RRS Discovery D75
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Discovery (74E3) |
| Cruise identifier | D75 |
| Cruise period | 1975-10-22 — 1975-11-08 |
| Status | Completed |
| Port of departure | Barry, United Kingdom |
| Port of return | Santa Cruz de Tenerife, Spain |
| Purpose | Research |
| Objectives | The principal objectives of the cruise were as follows:
1) To obtain a series of bottom sediment and pore water samples, using a new box corer and a new in-situ pore water sampler, from a variety of environments off the north west African margin 2) To obtain a series of large volume water samples, at all depths, for investigations of the organic and inorganic composition of suspended particles and for studies of the concentration patterns of selected dissolved trace metals 3) To obtain samples of the sea-surface organic films 4) To carry out an extensive benthic sampling programme, including near-bottom sampling using RMT equipment and a semi-balloon trawl. |
| Chief scientist | Stephen E Calvert (Institute of Oceanographic Sciences Wormley Laboratory) |
| Project | Geochemical and biological sampling off North West Africa |
| Cruise report |  (5.68 MB) |
| Ocean/sea areas | |
| General | North East Atlantic Ocean (limit 40W) |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: track kilometres = 3241 |
| Water bottle stations | Quantity: number of stations = 3 |
| Chemical oceanography | |
| Oxygen | Quantity: 3 |
| Silicate | Quantity: 3 |
| Trace elements | Quantity: 3 |
| Biology and fisheries | |
| Phytoplankton | Quantity: 1 |
| Zoobenthos | Quantity: 3 |
| Birds | Description: Observations made throughout the cruise, with each observation lasting 10 minutes. |
| Meteorology | |
| Routine standard measurements | |
| Geology and geophysics | |
| Core - soft bottom | Quantity: number of cores = 3 Description: chemical analysis of sediments |
| Multi-beam echosounding | Quantity: track kilometres = 3241 |
| Magnetic measurements | Quantity: track kilometres = 1222.32 |
