Cruise inventory

RRS Charles Darwin CD100

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Charles Darwin (74AB)
Cruise identifierCD100
Cruise period1996-04-11 — 1996-05-16
StatusCompleted
Port of departurePonta Delgada, Portugal
Port of returnCadiz, Spain
PurposeResearch
Objectives1. To make a detailed survey of a single major spreading segment adjacent to a transform fault, collecting bathymetry, high-resolution deep-towed side-scan sonar images, measurements of gravity at the surface, and of magnetic field at the surface and at the sea floor.
2. To obtain ground truth for this survey through dredging and photography.
3. To correlate and coanalyse these observations through a programme of image processing and image analysis.
4. To conduct numerical modelling of crustal deformation.
Chief scientistJohnson R Cann (University of Leeds Department of Earth Sciences)
Cruise reportRRS Charles Darwin CD100 cruise report cd100.pdf — access key 'C' (9.23 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
SpecificMid-Atlantic Ridge
Measurements 
Geology and geophysics 
DredgeQuantity: number of hauls = 20
Description: 20 dredges took place over the whole period of the cruise.
Bottom photographyQuantity: number of deployments = 3
Description: Camera stations deployed on the cruise.
Multi-beam echosoundingQuantity: number of experiments = 3
Description: Magnetometer was streamed, Simrad EM12 and shipboard 3 component magnetometer switched on.
Multi-beam echosoundingQuantity: number of surveys = 1
Description: Simrad survey
Long/short range side scan sonarQuantity: number of deployments = 11
Description: 11 Tobi line launches. Sidescan images taken, but of poor quality. Bathymetry poor.
Magnetic measurementsQuantity: number of experiments = 3
Description: Magnetometer was streamed, Simrad EM12 and shipboard 3 component magnetometer switched on.
Other geological/geophysical measurementsQuantity: number of surveys = 1
Description: Atlantis RTI Survey
Moorings, landers, buoys 
Meteorology 
Routine standard measurements30° 0' 0" N  42° 0' 0" W — Boat drill held at work area.
Geology and geophysics 
Bottom photography29° 49' 5" N  42° 41' 23" W — 3rd camera station deployment point.