NERC Data Catalogue Service
2006 Strategic Environmental Assessment SEA7 Technical Report - hydrocarbon prospectivity, earthquakes, continental shelves and Rockall Trough surficial and sea-bed geology and sea-bed processes
This report is a contribution to the Strategic Environmental Assessment (SEA7) conducted by the Department of Trade and Industry (now Department of Energy and Climate Change). Investigations of the hydrocarbon prospectivity and earthquake activity include the whole of SEA7 but in this report investigations of the sea-bed sediments are restricted to the Hebrides Shelf, Rockall Trough and east Rockall Bank.
On the Hebrides Shelf, Hebrides Slope, east Rockall Bank and in the deep-water Rockall Trough the modern sea-bed sediments are mainly composed of mixtures of former glacial deposits and grains of modern interglacial biogenic carbonate shell. Former glacial deposits and modern biogenic carbonate are now mainly mixed and transported by wave-orbital currents and residual currents on Rockall Bank and by combinations of wave-orbital currents, tidal currents and residual currents on the Hebrides Shelf and upper Hebrides Slope. Below approximately 300 metres water depth in the Rockall Trough the sea-bed sediments are mainly transported by circulating deep-water residual currents.
Simple
- Date (Publication)
- 2006-01-01
- Identifier
- British Geological Survey / BGS_SEA_107
+44 (0) 1823 284077
- Maintenance and update frequency
- notPlanned Not planned
- Name
- Documents
- Keywords
- SeaDataNet Parameter Discovery Vocabulary
- GEMET - INSPIRE themes, version 1.0
-
- Geology
- SeaVoX Vertical Co-ordinate Coverages
- Use limitation
- 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.
- Access constraints
- intellectualPropertyRights Intellectual property rights
- Distance
- 5 http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/uom/gmxUom.xml#m
- Metadata language
- EnglishEnglish
- Topic category
-
- Environment
- Geoscientific information
- Oceans
- Date (Revision)
- 2006-01-01
- Unique resource identifier
- North Atlantic Ocean
))
- Begin date
- 2006-01-01
- End date
- 2006-01-01
- Supplemental Information
- http://www.offshore-sea.org.uk/site/index.php
- Reference system identifier
- OGP / urn:ogc:def:crs:EPSG::4326
- Distribution format
-
- OnLine resource
-
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.
- Hierarchy level
- dataset Dataset
- Statement
- This report was prepared by Richard Holmes, Ken Hitchen and Lars Ottemoller of the British Geological Survey as part of the UK Department of Energy and Climate Change's Offshore Energy Strategic Environmental Assessment programme. Sediment analyses have been derived from samples taken from sea-bed to approximately 10 cm below sea-bed. After laboratory quantitative analysis of dried sediments, the BGS classifies sea-bed sediment textures to accord with modified Folk (1954) classes, which are based on weight % of sediment grains over a range of Wentworth size classes. The values of weight % carbonate in the total sediment and in the sediment-size classes are also routinely determined. These values can be interpreted as a measure of the inputs to the sediment from biological sources of calcium carbonate. For the BGS regional surveys, the proportions of mud, sand and gravel were quantified by square-mesh wet sieving using a 63micron sieve to determine mud (a mixture of silt and clay) and with a 2mm sieve to determine gravel (in the granular gravel to pebble and larger size classes).
- File identifier
- aba64100-c15f-4de3-e044-0003ba6f30bd XML
- Metadata language
- EnglishEnglish
- Hierarchy level
- dataset Dataset
- Date stamp
- 2011-08-30
- Metadata standard name
- MEDIN Discovery Metadata Standard
- Metadata standard version
- Version 2.3.5
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