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Contourite sedimentation in the Alboran Sea: morphosedimentary characterization

Authors: Ercilla, Gemma; Juan, Carmen; Estrada, Ferran; Casas, David; Alonso, Belén; García, Marga; Farran, Marcel-lí; +3 Authors

Contourite sedimentation in the Alboran Sea: morphosedimentary characterization

Abstract

[ES] En este trabajo se presenta una nueva visión de la sedimentación reciente en el Mar de Alborán, en base al análisis de la mayor base de datos con perfiles sísmicos disponibles en dicho mar. Los resultados obtenidos revelan que las contornitas representan el principal elemento morfosedimentario que caracteriza a los márgenes y las cuencas. Se han caracterizado varios tipos de elementos contorníticos deposicionales (crestas adosadas, laminares, elongadas-separadas, confinadas y de canal) y erosivos (fosas, terrazas y surcos). Estos elementos están interrumpidos por la construcción de abanicos turbidíticos, principalmente en el margen español, y por inestabilidades sedimentarias que afectan localmente al talud abierto, a la Dorsal de Alborán y a los altos morfológicos. Esta nueva visión morfosedimentaria del Mar de Alborán pone de manifiesto por primera vez el importante papel de los procesos sedimentarios longitudinales al margen (transporte, sedimentación y erosión) relacionados con las masas de agua mediterránea.

[EN] This paper presents a new view of recent sedimentation in the Alboran Sea, based on the analysis of the largest database of available seismic profiles in that sea. The results reveal that contourites represent the main morphosedimentary features that characterize the margins and basins. Several types of contourite features have been characterized, both depositional (plastered, sheeted, elongated-separated, confined, and channel-related) and erosive (moats, terraces and furrows). These elements are interrupted by the construction of turbidite fans, mainly in the Spanish margin, and by sedimentary instabilities that locally affect to the open slope, Alboran Ridge and morphological highs. This new morphosedimentary view of the Alboran Sea reveals for the first time the important role of along slope processes (transport, sedimentation and erosion) associated with Mediterranean water masses.

This work is in the framework of the CONTOURIBER (ref: CTM 2008-06399-C04-04/MAR), MONTERA (REF: CTM-14157-C02-02) projects and Action Marges Program, thanks to an important effort between national and international geologists working in the Alboran.

Gemma Ercilla ...et al. -- 4 páginas, 2 figuras. -- VIII Congreso Geológico de España, Oviedo.

Peer reviewed

Country
Spain
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Keywords

Masas de agua mediterránea, Geomorfología, Contourites, Abanico turbidítico, Turbiditic fans, Mediterranean water masses, Geomorphology, Contornitas, Mar de Alborán, Alboran Sea

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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