RRS Charles Darwin CD100
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Charles Darwin (74AB) |
| Cruise identifier | CD100 |
| Cruise period | 1996-04-11 — 1996-05-16 |
| Status | Completed |
| Port of departure | Ponta Delgada, Portugal |
| Port of return | Cadiz, Spain |
| Purpose | Research |
| Objectives | 1. 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 scientist | Johnson R Cann (University of Leeds Department of Earth Sciences) |
| Cruise report |  (9.23 MB) |
| Ocean/sea areas | |
| General | North Atlantic Ocean |
| Specific | Mid-Atlantic Ridge |
| Measurements | |
| Geology and geophysics | |
| Dredge | Quantity: number of hauls = 20 Description: 20 dredges took place over the whole period of the cruise. |
| Bottom photography | Quantity: number of deployments = 3 Description: Camera stations deployed on the cruise. |
| Multi-beam echosounding | Quantity: number of surveys = 1 Description: Simrad survey |
| Multi-beam echosounding | Quantity: number of experiments = 3 Description: Magnetometer was streamed, Simrad EM12 and shipboard 3 component magnetometer switched on. |
| Long/short range side scan sonar | Quantity: number of deployments = 11 Description: 11 Tobi line launches. Sidescan images taken, but of poor quality. Bathymetry poor. |
| Magnetic measurements | Quantity: number of experiments = 3 Description: Magnetometer was streamed, Simrad EM12 and shipboard 3 component magnetometer switched on. |
| Other geological/geophysical measurements | Quantity: number of surveys = 1 Description: Atlantis RTI Survey |
| Moorings, landers, buoys | |
| Meteorology | |
| Routine standard measurements | 30° 0' 0" N 42° 0' 0" W — Boat drill held at work area. |
| Geology and geophysics | |
| Bottom photography | 29° 49' 5" N 42° 41' 23" W — 3rd camera station deployment point. |
