Significance of Fracture-Filling Rose-Like Calcite Crystal Clusters in the SE Pyrenees

Fracture-filling rose-like clusters of bladed calcite crystals are found in the northern sector of the Cadí thrust sheet (SE Pyrenees). This unusual calcite crystal morphology has been characterized by using optical and electron microscope, X-ray diffraction, Raman spectroscopy, 18O, 13C, 87Sr/86Sr,...

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Authors: Cruset Segura, David, Ibáñez i Insa, Jordi, Cantarero Abad, Irene, Cédric M., John, Travé i Herrero, Anna
Format: article
Status:Published version
Publication Date:2020
Country:España
Institution:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repository:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/174179
Online Access:https://hdl.handle.net/2445/174179
Access Level:Open access
Keyword:Morfologia (Biologia)
Calcita
Morphology (Biology)
Calcite
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spelling Significance of Fracture-Filling Rose-Like Calcite Crystal Clusters in the SE PyreneesCruset Segura, DavidIbáñez i Insa, JordiCantarero Abad, IreneCédric M., JohnTravé i Herrero, AnnaMorfologia (Biologia)CalcitaMorphology (Biology)CalciteFracture-filling rose-like clusters of bladed calcite crystals are found in the northern sector of the Cadí thrust sheet (SE Pyrenees). This unusual calcite crystal morphology has been characterized by using optical and electron microscope, X-ray diffraction, Raman spectroscopy, 18O, 13C, 87Sr/86Sr, clumped isotopes, and major and rare earth elements + yttrium (REEs + Y) analysis. Petrographic observations and powder X-ray diffraction measurements indicate that these bladed crystals are mainly made of massive rhombic crystals with the conventional (104) faces, as well as of possibly younger, less abundant, and smaller laminar crystals displaying (108) and/or (108) rhombic faces. Raman analysis of liquid fluid inclusions indicates the presence of aromatic hydrocarbons and occasionally alkanes. Clumped isotopes thermometry reflects that bladed calcite precipitated from meteoric fluids at ~60-65 C. The 87Sr/86Sr ratios and major elements and REEs content of calcite indicate that these fluids interacted with Eocene marine carbonates. The presence of younger 'nailhead' calcite indicates later migration of shallow fresh groundwater. The results reveal that rose-like calcite clusters precipitated, at least in the studied area, due to a CO2 release by boiling of meteoric waters that mixed with benzene and aromatic hydrocarbons. This mixing decreased the boiling temperature at ~60-65 C. The results also suggest that the high Sr content in calcite, and probably the presence of proteins within hydrocarbons trapped in fluid inclusions, controlled the precipitation of bladed crystals with (104) rhombohedral faces.MDPI2021202120202021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion24 p.application/pdfhttps://hdl.handle.net/2445/174179Articles 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: https://doi.org/10.3390/min10060522Minerals, 2020, vol. 10, num. 6https://doi.org/10.3390/min10060522cc-by (c) Cruset Segura, David et al., 2020http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/1741792026-05-29T05:05:01Z
dc.title.none.fl_str_mv Significance of Fracture-Filling Rose-Like Calcite Crystal Clusters in the SE Pyrenees
title Significance of Fracture-Filling Rose-Like Calcite Crystal Clusters in the SE Pyrenees
spellingShingle Significance of Fracture-Filling Rose-Like Calcite Crystal Clusters in the SE Pyrenees
Cruset Segura, David
Morfologia (Biologia)
Calcita
Morphology (Biology)
Calcite
title_short Significance of Fracture-Filling Rose-Like Calcite Crystal Clusters in the SE Pyrenees
title_full Significance of Fracture-Filling Rose-Like Calcite Crystal Clusters in the SE Pyrenees
title_fullStr Significance of Fracture-Filling Rose-Like Calcite Crystal Clusters in the SE Pyrenees
title_full_unstemmed Significance of Fracture-Filling Rose-Like Calcite Crystal Clusters in the SE Pyrenees
title_sort Significance of Fracture-Filling Rose-Like Calcite Crystal Clusters in the SE Pyrenees
dc.creator.none.fl_str_mv Cruset Segura, David
Ibáñez i Insa, Jordi
Cantarero Abad, Irene
Cédric M., John
Travé i Herrero, Anna
author Cruset Segura, David
author_facet Cruset Segura, David
Ibáñez i Insa, Jordi
Cantarero Abad, Irene
Cédric M., John
Travé i Herrero, Anna
author_role author
author2 Ibáñez i Insa, Jordi
Cantarero Abad, Irene
Cédric M., John
Travé i Herrero, Anna
author2_role author
author
author
author
dc.subject.none.fl_str_mv Morfologia (Biologia)
Calcita
Morphology (Biology)
Calcite
topic Morfologia (Biologia)
Calcita
Morphology (Biology)
Calcite
description Fracture-filling rose-like clusters of bladed calcite crystals are found in the northern sector of the Cadí thrust sheet (SE Pyrenees). This unusual calcite crystal morphology has been characterized by using optical and electron microscope, X-ray diffraction, Raman spectroscopy, 18O, 13C, 87Sr/86Sr, clumped isotopes, and major and rare earth elements + yttrium (REEs + Y) analysis. Petrographic observations and powder X-ray diffraction measurements indicate that these bladed crystals are mainly made of massive rhombic crystals with the conventional (104) faces, as well as of possibly younger, less abundant, and smaller laminar crystals displaying (108) and/or (108) rhombic faces. Raman analysis of liquid fluid inclusions indicates the presence of aromatic hydrocarbons and occasionally alkanes. Clumped isotopes thermometry reflects that bladed calcite precipitated from meteoric fluids at ~60-65 C. The 87Sr/86Sr ratios and major elements and REEs content of calcite indicate that these fluids interacted with Eocene marine carbonates. The presence of younger 'nailhead' calcite indicates later migration of shallow fresh groundwater. The results reveal that rose-like calcite clusters precipitated, at least in the studied area, due to a CO2 release by boiling of meteoric waters that mixed with benzene and aromatic hydrocarbons. This mixing decreased the boiling temperature at ~60-65 C. The results also suggest that the high Sr content in calcite, and probably the presence of proteins within hydrocarbons trapped in fluid inclusions, controlled the precipitation of bladed crystals with (104) rhombohedral faces.
publishDate 2020
dc.date.none.fl_str_mv 2020
2021
2021
2021
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/2445/174179
url https://hdl.handle.net/2445/174179
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.3390/min10060522
Minerals, 2020, vol. 10, num. 6
https://doi.org/10.3390/min10060522
dc.rights.none.fl_str_mv cc-by (c) Cruset Segura, David et al., 2020
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Cruset Segura, David et al., 2020
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 24 p.
application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
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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