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Metadata: British Geological Survey (BGS) Geophysical Survey 1992/2: Barra Fan (05/07/1992 to 06/07/1992)
Abstract:
This marine geophysical survey took place from 05/07/92 – 06/07/92 in the area of the Barra Fan on board the RV Kommandor Michael. The survey was carried out by the British Geological Survey (BGS), Marine Biological Association and Dunstaffnage Marine Laboratory. The aim of the survey was to investigate the source and fate of methane in marine sediments. Sub bottom seismic profiling data were collected using a Deep Tow Boomer. These data are archived by BGS. Technical details are contained in BGS Report WB/92/27. Report: Dobinson, A. 1992. Barra Fan Project: Geophysical Operations Report - Project 92/02, https://nora.nerc.ac.uk/id/eprint/529922/. GeoIndex Offshore - https://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=1992/2&.
Data holder:
British Geological Survey (BGS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 6836 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | British Geological Survey (BGS) Geophysical Survey 1992/2: Barra Fan (05/07/1992 to 06/07/1992) |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | abc9f747-53a1-0f38-e044-0003ba9b0d98 |
| Resource Identifier | This is the code assigned by the data owner. | BGS_CMD_REF257 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 1992-07-05 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 1992-07-06 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 5 |
| Spatial resolution unit | This describes the unit of spatial resolution which for distance must be metres. | urn:ogc:def:uom:EPSG::9001 |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | This marine geophysical survey took place from 05/07/92 – 06/07/92 in the area of the Barra Fan on board the RV Kommandor Michael. The survey was carried out by the British Geological Survey (BGS), Marine Biological Association and Dunstaffnage Marine Laboratory. The aim of the survey was to investigate the source and fate of methane in marine sediments. Sub bottom seismic profiling data were collected using a Deep Tow Boomer. These data are archived by BGS. Technical details are contained in BGS Report WB/92/27. Report: Dobinson, A. 1992. Barra Fan Project: Geophysical Operations Report - Project 92/02, https://nora.nerc.ac.uk/id/eprint/529922/. GeoIndex Offshore - https://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=1992/2&. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Geophysical equipment types used included: Deep Tow Boomer, Echo Sounder and Pinger. The survey was undertaken by British Geological Survey. Deep Tow Boomer: Source: BGS developed deep towed fish based on a Huntec boomer plate. Operating power 0.5kJ to a tow depth of 800m. Motion compensation applied. Hydrophone: Short 1m multi-element array towed behind the fish. Pinger: Edo Western 35/7.0 kHz tranducer in towed fish. Tow depth Sm. Power output 10kW using SlSA-248 transceiver. Transducer operated in 7.0 kHz mode. Bathymetry: Atlas Deso 20 with narrow beam deep water 33 kHz transducer rated to 2200m. Data also output digitally to Qubit Trac IV logging system. Positioning System: VERIPOS differential GPS system based on Sercel NR 103 DGPS receiver. This fully integrated unit received both GPS data and differential correction data, carried out the corrections processing and output a differentially corrected position to the Qubit Trac IV logging system. Correction data were received from shore stations at Wick, Brest and Barra. Two completely independent VERIPOS receivers were operated simultaneously giving 100% back up. Data Logging: Qubit Trac IV navigation processor/logger. Using position information input from the VERIPOS system the logger produced navigation information, helmsman display, track plotting to AO drum plotter and fix outputs at 5 minute intervals to all survey recorders, whilst logging navigation and bathymetry survey data at half minute intervals to magnetic tape. Seismic Firing Control: BGS seismic control unit to synchronise firing of pinger and deep tow boomer to allow concurrent operation. Firing interval of boomer was 2~ seconds with interleaved firing of pinger to allow 1 second shot interval. An inhibit pulse was provided to the echo sounder at pinger shot instant. For more information see the report, https://nora.nerc.ac.uk/id/eprint/529922/. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | NDGO0001 |
| Keyword title | NERC OAI Harvesting | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Geology |
| Keyword title | Geology | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | soil and sediment |
| Keyword title | soil and sediment | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | crust |
| Keyword title | crust | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Bathymetry and Elevation |
| Keyword title | Bathymetry and Elevation | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Two-dimensional seismic reflection |
| Keyword title | Two-dimensional seismic reflection | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 57.0647 |
| East | The eastern-most limit of the data resource in decimal degrees | -9.6381 |
| South | The southern-most limit of the data resource in decimal degrees | 56.8799 |
| West | The western-most limit of the data resource in decimal degrees | -10.1098 |
| Regional sea | Central Rockall Basin | |
| Atlantic North-West Approaches, Rockall Trough and Faeroe/Shetland Channel | ||
| St Kilda | ||
| Hebrides Terrace | ||
| Peach | ||
| Anton Dohrn | ||
| NORTHEAST ATLANTIC OCEAN (40W) | ||
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | British Geological Survey (BGS) | |
| Phone | +44 (0)131 667 1000 | |
| Fax | +44 (0)131 668 4140 | |
| Delivery point | The Lyell Centre, Research Avenue South | |
| Postal code | EH14 4AP | |
| City | Edinburgh | |
| Country | UK | |
| enquiries@bgs.ac.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | British Geological Survey (BGS) | |
| Phone | +44 (0)131 667 1000 | |
| Fax | +44 (0)131 668 4140 | |
| Delivery point | The Lyell Centre, Research Avenue South | |
| Postal code | EH14 4AP | |
| City | Edinburgh | |
| Country | UK | |
| enquiries@bgs.ac.uk | ||
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | British Geological Survey (BGS) | |
| Phone | +44 (0)131 667 1000 | |
| Fax | +44 (0)131 668 4140 | |
| Delivery point | The Lyell Centre, Research Avenue South | |
| Postal code | EH14 4AP | |
| City | Edinburgh | |
| Country | UK | |
| enquiries@bgs.ac.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | British Geological Survey (BGS) | |
| Phone | +44 (0)131 667 1000 | |
| Fax | +44 (0)131 668 4140 | |
| Delivery point | The Lyell Centre, Research Avenue South | |
| Postal code | EH14 4AP | |
| City | Edinburgh | |
| Country | UK | |
| offshoredata@bgs.ac.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | http://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=1992/2 |
| Locator name | Name of the web resource | BGS Offshore Geoindex |
| Locator function | Code that describes the function of the resource. ISO function code chosen from ISO 19115-1 Codelist | search |
| Dataset constraints | ||
| 20 Limitations on Public Access - Access constraints | otherRestrictions | |
| 21 Conditions for Access and Use - Use limitation | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | unrestricted use, copyright acknowledgement - Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced British Geological Survey materials "Contains British Geological Survey materials ©UKRI [year]" |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 1992-07-06 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-04-17 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery Metadata Standard |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | Version 2.3.5 |