RRS Charles Darwin CD105A

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Charles Darwin (74AB)
Cruise identifierCD105A
Cruise period1997-05-29 — 1997-06-09
Port of departureLisbon, Portugal
Port of returnVigo, Spain
ObjectivesThis cruise (leg) was the first of the EC-MAST Ocean Margin Exchange (OMEX) project phase II-II focusing on the NW Iberian continental shelf and slope. It carried out multibeam echo-sounding, associated side-scan and 3.5kHz sounding to map the sea-bed bathymetry and structure. Box and Kasten coes were taken to analyse the bed sediment structure for age, content, magnetic susceptability and other determinands to estimate deposition rates from the water above, the fate of deposited material and a record through thousands of years in which to place the present processes.
A trial inverted echo sounder deployment was also carried out.
Chief scientistJohn Huthnance (Proudman Oceanographic Laboratory)
Coordinating bodyUniversite Libre de Bruxelles
Cruise reportRRS Charles Darwin CD105A cruise report cd105.pdf (1.82 MB)  RRS Charles Darwin CD105A cruise report cd105ab.pdf (2.43 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificThe continental slope off NW Portugal and Spain
Track chartsRRS Charles Darwin CD105A cruise track — cd105track.pdf (0.08 MB) 
Physical oceanography 
BathythermographQuantity: number of stations = 8
Description: XBT for swath bathymetry sound velocity
Other physical oceanographic measurementsQuantity: number of stations = 1
Description: Sound velocity profiler for swath bathymetry
Geology and geophysics 
Core - soft bottomQuantity: number of stations = 4
Description: Kasten cores near 41deg48'N, depths - 110, 1600, 2700m
Core - soft bottomQuantity: number of stations = 9
Description: Box cores. Subsamples taken for different analyses by Dr. Hall and Dr. J-L Reyss
Multi-beam echosoundingQuantity: activity duration in days = 10
Description: Multibeam echosounding for swath bathymetry
Long/short range side scan sonarQuantity: activity duration in days = 10
Description: Side-scan sonar associated with RRS Darwin Simrad Multi-beam echosounding
Single channel seismic reflectionQuantity: activity duration in days = 10
Description: 3.5kHz sounder (paper chart)
Moorings, landers, buoys 
Physical oceanography 
Sea level (inc. bot. press., inverted echosounder)42° 23' 11" N  9° 29' 29" W — Inverted Echo Sounder one at 1350m deployed 31 May 1997 recovered 8 June 1997
Data held at BODC 
Discrete samples 
8  Expendable BathythermographTemperature of the water column
4  Kasten corerStable isotopes in sediment
Geological sample magnetic, electrical and acoustic properties
Geological sample density
Sediment water content, porosity and surface area
Inorganic chemical composition of sediment or rocks
Carbon concentrations in sediment
Sediment grain size parameters
10  Sample taken from ship's non-toxic supplySalinity of the water column