Reactivity of dolomitizing fluids and Mg source evaluation of fault-controlled dolomitization at the Benicàssim outcrop analogue (Maestrat Basin, E Spain)

The mechanisms responsible for the formation of huge volumes of dolomitized rocks associated with faults are not well understood. We present a case study for high-temperature dolomitization of an Early Cretaceous (Aptian-Albian) ramp in Benicàssim (Maestrat basin, E Spain). In this area, seismic-sca...

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Autores: Gómez Rivas, Enrique, Corbella i Cordomí, Mercè, Martín, Juan Diego (Martín Martín), Stafford, S.L., Teixell Cácharo, Antonio, Bons, Paul D., Griera i Artigas, Albert, Cardellach, E.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2014
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/127756
Acceso en línea:https://hdl.handle.net/2445/127756
Access Level:acceso abierto
Palabra clave:Dolomia
Jaciments hidrotermals
Dolomite
Hydrothermal deposits
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spelling Reactivity of dolomitizing fluids and Mg source evaluation of fault-controlled dolomitization at the Benicàssim outcrop analogue (Maestrat Basin, E Spain)Gómez Rivas, EnriqueCorbella i Cordomí, MercèMartín, Juan Diego (Martín Martín)Stafford, S.L.Teixell Cácharo, AntonioBons, Paul D.Griera i Artigas, AlbertCardellach, E.DolomiaJaciments hidrotermalsDolomiteHydrothermal depositsThe mechanisms responsible for the formation of huge volumes of dolomitized rocks associated with faults are not well understood. We present a case study for high-temperature dolomitization of an Early Cretaceous (Aptian-Albian) ramp in Benicàssim (Maestrat basin, E Spain). In this area, seismic-scale fault-controlled stratabound dolostone bodies extend over several kilometres away from large-scale faults. This work aims at evaluating different Mg sources for dolomitization, estimating the reactivity of dolomitizing fluids at variable temperature and quantifying the required versus available fluid volumes to account for the Benicàssim dolostones. Field relationships, stable 13C and 18O isotopes, as well as radiogenic 87Sr/86Sr isotopes, indicate that dolomitization at Benicàssim was produced by a high temperature fluid (> 80ºC). 13C and 18O isotopic compositions for dolomite vary from +0.5 and +2.9 V-PDB and from +21.1 and +24.3 V-SMOW, respectively. A Mg source analysis reveals that the most likely dolomitizing fluid was seawater-derived brine that interacted with underlying Triassic red beds and Paleozoic basement. Geochemical models suggest that evolved seawater can be considerably more reactive than high-salinity brines, and that the maximum reactivity occurs at about 100ºC. Mass-balance calculations indicate that interstitial fluids with high pressure and/or high temperature relative to the normal geothermal gradient cannot account for the volume of dolomite at Benicàssim. Instead a pervasive fluid circulation mechanism, like thermal convection, is required to provide a sufficient volume of dolomitizing fluid, which most likely occurred during the Late Cretaceous post-rift stage of the Maestrat Basin. This study illustrates the importance of fluid budget quantification to critically evaluate genetic models for dolomitization and other diagenetic processes.Elsevier B.V.2019201920142019info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion29 p.application/pdfhttps://hdl.handle.net/2445/127756Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1016/j.marpetgeo.2013.12.015Marine and Petroleum Geology, 2014, vol. 55, p. 26-42https://doi.org/10.1016/j.marpetgeo.2013.12.015(c) Elsevier B.V., 2014info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1277562026-05-29T05:05:01Z
dc.title.none.fl_str_mv Reactivity of dolomitizing fluids and Mg source evaluation of fault-controlled dolomitization at the Benicàssim outcrop analogue (Maestrat Basin, E Spain)
title Reactivity of dolomitizing fluids and Mg source evaluation of fault-controlled dolomitization at the Benicàssim outcrop analogue (Maestrat Basin, E Spain)
spellingShingle Reactivity of dolomitizing fluids and Mg source evaluation of fault-controlled dolomitization at the Benicàssim outcrop analogue (Maestrat Basin, E Spain)
Gómez Rivas, Enrique
Dolomia
Jaciments hidrotermals
Dolomite
Hydrothermal deposits
title_short Reactivity of dolomitizing fluids and Mg source evaluation of fault-controlled dolomitization at the Benicàssim outcrop analogue (Maestrat Basin, E Spain)
title_full Reactivity of dolomitizing fluids and Mg source evaluation of fault-controlled dolomitization at the Benicàssim outcrop analogue (Maestrat Basin, E Spain)
title_fullStr Reactivity of dolomitizing fluids and Mg source evaluation of fault-controlled dolomitization at the Benicàssim outcrop analogue (Maestrat Basin, E Spain)
title_full_unstemmed Reactivity of dolomitizing fluids and Mg source evaluation of fault-controlled dolomitization at the Benicàssim outcrop analogue (Maestrat Basin, E Spain)
title_sort Reactivity of dolomitizing fluids and Mg source evaluation of fault-controlled dolomitization at the Benicàssim outcrop analogue (Maestrat Basin, E Spain)
dc.creator.none.fl_str_mv Gómez Rivas, Enrique
Corbella i Cordomí, Mercè
Martín, Juan Diego (Martín Martín)
Stafford, S.L.
Teixell Cácharo, Antonio
Bons, Paul D.
Griera i Artigas, Albert
Cardellach, E.
author Gómez Rivas, Enrique
author_facet Gómez Rivas, Enrique
Corbella i Cordomí, Mercè
Martín, Juan Diego (Martín Martín)
Stafford, S.L.
Teixell Cácharo, Antonio
Bons, Paul D.
Griera i Artigas, Albert
Cardellach, E.
author_role author
author2 Corbella i Cordomí, Mercè
Martín, Juan Diego (Martín Martín)
Stafford, S.L.
Teixell Cácharo, Antonio
Bons, Paul D.
Griera i Artigas, Albert
Cardellach, E.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Dolomia
Jaciments hidrotermals
Dolomite
Hydrothermal deposits
topic Dolomia
Jaciments hidrotermals
Dolomite
Hydrothermal deposits
description The mechanisms responsible for the formation of huge volumes of dolomitized rocks associated with faults are not well understood. We present a case study for high-temperature dolomitization of an Early Cretaceous (Aptian-Albian) ramp in Benicàssim (Maestrat basin, E Spain). In this area, seismic-scale fault-controlled stratabound dolostone bodies extend over several kilometres away from large-scale faults. This work aims at evaluating different Mg sources for dolomitization, estimating the reactivity of dolomitizing fluids at variable temperature and quantifying the required versus available fluid volumes to account for the Benicàssim dolostones. Field relationships, stable 13C and 18O isotopes, as well as radiogenic 87Sr/86Sr isotopes, indicate that dolomitization at Benicàssim was produced by a high temperature fluid (> 80ºC). 13C and 18O isotopic compositions for dolomite vary from +0.5 and +2.9 V-PDB and from +21.1 and +24.3 V-SMOW, respectively. A Mg source analysis reveals that the most likely dolomitizing fluid was seawater-derived brine that interacted with underlying Triassic red beds and Paleozoic basement. Geochemical models suggest that evolved seawater can be considerably more reactive than high-salinity brines, and that the maximum reactivity occurs at about 100ºC. Mass-balance calculations indicate that interstitial fluids with high pressure and/or high temperature relative to the normal geothermal gradient cannot account for the volume of dolomite at Benicàssim. Instead a pervasive fluid circulation mechanism, like thermal convection, is required to provide a sufficient volume of dolomitizing fluid, which most likely occurred during the Late Cretaceous post-rift stage of the Maestrat Basin. This study illustrates the importance of fluid budget quantification to critically evaluate genetic models for dolomitization and other diagenetic processes.
publishDate 2014
dc.date.none.fl_str_mv 2014
2019
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/127756
url https://hdl.handle.net/2445/127756
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1016/j.marpetgeo.2013.12.015
Marine and Petroleum Geology, 2014, vol. 55, p. 26-42
https://doi.org/10.1016/j.marpetgeo.2013.12.015
dc.rights.none.fl_str_mv (c) Elsevier B.V., 2014
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Elsevier B.V., 2014
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 29 p.
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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