Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralization

A new dynamic model of dolomitization predicts a multitude of textural, paragenetic, geochemical and other properties of burial dolomites. The model is based on two postulates, (1) that the dolomitizing brine is Mg-rich but under saturated with both calcite and dolomite, and (2) that the dolomite-fo...

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Detalles Bibliográficos
Autores: Merino, Enrique, Canals i Sabaté, Àngels
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2011
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:2445/52945
Acceso en línea:https://hdl.handle.net/2445/52945
Access Level:acceso abierto
Palabra clave:Dolomia
Diagènesi
Dolomite
Diagenesis
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spelling Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralizationMerino, EnriqueCanals i Sabaté, ÀngelsDolomiaDiagènesiDolomiteDiagenesisA new dynamic model of dolomitization predicts a multitude of textural, paragenetic, geochemical and other properties of burial dolomites. The model is based on two postulates, (1) that the dolomitizing brine is Mg-rich but under saturated with both calcite and dolomite, and (2) that the dolomite-for-calcite replacement happens not by dissolution-precipitation as usually assumed, but by dolomite-growth-driven pressure solution of the calcite host. Crucially, the dolomite-for-calcite replacement turns out to be self-accelerating via Ca2 : the Ca2 released by each replacement increment accelerates the rate of the next, and so on. As a result, both pore-fluid Ca2 and replacement rate grow exponentially.American Journal of Science2014201420112014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion35 p.application/pdfhttps://hdl.handle.net/2445/52945Articles 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)InglésReproducció del document publicat a:American Journal of Science, 2011, vol. 311, p. 573-607(c) American Journal of Science, 2011info:eu-repo/semantics/openAccessoai:recercat.cat:2445/529452026-05-29T05:05:01Z
dc.title.none.fl_str_mv Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralization
title Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralization
spellingShingle Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralization
Merino, Enrique
Dolomia
Diagènesi
Dolomite
Diagenesis
title_short Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralization
title_full Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralization
title_fullStr Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralization
title_full_unstemmed Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralization
title_sort Self-accelerating dolomite-for-calcite replacement: Self-organized dynamics of burial dolomitization and associated mineralization
dc.creator.none.fl_str_mv Merino, Enrique
Canals i Sabaté, Àngels
author Merino, Enrique
author_facet Merino, Enrique
Canals i Sabaté, Àngels
author_role author
author2 Canals i Sabaté, Àngels
author2_role author
dc.subject.none.fl_str_mv Dolomia
Diagènesi
Dolomite
Diagenesis
topic Dolomia
Diagènesi
Dolomite
Diagenesis
description A new dynamic model of dolomitization predicts a multitude of textural, paragenetic, geochemical and other properties of burial dolomites. The model is based on two postulates, (1) that the dolomitizing brine is Mg-rich but under saturated with both calcite and dolomite, and (2) that the dolomite-for-calcite replacement happens not by dissolution-precipitation as usually assumed, but by dolomite-growth-driven pressure solution of the calcite host. Crucially, the dolomite-for-calcite replacement turns out to be self-accelerating via Ca2 : the Ca2 released by each replacement increment accelerates the rate of the next, and so on. As a result, both pore-fluid Ca2 and replacement rate grow exponentially.
publishDate 2011
dc.date.none.fl_str_mv 2011
2014
2014
2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/52945
url https://hdl.handle.net/2445/52945
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a:
American Journal of Science, 2011, vol. 311, p. 573-607
dc.rights.none.fl_str_mv (c) American Journal of Science, 2011
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Journal of Science, 2011
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 35 p.
application/pdf
dc.publisher.none.fl_str_mv American Journal of Science
publisher.none.fl_str_mv American Journal of Science
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 15,811543

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