Interaction of tidal and fluvial processes from delta front to coastal plain: Subsurface implications

Autores
Gugliotta, Marcello; Flint, Stephen; Hodgson, David M.; Veiga, Gonzalo Diego
Año de publicación
2014
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Deltas show a range of different morphologies, architectures, facies and grain size distributions. Although the interplay of external factors may contribute to this variety, a significant role is played by the interaction of fluvial and marine processes. Constraining the relative importance of fluvial, tidal and wave effects in an ancient deltaic system, is crucial to improve prediction of 3D depositional architecture and reservoir connectivity. This study provides an example from the Lajas Formation, which consists of middle Jurassic deltaic deposits that accumulated in the back-arc phase of the Neuquén Basin, Argentina. Sedimentological logging, correlation panel construction, architectural element and facies analysis were combined with statistical analysis of rhythmicity in stratal thicknesses, to evaluate the degree of tidal influence during deposition. Lower parts of 5-12 m thickening/coarsening upward packages (medial/distal mouth bars) show ripple-scale bimodal palaeocurrents associated with marine/brackish trace fossils. Upper parts of these packages (proximal mouth bars) show unidirectional river-dominated paleocurrents and rhythmically distributed carbonaceous drapes to cross-beds, indicating modulation by tidal process. Fining-up sandstone packages 3-5 m thick lack trace and body fossils, bimodal paleocurrents and rhythmically distributed carbonaceous drapes, and are interpreted as river-dominated distributary channel fills. Minor (0.5-2 m) thickening/coarsening upward packages are interpreted as interdistributary, marine-influenced bays filled by river-flood derived crevasse subdeltas. Mud drapes, rhythmical bundling and rare bimodal palaeocurrents indicate tidal reworking during interflood periods. The Lajas example shows a clear dissipation of tidal effects in the mouth bars, with little or no evidence of tidal influence in the channels, but minor influence in interdistributary areas. Moreover, the position of tidal bidirectional and modulated facies appear to be shifted seaward compared to modern and ancient examples of tide-dominated deltas. The Lajas Fm. is interpreted as a tidally-influenced rather than a tidally-dominated delta, which has implications for (1) geometry of mouth bars, which might be less elongate and more interconnected than if tidally reworked; and (2) grain size distribution in distributary channels, which will contain fewer fluid muds and drapes, and can thus be considered as important additional reservoirs.
Fil: Gugliotta, Marcello. University of Manchester; Reino Unido
Fil: Flint, Stephen. University of Manchester; Reino Unido
Fil: Hodgson, David M.. University of Leeds; Reino Unido
Fil: Veiga, Gonzalo Diego. 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
AAPG 2014 Annual Convention and Exhibition
Houston
Estados Unidos
American Association of Petroleum Geologists
Society for Sedimentary Geology
Materia
SEDIMENTOLOGIA
SISTEMAS DELTAICOS
CUENCA NEUQUINA
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:11336/233380

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oai_identifier_str oai:ri.conicet.gov.ar:11336/233380
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network_name_str CONICET Digital (CONICET)
spelling Interaction of tidal and fluvial processes from delta front to coastal plain: Subsurface implicationsGugliotta, MarcelloFlint, StephenHodgson, David M.Veiga, Gonzalo DiegoSEDIMENTOLOGIASISTEMAS DELTAICOSCUENCA NEUQUINAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Deltas show a range of different morphologies, architectures, facies and grain size distributions. Although the interplay of external factors may contribute to this variety, a significant role is played by the interaction of fluvial and marine processes. Constraining the relative importance of fluvial, tidal and wave effects in an ancient deltaic system, is crucial to improve prediction of 3D depositional architecture and reservoir connectivity. This study provides an example from the Lajas Formation, which consists of middle Jurassic deltaic deposits that accumulated in the back-arc phase of the Neuquén Basin, Argentina. Sedimentological logging, correlation panel construction, architectural element and facies analysis were combined with statistical analysis of rhythmicity in stratal thicknesses, to evaluate the degree of tidal influence during deposition. Lower parts of 5-12 m thickening/coarsening upward packages (medial/distal mouth bars) show ripple-scale bimodal palaeocurrents associated with marine/brackish trace fossils. Upper parts of these packages (proximal mouth bars) show unidirectional river-dominated paleocurrents and rhythmically distributed carbonaceous drapes to cross-beds, indicating modulation by tidal process. Fining-up sandstone packages 3-5 m thick lack trace and body fossils, bimodal paleocurrents and rhythmically distributed carbonaceous drapes, and are interpreted as river-dominated distributary channel fills. Minor (0.5-2 m) thickening/coarsening upward packages are interpreted as interdistributary, marine-influenced bays filled by river-flood derived crevasse subdeltas. Mud drapes, rhythmical bundling and rare bimodal palaeocurrents indicate tidal reworking during interflood periods. The Lajas example shows a clear dissipation of tidal effects in the mouth bars, with little or no evidence of tidal influence in the channels, but minor influence in interdistributary areas. Moreover, the position of tidal bidirectional and modulated facies appear to be shifted seaward compared to modern and ancient examples of tide-dominated deltas. The Lajas Fm. is interpreted as a tidally-influenced rather than a tidally-dominated delta, which has implications for (1) geometry of mouth bars, which might be less elongate and more interconnected than if tidally reworked; and (2) grain size distribution in distributary channels, which will contain fewer fluid muds and drapes, and can thus be considered as important additional reservoirs.Fil: Gugliotta, Marcello. University of Manchester; Reino UnidoFil: Flint, Stephen. University of Manchester; Reino UnidoFil: Hodgson, David M.. University of Leeds; Reino UnidoFil: Veiga, Gonzalo Diego. 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; ArgentinaAAPG 2014 Annual Convention and ExhibitionHoustonEstados UnidosAmerican Association of Petroleum GeologistsSociety for Sedimentary GeologyAmerican Association of Petroleum Geologists2014info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectExposiciónBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/233380Interaction of tidal and fluvial processes from delta front to coastal plain: Subsurface implications; AAPG 2014 Annual Convention and Exhibition; Houston; Estados Unidos; 2014; 1-1CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.searchanddiscovery.com/abstracts/html/2014/90189ace/Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:07:56Zoai:ri.conicet.gov.ar:11336/233380instacron: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:34982025-09-03 10:07:56.574CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Interaction of tidal and fluvial processes from delta front to coastal plain: Subsurface implications
title Interaction of tidal and fluvial processes from delta front to coastal plain: Subsurface implications
spellingShingle Interaction of tidal and fluvial processes from delta front to coastal plain: Subsurface implications
Gugliotta, Marcello
SEDIMENTOLOGIA
SISTEMAS DELTAICOS
CUENCA NEUQUINA
title_short Interaction of tidal and fluvial processes from delta front to coastal plain: Subsurface implications
title_full Interaction of tidal and fluvial processes from delta front to coastal plain: Subsurface implications
title_fullStr Interaction of tidal and fluvial processes from delta front to coastal plain: Subsurface implications
title_full_unstemmed Interaction of tidal and fluvial processes from delta front to coastal plain: Subsurface implications
title_sort Interaction of tidal and fluvial processes from delta front to coastal plain: Subsurface implications
dc.creator.none.fl_str_mv Gugliotta, Marcello
Flint, Stephen
Hodgson, David M.
Veiga, Gonzalo Diego
author Gugliotta, Marcello
author_facet Gugliotta, Marcello
Flint, Stephen
Hodgson, David M.
Veiga, Gonzalo Diego
author_role author
author2 Flint, Stephen
Hodgson, David M.
Veiga, Gonzalo Diego
author2_role author
author
author
dc.subject.none.fl_str_mv SEDIMENTOLOGIA
SISTEMAS DELTAICOS
CUENCA NEUQUINA
topic SEDIMENTOLOGIA
SISTEMAS DELTAICOS
CUENCA NEUQUINA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Deltas show a range of different morphologies, architectures, facies and grain size distributions. Although the interplay of external factors may contribute to this variety, a significant role is played by the interaction of fluvial and marine processes. Constraining the relative importance of fluvial, tidal and wave effects in an ancient deltaic system, is crucial to improve prediction of 3D depositional architecture and reservoir connectivity. This study provides an example from the Lajas Formation, which consists of middle Jurassic deltaic deposits that accumulated in the back-arc phase of the Neuquén Basin, Argentina. Sedimentological logging, correlation panel construction, architectural element and facies analysis were combined with statistical analysis of rhythmicity in stratal thicknesses, to evaluate the degree of tidal influence during deposition. Lower parts of 5-12 m thickening/coarsening upward packages (medial/distal mouth bars) show ripple-scale bimodal palaeocurrents associated with marine/brackish trace fossils. Upper parts of these packages (proximal mouth bars) show unidirectional river-dominated paleocurrents and rhythmically distributed carbonaceous drapes to cross-beds, indicating modulation by tidal process. Fining-up sandstone packages 3-5 m thick lack trace and body fossils, bimodal paleocurrents and rhythmically distributed carbonaceous drapes, and are interpreted as river-dominated distributary channel fills. Minor (0.5-2 m) thickening/coarsening upward packages are interpreted as interdistributary, marine-influenced bays filled by river-flood derived crevasse subdeltas. Mud drapes, rhythmical bundling and rare bimodal palaeocurrents indicate tidal reworking during interflood periods. The Lajas example shows a clear dissipation of tidal effects in the mouth bars, with little or no evidence of tidal influence in the channels, but minor influence in interdistributary areas. Moreover, the position of tidal bidirectional and modulated facies appear to be shifted seaward compared to modern and ancient examples of tide-dominated deltas. The Lajas Fm. is interpreted as a tidally-influenced rather than a tidally-dominated delta, which has implications for (1) geometry of mouth bars, which might be less elongate and more interconnected than if tidally reworked; and (2) grain size distribution in distributary channels, which will contain fewer fluid muds and drapes, and can thus be considered as important additional reservoirs.
Fil: Gugliotta, Marcello. University of Manchester; Reino Unido
Fil: Flint, Stephen. University of Manchester; Reino Unido
Fil: Hodgson, David M.. University of Leeds; Reino Unido
Fil: Veiga, Gonzalo Diego. 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
AAPG 2014 Annual Convention and Exhibition
Houston
Estados Unidos
American Association of Petroleum Geologists
Society for Sedimentary Geology
description Deltas show a range of different morphologies, architectures, facies and grain size distributions. Although the interplay of external factors may contribute to this variety, a significant role is played by the interaction of fluvial and marine processes. Constraining the relative importance of fluvial, tidal and wave effects in an ancient deltaic system, is crucial to improve prediction of 3D depositional architecture and reservoir connectivity. This study provides an example from the Lajas Formation, which consists of middle Jurassic deltaic deposits that accumulated in the back-arc phase of the Neuquén Basin, Argentina. Sedimentological logging, correlation panel construction, architectural element and facies analysis were combined with statistical analysis of rhythmicity in stratal thicknesses, to evaluate the degree of tidal influence during deposition. Lower parts of 5-12 m thickening/coarsening upward packages (medial/distal mouth bars) show ripple-scale bimodal palaeocurrents associated with marine/brackish trace fossils. Upper parts of these packages (proximal mouth bars) show unidirectional river-dominated paleocurrents and rhythmically distributed carbonaceous drapes to cross-beds, indicating modulation by tidal process. Fining-up sandstone packages 3-5 m thick lack trace and body fossils, bimodal paleocurrents and rhythmically distributed carbonaceous drapes, and are interpreted as river-dominated distributary channel fills. Minor (0.5-2 m) thickening/coarsening upward packages are interpreted as interdistributary, marine-influenced bays filled by river-flood derived crevasse subdeltas. Mud drapes, rhythmical bundling and rare bimodal palaeocurrents indicate tidal reworking during interflood periods. The Lajas example shows a clear dissipation of tidal effects in the mouth bars, with little or no evidence of tidal influence in the channels, but minor influence in interdistributary areas. Moreover, the position of tidal bidirectional and modulated facies appear to be shifted seaward compared to modern and ancient examples of tide-dominated deltas. The Lajas Fm. is interpreted as a tidally-influenced rather than a tidally-dominated delta, which has implications for (1) geometry of mouth bars, which might be less elongate and more interconnected than if tidally reworked; and (2) grain size distribution in distributary channels, which will contain fewer fluid muds and drapes, and can thus be considered as important additional reservoirs.
publishDate 2014
dc.date.none.fl_str_mv 2014
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Exposición
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/11336/233380
Interaction of tidal and fluvial processes from delta front to coastal plain: Subsurface implications; AAPG 2014 Annual Convention and Exhibition; Houston; Estados Unidos; 2014; 1-1
CONICET Digital
CONICET
url http://hdl.handle.net/11336/233380
identifier_str_mv Interaction of tidal and fluvial processes from delta front to coastal plain: Subsurface implications; AAPG 2014 Annual Convention and Exhibition; Houston; Estados Unidos; 2014; 1-1
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.searchanddiscovery.com/abstracts/html/2014/90189ace/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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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
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv American Association of Petroleum Geologists
publisher.none.fl_str_mv American Association of Petroleum Geologists
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