RRS James Cook JC102
Cruise summary report
| Cruise Info. | |||||||||||||
| Ship name (ship code) | RRS James Cook (740H) | ||||||||||||
| Cruise identifier | JC102 | ||||||||||||
| Cruise period | 2014-04-06 — 2014-04-18 | ||||||||||||
| Status | Completed | ||||||||||||
| Port of departure | Port of Spain, Trinidad and Tobago | ||||||||||||
| Port of return | Port of Spain, Trinidad and Tobago | ||||||||||||
| Purpose | Research | ||||||||||||
| Objectives | The primary purpose of this cruise was to install an array of 25 ocean-bottom seismographs to record passive micro-seismicity data at the 13º 20'N oceanic core complex on the Mid-Atlantic Ridge. This array of seismographs will be left in place for approximately 6 months to record local seismic events associated with extension-related slippage on the fault planes that accommodate spreading at this plate boundary. The data will be used to test models of plate accretion at slower spreading rates. This cruise is the first of three: i) passive array deployment; ii) passive array recovery; and iii) active source seismic imaging, coupled with Autosub near-seabed geophysical and oceanographic surveying. This cruise comprised a transit to/from the work area of ~9 days in total, 0.5 days of OBS deployment and 2.5 days of swath bathymetry data in-fill in the work area. Swath bathymetry and gravity data were acquired throughout the transits to/from ports. | ||||||||||||
| Chief scientist | Christine Peirce (University of Durham, Department of Earth Sciences) | ||||||||||||
| Cruise report |  (32.07 MB) | ||||||||||||
| Ocean/sea areas | |||||||||||||
| General | North West Atlantic Ocean (limit 40W) | ||||||||||||
| Specific | Mid Atlantic Ridge | ||||||||||||
| Track charts | (0.78 MB) | ||||||||||||
| Measurements | |||||||||||||
| Geology and geophysics | |||||||||||||
| Geophysical measurements made at depth | Quantity: number of stations = 1 Description: Sound velocity measurement from surface to 1000m depth - using a Valeport Midas sound velocity probe | ||||||||||||
| Single-beam echosounding | Quantity: activity duration in days = 12 Description: Single beam bathymetry - using a Kongsberg EA600 12 kHz | ||||||||||||
| Multi-beam echosounding | Quantity: activity duration in days = 12 Description: Multibeam bathymetry - using an Kongsberg EM120 in deep mode 191/191 beams, maximum angle 70º/70º, beam width 7000m/7000m in good sea conditions | ||||||||||||
| Gravity measurements | Quantity: activity duration in days = 12 Description: Gravity using a LaCoste Romberg sea gravity meter (instrument S-040) | ||||||||||||
| Moorings, landers, buoys | |||||||||||||
| Geology and geophysics | |||||||||||||
| Seismic refraction | 13° 18' 3" N 44° 52' 37" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 18' 56" N 44° 53' 1" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 24' 26" N 44° 54' 43" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 23' 30" N 44° 55' 33" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 23' 27" N 44° 53' 5" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 23' 26" N 44° 51' 57" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 22' 35" N 44° 52' 44" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 22' 35" N 44° 53' 56" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 22' 40" N 44° 54' 55" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 21' 43" N 44° 53' 29" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 20' 34" N 44° 51' 36" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 24' 23" N 44° 52' 35" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 23' 29" N 44° 54' 18" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 22' 30" N 44° 51' 23" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 21' 57" N 44° 54' 23" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 20' 5" N 44° 53' 18" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 21' 48" N 44° 52' 11" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 21' 25" N 44° 50' 52" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 20' 53" N 44° 52' 45" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 20' 56" N 44° 53' 58" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 21' 17" N 44° 55' 9" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 19' 44" N 44° 52' 9" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 19' 48" N 44° 50' 57" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 18' 46" N 44° 51' 42" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Seismic refraction | 13° 24' 27" N 44° 53' 23" W — Ocean-bottom seismograph (OBS) deployment | ||||||||||||
| Data held at BODC | Get data | ||||||||||||
| Series/Profiles | |||||||||||||
| 1 Meteorological data logger | Visible waveband radiance and irradiance measurements in the atmosphere Horizontal spatial co-ordinates Air pressure Date and time Wind strength and direction Air temperature Solar Radiation Atmospheric humidity Visible waveband radiance and irradiance measurements in the atmosphere Horizontal spatial co-ordinates Air pressure Date and time Wind strength and direction Air temperature Solar Radiation Atmospheric humidity
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| 1 Multiple instrument types | Horizontal spatial co-ordinates Transmittance and attenuance of the water column Date and time Salinity of the water column Temperature of the water column Raw fluorometer output Metadata parameters Electrical conductivity of the water column Chlorophyll pigment concentrations in water bodies Horizontal spatial co-ordinates Transmittance and attenuance of the water column Date and time Salinity of the water column Temperature of the water column Raw fluorometer output Metadata parameters Electrical conductivity of the water column Chlorophyll pigment concentrations in water bodies
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| 1 Single-beam echosounder | Horizontal spatial co-ordinates Date and time Platform or instrument orientation Horizontal platform movement Bathymetry and Elevation Horizontal spatial co-ordinates Date and time Platform or instrument orientation Horizontal platform movement Bathymetry and Elevation
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| 2 Sound Velocity Probe | Sound velocity and travel time in the water column Reference numbers Temperature of the water column Vertical spatial coordinates Sound velocity and travel time in the water column Reference numbers Temperature of the water column Vertical spatial coordinates
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| Discrete samples | |||||||||||||
| 1 Sound Velocity Probe |
