Mechanical weathering rates on Signy Island, maritime antarctic
By means of re‐evaluating a number of properties of rock tablets left in the field for varying time periods, an estimation of rock breakdown rates is attained. From data obtained during the last five years, it would appear that rates are very slow, only of the order of 2% mass loss per 100 years. Th...
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Online Access: | https://doi.org/10.1002/ppp.3430010108 |
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ftrepec:oai:RePEc:wly:perpro:v:1:y:1990:i:1:p:61-67 2023-05-15T13:59:51+02:00 Mechanical weathering rates on Signy Island, maritime antarctic Kevin Hall https://doi.org/10.1002/ppp.3430010108 unknown https://doi.org/10.1002/ppp.3430010108 article ftrepec https://doi.org/10.1002/ppp.3430010108 2020-12-04T13:31:03Z By means of re‐evaluating a number of properties of rock tablets left in the field for varying time periods, an estimation of rock breakdown rates is attained. From data obtained during the last five years, it would appear that rates are very slow, only of the order of 2% mass loss per 100 years. These rates refer to omnidirectionally frozen, relatively wet samples and, on the basis of laboratory simulation results, are over 50 times greater than for unidirectionally frozen bedrock. It is suggested that mechanical weathering rates in the maritime Antarctic are very slow. En réévaluant différentes propriétés de tablettes de roche laissées sur le terrain pour des périodes de temps variées, une estimation des vitesses de fragmentation de ces roches a été obtenue. A partir des données recueillies pendant les cinq dernières années, il apparait que les vitesses de désagrégation sont très lentes et atteignent seulement par siècle une perte de l'ordre de 2% de la masse. Ces vitesses se rapportent à des gels dans toutes les directions d'échantillons relativement humides. Elles sont cependant 50 fois supérieures à ce qui se produit lorsque la roche gèle dans une seule direction. Ces données suggèrent que la désagrégation mécanique des roches dans l'Antarctique maritime est très lente. Article in Journal/Newspaper Antarc* Antarctic Signy Island RePEc (Research Papers in Economics) Antarctic Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) Permafrost and Periglacial Processes 1 1 61 67 |
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Open Polar |
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RePEc (Research Papers in Economics) |
op_collection_id |
ftrepec |
language |
unknown |
description |
By means of re‐evaluating a number of properties of rock tablets left in the field for varying time periods, an estimation of rock breakdown rates is attained. From data obtained during the last five years, it would appear that rates are very slow, only of the order of 2% mass loss per 100 years. These rates refer to omnidirectionally frozen, relatively wet samples and, on the basis of laboratory simulation results, are over 50 times greater than for unidirectionally frozen bedrock. It is suggested that mechanical weathering rates in the maritime Antarctic are very slow. En réévaluant différentes propriétés de tablettes de roche laissées sur le terrain pour des périodes de temps variées, une estimation des vitesses de fragmentation de ces roches a été obtenue. A partir des données recueillies pendant les cinq dernières années, il apparait que les vitesses de désagrégation sont très lentes et atteignent seulement par siècle une perte de l'ordre de 2% de la masse. Ces vitesses se rapportent à des gels dans toutes les directions d'échantillons relativement humides. Elles sont cependant 50 fois supérieures à ce qui se produit lorsque la roche gèle dans une seule direction. Ces données suggèrent que la désagrégation mécanique des roches dans l'Antarctique maritime est très lente. |
format |
Article in Journal/Newspaper |
author |
Kevin Hall |
spellingShingle |
Kevin Hall Mechanical weathering rates on Signy Island, maritime antarctic |
author_facet |
Kevin Hall |
author_sort |
Kevin Hall |
title |
Mechanical weathering rates on Signy Island, maritime antarctic |
title_short |
Mechanical weathering rates on Signy Island, maritime antarctic |
title_full |
Mechanical weathering rates on Signy Island, maritime antarctic |
title_fullStr |
Mechanical weathering rates on Signy Island, maritime antarctic |
title_full_unstemmed |
Mechanical weathering rates on Signy Island, maritime antarctic |
title_sort |
mechanical weathering rates on signy island, maritime antarctic |
url |
https://doi.org/10.1002/ppp.3430010108 |
long_lat |
ENVELOPE(-45.595,-45.595,-60.708,-60.708) |
geographic |
Antarctic Signy Island |
geographic_facet |
Antarctic Signy Island |
genre |
Antarc* Antarctic Signy Island |
genre_facet |
Antarc* Antarctic Signy Island |
op_relation |
https://doi.org/10.1002/ppp.3430010108 |
op_doi |
https://doi.org/10.1002/ppp.3430010108 |
container_title |
Permafrost and Periglacial Processes |
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1 |
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1 |
container_start_page |
61 |
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67 |
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1766268750430994432 |