Cruise summary report
Cruise Info. | |
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Ship name (ship code) | RRS John Murray (74MJ) |
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Cruise identifier | JM8/71 |
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Cruise period | 1971-06-23 — 1971-07-14 |
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Status | Completed |
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Port of departure | Fairlie, United Kingdom |
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Port of return | Oban, United Kingdom |
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Purpose | Research |
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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. |
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Chief scientist | Adam C McLean (University of Glasgow Department of Geology) |
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Cruise report | (0.24 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 | |
Geology and geophysics | |
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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 |