Geochemical Composition of Beach Tar from the Se Coast of the Paria Peninsula, Ne Venezuela: Derivation from Natural Seepages

Tar residues (“tarballs”) occur frequently on the SE coast of the Paria Peninsula, NE Venezuela. This paper reports on tarballs recovered from approximately 14 km of shoreline during monthly sampling over a two-year period ending in April, 2011. The tarballs were analysed geochemically and results s...

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Autores: Márquez Martínez, Gonzalo, Galarraga, Freddy, Fernandez, R, De Freitas, K.A, Lorenzo García, Erica, Escobar, Marcos, Sierra, Carlos, Gallego, Jose Ramón
Tipo de recurso: artículo
Fecha de publicación:2013
País:España
Institución:Universidad de Huelva (UHU)
Repositorio:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:inglés
OAI Identifier:oai:ariasmontano.uhu.es:10272/24580
Acceso en línea:https://hdl.handle.net/10272/24580
Access Level:acceso abierto
Palabra clave:marine seepages
seepage oils
tarballs
Trinidad
Venezuela
Gulf of Paria
Naparima Hill Formation
Los Bajos Fault
Organic Geochemistry
2503.03 Geoquímica Exploratoria
2506.12 Geología del Petróleo
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spelling Geochemical Composition of Beach Tar from the Se Coast of the Paria Peninsula, Ne Venezuela: Derivation from Natural SeepagesMárquez Martínez, GonzaloGalarraga, FreddyFernandez, RDe Freitas, K.ALorenzo García, EricaEscobar, MarcosSierra, CarlosGallego, Jose RamónMárquez Martínez, Gonzalomarine seepagesseepage oilstarballsTrinidadVenezuelaGulf of PariaNaparima Hill FormationLos Bajos FaultOrganic Geochemistry2503.03 Geoquímica Exploratoria2506.12 Geología del PetróleoTar residues (“tarballs”) occur frequently on the SE coast of the Paria Peninsula, NE Venezuela. This paper reports on tarballs recovered from approximately 14 km of shoreline during monthly sampling over a two-year period ending in April, 2011. The tarballs were analysed geochemically and results show that more than 70% of them could be included within a single compositional group on the basis of their physical and organoleptic properties. The tarballs were fingerprinted using biomarkers (hopanes, steranes, alkanes, aromatic steroids, phenanthrenes and dibenzothiophenes) by gas chromatography and gas chromatography – mass spectrometry. Sulphur and trace element contents were also determined. These analyses indicate that the tarballs do not have an anthropogenic origin, but that they probably originated from petroleum generated by argillaceous limestones in the Turonian – Campanian Naparima Hill Formation. This formation includes marls and organic-rich shales and limestones, and is an important source rock at oilfields in Trinidad and the southern Gulf of Paria. In the southern part of the Gulf, petroleum escapes from Neogene reservoirs to the seafloor via natural seepages associated with the Los Bajos and other fault systems. It is inferred that the petroleum is then transported by wind and tidal currents to the coast of the SE Paria Peninsula where it strands as tarballs. The geochemistry of the tarballs collected is discussed to investigate their source.Wiley20132013-01-0120132013-01-01journal articlehttp://purl.org/coar/resource_type/c_6501SMURhttp://purl.org/coar/version/c_71e4c1898caa6e32info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10272/24580reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/245802026-06-02T14:58:11Z
dc.title.none.fl_str_mv Geochemical Composition of Beach Tar from the Se Coast of the Paria Peninsula, Ne Venezuela: Derivation from Natural Seepages
title Geochemical Composition of Beach Tar from the Se Coast of the Paria Peninsula, Ne Venezuela: Derivation from Natural Seepages
spellingShingle Geochemical Composition of Beach Tar from the Se Coast of the Paria Peninsula, Ne Venezuela: Derivation from Natural Seepages
Márquez Martínez, Gonzalo
marine seepages
seepage oils
tarballs
Trinidad
Venezuela
Gulf of Paria
Naparima Hill Formation
Los Bajos Fault
Organic Geochemistry
2503.03 Geoquímica Exploratoria
2506.12 Geología del Petróleo
title_short Geochemical Composition of Beach Tar from the Se Coast of the Paria Peninsula, Ne Venezuela: Derivation from Natural Seepages
title_full Geochemical Composition of Beach Tar from the Se Coast of the Paria Peninsula, Ne Venezuela: Derivation from Natural Seepages
title_fullStr Geochemical Composition of Beach Tar from the Se Coast of the Paria Peninsula, Ne Venezuela: Derivation from Natural Seepages
title_full_unstemmed Geochemical Composition of Beach Tar from the Se Coast of the Paria Peninsula, Ne Venezuela: Derivation from Natural Seepages
title_sort Geochemical Composition of Beach Tar from the Se Coast of the Paria Peninsula, Ne Venezuela: Derivation from Natural Seepages
dc.creator.none.fl_str_mv Márquez Martínez, Gonzalo
Galarraga, Freddy
Fernandez, R
De Freitas, K.A
Lorenzo García, Erica
Escobar, Marcos
Sierra, Carlos
Gallego, Jose Ramón
Márquez Martínez, Gonzalo
author Márquez Martínez, Gonzalo
author_facet Márquez Martínez, Gonzalo
Galarraga, Freddy
Fernandez, R
De Freitas, K.A
Lorenzo García, Erica
Escobar, Marcos
Sierra, Carlos
Gallego, Jose Ramón
author_role author
author2 Galarraga, Freddy
Fernandez, R
De Freitas, K.A
Lorenzo García, Erica
Escobar, Marcos
Sierra, Carlos
Gallego, Jose Ramón
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv marine seepages
seepage oils
tarballs
Trinidad
Venezuela
Gulf of Paria
Naparima Hill Formation
Los Bajos Fault
Organic Geochemistry
2503.03 Geoquímica Exploratoria
2506.12 Geología del Petróleo
topic marine seepages
seepage oils
tarballs
Trinidad
Venezuela
Gulf of Paria
Naparima Hill Formation
Los Bajos Fault
Organic Geochemistry
2503.03 Geoquímica Exploratoria
2506.12 Geología del Petróleo
description Tar residues (“tarballs”) occur frequently on the SE coast of the Paria Peninsula, NE Venezuela. This paper reports on tarballs recovered from approximately 14 km of shoreline during monthly sampling over a two-year period ending in April, 2011. The tarballs were analysed geochemically and results show that more than 70% of them could be included within a single compositional group on the basis of their physical and organoleptic properties. The tarballs were fingerprinted using biomarkers (hopanes, steranes, alkanes, aromatic steroids, phenanthrenes and dibenzothiophenes) by gas chromatography and gas chromatography – mass spectrometry. Sulphur and trace element contents were also determined. These analyses indicate that the tarballs do not have an anthropogenic origin, but that they probably originated from petroleum generated by argillaceous limestones in the Turonian – Campanian Naparima Hill Formation. This formation includes marls and organic-rich shales and limestones, and is an important source rock at oilfields in Trinidad and the southern Gulf of Paria. In the southern part of the Gulf, petroleum escapes from Neogene reservoirs to the seafloor via natural seepages associated with the Los Bajos and other fault systems. It is inferred that the petroleum is then transported by wind and tidal currents to the coast of the SE Paria Peninsula where it strands as tarballs. The geochemistry of the tarballs collected is discussed to investigate their source.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-01-01
2013
2013-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
SMUR
http://purl.org/coar/version/c_71e4c1898caa6e32
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10272/24580
url https://hdl.handle.net/10272/24580
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva
instname:Universidad de Huelva (UHU)
instname_str Universidad de Huelva (UHU)
reponame_str Arias Montano. Repositorio Institucional de la Universidad de Huelva
collection Arias Montano. Repositorio Institucional de la Universidad de Huelva
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.198674

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