Optical rock properties and weathering processes in polar environments (with special reference to Antarctica)
International audience Abstract: As a result of the “ freeze-thaw dogma ”, the polar scientific community has, for a long time, emphasized the importance of physical properties of rocks (porosity, jointing, etc) as a primary control on rock weathering. More recently, due to growing interest in chemi...
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ftclermontuniv:oai:HAL:hal-00267375v1 2023-05-15T13:41:14+02:00 Optical rock properties and weathering processes in polar environments (with special reference to Antarctica) André, Marie-Françoise Hall, Kevin Comte, Virginie Laboratoire de Géographie Physique et Environnementale (GEOLAB) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut Sciences de l'Homme et de la Société (IR SHS UNILIM) Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA) 2004 https://hal.science/hal-00267375 en eng HAL CCSD Taylor & Francis hal-00267375 https://hal.science/hal-00267375 ISSN: 1088-937X Polar Geography https://hal.science/hal-00267375 Polar Geography, 2004, pp.43-62 Géographie physique Milieux naturels info:eu-repo/semantics/article Journal articles 2004 ftclermontuniv 2023-03-29T01:27:29Z International audience Abstract: As a result of the “ freeze-thaw dogma ”, the polar scientific community has, for a long time, emphasized the importance of physical properties of rocks (porosity, jointing, etc) as a primary control on rock weathering. More recently, due to growing interest in chemically-driven processes operating in cold areas, attention has been drawn to the chemical rock properties. Surprisingly, the optical properties of rocks have either been ignored or only alluded to in most rock weathering studies. Based on the available Antarctic biological and geomorphological literature, it is now appropriate to consider these optical properties as exerting a potentially significant influence and to promote a Manichean view in which the light-coloured and translucent rocks (e.g. the emblematic Beacon sandstones) are considered from the perspective of biogenic weathering, while the dark rocks (e.g. the dolerites of the Dry Valleys) are viewed as being influenced by thermal weathering. Field observations and monitoring carried out from Labrador to Antarctica lead, however, to a much more subtle appreciation, for it appears necessary to: (1) integrate the optical properties within a corpus of rock properties (within which some operate synergistically and others antagonistically with those optical properties), (2) to take into account the impact of scale (e.g. macro vs. micro) and (3) to consider the nature and role of lithophytic communities involved in bioweathering. Article in Journal/Newspaper Antarc* Antarctic Antarctica Polar Geography HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne) Antarctic |
institution |
Open Polar |
collection |
HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne) |
op_collection_id |
ftclermontuniv |
language |
English |
topic |
Géographie physique Milieux naturels |
spellingShingle |
Géographie physique Milieux naturels André, Marie-Françoise Hall, Kevin Comte, Virginie Optical rock properties and weathering processes in polar environments (with special reference to Antarctica) |
topic_facet |
Géographie physique Milieux naturels |
description |
International audience Abstract: As a result of the “ freeze-thaw dogma ”, the polar scientific community has, for a long time, emphasized the importance of physical properties of rocks (porosity, jointing, etc) as a primary control on rock weathering. More recently, due to growing interest in chemically-driven processes operating in cold areas, attention has been drawn to the chemical rock properties. Surprisingly, the optical properties of rocks have either been ignored or only alluded to in most rock weathering studies. Based on the available Antarctic biological and geomorphological literature, it is now appropriate to consider these optical properties as exerting a potentially significant influence and to promote a Manichean view in which the light-coloured and translucent rocks (e.g. the emblematic Beacon sandstones) are considered from the perspective of biogenic weathering, while the dark rocks (e.g. the dolerites of the Dry Valleys) are viewed as being influenced by thermal weathering. Field observations and monitoring carried out from Labrador to Antarctica lead, however, to a much more subtle appreciation, for it appears necessary to: (1) integrate the optical properties within a corpus of rock properties (within which some operate synergistically and others antagonistically with those optical properties), (2) to take into account the impact of scale (e.g. macro vs. micro) and (3) to consider the nature and role of lithophytic communities involved in bioweathering. |
author2 |
Laboratoire de Géographie Physique et Environnementale (GEOLAB) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut Sciences de l'Homme et de la Société (IR SHS UNILIM) Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA) |
format |
Article in Journal/Newspaper |
author |
André, Marie-Françoise Hall, Kevin Comte, Virginie |
author_facet |
André, Marie-Françoise Hall, Kevin Comte, Virginie |
author_sort |
André, Marie-Françoise |
title |
Optical rock properties and weathering processes in polar environments (with special reference to Antarctica) |
title_short |
Optical rock properties and weathering processes in polar environments (with special reference to Antarctica) |
title_full |
Optical rock properties and weathering processes in polar environments (with special reference to Antarctica) |
title_fullStr |
Optical rock properties and weathering processes in polar environments (with special reference to Antarctica) |
title_full_unstemmed |
Optical rock properties and weathering processes in polar environments (with special reference to Antarctica) |
title_sort |
optical rock properties and weathering processes in polar environments (with special reference to antarctica) |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-00267375 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Polar Geography |
genre_facet |
Antarc* Antarctic Antarctica Polar Geography |
op_source |
ISSN: 1088-937X Polar Geography https://hal.science/hal-00267375 Polar Geography, 2004, pp.43-62 |
op_relation |
hal-00267375 https://hal.science/hal-00267375 |
_version_ |
1766148063893651456 |