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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/226253
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T10:09:53Zoai: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:34982025-09-29 10:09:53.555CONICET 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 |
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info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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British Sedimentological Research Group |
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British Sedimentological Research Group |
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