Cruise inventory

RRS Discovery D154_4

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD154_4
Cruise period1985-03-10 — 1985-04-11
StatusCompleted
Port of departureGrytviken, South Georgia and the South Sandwich Islands
Port of returnMontevideo, Uruguay
PurposeResearch
ObjectivesThe 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 scientistPeter F Barker (University of Birmingham Department of Geological Sciences)
Cruise reportRRS Discovery D154_4 cruise report d154.pdf — access key 'C' (3.42 MB) 
Ocean/sea areas 
GeneralSouth West Atlantic Ocean (limit 20W)
SpecificSouth Orkney Block Jane Basin Scotia Sea
Track chartsRRS Discovery D154_4 cruise track — d154track.pdf (00 MB) 
Measurements 
Biology and fisheries 
Sediment trapsDescription: Sediment and bottom samples were collected during the cruise. No. of samples not noted.
Gear researchDescription: A new digital multichannel seismic acquisition system was trialed during the cruise. No of trials not noted.
Geology and geophysics 
Core - soft bottomDescription: A number of cores were collected during the cruise. No. of cores not noted.
In-situ seafloor measurement/samplingDescription: Sediment and bottom samples were collected during the cruise. No. of samples not noted.