RRS Discovery D154_2
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Discovery (74E3) |
| Cruise identifier | D154_2 |
| Cruise period | 1985-01-01 — 1985-02-01 |
| Status | Completed |
| Port of departure | Stanley, Falkland Islands (Malvinas) |
| Port of return | Punta Arenas, Chile |
| 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 he 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.
The cruise included the following activities: (1) Geophysical (gravity, magnetics and seismics) surveying in the Bransfield Strait to South Orkney region, including shooting lines in conjunction with HMS Endurance. (2) Measurement of sea-floor heatflow by deployment of in-situ probe, including piston-coring to determine site suitability. (3) Sample collection by rock dredge. (4) Routine XBT drops for IOS. |
| 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 | Bransfield Strait, Scotia Sea |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Bathythermograph | Quantity: number of profiles = 160 Description: Gibralta-P. Stanley, S. Ocean, to Montevideo:2 or 4 per day |
| Meteorology | |
| Routine standard measurements | |
| Geology and geophysics | |
| Dredge | Quantity: number of deployments = 19 |
| Core - soft bottom | Quantity: number of cores = 28 |
| Multi-beam echosounding | Quantity: track kilometres = 21483 Description: +1000nm in Eq. Atlantic on passage |
| Long/short range side scan sonar | Quantity: track kilometres = 5556 |
| Single channel seismic reflection | Quantity: track kilometres = 3704 |
| Gravity measurements | Quantity: track kilometres = 21483 Description: +1000nm in Eq. Atlantic on passage |
| Magnetic measurements | Quantity: track kilometres = 18520 Description: +1000nm in Eq. Atlantic on passage |
| Other geological/geophysical measurements | Quantity: 71 Description: heat flow |
