RRS Shackleton S3/76, Leg 2
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Shackleton (74SF) |
| Cruise identifier | S3/76, Leg 2 |
| Cruise period | 1976-06-18 — 1976-07-11 |
| Status | Completed |
| Port of departure | Ponta Delgada, Portugal |
| Port of return | Barry, United Kingdom |
| Purpose | Research |
| Objectives | The objectives of I.O.S. (W) were two fold. Firstly, to shoot three long refraction profiles west of the Mid- Atlantic Ridge north of the Azores, and secondly to carry out the gravity survey of the Kurchatov Fracture Zone (fig. 2) The refraction lines were intended to complement earlier work carried out in 1974 and 1975, which had as its aim the detection of structures within the upper mantle and the lateral variation of such structures normal to the ridge axis. The gravity survey was aimed at detecting the contrast of lithospheric thickness across the fracture zone and the degree of isostatic compensation adjacent to the fracture zone. |
| Chief scientist | Drummond Hoyle Matthews (University of Cambridge Department of Earth Sciences), Robert B Whitmarsh (Institute of Oceanographic Sciences Wormley Laboratory) |
| Cruise report |  (0.51 MB) |
| Ocean/sea areas | |
| General | North East Atlantic Ocean (limit 40W) |
| Track charts |  |
| Measurements | |
| Geology and geophysics | |
| Single-beam echosounding | Quantity: track kilometres = 2532 Description: precision echo-sounder |
| Single channel seismic reflection | Quantity: 387 |
| Seismic refraction | Quantity: 374 |
| Gravity measurements | Quantity: track kilometres = 1085.272 |
