RRS Shackleton S8/77,Leg 2
Cruise summary report
|Ship name (ship code)||RRS Shackleton (74SF)|
|Cruise identifier||S8/77,Leg 2|
|Cruise period||1977-07-04 — 1977-07-26|
|Port of departure||Aberdeen, United Kingdom|
|Port of return||Reykjavík, Iceland|
|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
|Chief scientist||Tim J G Francis (Institute of Oceanographic Sciences Wormley Laboratory)|
|Cruise report||(0.47 MB)|
|General||North East Atlantic Ocean (limit 40W)|
|Subsurface temperature and salinity measurements|
|Geology and geophysics|
|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|