BODC Cruise Metadata Report for RRS Charles Darwin (74AB) cruise CD174

Introduction

This report collates information from the BODC cruise inventory and oceanographic databases. It presents

Cruise Inventory Information
A summary of BODC data holdings for the cruise from the
- National Oceanographic Database
- Projects Database
References - including cruise tracks and cruise reports

Cruise Inventory Information

Long name	RRS Charles Darwin (74AB) cruise CD174
Short name	CD174
Objectives and Narrative	Long (Part 1): Selected landscapes on the outer shelf between Ireland and the Outer Isles west of Scotland surveyed with high resolution profile equipment, including sparker and boomer. The areas surveyed cover a range of topographies typical of the area, including rock platform areas (Stanton Banks), Intrusions (Laconia Bank), iceberg plough-marked seabed (shelf edge), carbonate banks, topographic hollows with soft sediment infill (Malin Deep), active sediment banks and waves Hempton's Turbot Bank and NW Islay. This will allow greater resolution on BGS seabed sediments and Quaternary maps for the area, in particular providing morphological characterization. These surveys will improve the geological mapping resolution, in particular identifying various substrates, and allow extrapolation of the associated seabed habitat using BGS extensive profile database. The data will be integrated with swath survey, video and sample data to be collected by partner organizations within EU Interreg IIIb project MESH and used to test habitat mapping protocols. Holmes (Parts 2 and 3): MARINE GEOLOGY AND GEOPHYSICS, ADJACENT IRISH AND UK ZONES ROCKALL TROUGH 1. Tie Barra Fan and Donegal Fan seismic stratigraphy to 5 secs two-way time 2. Comparison geological events on west and east flanks Rockall Trough UK and Irish zones 3. Investigation of timing, distribution and style of modern and historical submarine landslides and climate feedback into remobilisation of glacial, interglacial and contouritic sediments 4. Investigation of modern seabed processes in relation to sediment type and seabed features 5. Assessment of mass balance source to sink
Ship	RRS Charles Darwin
Departure Port	Fairlie, United Kingdom
Departure Date	2005-08-11
Arrival Port	Fairlie, United Kingdom
Arrival Date	2005-09-08
Principal Scientist(s)	David G Wallis (British Geological Survey Marine Operations)
Responsible Organisation	British Geological Survey, Edinburgh
Associated Project(s)	Continental Shelf and Margins
IHB Sea Areas Visited	Inner Seas off the West Coast of Scotland, North East Atlantic Ocean (limit 40W)
Marsden Squares Visited	181;4/182;3
Work Area Description
Unable to lookup cruise bounds at this time
Work Area Bounding Polygon
Southern Limit	unknown
Northern Limit	unknown
Western Limit	unknown
Eastern Limit	unknown

Cruise Inventory Datasets

Geology and geophysics
Gravity measurements	Quantity: track kilometres = 5000 Description: Marine gravity meter. Recorded in Ultrasys Long Format and MGD77.
Magnetic measurements	Quantity: track kilometres = 4000 Description: Proton magnetometer recorded in MGD77.
Single channel seismic reflection	Quantity: track kilometres = 200 Description: Sparker single channel, to approximately 1500m water depth only, simultaneously with airgun, pinger, multibeam
Single channel seismic reflection	Quantity: track kilometres = 5500 Description: Pinger 3.5khz, from approximately 500-2500m+ water depth, simultaneously with airgun, sparker to approx. 1500m water depth and multibeam
Single channel seismic reflection	Quantity: track kilometres = 500 Description: Surface tow boomer, simultaneously with sparker single channel
Single channel seismic reflection	Quantity: track kilometres = 1080 Description: Airgun single channel, from approximately 500-2500m+ water depth, simultaneously with sparker to approx. 1500m water depth, pinger, multibeam
Single channel seismic reflection	Quantity: track kilometres = 550 Description: Sparker single channel, simultaneously with surface tow boomer
Single channel seismic reflection	Quantity: survey square kilometres = 20700 Description: EM12 multibeam bathymetry and backscatter, from approximately 500-2500m+ water depth, simultaneously along airgun lines, sparker lines to approximately 1500m water depth, pinger
Single-beam echosounding	Quantity: track kilometres = 5000 Description: Precision echosounder Simrad EA500 recorded in MGD77.