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Summary Information for Field Activity 1987-042-FA

Area of Operations: Gabon, Equatorial Guinea, Africa, North Atlantic, South Atlantic

Dates: October 22, 1987 to November 04, 1987

Chief scientist: Cathy Delorey

Objectives: Collect gravity, magnetics and bathymetric data in and around the waters of Equatorial Guinea and Gabon as specified by DMA requirements.

Type of Activity:

Information to be derived:

Summary: The ship departed Doula and proceeded to surops area on 22 Oct. 1987. Upon completion of lines begun on previous leg S7-87-AFR in the waters off Gabon, the ship headed northward to complete lines off Equatorial Guinea. Several lines in both survey areas were shortened on landward end due to shoals. The presence of oil rigs required further adjustments of lines in both regions. Surveying was completed on 31 Oct. 1987 followed by a three-day transit to Abidjan where the ship docked on 4 Nov. 1987. Final gravity land ties were completed in Abidjan on 5 Nov. to tie ship meter data with a known gravity station and to verify the accuracy of two previous land ties performed in the same area.

Contact: Cathy Delorey ()

InfoBank: uses the identifier S-8-87-AF. Visit this site for more information.

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Platform Info:

Publications resulting from these data

Folger, David W., McCullough, James R., Irwin, Barry J., Driscoll, George R., Delorey, Catherine M., and Polloni, Christopher F.,1990, Map showing free-air gravity anomalies off the western coast of Africa; Nigeria to Gabon: U.S. Geological Survey Miscellaneous Field Studies Map MF-2098-F, scale 1:1,500,000. (Available as a PDF version)

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