High temperature in-situ study of radiative properties of basaltic dry magmas
International audience Temperature is a key parameter controlling the evolution of lava flows. The hazardous behavior of eruptions prevents direct measurements of hot magmatic bodies. Hence, the temperature of magma is mostly retrieved by using non-contact methods (ground-based or satellite-based th...
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HAL CCSD
2020
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Online Access: | https://hal.science/hal-03554445 https://hal.science/hal-03554445/document https://hal.science/hal-03554445/file/EGU2020-546-print.pdf https://doi.org/10.5194/egusphere-egu2020-546 |
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ftinsu:oai:HAL:hal-03554445v1 |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Biren, Jonas del Campo, Leire Cosson, Lionel Li, Hao Slodczyk, Aneta Andujar, Joan High temperature in-situ study of radiative properties of basaltic dry magmas |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Temperature is a key parameter controlling the evolution of lava flows. The hazardous behavior of eruptions prevents direct measurements of hot magmatic bodies. Hence, the temperature of magma is mostly retrieved by using non-contact methods (ground-based or satellite-based thermal cameras) based on measuring the infrared (IR) emission flux (E) of the body [1]. These well-established techniques are however subjected to important errors, ±100 °C, related to surrounding environment [2], large temperature gradients of cooling lavas [3], constant changes in composition and texture and especially an apparent lack of radiative emission properties during the lava emplacement. Despite that reducing the uncertainties of environmental and thermal gradients when measuring E is ultimately challenging, our study aimed to minimizing the uncertainty in one of the critical hitherto poorly known oversimplified parameters [3,4,5] namely spectral emissivity. Therefore, we performed optical measurements at relevant magmatic temperatures (up to 1200 °C) of representative basaltic dry magmas (MORB, alkaline, calc-alkaline). Emissivity has been systematically determined over a wide spectral (400-15000 cm-1) and thermal range (from room up to 1200 °C) using a non-contact in situ IR emissivity apparatus [6]. SEM, EMPA and Raman spectroscopy techniques were also used in order to characterize and understand the complex radiative behavior of these natural magmatic compositions. Emissivity varies accordingly with temperature and wavenumber but our results also show that small changes in bulk-rock composition produce drastic changes in emissivity at given T, with iron content and its oxidation state being the main agents controlling this parameter. Appropriate emissivity values will then help to refine current field or (space) satellite IR monitoring data (i.e. Holuhraun 2014-2015, Iceland; [3]) and to implement the thermo-rheological models of lava flows [7] as to support hazard assessment and risk ... |
author2 |
Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO) Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) Magma - UMR7327 Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI) Université d'Orléans (UO)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Biren, Jonas del Campo, Leire Cosson, Lionel Li, Hao Slodczyk, Aneta Andujar, Joan |
author_facet |
Biren, Jonas del Campo, Leire Cosson, Lionel Li, Hao Slodczyk, Aneta Andujar, Joan |
author_sort |
Biren, Jonas |
title |
High temperature in-situ study of radiative properties of basaltic dry magmas |
title_short |
High temperature in-situ study of radiative properties of basaltic dry magmas |
title_full |
High temperature in-situ study of radiative properties of basaltic dry magmas |
title_fullStr |
High temperature in-situ study of radiative properties of basaltic dry magmas |
title_full_unstemmed |
High temperature in-situ study of radiative properties of basaltic dry magmas |
title_sort |
high temperature in-situ study of radiative properties of basaltic dry magmas |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03554445 https://hal.science/hal-03554445/document https://hal.science/hal-03554445/file/EGU2020-546-print.pdf https://doi.org/10.5194/egusphere-egu2020-546 |
op_coverage |
Online, France |
long_lat |
ENVELOPE(-16.831,-16.831,64.852,64.852) |
geographic |
Holuhraun |
geographic_facet |
Holuhraun |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
EGU General Assembly 2020 https://hal.science/hal-03554445 EGU General Assembly 2020, May 2020, Online, France. ⟨10.5194/egusphere-egu2020-546⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/egusphere-egu2020-546 hal-03554445 https://hal.science/hal-03554445 https://hal.science/hal-03554445/document https://hal.science/hal-03554445/file/EGU2020-546-print.pdf BIBCODE: 2020EGUGA.22.546B doi:10.5194/egusphere-egu2020-546 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/egusphere-egu2020-546 |
_version_ |
1788062502654836736 |
spelling |
ftinsu:oai:HAL:hal-03554445v1 2024-01-14T10:08:04+01:00 High temperature in-situ study of radiative properties of basaltic dry magmas Biren, Jonas del Campo, Leire Cosson, Lionel Li, Hao Slodczyk, Aneta Andujar, Joan Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO) Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) Magma - UMR7327 Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI) Université d'Orléans (UO)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) Online, France 2020-05-04 https://hal.science/hal-03554445 https://hal.science/hal-03554445/document https://hal.science/hal-03554445/file/EGU2020-546-print.pdf https://doi.org/10.5194/egusphere-egu2020-546 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.5194/egusphere-egu2020-546 hal-03554445 https://hal.science/hal-03554445 https://hal.science/hal-03554445/document https://hal.science/hal-03554445/file/EGU2020-546-print.pdf BIBCODE: 2020EGUGA.22.546B doi:10.5194/egusphere-egu2020-546 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess EGU General Assembly 2020 https://hal.science/hal-03554445 EGU General Assembly 2020, May 2020, Online, France. ⟨10.5194/egusphere-egu2020-546⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/conferenceObject Conference papers 2020 ftinsu https://doi.org/10.5194/egusphere-egu2020-546 2023-12-20T17:24:35Z International audience Temperature is a key parameter controlling the evolution of lava flows. The hazardous behavior of eruptions prevents direct measurements of hot magmatic bodies. Hence, the temperature of magma is mostly retrieved by using non-contact methods (ground-based or satellite-based thermal cameras) based on measuring the infrared (IR) emission flux (E) of the body [1]. These well-established techniques are however subjected to important errors, ±100 °C, related to surrounding environment [2], large temperature gradients of cooling lavas [3], constant changes in composition and texture and especially an apparent lack of radiative emission properties during the lava emplacement. Despite that reducing the uncertainties of environmental and thermal gradients when measuring E is ultimately challenging, our study aimed to minimizing the uncertainty in one of the critical hitherto poorly known oversimplified parameters [3,4,5] namely spectral emissivity. Therefore, we performed optical measurements at relevant magmatic temperatures (up to 1200 °C) of representative basaltic dry magmas (MORB, alkaline, calc-alkaline). Emissivity has been systematically determined over a wide spectral (400-15000 cm-1) and thermal range (from room up to 1200 °C) using a non-contact in situ IR emissivity apparatus [6]. SEM, EMPA and Raman spectroscopy techniques were also used in order to characterize and understand the complex radiative behavior of these natural magmatic compositions. Emissivity varies accordingly with temperature and wavenumber but our results also show that small changes in bulk-rock composition produce drastic changes in emissivity at given T, with iron content and its oxidation state being the main agents controlling this parameter. Appropriate emissivity values will then help to refine current field or (space) satellite IR monitoring data (i.e. Holuhraun 2014-2015, Iceland; [3]) and to implement the thermo-rheological models of lava flows [7] as to support hazard assessment and risk ... Conference Object Iceland Institut national des sciences de l'Univers: HAL-INSU Holuhraun ENVELOPE(-16.831,-16.831,64.852,64.852) |