aba64100-c17f-4de3-e044-0003ba6f30bd English dataset Mary Mowat British Geological Survey (BGS) +44 (0)131 667 1000 +44 (0)131 668 4140 offshoredata@bgs.ac.uk pointOfContact 2011-08-30 MEDIN Discovery Metadata Standard Version 2.3.5 urn:ogc:def:crs:EPSG::4230 OGP 2002 Strategic Environmental Assessment SEA4 Kommandor Jack SEA4 Survey Leg 1 - geophysical survey (north UKCS) 2002-01-01 publication BGS_SEA_168 British Geological Survey As part of the Department of Trade and Industry's (now Department of Energy and Climate Change) Strategic Environmental Assessment (SEA4) a geophysical survey of the UKCS north of Shetland (Northern Triangle) was carried out. The objectives were to collect EM120 multibeam and backscatter data over the northernmost area of the UKCS, known as the northern triangle (an area defined approximately by the points 60 30 N, 03 30 W, 61 0 N, 01 40 E and 63 50 N, 0.5 W). The aims were to: create a regional bathymetric map of the northern triangle in the water depths between 600 and 2400m; obtain regional EM120 backscatter data over the same area; define the extent of the mud diapir province discovered during previous reconnaissance TOBI and seismic cruises; create high resolution bathymetric and backscatter maps of specific features, such as the mud diapirs; carry out a reconnaissance survey of the shallow water part of the northern triangle (200 and 500m water depth) collecting both bathymetry and backscatter data using an EM1002 multibeam system; complete, during the cruise, a preliminary interpretation of the above data, to be used as a guide for the sampling and seabed photography cruise which followed immediately. Multibeam and chirp seismic data and sidescan sonar data were collected. Data are available. 21 processed multibeam files are available. Raw data, backscatter mosaics and bathymetric contours also available. Seismic data are also available. Cruise Report is also available. Paul Henni British Geological Survey (BGS) +44 (0)131 667 1000 Murchison House, West Mains Road Edinburgh EH9 3LA UK offshoredata@bgs.ac.uk custodian Department for Energy and Climate Change (DECC) +44 0300 060 4000 +44 (0) 1823 284077 Admiralty Way London SW1A 2HD UK enquiries@decc.gsi.gov.uk originator notPlanned Delimited Documents Image Text or Plaintext NDGO0001 Bathymetry and Elevation Seismic reflection Side-scan sonar SeaDataNet Parameter Discovery Vocabulary 2011-03-25 revision Geology Hydrography GEMET - INSPIRE themes, version 1.0 2008-06-01 publication crust sediment SeaVoX Vertical Co-ordinate Coverages 2008-06-01 publication The SEAs data were produced as part of the UK Department of Energy and Climate Change's Offshore Energy Strategic Environmental Assessment programme; Crown Copyright, all rights reserved. The DECC SEA must be acknowledged in any maps or publications that make use of the data. All the data files are freely available to the public. The Strategic Environmental Assessment (SEA) data portal provides free access to available data and reports which have been produced through the SEA process. The site is run and managed by BGS on behalf of the Department of Energy and Climate Change (DECC). Many files can be downloaded directly from this website. Those that are too large to download can be ordered via the website for postal delivery from BGS. BGS (NERC) has been contracted by DECC to publish SEA datasets on its behalf. All intellectual property rights (including , without limitation, copyrights, database rights and all other rights which subsist or may at any time in the future subsist in the Dataset(s)) in the Dataset(s) ('Intellectual Property Rights') are owned by DECC (formerly the Department of Trade and Industry, and the Department for Business, Enterprise and Regulatory Reform). BGS has been authorised by DECC to use SEA datasets for all purposes but on a 'not-for-profit basis'. BGS has been authorised by DECC to pass on SEA datasets to third parties so that they can use them for all purposes but on a 'not-for-profit' basis. intellectualPropertyRights 5 English environment geoscientificInformation oceans SeaVoX salt and fresh water body gazetteer 2006-01-01 revision North Atlantic Ocean -7 1.4 58.7 64 2002-07-01 2002-07-23 http://www.offshore-sea.org.uk/site/index.php http://www.bgs.ac.uk/data/sea/home.html Strategic Environmental Assessment (SEA) data portal The Strategic Environmental Assessment (SEA) data portal provides free access to available data and reports which have been produced through the UK Department of Energy and Climate Change SEA process. The site is run and managed by BGS on behalf of the Department of Energy and Climate Change (DECC). Many files can be downloaded directly from this website. Those that are too large to download can be ordered via the website for postal delivery from BGS. download dataset Offshore Survey and Engineering (OSAE) carried out the seismic survey using a CHIRP II Sub-profiler and the multibeam survey using Simrad EM120 and EM1002 as part of the UK Department of Energy and Climate Change's Offshore Energy Strategic Environmental Assessment programme. Approximately 22,500 km2 of EM120 multibeam bathymetry and backscatter data were obtained in water depths between 600 and 2400 m. In addition, approximately 450 km2 of EM1002 multibeam bathymetry and backscatter data were obtained in water depths less than 600 m. The only major problem concerned the quality of the EM120 backscatter data, which was much poorer than had been anticipated. National Oceanography Centre, Southampton carried out the sidescan sonar survey using a Simrad EA 500 echo sounder.