Dissolution effects on the crystallography and Mg/Ca content of planktonic foraminifera Globorotalia tumida (Rotaliina) revealed by X-ray diffractometry
International audience [1] Several authors suggested that the thinning, with increasing depth of deposition, of calcite X-ray diffractometry (XRD) peaks obtained on planktonic foraminifera tests resulted from the preferential removal of their poorly crystallized parts as dissolution increases. By de...
Published in: | Geochemistry, Geophysics, Geosystems |
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ftuniparissaclay:oai:HAL:hal-00377009v1 2024-10-06T13:52:15+00:00 Dissolution effects on the crystallography and Mg/Ca content of planktonic foraminifera Globorotalia tumida (Rotaliina) revealed by X-ray diffractometry Nouet, J. Bassinot, F. Interactions et dynamique des environnements de surface (IDES) Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) 2007 https://hal.science/hal-00377009 https://hal.science/hal-00377009/document https://hal.science/hal-00377009/file/2007GC001647.pdf https://doi.org/10.1029/2007GC001647 en eng HAL CCSD AGU and the Geochemical Society info:eu-repo/semantics/altIdentifier/doi/10.1029/2007GC001647 hal-00377009 https://hal.science/hal-00377009 https://hal.science/hal-00377009/document https://hal.science/hal-00377009/file/2007GC001647.pdf doi:10.1029/2007GC001647 info:eu-repo/semantics/OpenAccess EISSN: 1525-2027 Geochemistry, Geophysics, Geosystems https://hal.science/hal-00377009 Geochemistry, Geophysics, Geosystems, 2007, 8, pp.q10007. ⟨10.1029/2007GC001647⟩ dissolution foraminifera X-ray diffraction crystallinity deconvolution [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2007 ftuniparissaclay https://doi.org/10.1029/2007GC001647 2024-09-06T00:30:31Z International audience [1] Several authors suggested that the thinning, with increasing depth of deposition, of calcite X-ray diffractometry (XRD) peaks obtained on planktonic foraminifera tests resulted from the preferential removal of their poorly crystallized parts as dissolution increases. By deconvolving XRD peak (104) from Globorotalia tumida (surface sediments, Sierra Leone Rise depth transect), we show that the full width at midheight does not depend only upon crystallinity, but reflects also the chemical and structural heterogeneity of foraminifera tests, which results in closely spaced, individual (104) diffraction peaks corresponding to phases with slightly different Mg contents. G. tumida contains two calcite phases: a well crystallized, Mg-poor calcite and a poorly crystallized, Mg-richer calcite. Increasing dissolution results in the preferential removal of the Mg-richer calcite and the improvement of its crystallinity, whereas the Mg-poor calcite does not seem to be affected by dissolution between 2750 m and 4950 m of water depth on Sierra Leone Rise. Article in Journal/Newspaper Planktonic foraminifera Archives ouvertes de Paris-Saclay Geochemistry, Geophysics, Geosystems 8 10 n/a n/a |
institution |
Open Polar |
collection |
Archives ouvertes de Paris-Saclay |
op_collection_id |
ftuniparissaclay |
language |
English |
topic |
dissolution foraminifera X-ray diffraction crystallinity deconvolution [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
dissolution foraminifera X-ray diffraction crystallinity deconvolution [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Nouet, J. Bassinot, F. Dissolution effects on the crystallography and Mg/Ca content of planktonic foraminifera Globorotalia tumida (Rotaliina) revealed by X-ray diffractometry |
topic_facet |
dissolution foraminifera X-ray diffraction crystallinity deconvolution [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience [1] Several authors suggested that the thinning, with increasing depth of deposition, of calcite X-ray diffractometry (XRD) peaks obtained on planktonic foraminifera tests resulted from the preferential removal of their poorly crystallized parts as dissolution increases. By deconvolving XRD peak (104) from Globorotalia tumida (surface sediments, Sierra Leone Rise depth transect), we show that the full width at midheight does not depend only upon crystallinity, but reflects also the chemical and structural heterogeneity of foraminifera tests, which results in closely spaced, individual (104) diffraction peaks corresponding to phases with slightly different Mg contents. G. tumida contains two calcite phases: a well crystallized, Mg-poor calcite and a poorly crystallized, Mg-richer calcite. Increasing dissolution results in the preferential removal of the Mg-richer calcite and the improvement of its crystallinity, whereas the Mg-poor calcite does not seem to be affected by dissolution between 2750 m and 4950 m of water depth on Sierra Leone Rise. |
author2 |
Interactions et dynamique des environnements de surface (IDES) Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) |
format |
Article in Journal/Newspaper |
author |
Nouet, J. Bassinot, F. |
author_facet |
Nouet, J. Bassinot, F. |
author_sort |
Nouet, J. |
title |
Dissolution effects on the crystallography and Mg/Ca content of planktonic foraminifera Globorotalia tumida (Rotaliina) revealed by X-ray diffractometry |
title_short |
Dissolution effects on the crystallography and Mg/Ca content of planktonic foraminifera Globorotalia tumida (Rotaliina) revealed by X-ray diffractometry |
title_full |
Dissolution effects on the crystallography and Mg/Ca content of planktonic foraminifera Globorotalia tumida (Rotaliina) revealed by X-ray diffractometry |
title_fullStr |
Dissolution effects on the crystallography and Mg/Ca content of planktonic foraminifera Globorotalia tumida (Rotaliina) revealed by X-ray diffractometry |
title_full_unstemmed |
Dissolution effects on the crystallography and Mg/Ca content of planktonic foraminifera Globorotalia tumida (Rotaliina) revealed by X-ray diffractometry |
title_sort |
dissolution effects on the crystallography and mg/ca content of planktonic foraminifera globorotalia tumida (rotaliina) revealed by x-ray diffractometry |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00377009 https://hal.science/hal-00377009/document https://hal.science/hal-00377009/file/2007GC001647.pdf https://doi.org/10.1029/2007GC001647 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
EISSN: 1525-2027 Geochemistry, Geophysics, Geosystems https://hal.science/hal-00377009 Geochemistry, Geophysics, Geosystems, 2007, 8, pp.q10007. ⟨10.1029/2007GC001647⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2007GC001647 hal-00377009 https://hal.science/hal-00377009 https://hal.science/hal-00377009/document https://hal.science/hal-00377009/file/2007GC001647.pdf doi:10.1029/2007GC001647 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2007GC001647 |
container_title |
Geochemistry, Geophysics, Geosystems |
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8 |
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10 |
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1812180596113276928 |