RRS Discovery D154_4
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Discovery (74E3) |
| Cruise identifier | D154_4 |
| Cruise period | 1985-03-10 — 1985-04-11 |
| Status | Completed |
| Port of departure | Grytviken, South Georgia and the South Sandwich Islands |
| Port of return | Montevideo, Uruguay |
| Purpose | Research |
| Objectives | The two main aims of the cruise were to study ridge crest-trench collisions in the Scotia and Bellingshausen seas and to investigate the controls on Weddell sea sedimentation. The cruise included a study of the three youngest collision zones off the Antarctic Peninsula and a reconnaissance of the youngest collision zone in the contrasting intra-oceanic environment directly south off the South Sandwich arc.
This leg focussed on a reconnaissance geophysical survey of an intra-oceanic crest-trench collision south of the South Sandwich Islands, with further heatflow measurements, dredges and coring. The return course form the work area to Montevideo included geophysical surveying of little-known areas of the Scotia Sea up as far as 48N. XBT drops for IOS continued throughout this leg of the cruise. |
| Chief scientist | Peter F Barker (University of Birmingham Department of Geological Sciences) |
| Cruise report |  (3.42 MB) |
| Ocean/sea areas | |
| General | South West Atlantic Ocean (limit 20W) |
| Specific | South Orkney Block Jane Basin Scotia Sea |
| Track charts | (0.05 MB) |
| Measurements | |
| Biology and fisheries | |
| Sediment traps | Description: Sediment and bottom samples were collected during the cruise. No. of samples not noted. |
| Gear research | Description: A new digital multichannel seismic acquisition system was trialed during the cruise. No of trials not noted. |
| Geology and geophysics | |
| Core - soft bottom | Description: A number of cores were collected during the cruise. No. of cores not noted. |
| In-situ seafloor measurement/sampling | Description: Sediment and bottom samples were collected during the cruise. No. of samples not noted. |
