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Summary Information for Field Activity 1990-026-FA

Area of Operations: Continental Slope off New Jersey, Deep Water Dump Site DWDS 106, southern flank of Georges Bank, United States, North America, North Atlantic

Dates: August 02, 1990 to August 07, 1990

Chief scientist: Mike Bothner

   J. Frederick Grassle - Rutgers U.

Objectives: Recover two subsurface moorings from the dump site which were deployed in September 1989. Collect sediment samples for studies of benthic infauna, microbiology, heavy metal and organic geochemistry. Overall objective of the sampling is to extend our study (initial survey on ATLANTIS cruise 122) of the sea floor to determine where particles from sewage sludge are being deposited as a result of discharge in the dump site (2,250-2,750 m water depth). Samples were also taken in control sites to the northeast of Hudson Canyon at about 2,500 m water depth. Reoccupied two sites on the southern flank of Georges Bank for coring and grab sampling.

Type of Activity: Sampling; Mooring work; Seismic profiling;

Information to be derived: Time series data; Samples and chemical analysis; Grain size analysis; Suspended sediment concentrations;

Summary: Moorings recovered: 2 (#336 and 337, deployed FA 89027 ATL2 AII222 Sep. 15-26, 1989). Box cores: 15; Van Veen grab samples: 6; Hydraulically-damped gravity cores: 6; Piston cores: 3.

Contact: Mike Bothner (mbothner@usgs.gov)

InfoBank: uses the identifier O-22-90-NJ. Visit this site for more information.

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