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Summary for Field Activity Number 1982-034-FA

Alternate Leg ID: GYRE 82-11; 11-G-82; 82-G-11

Area of Operations: Blake Plateau, United States, North America, North Atlantic

Dates: September 18, 1982 to September 28, 1982

Objectives: Test new techniques to determine thickness, distribution and quality of mineral deposits on the Blake Plateau with special reference to manganese nodules and manganese-phosphate pavements; obtain ANGUS/ARGUS wide-angle bottom photos for visual ground truthing; collect pavement core samples; determine nodule concentration via MFES; and determine mineral thickness via seismic reflection/refraction.

Type of Activity: Sampling
Reflection/refraction profiling

Information to be derived: Samples and chemical analysis

Summary: Camera lowerings - Approx. 45 hrs. and 18,000 photos; High-resolution acoustic profiling: 1000 km; MFES profiling: 100 km; Bottom reflection lowerings: 3; Bottom refraction experiment: 1; Dredges: 18 (300 kg rocks recovered); Cores: 11.

USGS Project Number: 9840-02005

Contact: Frank Manheim (

Map for Area of Operations :

Map of field activity boundary.

Platform Info:
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