Microstructural change in ice: III Observations from an iceberg impact zone
Abstract During a full-scale iceberg-impact study conducted in July 1995 on the Labrador coast, Canada, a sample of ice was retrieved from the impacted surface of an iceberg. The sample was thin-sectioned and the observations of the contact-zone microstructure are presented in this paper. Thin secti...
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/s0022143000001301 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000001301 |
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crcambridgeupr:10.1017/s0022143000001301 2024-03-03T08:42:05+00:00 Microstructural change in ice: III Observations from an iceberg impact zone Muggeridge, K. J. Jordaan, I. J. 1999 http://dx.doi.org/10.1017/s0022143000001301 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000001301 en eng Cambridge University Press (CUP) Journal of Glaciology volume 45, issue 151, page 449-455 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1999 crcambridgeupr https://doi.org/10.1017/s0022143000001301 2024-02-08T08:39:08Z Abstract During a full-scale iceberg-impact study conducted in July 1995 on the Labrador coast, Canada, a sample of ice was retrieved from the impacted surface of an iceberg. The sample was thin-sectioned and the observations of the contact-zone microstructure are presented in this paper. Thin sections were prepared from two slabs cut parallel to the impacted surface. In each of the thin sections taken from the impacted-surface slab, fine-grained material was found to surround parent-size grains (as observed in the second slab). A boundary between the parent grains and the grains of modified microstructure was found running approximately parallel to the impacted surface in each of the thin sections taken from the impacted-surface slab. This boundary was pronounced towards the edges of the contact zone. Lateral movement of grains outward along this boundary was observed in thin sections near the edges but not near the centre of the contact zone. The thin sections were compared to the results of medium-scale indentation tests in 1989 and 1990 from the Arctic Ocean. The same type of fine-grained material and layer formation of modified microstructure was found in the contact zones. Article in Journal/Newspaper Arctic Arctic Ocean Iceberg* Journal of Glaciology Cambridge University Press Arctic Arctic Ocean Canada Journal of Glaciology 45 151 449 455 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Muggeridge, K. J. Jordaan, I. J. Microstructural change in ice: III Observations from an iceberg impact zone |
topic_facet |
Earth-Surface Processes |
description |
Abstract During a full-scale iceberg-impact study conducted in July 1995 on the Labrador coast, Canada, a sample of ice was retrieved from the impacted surface of an iceberg. The sample was thin-sectioned and the observations of the contact-zone microstructure are presented in this paper. Thin sections were prepared from two slabs cut parallel to the impacted surface. In each of the thin sections taken from the impacted-surface slab, fine-grained material was found to surround parent-size grains (as observed in the second slab). A boundary between the parent grains and the grains of modified microstructure was found running approximately parallel to the impacted surface in each of the thin sections taken from the impacted-surface slab. This boundary was pronounced towards the edges of the contact zone. Lateral movement of grains outward along this boundary was observed in thin sections near the edges but not near the centre of the contact zone. The thin sections were compared to the results of medium-scale indentation tests in 1989 and 1990 from the Arctic Ocean. The same type of fine-grained material and layer formation of modified microstructure was found in the contact zones. |
format |
Article in Journal/Newspaper |
author |
Muggeridge, K. J. Jordaan, I. J. |
author_facet |
Muggeridge, K. J. Jordaan, I. J. |
author_sort |
Muggeridge, K. J. |
title |
Microstructural change in ice: III Observations from an iceberg impact zone |
title_short |
Microstructural change in ice: III Observations from an iceberg impact zone |
title_full |
Microstructural change in ice: III Observations from an iceberg impact zone |
title_fullStr |
Microstructural change in ice: III Observations from an iceberg impact zone |
title_full_unstemmed |
Microstructural change in ice: III Observations from an iceberg impact zone |
title_sort |
microstructural change in ice: iii observations from an iceberg impact zone |
publisher |
Cambridge University Press (CUP) |
publishDate |
1999 |
url |
http://dx.doi.org/10.1017/s0022143000001301 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000001301 |
geographic |
Arctic Arctic Ocean Canada |
geographic_facet |
Arctic Arctic Ocean Canada |
genre |
Arctic Arctic Ocean Iceberg* Journal of Glaciology |
genre_facet |
Arctic Arctic Ocean Iceberg* Journal of Glaciology |
op_source |
Journal of Glaciology volume 45, issue 151, page 449-455 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000001301 |
container_title |
Journal of Glaciology |
container_volume |
45 |
container_issue |
151 |
container_start_page |
449 |
op_container_end_page |
455 |
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1792497591785619456 |