RRS John Murray JM8/71
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS John Murray (74MJ) |
| Cruise identifier | JM8/71 |
| Cruise period | 1971-06-23 — 1971-07-14 |
| Status | Completed |
| Port of departure | Fairlie, United Kingdom |
| Port of return | Oban, United Kingdom |
| Purpose | Research |
| 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) |
| Ocean/sea areas | |
| General | North East Atlantic Ocean (limit 40W) |
| Track charts |  |
| Measurements | |
| 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 |
