1400 km; Huntec boomer data - 900 km; SIS-1000 sidescan and Chirp sub-bottom data - 500 km.

Staff: Chris Anton, William Danforth, David Foster, Barry Irwin, David Nichols, Thomas O'Brien

Affiliate Staff:
USGS
Menlo Park - Jeff Brody
watchstander; Pat Hart
seismic processor; Larry Kooker
electronics tech; Walt Olson
mechanical tech; Hal Williams
mechanical tech. Graham Standen - Geoforce
Inc.

Notes: Original Center People field contained: Chris Anton, watchstander; Bill Danforth, sidescan processing; Dave Foster, seismic processing; Barry Irwin, nav. tech.; Dave Nichols, electronics tech; Tom O'Brien, electronics tech.
Project = Gulf of Mexico Tectonics and Hydrates Projects, Gulf of Mexico Tectonics and Hydrates Projects

Location Map:

Platform(s):

photo of Gyre
Gyre

Publications

(Single Channel seismic) Foster, D. S., Twichell, D. C., Danforth, W. W., Irwin, B. J., Nichols, D. R., and O'Brien, T. F.,1999, Archive of SIS-1000 CHIRP subbottom data collected during USGS Cruise GYRE 99002, Gulf of Mexico, 9-22 April, 1999: U.S. Geological Survey Open-File Report 99-586, 3 CD-ROMs

(Bathymetry) Twichell, D.C., Cross, V.A., Paskevich, V.F., Hutchinson, D.R., Winters, W.J., and Hart, P.E., 2007, 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

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
DGPS --- Navigation
SIS1000 Sidescan sonar --- Boomer
Sidescan
Benthos 7000 --- Navigation
Transects
Multichannel seismics --- Multichannel
1999-002-FA-SE-001 ( Raw SEGY data)
Boomer --- Boomer
Single channel hydrophone --- Air Gun / Water Gun
Boomer
Bubble Gun
Sparker
Sub Bottom Profiler