Cruise inventory

RRS James Cook JC102

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Cook (740H)
Cruise identifierJC102
Cruise period2014-04-06 — 2014-04-18
StatusCompleted
Port of departurePort of Spain, Trinidad and Tobago
Port of returnPort of Spain, Trinidad and Tobago
PurposeResearch
ObjectivesThe 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 scientistChristine Peirce (University of Durham, Department of Earth Sciences)
Cruise reportRRS James Cook JC102 cruise report jc102.pdf — access key 'C' (32.07 MB) 
Ocean/sea areas 
GeneralNorth West Atlantic Ocean (limit 40W)
SpecificMid Atlantic Ridge
Track chartsRRS James Cook JC102 cruise track — jc102trk.pdf (00 MB) 
Measurements 
Geology and geophysics 
Geophysical measurements made at depthQuantity: number of stations = 1
Description: Sound velocity measurement from surface to 1000m depth - using a Valeport Midas sound velocity probe
Single-beam echosoundingQuantity: activity duration in days = 12
Description: Single beam bathymetry - using a Kongsberg EA600 12 kHz
Multi-beam echosoundingQuantity: activity duration in days = 12
Description: Multibeam bathymetry - using an Kongsberg EM120 in deep mode 191/191 beams, maximum angle 70/70, beam width 7000m/7000m in good sea conditions
Gravity measurementsQuantity: activity duration in days = 12
Description: Gravity using a LaCoste Romberg sea gravity meter (instrument S-040)
Moorings, landers, buoys 
Geology and geophysics 
Seismic refraction13° 23' 26" N  44° 51' 57" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 19' 48" N  44° 50' 57" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 22' 35" N  44° 52' 44" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 22' 40" N  44° 54' 55" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 21' 57" N  44° 54' 23" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 21' 43" N  44° 53' 29" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 21' 48" N  44° 52' 11" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 20' 34" N  44° 51' 36" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 20' 56" N  44° 53' 58" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 21' 17" N  44° 55' 9" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 19' 44" N  44° 52' 9" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 18' 46" N  44° 51' 42" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 18' 3" N  44° 52' 37" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 24' 23" N  44° 52' 35" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 24' 27" N  44° 53' 23" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 24' 26" N  44° 54' 43" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 23' 30" N  44° 55' 33" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 23' 29" N  44° 54' 18" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 23' 27" N  44° 53' 5" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 20' 53" N  44° 52' 45" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 22' 35" N  44° 53' 56" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 21' 25" N  44° 50' 52" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 20' 5" N  44° 53' 18" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 18' 56" N  44° 53' 1" W — Ocean-bottom seismograph (OBS) deployment
Seismic refraction13° 22' 30" N  44° 51' 23" W — Ocean-bottom seismograph (OBS) deployment