Early post-rift facies and architectural changes within a coarse-grained deepwater system deposited above a Mass Transport Complex (MTC)

Autores
Privat, Aurélia; Hodgson, David M.; Jackson, Christopher A. L.; Schwarz, Ernesto; Peakall, Jeffrey
Año de publicación
2016
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Local gradient changes and variable accommodation characterize the upper surface of mass transport complexes (MTCs). Bathymetric variability can influence the longitudinal and vertical processes occurring within coarse-grained sediment gravity flows, which are challenging to interpret from the rock record alone. A 60 m thick succession of very coarse-grained and poorly-sorted matrix-rich sandstones deposited above a seismic-scale mass transport complex (MTC) is investigated in the Jurassic stratigraphy of the Los Molles Formation, Neuquén Basin. The facies types and architectural changes documented within the deep-water succession provide insights into the interactions between coarse-grained sediment gravity flows and uneven seabed inherited from the top of a MTC. The succession was deposited in the Chacay Melehue hemi-graben outcrops along a 6.5 km long oblique downdip longitudinal profile which permitted correlation of individual beds between 16 stratigraphic sections (1:25 scale). Two units are defined: Unit 1 comprises heterolithic facies grading upwards into poorly sorted, very coarse- to fine-grained, thin- to medium-bedded sandstones with abundant pebble-sized clasts; Unit 2 comprises three thick conglomeratic event beds of very poorly-sorted, granular to medium-grained mud-rich sandstone matrix, supporting polygenic gravels ranging from pebble to boulder and large clasts.The sandstone-rich division of the deep-water succession studied is interpreted as a lobe complex emplaced by an out-of-equilibrium sand-rich system, which recorded a progressive decrease of confinement from Unit 1 to Unit 2. The MTD-related topography controlled stratigraphic trapping of considerable sand volumes in Unit 1. Once the MTC-related accommodation was filled, relief associated with individual supra-MTC sandbodies produced subtle changes in depositional processes in the Unit 2. Predictive stratigraphic outcrop-based models can provide insights into spatial distribution and internal architecture of heterogeneous sandbodies able to generate multiscale net/gross variations that make-up the internal complexity of subsurface reservoirs hosted in lobes above MTCs.
Fil: Privat, Aurélia. University of Leeds; Reino Unido
Fil: Hodgson, David M.. University of Leeds; Reino Unido
Fil: Jackson, Christopher A. L.. Imperial College London; 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: Peakall, Jeffrey. University of Leeds; Reino Unido
British Sedimentological Reseach Group 55th Annual General Meeting
Cambridge
Reino Unido
British Sedimentological Reseach Group
Materia
EARLY POST-RIFT
DEEP-WATER FACIES
FLOW BEAHVIOUR
MTC
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:11336/226253
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Early post-rift facies and architectural changes within a coarse-grained deepwater system deposited above a Mass Transport Complex (MTC)Privat, AuréliaHodgson, David M.Jackson, Christopher A. L.Schwarz, ErnestoPeakall, JeffreyEARLY POST-RIFTDEEP-WATER FACIESFLOW BEAHVIOURMTChttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Local gradient changes and variable accommodation characterize the upper surface of mass transport complexes (MTCs). Bathymetric variability can influence the longitudinal and vertical processes occurring within coarse-grained sediment gravity flows, which are challenging to interpret from the rock record alone. A 60 m thick succession of very coarse-grained and poorly-sorted matrix-rich sandstones deposited above a seismic-scale mass transport complex (MTC) is investigated in the Jurassic stratigraphy of the Los Molles Formation, Neuquén Basin. The facies types and architectural changes documented within the deep-water succession provide insights into the interactions between coarse-grained sediment gravity flows and uneven seabed inherited from the top of a MTC. The succession was deposited in the Chacay Melehue hemi-graben outcrops along a 6.5 km long oblique downdip longitudinal profile which permitted correlation of individual beds between 16 stratigraphic sections (1:25 scale). Two units are defined: Unit 1 comprises heterolithic facies grading upwards into poorly sorted, very coarse- to fine-grained, thin- to medium-bedded sandstones with abundant pebble-sized clasts; Unit 2 comprises three thick conglomeratic event beds of very poorly-sorted, granular to medium-grained mud-rich sandstone matrix, supporting polygenic gravels ranging from pebble to boulder and large clasts.The sandstone-rich division of the deep-water succession studied is interpreted as a lobe complex emplaced by an out-of-equilibrium sand-rich system, which recorded a progressive decrease of confinement from Unit 1 to Unit 2. The MTD-related topography controlled stratigraphic trapping of considerable sand volumes in Unit 1. Once the MTC-related accommodation was filled, relief associated with individual supra-MTC sandbodies produced subtle changes in depositional processes in the Unit 2. Predictive stratigraphic outcrop-based models can provide insights into spatial distribution and internal architecture of heterogeneous sandbodies able to generate multiscale net/gross variations that make-up the internal complexity of subsurface reservoirs hosted in lobes above MTCs.Fil: Privat, Aurélia. University of Leeds; Reino UnidoFil: Hodgson, David M.. University of Leeds; Reino UnidoFil: Jackson, Christopher A. L.. Imperial College London; 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: Peakall, Jeffrey. University of Leeds; Reino UnidoBritish Sedimentological Reseach Group 55th Annual General MeetingCambridgeReino UnidoBritish Sedimentological Reseach GroupBritish Sedimentological Research Group2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/226253Early post-rift facies and architectural changes within a coarse-grained deepwater system deposited above a Mass Transport Complex (MTC); British Sedimentological Reseach Group 55th Annual General Meeting; Cambridge; Reino Unido; 2016; 53-53CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.bsrg.org.uk/meetings_agms_reviews/files2016/BSRG2016_Abstracts_Volume.pdfinfo:eu-repo/semantics/altIdentifier/url/https://www.bsrg.org.uk/meetings_agm.htmlInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:39:49Zoai:ri.conicet.gov.ar:11336/226253instacron: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:34982025-10-22 11:39:49.646CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Early post-rift facies and architectural changes within a coarse-grained deepwater system deposited above a Mass Transport Complex (MTC)
title Early post-rift facies and architectural changes within a coarse-grained deepwater system deposited above a Mass Transport Complex (MTC)
spellingShingle Early post-rift facies and architectural changes within a coarse-grained deepwater system deposited above a Mass Transport Complex (MTC)
Privat, Aurélia
EARLY POST-RIFT
DEEP-WATER FACIES
FLOW BEAHVIOUR
MTC
title_short Early post-rift facies and architectural changes within a coarse-grained deepwater system deposited above a Mass Transport Complex (MTC)
title_full Early post-rift facies and architectural changes within a coarse-grained deepwater system deposited above a Mass Transport Complex (MTC)
title_fullStr Early post-rift facies and architectural changes within a coarse-grained deepwater system deposited above a Mass Transport Complex (MTC)
title_full_unstemmed Early post-rift facies and architectural changes within a coarse-grained deepwater system deposited above a Mass Transport Complex (MTC)
title_sort Early post-rift facies and architectural changes within a coarse-grained deepwater system deposited above a Mass Transport Complex (MTC)
dc.creator.none.fl_str_mv Privat, Aurélia
Hodgson, David M.
Jackson, Christopher A. L.
Schwarz, Ernesto
Peakall, Jeffrey
author Privat, Aurélia
author_facet Privat, Aurélia
Hodgson, David M.
Jackson, Christopher A. L.
Schwarz, Ernesto
Peakall, Jeffrey
author_role author
author2 Hodgson, David M.
Jackson, Christopher A. L.
Schwarz, Ernesto
Peakall, Jeffrey
author2_role author
author
author
author
dc.subject.none.fl_str_mv EARLY POST-RIFT
DEEP-WATER FACIES
FLOW BEAHVIOUR
MTC
topic EARLY POST-RIFT
DEEP-WATER FACIES
FLOW BEAHVIOUR
MTC
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Local gradient changes and variable accommodation characterize the upper surface of mass transport complexes (MTCs). Bathymetric variability can influence the longitudinal and vertical processes occurring within coarse-grained sediment gravity flows, which are challenging to interpret from the rock record alone. A 60 m thick succession of very coarse-grained and poorly-sorted matrix-rich sandstones deposited above a seismic-scale mass transport complex (MTC) is investigated in the Jurassic stratigraphy of the Los Molles Formation, Neuquén Basin. The facies types and architectural changes documented within the deep-water succession provide insights into the interactions between coarse-grained sediment gravity flows and uneven seabed inherited from the top of a MTC. The succession was deposited in the Chacay Melehue hemi-graben outcrops along a 6.5 km long oblique downdip longitudinal profile which permitted correlation of individual beds between 16 stratigraphic sections (1:25 scale). Two units are defined: Unit 1 comprises heterolithic facies grading upwards into poorly sorted, very coarse- to fine-grained, thin- to medium-bedded sandstones with abundant pebble-sized clasts; Unit 2 comprises three thick conglomeratic event beds of very poorly-sorted, granular to medium-grained mud-rich sandstone matrix, supporting polygenic gravels ranging from pebble to boulder and large clasts.The sandstone-rich division of the deep-water succession studied is interpreted as a lobe complex emplaced by an out-of-equilibrium sand-rich system, which recorded a progressive decrease of confinement from Unit 1 to Unit 2. The MTD-related topography controlled stratigraphic trapping of considerable sand volumes in Unit 1. Once the MTC-related accommodation was filled, relief associated with individual supra-MTC sandbodies produced subtle changes in depositional processes in the Unit 2. Predictive stratigraphic outcrop-based models can provide insights into spatial distribution and internal architecture of heterogeneous sandbodies able to generate multiscale net/gross variations that make-up the internal complexity of subsurface reservoirs hosted in lobes above MTCs.
Fil: Privat, Aurélia. University of Leeds; Reino Unido
Fil: Hodgson, David M.. University of Leeds; Reino Unido
Fil: Jackson, Christopher A. L.. Imperial College London; 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: Peakall, Jeffrey. University of Leeds; Reino Unido
British Sedimentological Reseach Group 55th Annual General Meeting
Cambridge
Reino Unido
British Sedimentological Reseach Group
description Local gradient changes and variable accommodation characterize the upper surface of mass transport complexes (MTCs). Bathymetric variability can influence the longitudinal and vertical processes occurring within coarse-grained sediment gravity flows, which are challenging to interpret from the rock record alone. A 60 m thick succession of very coarse-grained and poorly-sorted matrix-rich sandstones deposited above a seismic-scale mass transport complex (MTC) is investigated in the Jurassic stratigraphy of the Los Molles Formation, Neuquén Basin. The facies types and architectural changes documented within the deep-water succession provide insights into the interactions between coarse-grained sediment gravity flows and uneven seabed inherited from the top of a MTC. The succession was deposited in the Chacay Melehue hemi-graben outcrops along a 6.5 km long oblique downdip longitudinal profile which permitted correlation of individual beds between 16 stratigraphic sections (1:25 scale). Two units are defined: Unit 1 comprises heterolithic facies grading upwards into poorly sorted, very coarse- to fine-grained, thin- to medium-bedded sandstones with abundant pebble-sized clasts; Unit 2 comprises three thick conglomeratic event beds of very poorly-sorted, granular to medium-grained mud-rich sandstone matrix, supporting polygenic gravels ranging from pebble to boulder and large clasts.The sandstone-rich division of the deep-water succession studied is interpreted as a lobe complex emplaced by an out-of-equilibrium sand-rich system, which recorded a progressive decrease of confinement from Unit 1 to Unit 2. The MTD-related topography controlled stratigraphic trapping of considerable sand volumes in Unit 1. Once the MTC-related accommodation was filled, relief associated with individual supra-MTC sandbodies produced subtle changes in depositional processes in the Unit 2. Predictive stratigraphic outcrop-based models can provide insights into spatial distribution and internal architecture of heterogeneous sandbodies able to generate multiscale net/gross variations that make-up the internal complexity of subsurface reservoirs hosted in lobes above MTCs.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Reunión
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/226253
Early post-rift facies and architectural changes within a coarse-grained deepwater system deposited above a Mass Transport Complex (MTC); British Sedimentological Reseach Group 55th Annual General Meeting; Cambridge; Reino Unido; 2016; 53-53
CONICET Digital
CONICET
url http://hdl.handle.net/11336/226253
identifier_str_mv Early post-rift facies and architectural changes within a coarse-grained deepwater system deposited above a Mass Transport Complex (MTC); British Sedimentological Reseach Group 55th Annual General Meeting; Cambridge; Reino Unido; 2016; 53-53
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.bsrg.org.uk/meetings_agms_reviews/files2016/BSRG2016_Abstracts_Volume.pdf
info:eu-repo/semantics/altIdentifier/url/https://www.bsrg.org.uk/meetings_agm.html
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv British Sedimentological Research Group
publisher.none.fl_str_mv British Sedimentological Research Group
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reponame_str CONICET Digital (CONICET)
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repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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