RRS John Murray JM1/68 Leg 2
Cruise summary report
Cruise Info. | |
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Ship name (ship code) | RRS John Murray (74MJ) |
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Cruise identifier | JM1/68 Leg 2 |
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Cruise period | 1968-01-18 — 1968-01-29 |
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Status | Completed |
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Port of departure | Bilbao, Spain |
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Port of return | Las Palmas, Spain |
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Purpose | Research |
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Objectives | Aims
1. Reconnaissance - geochemical/geological investigations of the NW African Shelf
2. refraction, seismic and other geophysical studies in the Canaries. |
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Chief scientist | J S Tooms (Imperial College London Department of Geology) |
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Cruise report | (12.08 MB) |
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Ocean/sea areas | |
General | North East Atlantic Ocean (limit 40W) |
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Specific | North West Africa Shelf |
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Measurements | |
Biology and fisheries | |
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Gear research | Description: tests of presssure casing of the UKAERE scintollometer |
Geology and geophysics | |
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Dredge | Quantity: number of samples = 29 Description: 29 sediment samples (13 contained rock) |
Grab | Quantity: number of samples = 29 Description: 29 sediment samples (13 contained rock) |
Core - rock | Quantity: number of samples = 29 Description: 29 sediment samples (13 contained rock) |
Core - soft bottom | Quantity: number of samples = 29 Description: 29 sediment samples (13 contained rock) |
Bottom photography | Quantity: number of stations = 6 Description: camera on the Casablanca traverse |
Single-beam echosounding | Description: echo-sounder watches kept |
Seismic refraction | Description: each traverse had a continuous seismic profile taken before sampling |
Magnetic measurements | Quantity: number of observations = 6 Description: magnetometer record between each traverse |
Other geological/geophysical measurements | Quantity: number of surveys = 7 Description: traverses across shelf, 3 north of Canaries and 4 south - all crossed areas of different sedimentation conditions |