RRS John Murray JM8/71
Cruise summary report
|Ship name (ship code)||RRS John Murray (74MJ)|
|Cruise period||1971-06-23 — 1971-07-14|
|Port of departure||Fairlie, United Kingdom|
|Port of return||Oban, United Kingdom|
|Objectives||1. To investigate, in detail, sedimentary basins and associated major fractures at the southern margin of the Minch, i.e. between northern Skye and the Outer Hebrides: seismic refraction and reflection lines to be shot over the basis to determine the nature and extent of their sedimentary infills with sparker and magnetometer profiles supplying information on near-surface geology and on the margins of the basins; sea-bed gravimeter observations to be made, primarily in the area of Loch Snizort, to clarify the known, but ill-defined, gravity anomaly occurring over one of the basins.
2. To further our investigation of the Malin centre, begun on cruise of M.V. Surveyor in 1970, by sea-bed gravimetry.
3. To take some sea-bed gravity readings in Lough Foyle for Professor Murphy of the Institute of Advanced Studies, Dublin.
|Chief scientist||Adam C McLean (University of Glasgow Department of Geology)|
|Cruise report||(0.24 MB)|
|General||North East Atlantic Ocean (limit 40W)|
|Geology and geophysics|
|Multi-beam echosounding||Quantity: track kilometres = 1389|
|Single channel seismic reflection||Quantity: track kilometres = 1389|
|Seismic refraction||Quantity: number of track lines = 4|
Description: Each approximately 15 kilometres
|Magnetic measurements||Quantity: track kilometres = 1389|