Alternate Leg: ID (130) Area of Operations : Lydonia Canyon, Mud Patch, Oceanographer Canyon, 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 deploed near Mobil Block 312. This array was designed to measure the resuspension and transport of drill muds discharges 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 OC130 was completed. Deployed moorings:6 (#266,267,268,269,270,271); Recovered moorings:6 (#258,259,260,261,262,264,266); Recovered buoys: (A,C,E,P,R,V) CTDs: 33; XBTs:41; Surface salinity:68; Surface nutrients:32; Suspended sediments:16; Oxygen:12; VanVeen samples:10; Hydraulically damped cores:1; USGS Project Number:
Contact: Brad Butman (bbutman@usgs.gov)
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Map for Area of Operations :
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U.S. Department of the Interior |
U.S. Geological Survey
