USGS - science for a changing world

USGS Coastal and Marine Geology Program

Field Activity Details for field activity 1991-027-FA

Other ID: CH-15-91

Status: Completed

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

Funding Program(s):

Principal Investigator(s): William Dillon

Affiliate Investigator(s): Charles Paull - UNC; Richard von Herzen - WHOI

Information Specialist(s):

Data Type(s): Environmental Data: Conductivity, Environmental Data: Temperature, Location-Elevation: Navigation, Seismics: Air Gun / Water Gun

Scientific Purpose/Goals: Study of geological/geochemical/physical controls on gas hydrate distribution in sediments of the continental rise off North Carolina using seismics, heat flow measurements and chemistry of core samples.


Start Port/Location: Beaufort, NC

End Port/Location: Beaufort, NC

Start Date: 1991-08-19

End Date: 1991-08-30

Equipment Used: GPS (wh), Corer - slow, Air gun, Single channel hydrophone, Heat flow, YSI multiparameter sonde

Information to be Derived: Morphology;

Summary of Activity and Data Gathered: Seismic profiles: 12 (626 km); Piston cores: 12 (nearly 40 ft. long); Heat flow measurements: 3 transects (32 sites).

Staff: William Dillon, Kristen Fehlhaber, Thomas O'Brien

Affiliate Staff:
Charles Paull - co-Ch. Sci.
UNC; William Ussler - UNC; Walter Borowski - UNC; Collin Mellor - UNC; Sutton Edlick - UNC; Richard von Herzen - co-Ch. Sci.
WHOI; Alain Bonneville - WHOI
Paul Fucile - WHOI



Blake Ridge, Cape Fear, North Carolina, United States, North America, North Atlantic;

North: 33.17 South: 32.71 West: -76.22 East: -74.98


photo of Cape Hatteras
Cape Hatteras


Anton, C., Dillon, W.P., and Lee, M., 1999, Anomalous, nearly horizontal, seismic reflection at the Blake Ridge--Evidence for a gas trap crosses the base of gas hydrate stability [abs.]: Eos, Transactions, American Geophysical Union, Spring Meeting, v. 80 no. 17-supplement.


Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
Corer - slow --- Geology
Heat flow --- Temperature
YSI multiparameter sonde --- Conductivity
Dissolved Oxygen
1991-027-FA-OM-001 ( SAIL Information - (text file) Data collected from a number of meterological, oceanographic and maritime devices aboard the RV CAPE HATTERAS. The scan rate for the system is user-selectable, usually 5 minutes.)
GPS (wh) --- Navigation
1991-027-FA-LN-001 ( Navigation trackline plot for field activity 91027)
1991-027-FA-LN-003 ( CD ROM disk of SEG-Y 1,4,11,12, NAV,LOGS, )
1991-027-FA-LN-002-03 ( Cruise navigation)
1991-027-FA-LN-002-01 ( Locations for piston cores and heat flow stations.)
1991-027-FA-LN-002-02 ( Seismic line end locations.)
Air gun --- Air Gun / Water Gun
Single channel hydrophone --- Air Gun / Water Gun
Bubble Gun
Sub Bottom Profiler
1991-027-FA-SE-001 ( Collection of paper record displays of seismic data( AIR) for lines )
1991-027-FA-SE-003 ( Digital tape(s) of AIRGUN LINE 1, AIRGUN LINE 1-5, AIRGUN LINE TEST,6-10, AIRGUN LINE 11-12, )
1991-027-FA-SE-002 ( microfilm of )
1991-027-FA-SE-004 ( CD ROM disk of SEG-Y 1,4,11,12, NAV,LOGS, )

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior | U.S. Geological Survey
Questions or Comments? Contact CMGDS Team