Other ID: UGEO Leg 6; CORPUS 21
Status: Completed
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Funding Program(s):
Principal Investigator(s): Martin F. Kane
Affiliate Investigator(s):
Information Specialist(s):
Data Type(s): Electro-Magnetic: Gravity, Electro-Magnetic: Magnetics, Location-Elevation: Navigation, Seismics: Sonobuoy, Seismics: Sparker, Seismics: Sub Bottom Profiler
Scientific Purpose/Goals: Objectives of this cruise were: (a) to investigate the acoustic reflection characteristics of the mid-Atlantic ridge and other oceanic structures such as the Vema fracture zone and the Sierra Leone rise; (b) to correlate data from JOIDES drill holes with sub-bottom acoustic reflection profiles in oceanic areas; and (c) to extend our knowledge of sediment distribution and thickness in the deep ocean.
Vehicle(s):
Start Port/Location: Monrovia, Liberia
End Port/Location: Charlotte Amalie, St. Thomas, U.S. Virgin Islands
Start Date: 1971-11-24
End Date: 1971-12-10
Equipment Used: 3.5 kHz, Sparker , LaCoste-Romberg gravimeter G-179, Varian V-75 magnetometer, Seismic refraction, ITT 4007 satellite navigation, Decca radar system, Single channel hydrophone
Information to be Derived: Suspended sediment concentrations; Bathymetric maps; Magnetic intensity and gravity; Sub-bottom acoustic reflection profiles;
Summary of Activity and Data Gathered: The major result so far is that various geophysical data including continuous gravity, magnetics, and seismic reflection profiles and 18 seismic refraction and wide angle reflection (sonobuoy) profiles have been successfully recorded over a number of features. Gravity and magnetics records will require computer processing to be usable. Survey lines: 1, 2, 3, 4, 5, 6, 7, and 7A.
Staff: Frank W. Jennings, Martin F. Kane, Charles J. O'Hara, James M. Robb
Affiliate Staff:
USGS-Menlo Park: Harry Hill (Electronic Technician)
James Nicholson (Electronic Technician)
William Todd (Physical Science Technician); USGS-Denver: Gerald Evenden (Geophysicist); United Geophysical Corp. (Pasadena
CA): Trevor Hill (navigation tech.)
Notes: Original Center People field contained: Martin F. Kane (Chief Sci.), Jim Robb (Geologist), Chuck O'Hara (Geologist), Frank W. Jennings (Electronic Technician).
Project = International Decade of Ocean Exploration (IDOE), International Decade of Ocean Exploration (IDOE)
Location:
transatlantic westward crossing, Liberia, Africa, Sierra Leone Rise, Vema Fracture Zone, mid-Atlantic Ridge, JOIDES 13,26,27, Charlotte Amalie, St. Thomas, U.S. Virgin Islands, Lesser Antilles, North Atlantic;
Boundaries | |||
---|---|---|---|
North: 18.27573285 | South: 5.05203079 | West: -63.86832447 | East: -10.22518121 |
Platform(s):
United Geo I |
Kane, M.F., 1972, Acoustic reflection profiles, Transatlantic crossing west, International Decade of Ocean Exploration, Leg 6, 1971 cruise, UNITEDGEO I: , USGS-GD-72-007, PB-209-872. 21 p. https://pubs.er.usgs.gov/publication/70121224.
Title | Survey Equipment | Description |
---|---|---|
Cruise report | (document not focused on specific equipment) | Chief Scientist's cruise report of data collection and equipment notes, ship movement, personnel, data tabulations, etc. |
Survey Equipment | Survey Info | Data Type(s) | Data Collected |
---|---|---|---|
3.5 kHz | --- | Sub Bottom Profiler | NGDC MGD77 data 1971-006-FA-BA-001 (Bathymetry data in InfoBank) |
Sparker | --- | Sparker | |
LaCoste-Romberg gravimeter G-179 | --- | Gravity | 1971-006-FA-GP-002 (Gravity in InfoBank) NGDC MGD77 data |
Varian V-75 magnetometer | --- | Magnetics | NGDC MGD77 data 1971-006-FA-GP-001 (Magnetics in InfoBank) |
Seismic refraction | --- | Sonobuoy | |
ITT 4007 satellite navigation | --- | Navigation | 1971-006-FA-LN-002 (Navigation data in InfoBank) 1971-006-FA-LN-001-01 (Trackline chart with line numbers and times.) |
Decca radar system | --- | Navigation | |
Single channel hydrophone | --- | Air Gun / Water Gun Boomer Bubble Gun Sparker Sub Bottom Profiler | 1971-006-FA-SE-002 (microfilm of ) 1971-006-FA-SE-001 ( Collection of paper record displays of seismic data( SONO) for lines ) |