RRS Shackleton S1/83

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Shackleton (74SF)
Cruise identifierS1/83
Cruise period1982-12-02 — 1983-01-22
Port of departureGibraltar, Gibraltar
Port of returnGibraltar, Gibraltar
Objectives1) To determine the geological structures linking the two islands whose land geology was known in the most detail (Maio and Santiago) This knowledge should provide models for the uplift mechanism which created the islands.

2) To determine the relationship of the volcanic centres to the pre-existing structures of the oceanic crust.

3) To sample seamounts surrounding the island archipelago to place limits on the areal distribution of the distinctive magmatism of the islands.
Chief scientistIan A Hill (University of Leicester Department of Geology)
Cruise reportRRS Shackleton S1/83 cruise report shackleton1_83.pdf (1.01 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
Track chartsRRS Shackleton S1/83 cruise track — trk2857.html
Geology and geophysics 
DredgeQuantity: number of deployments = 3
Multi-beam echosoundingQuantity: track kilometres = 7428
Long/short range side scan sonarQuantity: track kilometres = 311
Single channel seismic reflectionQuantity: track kilometres = 4058
Seismic refractionQuantity: number of stations = 14
Description: no. of stations;sonobuoy
Gravity measurementsQuantity: track kilometres = 7541.344
Magnetic measurementsQuantity: track kilometres = 7408