Occurrence of shallow gas in the easternmost Lago Fagnano (Tierra del Fuego)

Autores
Lodolo, Emanuele; Baradello, L.; Darbo, A.; Caffau, Mauro; Tassone, Alejandro Alberto; Lippai, Horacio Francisco; Lodolo, A.; De Zorzi, G.; Grossi, M.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
High-resolution seismic profiles acquired in the eastern sector of Lago Fagnano, the southernmost ice-free lake in the world, have shown the presence of very shallow gas-bearing layers in the upper sedimentary sequences. The gas-related features observed on seismic profiles include a typical, very strong reflection with reversed polarity, multiple reflections and acoustic blanking that hide subsurface sedimentary and structural features. The top of the acoustically high-amplitude layer is located between 0.3-1.7 m below the lake floor. It generally forms a sharp boundary, often marked by a varying offset probably due to different levels of gas penetration, which could be related to the lithology of the overlying sediments. To confirm the presence of gas, some gravity cores were recovered in places where the blanking effect was most relevant and in the supposed gas-free zone. Sediment core analyses have highlighted the occurrence of significant organic-rich components within the uppermost, largely unconsolidated sedimentary layers, in correspondence of the seismically-detected gassy zone, whereas only a few organic layers were found in the gas-free zone. We assume that the main origin of gas is linked to the presence of a shallow, thin peat-rich layer of Middle-Late Holocene age. In fact, the mapped gassy zone occurs in correspondence of the outlet of the Rio Turbio, the principal tributary of Lago Fagnano, which discharges waters coming from a relatively small sag pond located immediately to the east of the eastern shore of the lake. To date, this is the first evidence of shallow gas in Tierra del Fuego lakes.
Fil: Lodolo, Emanuele. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; Italia
Fil: Baradello, L.. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; Italia
Fil: Darbo, A.. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; Italia
Fil: Caffau, Mauro. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; Italia
Fil: Tassone, Alejandro Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; Argentina
Fil: Lippai, Horacio Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; Argentina
Fil: Lodolo, A.. Hydrotech. Area Science Park; Italia
Fil: De Zorzi, G.. Hydrotech. Area Science Park; Italia
Fil: Grossi, M.. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; Italia
Materia
Sismica
Gas
Lago Fagnano
Tierra del Fuego
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:11336/68243
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Occurrence of shallow gas in the easternmost Lago Fagnano (Tierra del Fuego)Lodolo, EmanueleBaradello, L.Darbo, A.Caffau, MauroTassone, Alejandro AlbertoLippai, Horacio FranciscoLodolo, A.De Zorzi, G.Grossi, M.SismicaGasLago FagnanoTierra del Fuegohttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1High-resolution seismic profiles acquired in the eastern sector of Lago Fagnano, the southernmost ice-free lake in the world, have shown the presence of very shallow gas-bearing layers in the upper sedimentary sequences. The gas-related features observed on seismic profiles include a typical, very strong reflection with reversed polarity, multiple reflections and acoustic blanking that hide subsurface sedimentary and structural features. The top of the acoustically high-amplitude layer is located between 0.3-1.7 m below the lake floor. It generally forms a sharp boundary, often marked by a varying offset probably due to different levels of gas penetration, which could be related to the lithology of the overlying sediments. To confirm the presence of gas, some gravity cores were recovered in places where the blanking effect was most relevant and in the supposed gas-free zone. Sediment core analyses have highlighted the occurrence of significant organic-rich components within the uppermost, largely unconsolidated sedimentary layers, in correspondence of the seismically-detected gassy zone, whereas only a few organic layers were found in the gas-free zone. We assume that the main origin of gas is linked to the presence of a shallow, thin peat-rich layer of Middle-Late Holocene age. In fact, the mapped gassy zone occurs in correspondence of the outlet of the Rio Turbio, the principal tributary of Lago Fagnano, which discharges waters coming from a relatively small sag pond located immediately to the east of the eastern shore of the lake. To date, this is the first evidence of shallow gas in Tierra del Fuego lakes.Fil: Lodolo, Emanuele. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; ItaliaFil: Baradello, L.. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; ItaliaFil: Darbo, A.. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; ItaliaFil: Caffau, Mauro. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; ItaliaFil: Tassone, Alejandro Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; ArgentinaFil: Lippai, Horacio Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; ArgentinaFil: Lodolo, A.. Hydrotech. Area Science Park; ItaliaFil: De Zorzi, G.. Hydrotech. Area Science Park; ItaliaFil: Grossi, M.. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; ItaliaEuropean Association of Geoscientists & Engineers2012-04info: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/11336/68243Lodolo, Emanuele; Baradello, L.; Darbo, A.; Caffau, Mauro; Tassone, Alejandro Alberto; et al.; Occurrence of shallow gas in the easternmost Lago Fagnano (Tierra del Fuego); European Association of Geoscientists & Engineers; Near Surface Geophysics; 10; 2; 4-2012; 161-1691569-4445CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3997/1873-0604.2011040info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.3997/1873-0604.2011040info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:05:13Zoai:ri.conicet.gov.ar:11336/68243instacron: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:34982025-10-15 15:05:14.15CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Occurrence of shallow gas in the easternmost Lago Fagnano (Tierra del Fuego)
title Occurrence of shallow gas in the easternmost Lago Fagnano (Tierra del Fuego)
spellingShingle Occurrence of shallow gas in the easternmost Lago Fagnano (Tierra del Fuego)
Lodolo, Emanuele
Sismica
Gas
Lago Fagnano
Tierra del Fuego
title_short Occurrence of shallow gas in the easternmost Lago Fagnano (Tierra del Fuego)
title_full Occurrence of shallow gas in the easternmost Lago Fagnano (Tierra del Fuego)
title_fullStr Occurrence of shallow gas in the easternmost Lago Fagnano (Tierra del Fuego)
title_full_unstemmed Occurrence of shallow gas in the easternmost Lago Fagnano (Tierra del Fuego)
title_sort Occurrence of shallow gas in the easternmost Lago Fagnano (Tierra del Fuego)
dc.creator.none.fl_str_mv Lodolo, Emanuele
Baradello, L.
Darbo, A.
Caffau, Mauro
Tassone, Alejandro Alberto
Lippai, Horacio Francisco
Lodolo, A.
De Zorzi, G.
Grossi, M.
author Lodolo, Emanuele
author_facet Lodolo, Emanuele
Baradello, L.
Darbo, A.
Caffau, Mauro
Tassone, Alejandro Alberto
Lippai, Horacio Francisco
Lodolo, A.
De Zorzi, G.
Grossi, M.
author_role author
author2 Baradello, L.
Darbo, A.
Caffau, Mauro
Tassone, Alejandro Alberto
Lippai, Horacio Francisco
Lodolo, A.
De Zorzi, G.
Grossi, M.
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Sismica
Gas
Lago Fagnano
Tierra del Fuego
topic Sismica
Gas
Lago Fagnano
Tierra del Fuego
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv High-resolution seismic profiles acquired in the eastern sector of Lago Fagnano, the southernmost ice-free lake in the world, have shown the presence of very shallow gas-bearing layers in the upper sedimentary sequences. The gas-related features observed on seismic profiles include a typical, very strong reflection with reversed polarity, multiple reflections and acoustic blanking that hide subsurface sedimentary and structural features. The top of the acoustically high-amplitude layer is located between 0.3-1.7 m below the lake floor. It generally forms a sharp boundary, often marked by a varying offset probably due to different levels of gas penetration, which could be related to the lithology of the overlying sediments. To confirm the presence of gas, some gravity cores were recovered in places where the blanking effect was most relevant and in the supposed gas-free zone. Sediment core analyses have highlighted the occurrence of significant organic-rich components within the uppermost, largely unconsolidated sedimentary layers, in correspondence of the seismically-detected gassy zone, whereas only a few organic layers were found in the gas-free zone. We assume that the main origin of gas is linked to the presence of a shallow, thin peat-rich layer of Middle-Late Holocene age. In fact, the mapped gassy zone occurs in correspondence of the outlet of the Rio Turbio, the principal tributary of Lago Fagnano, which discharges waters coming from a relatively small sag pond located immediately to the east of the eastern shore of the lake. To date, this is the first evidence of shallow gas in Tierra del Fuego lakes.
Fil: Lodolo, Emanuele. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; Italia
Fil: Baradello, L.. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; Italia
Fil: Darbo, A.. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; Italia
Fil: Caffau, Mauro. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; Italia
Fil: Tassone, Alejandro Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; Argentina
Fil: Lippai, Horacio Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Instituto de Geofísica "Daniel Valencio"; Argentina
Fil: Lodolo, A.. Hydrotech. Area Science Park; Italia
Fil: De Zorzi, G.. Hydrotech. Area Science Park; Italia
Fil: Grossi, M.. Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; Italia
description High-resolution seismic profiles acquired in the eastern sector of Lago Fagnano, the southernmost ice-free lake in the world, have shown the presence of very shallow gas-bearing layers in the upper sedimentary sequences. The gas-related features observed on seismic profiles include a typical, very strong reflection with reversed polarity, multiple reflections and acoustic blanking that hide subsurface sedimentary and structural features. The top of the acoustically high-amplitude layer is located between 0.3-1.7 m below the lake floor. It generally forms a sharp boundary, often marked by a varying offset probably due to different levels of gas penetration, which could be related to the lithology of the overlying sediments. To confirm the presence of gas, some gravity cores were recovered in places where the blanking effect was most relevant and in the supposed gas-free zone. Sediment core analyses have highlighted the occurrence of significant organic-rich components within the uppermost, largely unconsolidated sedimentary layers, in correspondence of the seismically-detected gassy zone, whereas only a few organic layers were found in the gas-free zone. We assume that the main origin of gas is linked to the presence of a shallow, thin peat-rich layer of Middle-Late Holocene age. In fact, the mapped gassy zone occurs in correspondence of the outlet of the Rio Turbio, the principal tributary of Lago Fagnano, which discharges waters coming from a relatively small sag pond located immediately to the east of the eastern shore of the lake. To date, this is the first evidence of shallow gas in Tierra del Fuego lakes.
publishDate 2012
dc.date.none.fl_str_mv 2012-04
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/11336/68243
Lodolo, Emanuele; Baradello, L.; Darbo, A.; Caffau, Mauro; Tassone, Alejandro Alberto; et al.; Occurrence of shallow gas in the easternmost Lago Fagnano (Tierra del Fuego); European Association of Geoscientists & Engineers; Near Surface Geophysics; 10; 2; 4-2012; 161-169
1569-4445
CONICET Digital
CONICET
url http://hdl.handle.net/11336/68243
identifier_str_mv Lodolo, Emanuele; Baradello, L.; Darbo, A.; Caffau, Mauro; Tassone, Alejandro Alberto; et al.; Occurrence of shallow gas in the easternmost Lago Fagnano (Tierra del Fuego); European Association of Geoscientists & Engineers; Near Surface Geophysics; 10; 2; 4-2012; 161-169
1569-4445
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.3997/1873-0604.2011040
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.3997/1873-0604.2011040
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 European Association of Geoscientists & Engineers
publisher.none.fl_str_mv European Association of Geoscientists & Engineers
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 13.221938

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