Summary for Field Activity Number 82037

Alternate Leg ID: OC130

Area of Operations: Lydonia Canyon, Oceanographer Canyon, Mud Patch, Lease Block 312, North Atlantic Continental Slope, United States, North America, North Atlantic

Dates: November 9, 1982 to November 16, 1982

Chief scientist: Brad Butman
   

Objectives: 1. Recover 2 subsurface moorings and 1 bottom tripod system deployed in Lydonia Canyon. This recovery completed the 2-year field measurement program in Lydonia and Oceanographer Canyons. 2. Recover 3 sediment-trap moorings deployed near Mobil Block 312. This array was designed to measure the resuspension and transport of drill muds discharged during drilling. 3. Deploy 5 subsurface moorings on the Continental Slope. This array initiates a large study of currents and sediment movement along the outer shelf, Continental Slope, and upper rise. 4. Conduct a detailed hydrographic survey around Lydonia and Oceanographer Canyons and along the Continental Slope in support of objectives 1 and 3. 5. Obtain hydrostatically damped cores in the Mud Patch, Lydonia Canyon, and around Lease Block 312 to document the vertical distribution of drill muds in surficial sediments. 6. Obtain surface grab samples around Lydonia and Oceanographer Canyons to refine surface-sediment texture map. 7. Recover 5 surface marker buoys deployed to mark instrument sites.

Type of Activity: Sampling
Mooring work
Bathymetry

Information to be derived: Samples and Chemical Analysis
Bathymetric Maps
Mooring recovery and deployment

Summary: All work for OC 130 was completed. Deployed moorings: 6 (#266, 267, 268, 269, 270, and 271). Recovered moorings: 7 (#258, 259, 260, 261, 262, 264, and 266). Recovered buoys: (A, C, E, P, R, and V). CTDs: 33; XBTs: 41; Surface salinity samples: 68; Surface nutrient samples: 32; Suspended sediment samples: 16; Oxygen samples: 12; VanVeen grab samples: 10; Hydraulically damped cores: 1; Bathymetry.

USGS Project Number: 9840-01797

Contact: Brad Butman (bbutman@usgs.gov)

InfoBank: uses the identifier O-30-82-NE. Visit this site for more information.