RRS Charles Darwin CD77
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Charles Darwin (74AB) |
| Cruise identifier | CD77 |
| Cruise period | 1993-03-18 — 1993-04-18 |
| Status | Completed |
| Port of departure | Ponta Delgada, Portugal |
| Port of return | Ponta Delgada, Portugal |
| Purpose | Research |
| Objectives | Study of hydrothermal plumes and hydrothermal sedimentation |
| Chief scientist | Harry Elderfield (University of Cambridge Department of Earth Sciences) |
| Project | BRIDGE |
| Coordinating body | NERC |
| Ocean/sea areas | |
| General | North East Atlantic Ocean (limit 40W) |
| Specific | Mid-Atlantic ridge, 23-29N;43-45W |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| CTD stations | Quantity: number of profiles = 21 Description: Deep casts, principally over 50-500m above bottom with transmissometer |
| Subsurface temperature and salinity measurements | Quantity: number of deployments = 19 Description: deployments of ZAPS sled with CTD-nephelometer, Mn probe |
| Transparency (eg transmissometer) | Quantity: number of profiles = 21 Description: Deep casts, principally over 50-500m above bottom with transmissometer |
| Chemical oceanography | |
| Other dissolved gases | Quantity: number of profiles = 21 Description: rosette sampler (11 bottles) - radon and helium |
| Phosphate | Quantity: number of profiles = 21 Description: rosette sampler (11 bottles) |
| Nitrate | Quantity: number of profiles = 21 Description: rosette sampler (11 bottles) |
| Silicate | Quantity: number of profiles = 21 Description: rosette sampler (11 bottles) |
| Contamination | |
| Trace metals | Quantity: number of profiles = 21 Description: rosette sampler (11 bottles) - metals and aluminium |
| Geology and geophysics | |
| Dredge | Quantity: number of deployments = 3 Description: rock/pipe dredges |
| Core - soft bottom | Quantity: number of cores = 4 Description: 1.2m gravity cores |
| Other geological/geophysical measurements | Quantity: number of deployments = 8 Description: bottom mounted pumps for particles |
| Moorings, landers, buoys | |
| Geology and geophysics | |
| Other geological/geophysical measurements | 23° 22' 0" N 44° 57' 0" W — 0444-1344 30 Mar |
| Other geological/geophysical measurements | 23° 22' 0" N 44° 57' 0" W — 0241-1029 31 Mar |
| Other geological/geophysical measurements | 26° 7' 59" N 44° 49' 59" W — 2325 03 Apr-1258 04 Apr |
| Other geological/geophysical measurements | 29° 10' 0" N 43° 10' 0" W — 0219-1650 10 Apr |
| Other geological/geophysical measurements | 29° 10' 0" N 43° 10' 59" W — 0001-1225 12 Apr |
| Other geological/geophysical measurements | 23° 22' 0" N 44° 57' 0" W — 0531-1300 01 Apr |
| Other geological/geophysical measurements | 26° 7' 59" N 44° 49' 59" W — 0053-1508 05 Apr |
| Other geological/geophysical measurements | 29° 10' 0" N 43° 10' 59" W — 0020-1220 09 Apr |
