Substrate entrainment, depositional relief, and sediment capture: Impact of a submarine landslide on flow process and sediment supply

Autores
Martínez Doñate, A.; Privat, A.M.L.J.; Hodgson, D.M.; Jackson, C.A.L.; Kane, I.A.; Spychala, Y.T.; Duller, R.A.; Stevenson, C.; Keavney, E.; Schwarz, Ernesto; Flint, S.S.
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Fil: Martínez Doñate, A.. University of Manchester; Reino Unido
Fil: Privat, A.M.L.J.. University of Leeds; Reino Unido
Fil: Hodgson, D.M.. University of Leeds; Reino Unido
Fil: Jackson, C.A.L.. Imperial College London; Reino Unido
Fil: Kane, I.A.. University of Manchester; Reino Unido
Fil: Spychala, Y.T.. Leibniz Universitat Hannover; Alemania
Fil: Duller, R.A.. University of Liverpool; Reino Unido
Fil: Stevenson, C.. University of Liverpool; Reino Unido
Fil: Keavney, E.. University of Leeds; Reino Unido
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
Fil: Flint, S.S.. University of Manchester; Reino Unido
Materia
CONFINEMENT
DYNAMIC TOPOGRAPHY
FOUNDERING
NEUQUÉN BASIN (ARGENTINA)
SUBMARINE LANDSLIDE DEPOSITS
SUBMARINE LOBE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/148881

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spelling Substrate entrainment, depositional relief, and sediment capture: Impact of a submarine landslide on flow process and sediment supplyMartínez Doñate, A.Privat, A.M.L.J.Hodgson, D.M.Jackson, C.A.L.Kane, I.A.Spychala, Y.T.Duller, R.A.Stevenson, C.Keavney, E.Schwarz, ErnestoFlint, S.S.CONFINEMENTDYNAMIC TOPOGRAPHYFOUNDERINGNEUQUÉN BASIN (ARGENTINA)SUBMARINE LANDSLIDE DEPOSITSSUBMARINE LOBEhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Submarine 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.Fil: Martínez Doñate, A.. University of Manchester; Reino UnidoFil: Privat, A.M.L.J.. University of Leeds; Reino UnidoFil: Hodgson, D.M.. University of Leeds; Reino UnidoFil: Jackson, C.A.L.. Imperial College London; Reino UnidoFil: Kane, I.A.. University of Manchester; Reino UnidoFil: Spychala, Y.T.. Leibniz Universitat Hannover; AlemaniaFil: Duller, R.A.. University of Liverpool; Reino UnidoFil: Stevenson, C.. University of Liverpool; Reino UnidoFil: Keavney, E.. University of Leeds; Reino UnidoFil: 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; ArgentinaFil: Flint, S.S.. University of Manchester; Reino UnidoFrontiers Media2021-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/148881Martínez 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; 1-232296-6463CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3389/feart.2021.757617info:eu-repo/semantics/altIdentifier/url/https://www.frontiersin.org/articles/10.3389/feart.2021.757617/fullinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:32:29Zoai:ri.conicet.gov.ar:11336/148881instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:32:29.982CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Substrate entrainment, depositional relief, and sediment capture: Impact of a submarine landslide on flow process and sediment supply
title Substrate entrainment, depositional relief, and sediment capture: Impact of a submarine landslide on flow process and sediment supply
spellingShingle Substrate entrainment, depositional relief, and sediment capture: Impact of a submarine landslide on flow process and sediment supply
Martínez Doñate, A.
CONFINEMENT
DYNAMIC TOPOGRAPHY
FOUNDERING
NEUQUÉN BASIN (ARGENTINA)
SUBMARINE LANDSLIDE DEPOSITS
SUBMARINE LOBE
title_short Substrate entrainment, depositional relief, and sediment capture: Impact of a submarine landslide on flow process and sediment supply
title_full Substrate entrainment, depositional relief, and sediment capture: Impact of a submarine landslide on flow process and sediment supply
title_fullStr Substrate entrainment, depositional relief, and sediment capture: Impact of a submarine landslide on flow process and sediment supply
title_full_unstemmed Substrate entrainment, depositional relief, and sediment capture: Impact of a submarine landslide on flow process and sediment supply
title_sort Substrate entrainment, depositional relief, and sediment capture: Impact of a submarine landslide on flow process and sediment supply
dc.creator.none.fl_str_mv Martínez Doñate, A.
Privat, A.M.L.J.
Hodgson, D.M.
Jackson, C.A.L.
Kane, I.A.
Spychala, Y.T.
Duller, R.A.
Stevenson, C.
Keavney, E.
Schwarz, Ernesto
Flint, S.S.
author Martínez Doñate, A.
author_facet Martínez Doñate, A.
Privat, A.M.L.J.
Hodgson, D.M.
Jackson, C.A.L.
Kane, I.A.
Spychala, Y.T.
Duller, R.A.
Stevenson, C.
Keavney, E.
Schwarz, Ernesto
Flint, S.S.
author_role author
author2 Privat, A.M.L.J.
Hodgson, D.M.
Jackson, C.A.L.
Kane, I.A.
Spychala, Y.T.
Duller, R.A.
Stevenson, C.
Keavney, E.
Schwarz, Ernesto
Flint, S.S.
author2_role author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv CONFINEMENT
DYNAMIC TOPOGRAPHY
FOUNDERING
NEUQUÉN BASIN (ARGENTINA)
SUBMARINE LANDSLIDE DEPOSITS
SUBMARINE LOBE
topic CONFINEMENT
DYNAMIC TOPOGRAPHY
FOUNDERING
NEUQUÉN BASIN (ARGENTINA)
SUBMARINE LANDSLIDE DEPOSITS
SUBMARINE LOBE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv 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.
Fil: Martínez Doñate, A.. University of Manchester; Reino Unido
Fil: Privat, A.M.L.J.. University of Leeds; Reino Unido
Fil: Hodgson, D.M.. University of Leeds; Reino Unido
Fil: Jackson, C.A.L.. Imperial College London; Reino Unido
Fil: Kane, I.A.. University of Manchester; Reino Unido
Fil: Spychala, Y.T.. Leibniz Universitat Hannover; Alemania
Fil: Duller, R.A.. University of Liverpool; Reino Unido
Fil: Stevenson, C.. University of Liverpool; Reino Unido
Fil: Keavney, E.. University of Leeds; Reino Unido
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
Fil: Flint, S.S.. University of Manchester; Reino Unido
description 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.
publishDate 2021
dc.date.none.fl_str_mv 2021-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/148881
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
2296-6463
CONICET Digital
CONICET
url http://hdl.handle.net/11336/148881
identifier_str_mv 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
2296-6463
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
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