RRS Shackleton S8/77,Leg 2
Cruise summary report
Cruise Info. | |
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Ship name (ship code) | RRS Shackleton (74SF) |
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Cruise identifier | S8/77,Leg 2 |
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Cruise period | 1977-07-04 — 1977-07-26 |
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Status | Completed |
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Port of departure | Aberdeen, United Kingdom |
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Port of return | Reykjavík, Iceland |
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Purpose | Research |
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Objectives | 1) Observation of the micro-eathquakes on the Reykjanes Ridge with an array of Ocean Bottom Seismographs near 59½° N.
2) Determination of the structure of the ridge by means of three long range seismic refraction profiles positioned along the 0,4 and 9 My isochrons.
3) Projectile experiment. Ten projectiles were dropped to the sea bed to see whether their impacts could be detected by the OBS.
4) Temperature measurement. An IOS temperature- telemetering pinger was towed near the seafloor to look for temperature anomalies in the water which might be associated with geothermal springs |
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Chief scientist | Tim J G Francis (Institute of Oceanographic Sciences Wormley Laboratory) |
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Cruise report | (0.47 MB) |
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Ocean/sea areas | |
General | North East Atlantic Ocean (limit 40W) |
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Track charts | |
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Measurements | |
Physical oceanography | |
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Subsurface temperature and salinity measurements | |
Geology and geophysics | |
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Single-beam echosounding | Quantity: 200 |
Single channel seismic reflection | Quantity: 100 |
Seismic refraction | Quantity: 180 |
Gravity measurements | Quantity: track kilometres = 370.4 |
Magnetic measurements | Quantity: track kilometres = 370.4 |