Cruise inventory

RRS John Murray JM5/70 Leg1

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM5/70 Leg1
Cruise period1970-06-01 — 1970-06-20
Port of departureBarry, United Kingdom
Port of returnStornoway, United Kingdom
ObjectivesThe objectives of the cruise were to continue investigations of the deep structure beneath the north Scottish shelf and margin and across the intervening deep channel on to the Faeroe Rise.

First two weeks: planned to make a preliminary survey of the shelf and margin to the west of the Outer Hebrides and to carry out prelimnary traverses across the main seamounts and banks between Rockall and the Faeroe Islands (observing bathymetry, gravity, magnestics, seismic profiling and using sonobuoys)

Second two weeks: original plan to carry out sono-buoy refraction surveys to determine sediment thickness beneath the Faeroe-Shetland channel and beneath shelf gravity anomalies

Third two weeks: further lines across the shelf, margin and parts of the Faeroe Rise were planned.
Chief scientistJ H Peacock (University of Durham, Department of Geological Sciences)
Cruise reportRRS John Murray JM5/70 Leg1 cruise report john_murray5_70.pdf — access key 'C' (0.43 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificContinental slope off NW Scotland
Track chartsRRS John Murray JM5/70 Leg1 cruise track — john_murray5_70trk.pdf (0.04 MB) 
Geology and geophysics 
In-situ seafloor measurement/samplingDescription: acoustic properties;airgun profiling
Single channel seismic reflection
Seismic refraction
Gravity measurements
Magnetic measurements