RRS Discovery D109
Cruise summary report
|Ship name (ship code)||RRS Discovery (74E3)|
|Cruise period||1980-03-10 — 1980-04-19|
|Port of departure||San Juan, Puerto Rico|
|Port of return||Balboa, Panama|
|Objectives||1. The main intention was to determine the nature of the deformation that has affected the sediments along the boundary zone between Atlantic and Caribbean sea floors and to seek its origins. Details of the relief, and interpretation of its structural trends, are largely lacking, despite attention by British, French and American workers.
The approach was make the first broad regional survey of the structural trends in plan view with GLORIA long range side-scan sonar and high resolution echo-sounder, looking especially for folds, faults and slumps. In the second part of the cruise crucial profiles were explored in association with a small Durham University geophysics team, using a multi-channel seismic profiling system, to obtain the structure of the underlying sediments.
2. Sonar platform - speed trials
3. Lucas hydraulic pump - noise tests
4. Pollution monitoring.
|Chief scientist||A H B Stride (Institute of Oceanographic Sciences Wormley Laboratory)|
|Cruise report||(0.41 MB)|
|General||North West Atlantic Ocean (limit 40W)|
|Specific||Atlantic/ Caribbean Boundary|
|Geology and geophysics|
|Single-beam echosounding||Quantity: track kilometres = 12964|
|Long/short range side scan sonar||Quantity: track kilometres = 12964|
|Single channel seismic reflection||Quantity: track kilometres = 4630|