Petrological and experimental study of CV-CK chondrites and conditions of metamorphism in carbonaceous asteroids
Carbonaceous chondrites (CCs) are primitive objects accreted during the earliest stage of the Solar System formation. Mainly composed of chondrules, matrix and refractory inclusions, CCs recorded chemical, isotopic and mineralogical heterogeneities of the solar nebula. Unlike other chondrite classes...
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Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
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HAL CCSD
2012
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Online Access: | https://theses.hal.science/tel-00719574 https://theses.hal.science/tel-00719574/document https://theses.hal.science/tel-00719574/file/Chaumard-2012CLF22226.pdf |
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ftinsu:oai:HAL:tel-00719574v1 |
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openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
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ftinsu |
language |
French |
topic |
Carbonaceous chondrites Petrology Metamorphism Meteoroid Radiative heating Chondrites carbonées Pétrologie Métamorphisme Météoroïde Chaleur radiative [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Carbonaceous chondrites Petrology Metamorphism Meteoroid Radiative heating Chondrites carbonées Pétrologie Métamorphisme Météoroïde Chaleur radiative [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Chaumard, Noël Petrological and experimental study of CV-CK chondrites and conditions of metamorphism in carbonaceous asteroids |
topic_facet |
Carbonaceous chondrites Petrology Metamorphism Meteoroid Radiative heating Chondrites carbonées Pétrologie Métamorphisme Météoroïde Chaleur radiative [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
Carbonaceous chondrites (CCs) are primitive objects accreted during the earliest stage of the Solar System formation. Mainly composed of chondrules, matrix and refractory inclusions, CCs recorded chemical, isotopic and mineralogical heterogeneities of the solar nebula. Unlike other chondrite classes, most CCs are primitive (petrologic types 1 to 3), i.e., they have not been affected by thermal parent-body processes. However, CK chondrites suffered an intense metamorphism (petrologic types 4 to 6). The CK group is characterized by recrystallized matrices, equilibrated olivines (∼Fa31), a high level of oxidation (Ni-rich olivines, metal/magnetite ratio close to zero), low contents of refractory inclusions, refractory lithophile abundances intermediate between CV and CO groups, and oxygen isotope compositions overlapping the CV and CO groups. CKs have been poorly studied until the 1990’s, in part due to the small number of classified samples (210 as of December 6th, 2011), and their small masses (median mass∼33.5g). Isotopic and major element compositions support a genetic link with CV3s. Since1990, recent discoveries of CKs, in particular of CK3s recovered by systematic Antarctic and Saharan collects, allow a detailed study of the CK metamorphic evolution, especially at the 3–4 transition. The objective of this study is the characterization of the conditions of metamorphism of CKs, and through analyses of several CK3–4 samples, the study of the CV-CK relationship. The detailed characterization of the metamorphic evolution of 19 CKs, including 5 CK3, confirms that observed differences between chondritic components in CVs and CKs (abundance, mineralogy, texture) can be explained by a secondary HT-BP thermal process (∼300–650°C) under oxidizing conditions (∼NNO). Moreover, durations of metamorphism obtained by the analysis of diffusion profiles in CK chondrules are intermediate between those commonly admitted for shock (few seconds to several days) and for short-lived radionuclides decay (several million years). An ... |
author2 |
Laboratoire Magmas et Volcans (LMV) Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) Université Blaise Pascal - Clermont-Ferrand II Bertrand Devouard |
format |
Doctoral or Postdoctoral Thesis |
author |
Chaumard, Noël |
author_facet |
Chaumard, Noël |
author_sort |
Chaumard, Noël |
title |
Petrological and experimental study of CV-CK chondrites and conditions of metamorphism in carbonaceous asteroids |
title_short |
Petrological and experimental study of CV-CK chondrites and conditions of metamorphism in carbonaceous asteroids |
title_full |
Petrological and experimental study of CV-CK chondrites and conditions of metamorphism in carbonaceous asteroids |
title_fullStr |
Petrological and experimental study of CV-CK chondrites and conditions of metamorphism in carbonaceous asteroids |
title_full_unstemmed |
Petrological and experimental study of CV-CK chondrites and conditions of metamorphism in carbonaceous asteroids |
title_sort |
petrological and experimental study of cv-ck chondrites and conditions of metamorphism in carbonaceous asteroids |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://theses.hal.science/tel-00719574 https://theses.hal.science/tel-00719574/document https://theses.hal.science/tel-00719574/file/Chaumard-2012CLF22226.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
https://theses.hal.science/tel-00719574 Sciences de la Terre. Université Blaise Pascal - Clermont-Ferrand II, 2012. Français. ⟨NNT : 2012CLF22226⟩ |
op_relation |
NNT: 2012CLF22226 tel-00719574 https://theses.hal.science/tel-00719574 https://theses.hal.science/tel-00719574/document https://theses.hal.science/tel-00719574/file/Chaumard-2012CLF22226.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1802644881149001728 |
spelling |
ftinsu:oai:HAL:tel-00719574v1 2024-06-23T07:46:16+00:00 Petrological and experimental study of CV-CK chondrites and conditions of metamorphism in carbonaceous asteroids Etude pétrologique et expérimentale des chondrites CV-CK et conditions du métamorphisme des astéroïdes carbonés Chaumard, Noël Laboratoire Magmas et Volcans (LMV) Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) Université Blaise Pascal - Clermont-Ferrand II Bertrand Devouard 2012-02-17 https://theses.hal.science/tel-00719574 https://theses.hal.science/tel-00719574/document https://theses.hal.science/tel-00719574/file/Chaumard-2012CLF22226.pdf fr fre HAL CCSD NNT: 2012CLF22226 tel-00719574 https://theses.hal.science/tel-00719574 https://theses.hal.science/tel-00719574/document https://theses.hal.science/tel-00719574/file/Chaumard-2012CLF22226.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-00719574 Sciences de la Terre. Université Blaise Pascal - Clermont-Ferrand II, 2012. Français. ⟨NNT : 2012CLF22226⟩ Carbonaceous chondrites Petrology Metamorphism Meteoroid Radiative heating Chondrites carbonées Pétrologie Métamorphisme Météoroïde Chaleur radiative [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/doctoralThesis Theses 2012 ftinsu 2024-06-12T23:53:28Z Carbonaceous chondrites (CCs) are primitive objects accreted during the earliest stage of the Solar System formation. Mainly composed of chondrules, matrix and refractory inclusions, CCs recorded chemical, isotopic and mineralogical heterogeneities of the solar nebula. Unlike other chondrite classes, most CCs are primitive (petrologic types 1 to 3), i.e., they have not been affected by thermal parent-body processes. However, CK chondrites suffered an intense metamorphism (petrologic types 4 to 6). The CK group is characterized by recrystallized matrices, equilibrated olivines (∼Fa31), a high level of oxidation (Ni-rich olivines, metal/magnetite ratio close to zero), low contents of refractory inclusions, refractory lithophile abundances intermediate between CV and CO groups, and oxygen isotope compositions overlapping the CV and CO groups. CKs have been poorly studied until the 1990’s, in part due to the small number of classified samples (210 as of December 6th, 2011), and their small masses (median mass∼33.5g). Isotopic and major element compositions support a genetic link with CV3s. Since1990, recent discoveries of CKs, in particular of CK3s recovered by systematic Antarctic and Saharan collects, allow a detailed study of the CK metamorphic evolution, especially at the 3–4 transition. The objective of this study is the characterization of the conditions of metamorphism of CKs, and through analyses of several CK3–4 samples, the study of the CV-CK relationship. The detailed characterization of the metamorphic evolution of 19 CKs, including 5 CK3, confirms that observed differences between chondritic components in CVs and CKs (abundance, mineralogy, texture) can be explained by a secondary HT-BP thermal process (∼300–650°C) under oxidizing conditions (∼NNO). Moreover, durations of metamorphism obtained by the analysis of diffusion profiles in CK chondrules are intermediate between those commonly admitted for shock (few seconds to several days) and for short-lived radionuclides decay (several million years). An ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Institut national des sciences de l'Univers: HAL-INSU Antarctic |