2024-03-28T19:23:46Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1977832022-11-22T10:32:55Zcom_10261_123com_10261_8col_10261_376
00925njm 22002777a 4500
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Llave, Estefanía
author
Hernández-Molina, Francisco J.
author
García, Marga
author
Ercilla, Gemma
author
Roque, Cristina
author
Juan, Carmen
author
Mena, Anxo
author
Preu, Benedict
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Van Rooij, D.
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Rebesco, Michele
author
Brackenridge, Rachel E.
author
Jane, G.
author
Gomez-Ballesteros, María
author
Stow, D. A. V.
author
2020
This work uses seismic records to document and classify contourite features around the Iberian continental margin to determine their implications for depositional systems and petroleum exploration. Contourites include depositional features (separated, sheeted, plastered and confined drifts), erosional features (abraded surfaces, channels, furrows and moats) and mixed features (contourite terraces). Drifts generally show high- to moderate-amplitude reflectors, which are cyclically intercalated with transparent layers. Transparent layers may represent finer-grained deposits, which can serve as seal rocks. High-amplitude reflectors (HARs) are likely to represent sandier layers, which could form hydrocarbon reservoirs. HARs occur on erosive features (moats and channels), and are clearly developed on contourite terraces and overflow features. Most of the contourite features described here are influenced by Mediterranean water masses throughout their Pliocene and Quaternary history. They specifically record Mediterranean Outflow Water, following its exit through the Gibraltar Strait. This work gives a detailed report on the variation of modern contourite deposits, which can help inform ancient contourite reservoir interpretation. Further research correlating 2D and 3D seismic anomalies with core and well-logging data is needed to develop better diagnostic criteria for contourites. This can help to clarify the role of contourites in petroleum systems
Passive Margins: Tectonics, Sedimentation and Magmatism: 403-436 (2020)
Geological Society Special Publications 476: 403-436 (2020)
http://hdl.handle.net/10261/197783
10.1144/SP476-2017-46
http://dx.doi.org/10.13039/501100003329
Contourites along the Iberian continental margins: conceptual and economic implications