Interim report on the seabed environmental survey of
Angola Blocks 18 and 31 (MV Ocean Endeavour cruise 2005)
Interim report on the seabed environmental survey of
Angola Blocks 18 and 31 (MV Ocean Endeavour cruise 2005)
This report is based on initial (at sea) observations of the seabed environment and fauna of Angola Blocks 18 and 31 as assessed during the MV Ocean Endeavour environmental survey (13 Oct-06 Nov, 2005). The report draws on the appearance and other physical characteristics of core samples and on photographic observations of the seafloor from deployments of the NOCS WASP system and the BP ROBIO lander. The megabenthos and fish populations appear to be consistent with a quiescent, fine-sedimented, bathyal region. No living cold seep (or comparable) communities were encountered during the survey. However, site ME1 (Block 31, large pockmark) has cemented sediments, both within the sediment column and at the sediment surface, and the fragmented shell remains of what appear to be large cold seep mussels; an extant community may be present in this vicinity. Other bivalve molluscs (both living and dead) of possible chemosynthetic nature were recovered from other sites (Block 31, on the periphery of diapiric features).
Should you wish to consult or cite this report please contact the author directly (Brian Bett, bjb@noc.soton.ac.uk, +44 (0)23 80596355).
Angola, Angolan Margin, Baited time-lapse camera, Bathyal, Benthic communities, BP, Chemosynthetic communities, Continental slope, Megacorer, Photography, Pockmarks, ROBIO lander, Salt diapirs, SE Atlantic, Seabed, Sediments, Videotape recording, WASP
National Oceanography Centre
Bett, B.J.
61342990-13be-45ae-9f5c-9540114335d9
2 October 2007
Bett, B.J.
61342990-13be-45ae-9f5c-9540114335d9
Bett, B.J.
(2007)
Interim report on the seabed environmental survey of
Angola Blocks 18 and 31 (MV Ocean Endeavour cruise 2005)
(National Oceanography Centre Southampton Research and Consultancy Report, 28)
Southampton, UK.
National Oceanography Centre
14pp.
Record type:
Monograph
(Project Report)
Abstract
This report is based on initial (at sea) observations of the seabed environment and fauna of Angola Blocks 18 and 31 as assessed during the MV Ocean Endeavour environmental survey (13 Oct-06 Nov, 2005). The report draws on the appearance and other physical characteristics of core samples and on photographic observations of the seafloor from deployments of the NOCS WASP system and the BP ROBIO lander. The megabenthos and fish populations appear to be consistent with a quiescent, fine-sedimented, bathyal region. No living cold seep (or comparable) communities were encountered during the survey. However, site ME1 (Block 31, large pockmark) has cemented sediments, both within the sediment column and at the sediment surface, and the fragmented shell remains of what appear to be large cold seep mussels; an extant community may be present in this vicinity. Other bivalve molluscs (both living and dead) of possible chemosynthetic nature were recovered from other sites (Block 31, on the periphery of diapiric features).
Should you wish to consult or cite this report please contact the author directly (Brian Bett, bjb@noc.soton.ac.uk, +44 (0)23 80596355).
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More information
Published date: 2 October 2007
Additional Information:
Abstract deposited at the request of B.J.Bett. Any request to view the whole document should be directed to him - contact details included in abstract.
Keywords:
Angola, Angolan Margin, Baited time-lapse camera, Bathyal, Benthic communities, BP, Chemosynthetic communities, Continental slope, Megacorer, Photography, Pockmarks, ROBIO lander, Salt diapirs, SE Atlantic, Seabed, Sediments, Videotape recording, WASP
Identifiers
Local EPrints ID: 48593
URI: http://eprints.soton.ac.uk/id/eprint/48593
PURE UUID: 17f70f17-aec4-4701-bf05-28725c7e1c4c
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Date deposited: 02 Oct 2007
Last modified: 04 Apr 2024 17:09
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Author:
B.J. Bett
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