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dc.contributor.author
Martínez Doñate, A.
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Privat, A.M.L.J.
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Hodgson, D.M.
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Jackson, C.A.L.
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Kane, I.A.
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Spychala, Y.T.
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Duller, R.A.
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Stevenson, C.
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Keavney, E.
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Schwarz, Ernesto
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dc.contributor.author
Flint, S.S.
dc.date.available
2021-12-16T15:00:18Z
dc.date.issued
2021-11
dc.identifier.citation
Martínez Doñate, A.; Privat, A.M.L.J.; Hodgson, D.M.; Jackson, C.A.L.; Kane, I.A.; et al.; Substrate entrainment, depositional relief, and sediment capture: Impact of a submarine landslide on flow process and sediment supply; Frontiers Media; Frontiers in Earth Science; 9; 11-2021; 1-23
dc.identifier.issn
2296-6463
dc.identifier.uri
http://hdl.handle.net/11336/148881
dc.description.abstract
Submarine landslides can generate complicated patterns of seafloor relief that influence subsequent flow behaviour and sediment dispersal patterns. In subsurface studies, the term mass transport deposits (MTDs) is commonly used and covers a range of processes and resultant deposits. While the large-scale morphology of submarine landslide deposits can be resolved in seismic reflection data, the nature of their upper surface and its impact on both facies distributions and stratal architecture of overlying deposits is rarely resolvable. However, field-based studies often allow a more detailed characterisation of the deposit. The early post-rift Middle Jurassic deep-water succession of the Los Molles Formation is exceptionally well-exposed along a dip-orientated WSW-ENE outcrop belt in the Chacay Melehue depocentre, Neuquén Basin, Argentina. We correlate 27 sedimentary logs constrained by marker beds to document the sedimentology and architecture of a >47 m thick and at least 9.6 km long debrite, which contains two different types of megaclasts. The debrite overlies ramps and steps, indicating erosion and substrate entrainment. Two distinct sandstone-dominated units overlie the debrite. The lower sandstone unit is characterised by: 1) abrupt thickness changes, wedging and progressive rotation of laminae in sandstone beds associated with growth strata; and 2) detached sandstone load balls within the underlying debrite. The combination of these features suggests syn-sedimentary foundering processes due to density instabilities at the top of the fluid-saturated mud-rich debrite. The debrite relief controlled the spatial distribution of foundered sandstones. The upper sandstone unit is characterised by thin-bedded deposits, locally overlain by medium-to thick-bedded lobe axis/off-axis deposits. The thin-beds show local thinning and onlapping onto the debrite, where it develops its highest relief. Facies distributions and stacking patterns record the progradation of submarine lobes and their complex interaction with long-lived debrite-related topography. The emplacement of a kilometre-scale debrite in an otherwise mud-rich basinal setting and accumulation of overlying sand-rich deposits suggests a genetic link between the mass-wasting event and transient coarse clastic sediment supply to an otherwise sand-starved part of the basin. Therefore, submarine landslides demonstrably impact the routing and behaviour of subsequent sediment gravity flows, which must be considered when predicting facies distributions and palaeoenvironments above MTDs in subsurface datasets.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Frontiers Media
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CONFINEMENT
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DYNAMIC TOPOGRAPHY
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FOUNDERING
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NEUQUÉN BASIN (ARGENTINA)
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SUBMARINE LANDSLIDE DEPOSITS
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SUBMARINE LOBE
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Geología
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Substrate entrainment, depositional relief, and sediment capture: Impact of a submarine landslide on flow process and sediment supply
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-12-13T20:41:12Z
dc.journal.volume
9
dc.journal.pagination
1-23
dc.journal.pais
Suiza
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dc.description.fil
Fil: Martínez Doñate, A.. University of Manchester; Reino Unido
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Fil: Privat, A.M.L.J.. University of Leeds; Reino Unido
dc.description.fil
Fil: Hodgson, D.M.. University of Leeds; Reino Unido
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Fil: Jackson, C.A.L.. Imperial College London; Reino Unido
dc.description.fil
Fil: Kane, I.A.. University of Manchester; Reino Unido
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Fil: Spychala, Y.T.. Leibniz Universitat Hannover; Alemania
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Fil: Duller, R.A.. University of Liverpool; Reino Unido
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Fil: Stevenson, C.. University of Liverpool; Reino Unido
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Fil: Keavney, E.. University of Leeds; Reino Unido
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Fil: Schwarz, Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.description.fil
Fil: Flint, S.S.. University of Manchester; Reino Unido
dc.journal.title
Frontiers in Earth Science
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.3389/feart.2021.757617
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.frontiersin.org/articles/10.3389/feart.2021.757617/full
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