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Along-slope oceanographic processes and sedimentary products around the Iberian margin

Francisco Javier Hernández-Molina, Nuno Serra, Dorik AV Stow, Estefanía Llave, Gemma Ercilla and David Van Rooij UGent (2011) GEO-MARINE LETTERS. 31(5-6). p.315-341
abstract
This contribution to this special volume represents the first attempt to comprehensively describe regional contourite (along-slope) processes and their sedimentary impacts around the Iberian margin, combining numerically simulated bottom currents with existing knowledge of contourite depositional and erosional features. The circulation of water masses is correlated with major contourite depositional systems (CDSs), and potential areas where new CDSs could be found are identified. Water-mass circulation leads to the development of along-slope currents which, in turn, generate contourite features comprising individual contourite drifts and erosional elements forming extensive, complex CDSs of considerable thickness in various geological settings. The regionally simulated bottom-current velocities reveal the strong impact of these water masses on the seafloor, especially in two principal areas: (1) the continental slopes of the Alboran Sea and the Atlantic Iberian margins, and (2) the abyssal plains in the Western Mediterranean and eastern Atlantic. Contourite processes at this scale are associated mainly with the Western Mediterranean Deep Water and the Levantine Intermediate Water in the Alboran Sea, and with both the Mediterranean Outflow Water and the Lower Deep Water in the Atlantic. Deep gateways are essential in controlling water-mass exchange between the abyssal plains, and thereby bottom-current velocities and pathways. Seamounts represent important obstacles for water-mass circulation, and high bottom-current velocities are predicted around their flanks, too. Based on these findings and those of a selected literature review, including less easily accessible "grey literature" such as theses and internal reports, it is clear that the role of bottom currents in shaping continental margins and abyssal plains has to date been generally underestimated, and that many may harbour contourite systems which still remain unexplored today. CDSs incorporate valuable sedimentary records of Iberian margin geological evolution, and further study seems promising in terms of not only stratigraphic, sedimentological, palaeoceanographic and palaeoclimatological research but also possible deep marine geohabitats and/or mineral and energy resources.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
EASTERN NORTH-ATLANTIC, CONTOURITE DEPOSITIONAL SYSTEM, WESTERN ALBORAN SEA, MESSINIAN SALINITY CRISIS, BOTTOM CURRENT ACTIVITY, SIDE-SCAN SONAR, CONTINENTAL-MARGIN, NEPHELOID LAYERS, BENTHIC FORAMINIFERA, MEDITERRANEAN OUTFLOW WATER
journal title
GEO-MARINE LETTERS
Geo-Mar. Lett.
volume
31
issue
5-6
issue title
Contributions from the international congress Deep-water circulation: processes & products
pages
315 - 341
conference name
International congress on Deep-Water Circulation: Processes and Products
conference location
Baiona, Spain
conference start
2010-06-16
conference end
2010-06-18
Web of Science type
Article; Proceedings Paper
Web of Science id
000297729200003
JCR category
GEOSCIENCES, MULTIDISCIPLINARY
JCR impact factor
1.472 (2011)
JCR rank
75/170 (2011)
JCR quartile
2 (2011)
ISSN
0276-0460
DOI
10.1007/s00367-011-0242-2
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1870490
handle
http://hdl.handle.net/1854/LU-1870490
date created
2011-08-08 13:55:26
date last changed
2012-10-19 13:05:48
@article{1870490,
  abstract     = {This contribution to this special volume represents the first attempt to comprehensively describe regional contourite (along-slope) processes and their sedimentary impacts around the Iberian margin, combining numerically simulated bottom currents with existing knowledge of contourite depositional and erosional features. The circulation of water masses is correlated with major contourite depositional systems (CDSs), and potential areas where new CDSs could be found are identified. Water-mass circulation leads to the development of along-slope currents which, in turn, generate contourite features comprising individual contourite drifts and erosional elements forming extensive, complex CDSs of considerable thickness in various geological settings. The regionally simulated bottom-current velocities reveal the strong impact of these water masses on the seafloor, especially in two principal areas: (1) the continental slopes of the Alboran Sea and the Atlantic Iberian margins, and (2) the abyssal plains in the Western Mediterranean and eastern Atlantic. Contourite processes at this scale are associated mainly with the Western Mediterranean Deep Water and the Levantine Intermediate Water in the Alboran Sea, and with both the Mediterranean Outflow Water and the Lower Deep Water in the Atlantic. Deep gateways are essential in controlling water-mass exchange between the abyssal plains, and thereby bottom-current velocities and pathways. Seamounts represent important obstacles for water-mass circulation, and high bottom-current velocities are predicted around their flanks, too. Based on these findings and those of a selected literature review, including less easily accessible {\textacutedbl}grey literature{\textacutedbl} such as theses and internal reports, it is clear that the role of bottom currents in shaping continental margins and abyssal plains has to date been generally underestimated, and that many may harbour contourite systems which still remain unexplored today. CDSs incorporate valuable sedimentary records of Iberian margin geological evolution, and further study seems promising in terms of not only stratigraphic, sedimentological, palaeoceanographic and palaeoclimatological research but also possible deep marine geohabitats and/or mineral and energy resources.},
  author       = {Hern{\'a}ndez-Molina, Francisco Javier and Serra, Nuno and Stow, Dorik AV and Llave, Estefan{\'i}a and Ercilla, Gemma and Van Rooij, David},
  issn         = {0276-0460},
  journal      = {GEO-MARINE LETTERS},
  keyword      = {EASTERN NORTH-ATLANTIC,CONTOURITE DEPOSITIONAL SYSTEM,WESTERN ALBORAN SEA,MESSINIAN SALINITY CRISIS,BOTTOM CURRENT ACTIVITY,SIDE-SCAN SONAR,CONTINENTAL-MARGIN,NEPHELOID LAYERS,BENTHIC FORAMINIFERA,MEDITERRANEAN OUTFLOW WATER},
  language     = {eng},
  location     = {Baiona, Spain},
  number       = {5-6},
  pages        = {315--341},
  title        = {Along-slope oceanographic processes and sedimentary products around the Iberian margin},
  url          = {http://dx.doi.org/10.1007/s00367-011-0242-2},
  volume       = {31},
  year         = {2011},
}

Chicago
Hernández-Molina, Francisco Javier, Nuno Serra, Dorik AV Stow, Estefanía Llave, Gemma Ercilla, and David Van Rooij. 2011. “Along-slope Oceanographic Processes and Sedimentary Products Around the Iberian Margin.” Geo-marine Letters 31 (5-6): 315–341.
APA
Hernández-Molina, Francisco Javier, Serra, N., Stow, D. A., Llave, E., Ercilla, G., & Van Rooij, D. (2011). Along-slope oceanographic processes and sedimentary products around the Iberian margin. GEO-MARINE LETTERS, 31(5-6), 315–341. Presented at the International congress on Deep-Water Circulation: Processes and Products.
Vancouver
1.
Hernández-Molina FJ, Serra N, Stow DA, Llave E, Ercilla G, Van Rooij D. Along-slope oceanographic processes and sedimentary products around the Iberian margin. GEO-MARINE LETTERS. 2011;31(5-6):315–41.
MLA
Hernández-Molina, Francisco Javier, Nuno Serra, Dorik AV Stow, et al. “Along-slope Oceanographic Processes and Sedimentary Products Around the Iberian Margin.” GEO-MARINE LETTERS 31.5-6 (2011): 315–341. Print.