Cruise inventory

RRS Shackleton S2/76

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Shackleton (74SF)
Cruise identifierS2/76
Cruise period1976-04-30 — 1976-05-25
StatusCompleted
Port of departureCallao, Peru
Port of returnBalboa, Panama
PurposeResearch
ObjectivesThe principle cruise objectives were to obtain geochemical samples of the East Pacific Rise, the Peru Basin, the Bauer Deep and the Panama Basin, and also samples of atmospheric dust particles. It was intended to collect bottom sediment using Piston and Gravity Corers, water samples using Niskin and Nio bottles in deep and shallow casts, plankton samples, and air particulates using large fibre screens. Initial analysis of samples on board was proposed following water filtration and removal of pore water from sediments.
1. To study the expression of hydrothermal processes in east Pacific sediments with different environmental characteristics
2. To study the diagenesis of sediments related to the breakdown of organic matter.
3. To study profiles of particulate matter in sea water.
4. To study the geochemistry of plankton.
5. To study the vertical distribution of dissolved iodine species in sea water.
6. To study the loadings and geochemistry of atmospheric dusts in the S.E.Pacific.
7. To study the geochemistry of Pacific metalliferous sediments.
8. To study the geochemistry of sediments on a west-east profile off Peru.
9. To study the concentrations and types of humic material in sea water from deep-sea areas, especially in the region of equatorial productivity.
Chief scientistHarry Elderfield (University of Leeds Department of Earth Sciences)
Coordinating bodyNERC
Cruise reportRRS Shackleton S2/76 cruise report shackleton2_76.pdf — access key 'C' (1.08 MB) 
Ocean/sea areas 
GeneralNorth East Pacific Ocean (limit 180W)
South East Pacific Ocean (limit 140W)
Track chartsRRS Shackleton S2/76 cruise track — shackleton2_76track.pdf (0.24 MB) 
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of profiles = 40
Description: thirty litre Niskin bottles.
Chemical oceanography 
PhosphateQuantity: number of samples = 540
Description: Water samples and cores analysed for nutrients.
NitrateQuantity: number of samples = 540
Description: Water samples and cores analysed for nutrients.
SilicateQuantity: number of samples = 540
Description: Water samples and cores analysed for nutrients.
AlkalinityDescription: Core sub samples analysed for alkalinity, major elements and metal analysis.
Trace elementsDescription: Core sub samples analysed for alkalinity, major elements and metal analysis.
Contamination 
Trace metalsDescription: Core sub samples analysed for alkalinity, major elements and metal analysis.
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 35
Description: gravity cores.