RV Cirolana CIR4B/87
Cruise summary report
|Ship name (ship code)||RV Cirolana (74CZ)|
|Cruise period||1987-04-21 — 1987-04-30|
|Port of departure||Holyhead, United Kingdom|
|Port of return||Lowestoft, United Kingdom|
|Objectives||1. To measure the physical and mechanical properties of the muddy sediments of the northeast Irish Sea to a depth of approximately 1m to assess the uniformity of the seabed, using in situ measurements and recovered cores. Some core samples will be tested on board, while others will be returned to the laboratory for additional testing. Ship-board operations will include:
(a) Measurement of in situ density, using transmission and back-scatter densimeters.
(b) Recovery of sediment samples using the Kaston and Reineck corers. The Kaston cores will be sub-sampled with acrylic liners, as will the Reineck cores if on-board testing is possible. Core samples will be sealed for transport.
(c) Spot density measurements will be made on the cores with a Paar density guage and samples sealed for subsequent analysis of water content, Atterberg limits, particle size distribution and mineralogy.
(d) The fall cone and shear vane techniques will be used to measure sediment shear strength at horizons 200-400mm apart through the cores.
(e) Restricuted flow consolidation tests will be made on samples 200mm apart from a small number of cores.
2. To collect samples of seawater for trace element analysis.
|Chief scientist||Dennis S Woodhead (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)|
|Cruise report||(0.10 MB)|
|General||Irish Sea and St. George's Channel|
|Radioactivity||Quantity: number of samples = 30|
Description: water samples taken for trace metal analysis.
|Other chemical oceanographic measurements||Quantity: number of profiles = 14|
Description: density profiles of seabed
|Geology and geophysics|
|Core - soft bottom||Quantity: number of cores = 62|