Structure, emplacement mechanism and magma-flow significance of igneous fingers – Implications for sill emplacement in sedimentary basins

Autores
Galland, Olivier; Spacapan, Juan Bautista; Rabbel, Ole; Mair, Karen; González Soto, Federico; Eiken, Trond; Schiuma, Mario Federico; Leanza, Hector Armando
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Field and seismic observations show that numerous sills exhibit lobate morphologies. Each lobe corresponds to a distinct igneous segment exhibiting a finger-like shape, the long axis of which is commonly interpreted as a magma-flow indicator. Robust understanding of the emplacement mechanisms of finger-shaped sills, and direct observations supporting finger orientation as magma-flow indicator are lacking. In this paper, we present the results of detailed structural mapping on an exceptional, easily accessible 1-km long outcrop in the Neuquén Basin, Argentina, that exhibits a sill, its contacts and the structures in the finely layered sedimentary host rock. We show that the sill is made of distinct segments that grew, inflated or coalesced. We also demonstrate that the fingers were emplaced according to the viscoelastic fingering or viscous indenter models, with no field evidence of tensile elastic fracture mechanism as commonly assumed in mechanical models of sill emplacement. We identified new structural criteria at the intrusion's contacts for inferring magma flow direction during the magma emplacement. Our small-scale structural observations carried out on a seismic-scale outcrop have the potential to considerably aid the structural interpretation of seismic data imaging igneous sills, i.e. to fill the standard gap between outcrop-scale field observations and seismic-scale geophysical data.
Fil: Galland, Olivier. University of Oslo; Noruega
Fil: Spacapan, Juan Bautista. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. YPF - Tecnología; Argentina
Fil: Rabbel, Ole. University of Oslo; Noruega
Fil: Mair, Karen. University of Oslo; Noruega
Fil: González Soto, Federico. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina
Fil: Eiken, Trond. University of Oslo; Noruega
Fil: Schiuma, Mario Federico. YPF - Tecnología; Argentina
Fil: Leanza, Hector Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Materia
IGNEOUS FINGERS
INTEGRATED DRONE SURVEY/FIELD MEASUREMENTS
MAGMA-FLOW INDICATORS
VISCOELASTIC FINGERING
VISCOUS INDENTER
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:11336/124594
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/124594
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Structure, emplacement mechanism and magma-flow significance of igneous fingers – Implications for sill emplacement in sedimentary basinsGalland, OlivierSpacapan, Juan BautistaRabbel, OleMair, KarenGonzález Soto, FedericoEiken, TrondSchiuma, Mario FedericoLeanza, Hector ArmandoIGNEOUS FINGERSINTEGRATED DRONE SURVEY/FIELD MEASUREMENTSMAGMA-FLOW INDICATORSVISCOELASTIC FINGERINGVISCOUS INDENTERhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Field and seismic observations show that numerous sills exhibit lobate morphologies. Each lobe corresponds to a distinct igneous segment exhibiting a finger-like shape, the long axis of which is commonly interpreted as a magma-flow indicator. Robust understanding of the emplacement mechanisms of finger-shaped sills, and direct observations supporting finger orientation as magma-flow indicator are lacking. In this paper, we present the results of detailed structural mapping on an exceptional, easily accessible 1-km long outcrop in the Neuquén Basin, Argentina, that exhibits a sill, its contacts and the structures in the finely layered sedimentary host rock. We show that the sill is made of distinct segments that grew, inflated or coalesced. We also demonstrate that the fingers were emplaced according to the viscoelastic fingering or viscous indenter models, with no field evidence of tensile elastic fracture mechanism as commonly assumed in mechanical models of sill emplacement. We identified new structural criteria at the intrusion's contacts for inferring magma flow direction during the magma emplacement. Our small-scale structural observations carried out on a seismic-scale outcrop have the potential to considerably aid the structural interpretation of seismic data imaging igneous sills, i.e. to fill the standard gap between outcrop-scale field observations and seismic-scale geophysical data.Fil: Galland, Olivier. University of Oslo; NoruegaFil: Spacapan, Juan Bautista. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. YPF - Tecnología; ArgentinaFil: Rabbel, Ole. University of Oslo; NoruegaFil: Mair, Karen. University of Oslo; NoruegaFil: González Soto, Federico. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: Eiken, Trond. University of Oslo; NoruegaFil: Schiuma, Mario Federico. YPF - Tecnología; ArgentinaFil: Leanza, Hector Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaPergamon-Elsevier Science Ltd2019-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/124594Galland, Olivier; Spacapan, Juan Bautista; Rabbel, Ole; Mair, Karen; González Soto, Federico; et al.; Structure, emplacement mechanism and magma-flow significance of igneous fingers – Implications for sill emplacement in sedimentary basins; Pergamon-Elsevier Science Ltd; Journal Of Structural Geology; 124; 7-2019; 120-1350191-8141CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsg.2019.04.013info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0191814118305121info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:50:17Zoai:ri.conicet.gov.ar:11336/124594instacron: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 09:50:17.721CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Structure, emplacement mechanism and magma-flow significance of igneous fingers – Implications for sill emplacement in sedimentary basins
title Structure, emplacement mechanism and magma-flow significance of igneous fingers – Implications for sill emplacement in sedimentary basins
spellingShingle Structure, emplacement mechanism and magma-flow significance of igneous fingers – Implications for sill emplacement in sedimentary basins
Galland, Olivier
IGNEOUS FINGERS
INTEGRATED DRONE SURVEY/FIELD MEASUREMENTS
MAGMA-FLOW INDICATORS
VISCOELASTIC FINGERING
VISCOUS INDENTER
title_short Structure, emplacement mechanism and magma-flow significance of igneous fingers – Implications for sill emplacement in sedimentary basins
title_full Structure, emplacement mechanism and magma-flow significance of igneous fingers – Implications for sill emplacement in sedimentary basins
title_fullStr Structure, emplacement mechanism and magma-flow significance of igneous fingers – Implications for sill emplacement in sedimentary basins
title_full_unstemmed Structure, emplacement mechanism and magma-flow significance of igneous fingers – Implications for sill emplacement in sedimentary basins
title_sort Structure, emplacement mechanism and magma-flow significance of igneous fingers – Implications for sill emplacement in sedimentary basins
dc.creator.none.fl_str_mv Galland, Olivier
Spacapan, Juan Bautista
Rabbel, Ole
Mair, Karen
González Soto, Federico
Eiken, Trond
Schiuma, Mario Federico
Leanza, Hector Armando
author Galland, Olivier
author_facet Galland, Olivier
Spacapan, Juan Bautista
Rabbel, Ole
Mair, Karen
González Soto, Federico
Eiken, Trond
Schiuma, Mario Federico
Leanza, Hector Armando
author_role author
author2 Spacapan, Juan Bautista
Rabbel, Ole
Mair, Karen
González Soto, Federico
Eiken, Trond
Schiuma, Mario Federico
Leanza, Hector Armando
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv IGNEOUS FINGERS
INTEGRATED DRONE SURVEY/FIELD MEASUREMENTS
MAGMA-FLOW INDICATORS
VISCOELASTIC FINGERING
VISCOUS INDENTER
topic IGNEOUS FINGERS
INTEGRATED DRONE SURVEY/FIELD MEASUREMENTS
MAGMA-FLOW INDICATORS
VISCOELASTIC FINGERING
VISCOUS INDENTER
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Field and seismic observations show that numerous sills exhibit lobate morphologies. Each lobe corresponds to a distinct igneous segment exhibiting a finger-like shape, the long axis of which is commonly interpreted as a magma-flow indicator. Robust understanding of the emplacement mechanisms of finger-shaped sills, and direct observations supporting finger orientation as magma-flow indicator are lacking. In this paper, we present the results of detailed structural mapping on an exceptional, easily accessible 1-km long outcrop in the Neuquén Basin, Argentina, that exhibits a sill, its contacts and the structures in the finely layered sedimentary host rock. We show that the sill is made of distinct segments that grew, inflated or coalesced. We also demonstrate that the fingers were emplaced according to the viscoelastic fingering or viscous indenter models, with no field evidence of tensile elastic fracture mechanism as commonly assumed in mechanical models of sill emplacement. We identified new structural criteria at the intrusion's contacts for inferring magma flow direction during the magma emplacement. Our small-scale structural observations carried out on a seismic-scale outcrop have the potential to considerably aid the structural interpretation of seismic data imaging igneous sills, i.e. to fill the standard gap between outcrop-scale field observations and seismic-scale geophysical data.
Fil: Galland, Olivier. University of Oslo; Noruega
Fil: Spacapan, Juan Bautista. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. YPF - Tecnología; Argentina
Fil: Rabbel, Ole. University of Oslo; Noruega
Fil: Mair, Karen. University of Oslo; Noruega
Fil: González Soto, Federico. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina
Fil: Eiken, Trond. University of Oslo; Noruega
Fil: Schiuma, Mario Federico. YPF - Tecnología; Argentina
Fil: Leanza, Hector Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
description Field and seismic observations show that numerous sills exhibit lobate morphologies. Each lobe corresponds to a distinct igneous segment exhibiting a finger-like shape, the long axis of which is commonly interpreted as a magma-flow indicator. Robust understanding of the emplacement mechanisms of finger-shaped sills, and direct observations supporting finger orientation as magma-flow indicator are lacking. In this paper, we present the results of detailed structural mapping on an exceptional, easily accessible 1-km long outcrop in the Neuquén Basin, Argentina, that exhibits a sill, its contacts and the structures in the finely layered sedimentary host rock. We show that the sill is made of distinct segments that grew, inflated or coalesced. We also demonstrate that the fingers were emplaced according to the viscoelastic fingering or viscous indenter models, with no field evidence of tensile elastic fracture mechanism as commonly assumed in mechanical models of sill emplacement. We identified new structural criteria at the intrusion's contacts for inferring magma flow direction during the magma emplacement. Our small-scale structural observations carried out on a seismic-scale outcrop have the potential to considerably aid the structural interpretation of seismic data imaging igneous sills, i.e. to fill the standard gap between outcrop-scale field observations and seismic-scale geophysical data.
publishDate 2019
dc.date.none.fl_str_mv 2019-07
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/11336/124594
Galland, Olivier; Spacapan, Juan Bautista; Rabbel, Ole; Mair, Karen; González Soto, Federico; et al.; Structure, emplacement mechanism and magma-flow significance of igneous fingers – Implications for sill emplacement in sedimentary basins; Pergamon-Elsevier Science Ltd; Journal Of Structural Geology; 124; 7-2019; 120-135
0191-8141
CONICET Digital
CONICET
url http://hdl.handle.net/11336/124594
identifier_str_mv Galland, Olivier; Spacapan, Juan Bautista; Rabbel, Ole; Mair, Karen; González Soto, Federico; et al.; Structure, emplacement mechanism and magma-flow significance of igneous fingers – Implications for sill emplacement in sedimentary basins; Pergamon-Elsevier Science Ltd; Journal Of Structural Geology; 124; 7-2019; 120-135
0191-8141
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsg.2019.04.013
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0191814118305121
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
application/pdf
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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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score 13.13397

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