Cruise inventory

RRS Charles Darwin CD70

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Charles Darwin (74AB)
Cruise identifierCD70
Cruise period1992-07-11 — 1992-08-02
StatusCompleted
Port of departureGreenock, United Kingdom
Port of returnBarry, United Kingdom
PurposeResearch
Objectives1. A multichannel seismic (mcs) and ocean bottom seismometer (OBS) survey of the Reykjanes Ridge active spreading centre at 61-62 degrees north, to investigate the effect of the Iceland plume on active rifting processes.
2. Another mcs and OBS survey of the Edoras Bank continental margin, in an area already drilled by the DSDP.
The two surveys will provide crustal constraints on rifting within the sphere of influence of the Iceland Plume: the Reykjanes Ridge at the present day, and the Edoras Bank at the time of continental breakup.
Chief scientistRobert S White (University of Cambridge Department of Earth Sciences)
Cruise reportRRS Charles Darwin CD70 cruise report cd70.pdf — access key 'C' (0.78 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificReykjanes ridge, Edoras bank continental shelf
Track chartsRRS Charles Darwin CD70 cruise track — cd70track.pdf (0.04 MB) 
Measurements 
Geology and geophysics 
Single-beam echosoundingQuantity: activity duration in days = 18
Description: underway bathymetric profiles (10kHz)
Single-beam echosoundingQuantity: activity duration in days = 5
Description: 3.5kHz echo sounding
Multichannel seismic reflectionQuantity: track kilometres = 1100
Description: 48-channel multi-channel seismic profiles
Seismic refractionQuantity: number of deployments = 6
Description: disposable sonobuoys
Seismic refractionQuantity: number of deployments = 10
Description: Ocean bottom seismometer
Magnetic measurementsQuantity: activity duration in days = 18
Description: underway magnetics profiles