Mineral Precipitation in North Slope River Icings
Powdered calcium carbonate (CaCO3) patches averaging 4 cm in thickness were found on icings (aufeis fields) in the Canning and Shaviovik Rivers in northeastern Alaska. The presence of this material on aufeis suggests that much of the water which feeds the aufeis is coming from depth and has flowed t...
Published in: | ARCTIC |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
The Arctic Institute of North America
1980
|
Subjects: | |
Online Access: | https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65619 |
id |
ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/65619 |
---|---|
record_format |
openpolar |
spelling |
ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/65619 2023-05-15T14:19:17+02:00 Mineral Precipitation in North Slope River Icings Hall, Dorothy K. 1980-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65619 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65619/49533 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65619 ARCTIC; Vol. 33 No. 2 (1980): June: 221–381; 343-348 1923-1245 0004-0843 Calcium carbonate Composition Groundwater Icings Rivers Water Alaska Northern info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1980 ftunivcalgaryojs 2022-03-22T21:22:40Z Powdered calcium carbonate (CaCO3) patches averaging 4 cm in thickness were found on icings (aufeis fields) in the Canning and Shaviovik Rivers in northeastern Alaska. The presence of this material on aufeis suggests that much of the water which feeds the aufeis is coming from depth and has flowed through calcareous bedrock. Aufeis forms during the winter at or below the point where groundwater discharges, or when river water is forced upwards through cracks in river ice. Calcium carbonate in solution in the groundwater is excluded as the water freezes during ice growth. The CaCO3 slush then accumulates on top of the ice as the aufeis ablates during the melt season. Four patches of CaCO3, covering approximately 0.1% of the total area of the Canning River aufeis were observed during the July 1978 field study. It is estimated that approximately 540 m³ of CaCO3 precipitate were present in the Canning River aufeis in July of 1978. If similar percentages of CaCO3 precipitate were present on other major aufeis fields on the eastern North Slope, approximately 18000 m³ of CaCO3 may be present during a given year in the major North Slope aufeis fields. Most of this precipitate is deposited into the Arctic Ocean via river flow. Article in Journal/Newspaper Arctic Arctic Arctic Ocean north slope Alaska University of Calgary Journal Hosting Arctic Arctic Ocean ARCTIC 33 2 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Calcium carbonate Composition Groundwater Icings Rivers Water Alaska Northern |
spellingShingle |
Calcium carbonate Composition Groundwater Icings Rivers Water Alaska Northern Hall, Dorothy K. Mineral Precipitation in North Slope River Icings |
topic_facet |
Calcium carbonate Composition Groundwater Icings Rivers Water Alaska Northern |
description |
Powdered calcium carbonate (CaCO3) patches averaging 4 cm in thickness were found on icings (aufeis fields) in the Canning and Shaviovik Rivers in northeastern Alaska. The presence of this material on aufeis suggests that much of the water which feeds the aufeis is coming from depth and has flowed through calcareous bedrock. Aufeis forms during the winter at or below the point where groundwater discharges, or when river water is forced upwards through cracks in river ice. Calcium carbonate in solution in the groundwater is excluded as the water freezes during ice growth. The CaCO3 slush then accumulates on top of the ice as the aufeis ablates during the melt season. Four patches of CaCO3, covering approximately 0.1% of the total area of the Canning River aufeis were observed during the July 1978 field study. It is estimated that approximately 540 m³ of CaCO3 precipitate were present in the Canning River aufeis in July of 1978. If similar percentages of CaCO3 precipitate were present on other major aufeis fields on the eastern North Slope, approximately 18000 m³ of CaCO3 may be present during a given year in the major North Slope aufeis fields. Most of this precipitate is deposited into the Arctic Ocean via river flow. |
format |
Article in Journal/Newspaper |
author |
Hall, Dorothy K. |
author_facet |
Hall, Dorothy K. |
author_sort |
Hall, Dorothy K. |
title |
Mineral Precipitation in North Slope River Icings |
title_short |
Mineral Precipitation in North Slope River Icings |
title_full |
Mineral Precipitation in North Slope River Icings |
title_fullStr |
Mineral Precipitation in North Slope River Icings |
title_full_unstemmed |
Mineral Precipitation in North Slope River Icings |
title_sort |
mineral precipitation in north slope river icings |
publisher |
The Arctic Institute of North America |
publishDate |
1980 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65619 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean north slope Alaska |
genre_facet |
Arctic Arctic Arctic Ocean north slope Alaska |
op_source |
ARCTIC; Vol. 33 No. 2 (1980): June: 221–381; 343-348 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65619/49533 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65619 |
container_title |
ARCTIC |
container_volume |
33 |
container_issue |
2 |
_version_ |
1766290944630456320 |