Rockall Consortium (RCK) Geophysical Survey 1992/1_RCK: Northern Rockall Trough and surrounding shallow water areas (10/05/1992 to 04/07/1992)

This marine geophysical survey took place from 03/05/1992 – 10/07/1992 in the Rockall Continental Margin on board the Kommandor Michael. The survey was carried out by the British Geological Survey (BGS). The aim of the survey was to investigate the shallow seismic structure along the eastern margin of the Rockall Bank, Northern Rockall Trough and adjacent banks. Sub bottom seismic profiling data were collected using Airgun, Sparker and Deep Tow Boomer systems. Gravity and Magnetic data were also acquired. These data are archived by BGS. Technical details of the survey are contained in BGS Technical Report WB/92/20C. Brett, CP and Dobinson, A. 1992. Rockall Continental Margin Project. Operations Report. GeoIndex Offshore - https://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=1992/1_RCK.

Simple

Date (Publication)
1992-07-10
Citation identifier
British Geological Survey / BGS_CMD_REF256
Point of contact
Organisation name Individual name Electronic mail address Role

British Geological Survey (BGS)

enquiries@bgs.ac.uk

Custodian

Rockall Consortium

offshoredata@bgs.ac.uk

Originator
Maintenance and update frequency
Not planned
Keywords

GEMET - INSPIRE themes, version 1.0

SeaVoX Vertical Co-ordinate Coverages (L131)

SeaDataNet Parameter Discovery Vocabulary (P021)
Access constraints
Other restrictions
Access constraints
No restrictions, a copyright acknowledgement is required and permission from any third party for the release of the data has been obtained. Inclusion of any third party data will determine the copyright acknowledgement that needs to be made.
Use constraints
Other restrictions
Other constraints

The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Use limitation

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]"

Spatial representation type
Grid
Distance
5  urn:ogc:def:uom:EPSG::9001
Language
English
Topic category
  • Geoscientific information
Geographic identifier
McCallien

BGS Gazetteer 2024-12-05 revision

Geographic identifier
Hebrides Terrace

BGS Gazetteer 2024-12-05 revision

Geographic identifier
Peach

BGS Gazetteer 2024-12-05 revision

Geographic identifier
Rockall Island

BGS Gazetteer 2024-12-05 revision

Geographic identifier
Anton Dohrn

BGS Gazetteer 2024-12-05 revision

Geographic identifier
St Kilda

BGS Gazetteer 2024-12-05 revision

Geographic identifier
George Bligh Bank

BGS Gazetteer 2024-12-05 revision

Geographic identifier
Harker

BGS Gazetteer 2024-12-05 revision

Geographic identifier
Geikie

BGS Gazetteer 2024-12-05 revision

Geographic identifier
Kennedy

BGS Gazetteer 2024-12-05 revision

Geographic identifier
Rosemary Bank

BGS Gazetteer 2024-12-05 revision

Geographic identifier
Darwin

BGS Gazetteer 2024-12-05 revision

Geographic identifier
North Rockall Basin

BGS Gazetteer 2024-12-05 revision

Geographic identifier
North Hatton

BGS Gazetteer 2024-12-05 revision

Geographic identifier
Central Rockall Basin

BGS Gazetteer 2024-12-05 revision

Geographic identifier
Central Hatton

BGS Gazetteer 2024-12-05 revision

Geographic identifier
Scottish Continental Shelf

Charting Progress 2: Regional Sea Boundaries 2009-06-18 creation

Geographic identifier
Atlantic North-West Approaches, Rockall Trough and Faeroe/Shetland Channel

Charting Progress 2: Regional Sea Boundaries 2009-06-18 creation

Geographic identifier
NORTHEAST ATLANTIC OCEAN (40W)

The SeaVoX Salt and Fresh Water Body Gazetteer: Sub-Ocean Category 1954-01-01 creation

N
S
E
W
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Begin date
1992-05-03
End date
1992-07-10
Reference system identifier
OGP / urn:ogc:def:crs:EPSG::4326

www.epsg.org 2005 revision

Distribution format
    Distributor contact
    Organisation name Individual name Electronic mail address Role

    British Geological Survey (BGS)

    enquiries@bgs.ac.uk

    		Distributor
    OnLine resource
    Protocol Linkage Name

    HTTP

         		http://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=1992/1_RCK

    BGS Offshore Geoindex
    Hierarchy level
    Dataset

    Conformance result

    Title

    INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of unknown theme
    Date (Publication)
    2011
    Explanation

    See the referenced specification
    Pass
    No
    Statement

    Geophysical equipment types used included: Airgun/Sleeve Gun, Deep Tow Boomer, Echo Sounder, Gravimeter, Magnetometer and Sparker. Sample equipment types used included: Grab. The survey was undertaken by Rockall Consortium. Airgun: Source: Cluster array of 4x40 cu in Bolt 600B airguns with wave shape kits, towed at a depth of 2 metres. Number of guns fired selectable but normally all 4 guns used over the majority of the area, reducing to 2 or 1 in the shallow water over the banks. Hydrophone: 24 channel Teledyne T178 with 2 active sections each 75 m in length with a group interval of 6.25m and a 50m stretch section. Channels were summed in groups of 4 to give 6x25m channels. Without active depth controllers the tow depth varied in the range 3.5 to 5m, depending on conditions. Back-up 30m Geomecanique single channel, used on lines 1-3. Sparker: Source: EG&G 9 x multitip array powered by two 232A power supplies and two 231A triggered capacitor banks. Normal operating power was 2000J and firing rate varied from 1 to 3 times during the 10 sec airgun cycle, depending on water depth. Hydrophone: 30m Geomecanique single channel. Deep Tow Boomer: Source: BGS developed deep towed fish based on a Huntec boomer plate. Normal operating power 0.5 kJ to a tow depth of 800m. Hydrophone: short, lm, multi-element array towed behind the fish. Gravity: La Coste and Romberg S75 air-sea gravity meter updated to incorporate a minicomputer for system control and logging of data. Also outputs data to the Qubit Trac IV logging system. Harbour base ties provided using a Worden land meter. Preliminary data reduction was carried out using the BGS PC based processing package to produce crossover errors for data quality control. Magnetics: Barringer M123 marine proton magnetometer with two pen analogue recorder. Data also output digitally to the Qubit Trac IV logging system. Bathymetry: Atlas Deso 20 with narrow beam deep water 33kHz transducer rated to 2200m. Data also output digitally to the Qubit Trac IV logging system. In deep water the first airgun return was digitised to give a depth input to the logging system. Positioning System: VERIPOS differential GPS system hired from Brown and Root Survey. The system was based on a 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 positon to the Qubit Trac IV logging system. Correction data was received from shore stations at Wick, Brest (both part of the established VERIPOS network) and Barra. The latter station was set up specifically for this survey but, because of radio licencing difficulties, did not come online until the early part of Leg 2. Two completely independent VERIPOS receivers were operated simultaneously giving 100% back-up. Data Logging System: Qubit Trac IV navigation processor/logger. Using position information input from the VERIPOS system the Qubit systempr oduced navigation information, helmsman display, track plotting and fix outputs to all survey recorders, whilst logging navigation and geophysical survey data at one minute intervals to magtape. Preliminary processing of the logged data was carried out using the BGS PC based processing package for data quality control. For more information see the Cruise Report and associated documentation where available. .

    Metadata

    File identifier
    abc9f747-53a0-0f38-e044-0003ba9b0d98 XML
    Metadata language
    English
    Hierarchy level
    Dataset
    Date stamp
    2024-12-05
    Metadata standard name

    MEDIN Discovery Metadata Standard
    Metadata standard version

    Version 2.3.5
    Metadata author
    Organisation name Individual name Electronic mail address Role

    British Geological Survey (BGS)

    enquiries@bgs.ac.uk

    		Point of contact
     
     

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    Keywords



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