RRS James Cook JC149 Leg1
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS James Cook (740H) |
| Cruise identifier | JC149 Leg1 |
| Cruise period | 2017-04-17 — 2017-05-03 |
| Status | Completed |
| Port of departure | Freeport, Bahamas |
| Port of return | Pointe-à-Pitre, Guadeloupe |
| Purpose | Research |
| Objectives | The VOILA (Volatile recycling in the Lesser Antilles arc: Processes and consequences) research programme consisted of two cruises onboard RRS James Cook. Cruise JC149 forms the second leg. The cruise had two main aims: (1) to shoot into and collect 34 broad-band ocean bottom seismometers (BBOBS) sourced from Germany (DEPAS - 24 instruments) and USA (Scripps Institute of Oceanography - 10 instruments) deployed in March 2016 and (2) to conduct an active source seismic experiemnt with Short-period OBS sourced from the UK (OBIC - 25 instruments) and Germany (DEPAS - 24 instruments). Underway geophysical data (PES, MBES, SBP and gravity) were also collected along most transit between stations. Towed magnetic data were also collected along longer transits. One dredge was completed. A detailed swath survey of Kick'em Jenny volcano as requested by host-nation collaborators was also conducted. |
| Chief scientist | Jennifer S Collier (Imperial College London Department of Earth Science and Engineering) |
| Cruise report |  (13.99 MB) |
| Ocean/sea areas | |
| General | Caribbean Sea |
| Specific | Lesser Antilles |
| Track charts | (0.18 MB) |
| Measurements | |
| Physical oceanography | |
| Other physical oceanographic measurements | Quantity: number of stations = 8 Description: Sound velocity / temperature vs depth |
| Geology and geophysics | |
| Dredge | Quantity: number of stations = 1 Description: Dredge (hard rock) |
| Geophysical measurements made at depth | Quantity: number of recoveries = 25 Description: Broad-band Ocean-bottom seismometer recovery. Passive recordings. |
| Single-beam echosounding | Quantity: activity duration in days = 59 Description: Single-beam echosounding along all tracks |
| Multi-beam echosounding | Quantity: activity duration in days = 45 Description: Swath bathymetry along all tracks apart from in French waters |
| Multichannel seismic reflection | Quantity: number of track lines = 9 Description: Multichannel seismic reflection |
| Seismic refraction | Quantity: number of deployments = 238 Description: Short period Ocean bottom seimometer deployments. |
| Seismic refraction | Quantity: number of track lines = 3 Description: Seismic refraction into SP-OBS listed above |
| Gravity measurements | Quantity: activity duration in days = 59 Description: Gravity run continuously along all tracks |
| Magnetic measurements | Quantity: activity duration in days = 30 Description: Magnetometer towed along selected tracks |