RRS Charles Darwin CD4

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Charles Darwin (74AB)
Cruise identifierCD4
Cruise period1985-05-17 — 1985-06-11
Port of departureArdrossan, United Kingdom
Port of returnFalmouth, United Kingdom
ObjectivesThe general aim of the cruise was to obtain geophysical data that would yield information on the formation of the continental margin on the western side of Hatton Bank, part of Rockall Plateau.
The cruise had two principal experimental objectives:
1. To obtain a cross sectional map of seismic velocity in the crust across the margin.
2. To image structures in the crust across the margin.
Chief scientistGraham K Westbrook (University of Birmingham Department of Geological Sciences)
Cruise reportRRS Charles Darwin CD4 cruise report cd4.pdf (1.80 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificN.E. Atlantic
Track chartsRRS Charles Darwin CD4 cruise track — trk3155.html RRS Charles Darwin CD4 cruise track — trk3155a.html
Physical oceanography 
Other physical oceanographic measurementsQuantity: number of stations = 2
Description: sound velocity stations
Geology and geophysics 
Multi-beam echosoundingQuantity: track kilometres = 3680
Single channel seismic reflectionQuantity: track kilometres = 864
Seismic refractionQuantity: track kilometres = 640
Gravity measurementsQuantity: track kilometres = 3680
Magnetic measurementsQuantity: track kilometres = 2016
Other geological/geophysical measurementsQuantity: number of deployments = 8
Description: Ocean bottom seismometers