Syn- to post-rift transitions on passive margins: The case of the western Iberian margin (NE Atlantic)
A comprehensive set of 2D seismic reflection lines, borehole data from Industry wells, stratigraphic information from key outcrops, and published DSDP/ODP data, was used in the analysis of syn-to post-rift transitions offshore West Iberia, Northeast Atlantic. Continental break-up in Southwest Iberia...
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:73807 2023-05-15T17:41:30+02:00 Syn- to post-rift transitions on passive margins: The case of the western Iberian margin (NE Atlantic) Soares, Duarte Alves, Tiago Reis, R. P. Pimentel, N. 2010 https://orca.cardiff.ac.uk/id/eprint/73807/ unknown Metodo Directo Soares, Duarte https://orca.cardiff.ac.uk/view/cardiffauthors/A172289W.html and Alves, Tiago https://orca.cardiff.ac.uk/view/cardiffauthors/A106896T.html orcid:0000-0002-2765-3760 orcid:0000-0002-2765-3760 2010. Syn- to post-rift transitions on passive margins: The case of the western Iberian margin (NE Atlantic). Presented at: II Central & North Atlantic Conjugate Margins Conference, Lisbon, 2010. Published in: Reis, R. P. and Pimentel, N. eds. II Central & North Atlantic Conjugate Margins Conference. Metodo Directo Conference or Workshop Item PeerReviewed 2010 ftunivcardiff 2022-11-03T23:32:59Z A comprehensive set of 2D seismic reflection lines, borehole data from Industry wells, stratigraphic information from key outcrops, and published DSDP/ODP data, was used in the analysis of syn-to post-rift transitions offshore West Iberia, Northeast Atlantic. Continental break-up in Southwest Iberia resulted in the sudden influx of siliciclastic material in onshore and shallow-offshore basins, interpreted to represent a forced regression (FRST) which was accompanied by: a) westward tilting of the proximal margin, which sourced westward-prograding units; b) complete abandonment of syn-rift depocentres, which were blanketed by post-rift successions. However, differences between the southern and northern sectors of West Iberia are observed, most likely reflecting changes in the geological processes that led to continental break-up. Thus, regions where continental break-up occurred relatively close to the rift-shoulder areas show widespread regional hiatuses and an abrupt shallowing of sedimentary facies across the break-up unconformity. Also, areas where break-up occurred closer to the rift-shoulder should contain the larger thickness of syn- and post-rift reservoirs, a character reflecting shorter distances between sediment source areas and adjacent depocentres on the continental margin. In contrast, deep-offshore regions will have diachronous break-up unconformities and will materialise different sedimentary responses that will depend on relative accommodation space, sediment influx and sediment capture by topographic features inherited from the syn-rift stages. Conference Object Northeast Atlantic Cardiff University: ORCA (Online Research @ Cardiff) Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) |
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Cardiff University: ORCA (Online Research @ Cardiff) |
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ftunivcardiff |
language |
unknown |
description |
A comprehensive set of 2D seismic reflection lines, borehole data from Industry wells, stratigraphic information from key outcrops, and published DSDP/ODP data, was used in the analysis of syn-to post-rift transitions offshore West Iberia, Northeast Atlantic. Continental break-up in Southwest Iberia resulted in the sudden influx of siliciclastic material in onshore and shallow-offshore basins, interpreted to represent a forced regression (FRST) which was accompanied by: a) westward tilting of the proximal margin, which sourced westward-prograding units; b) complete abandonment of syn-rift depocentres, which were blanketed by post-rift successions. However, differences between the southern and northern sectors of West Iberia are observed, most likely reflecting changes in the geological processes that led to continental break-up. Thus, regions where continental break-up occurred relatively close to the rift-shoulder areas show widespread regional hiatuses and an abrupt shallowing of sedimentary facies across the break-up unconformity. Also, areas where break-up occurred closer to the rift-shoulder should contain the larger thickness of syn- and post-rift reservoirs, a character reflecting shorter distances between sediment source areas and adjacent depocentres on the continental margin. In contrast, deep-offshore regions will have diachronous break-up unconformities and will materialise different sedimentary responses that will depend on relative accommodation space, sediment influx and sediment capture by topographic features inherited from the syn-rift stages. |
author2 |
Reis, R. P. Pimentel, N. |
format |
Conference Object |
author |
Soares, Duarte Alves, Tiago |
spellingShingle |
Soares, Duarte Alves, Tiago Syn- to post-rift transitions on passive margins: The case of the western Iberian margin (NE Atlantic) |
author_facet |
Soares, Duarte Alves, Tiago |
author_sort |
Soares, Duarte |
title |
Syn- to post-rift transitions on passive margins: The case of the western Iberian margin (NE Atlantic) |
title_short |
Syn- to post-rift transitions on passive margins: The case of the western Iberian margin (NE Atlantic) |
title_full |
Syn- to post-rift transitions on passive margins: The case of the western Iberian margin (NE Atlantic) |
title_fullStr |
Syn- to post-rift transitions on passive margins: The case of the western Iberian margin (NE Atlantic) |
title_full_unstemmed |
Syn- to post-rift transitions on passive margins: The case of the western Iberian margin (NE Atlantic) |
title_sort |
syn- to post-rift transitions on passive margins: the case of the western iberian margin (ne atlantic) |
publisher |
Metodo Directo |
publishDate |
2010 |
url |
https://orca.cardiff.ac.uk/id/eprint/73807/ |
long_lat |
ENVELOPE(-54.065,-54.065,49.700,49.700) |
geographic |
Tilting |
geographic_facet |
Tilting |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
Soares, Duarte https://orca.cardiff.ac.uk/view/cardiffauthors/A172289W.html and Alves, Tiago https://orca.cardiff.ac.uk/view/cardiffauthors/A106896T.html orcid:0000-0002-2765-3760 orcid:0000-0002-2765-3760 2010. Syn- to post-rift transitions on passive margins: The case of the western Iberian margin (NE Atlantic). Presented at: II Central & North Atlantic Conjugate Margins Conference, Lisbon, 2010. Published in: Reis, R. P. and Pimentel, N. eds. II Central & North Atlantic Conjugate Margins Conference. Metodo Directo |
_version_ |
1766143094280945664 |