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RRS Charles Darwin CD55
Cruise summary report
Cruise Info. | |
Ship name (ship code) | RRS Charles Darwin (74AB) |
Cruise identifier | CD55 |
Cruise period | 1991-01-06 — 1991-02-05 |
Status | Completed |
Port of departure | Dakar, Senegal |
Port of return | Dakar, Senegal |
Purpose | Research |
Objectives | The principal objective of the cruise was the study of the deep crustal structure across the continental-ocean transition off Ghana where the major equatorial Romanche Fracture Zone shapes the continental slope. |
Chief scientist | Robert B Whitmarsh (Institute of Oceanographic Sciences Deacon Laboratory) |
Cruise report | (1.18 MB) |
Ocean/sea areas | |
General | Gulf of Guinea |
Specific | Continental shelf, slope and rise off Ghana |
Track charts | |
Measurements | |
Geology and geophysics | |
Single channel seismic reflection | Quantity: track kilometres = 1668 Description: Single channel, mostly 2x300 cubic ins guns |
Seismic refraction | Quantity: number of deployments = 1 Description: 00029.9W 03 13.0N 002 24.0W |
Seismic refraction | Quantity: number of deployments = 1 Description: 00034.4W 04 38.3N 000 34.1W |
Seismic refraction | Quantity: number of deployments = 1 Description: 0404.0N 00030.5W |
Seismic refraction | Quantity: track kilometres = 1080 Description: 9 lines 50' to 75' long |
Seismic refraction | Quantity: number of deployments = 1 Description: 00018.5W Ocean-bottom seismographs |
Seismic refraction | Quantity: number of deployments = 1 Description: 00042.1W also at 04 09.9N 000 06.4W |
Seismic refraction | Quantity: number of deployments = 1 Description: 00104.5W 04 30.6N 000 25.3W |
Seismic refraction | Quantity: number of deployments = 1 Description: 00010.0W 04 34.3N 000 29.5W |
Seismic refraction | Quantity: number of deployments = 1 Description: 0431.6N 00002.0E |
Seismic refraction | Quantity: number of deployments = 1 Description: 00059.4W 04 45.9N 000 42.0W |
Seismic refraction | Quantity: number of deployments = 1 Description: 00050.5W 05 00.6N 000 56.1W |
Seismic refraction | Quantity: number of deployments = 1 Description: 00010.0W 03 31.6N 002 30.9W |
Seismic refraction | Quantity: number of deployments = 1 Description: 00043.1W 03 12.0N 003 08.8W |
Seismic refraction | Quantity: number of deployments = 1 Description: 00009.7W 04 13.0N 002 30.2W |
Seismic refraction | Quantity: number of deployments = 1 Description: 00036.5W 04 04.1N 002 56.0W |
Seismic refraction | Quantity: number of deployments = 1 Description: 0437.5N 00003.4W |
Gravity measurements | Quantity: track kilometres = 5093 |
Magnetic measurements | Quantity: track kilometres = 1666.8 |