RRS Discovery D154_4
Cruise summary report
|Ship name (ship code)||RRS Discovery (74E3)|
|Cruise period||1985-03-10 — 1985-04-11|
|Port of departure||Grytviken, South Georgia and the South Sandwich Islands|
|Port of return||Montevideo, Uruguay|
|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)|
|General||South West Atlantic Ocean (limit 20W)|
|Specific||South Orkney Block Jane Basin Scotia Sea|
|Track charts||(0.05 MB)|
|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.|