- Resources
- Inventories
- Cruise inventory
- Report
- 6333
RRS James Clark Ross JR19930331 (JR05)
Cruise summary report
Cruise Info. | |
Ship name (ship code) | RRS James Clark Ross (74JC) |
Cruise identifier | JR19930331 (JR05) |
Cruise period | 1993-03-31 — 1993-04-17 |
Status | Completed |
Port of departure | Montevideo, Uruguay |
Port of return | Ascension Island, United Kingdom |
Purpose | Research |
Objectives | To carry out multichannel seismic reflection, sonobuoy refraction, gravity, magnetic and echosounder surveys of the mid-Atlantic Ridge in the vicinity of Ascension Island. These surveys would enable us to infer the detailed crustal and uppermost mantle structure of a hotspot-influenced slow-spreading ridge. |
Chief scientist | Tim A Minshull (University of Cambridge Department of Earth Sciences) |
Project | Seismic Survey of the Mid-Atlantic Ridge near Ascension Island |
Cruise report | (0.78 MB) |
Ocean/sea areas | |
General | South Atlantic Ocean |
Track charts | (0.03 MB) |
Measurements | |
Physical oceanography | |
Bathythermograph | Description: XBT deployments took place at various points during the cruise No. of deployments not noted. |
Subsurface temperature and salinity measurements | Quantity: number of samples = 2 Description: At the Vitoria-Trinidade seamount chain temperature and magnetometer samples were taken. No. of samples not noted. |
Biology and fisheries | |
Gear research | Quantity: number of deployments = 1 Description: An XBT deployment took place in a drum filled with seawater on deck as a trial. |
Geology and geophysics | |
Single-beam echosounding | Description: A number of sonobouy deployments took place throughout the cruise. No. of deployments not noted. |
Magnetic measurements | Quantity: number of deployments = 2 Description: 10kHz fish was deployed and the magnetometer was deployed on the contenental shelf. |
Magnetic measurements | Quantity: number of samples = 2 Description: At the Vitoria-Trinidade seamount chain temperature and magnetometer samples were taken. No. of samples not noted. |