Manganese Spherulites at an Intra-Cretaceous Disconformity, Banks Island, Northwest Territories
Concretions ranging from 10 to 700 μ in diameter form a marker zone between the Christopher Formation (Albian) and the Kanguk Formation (Cenomanian to Maastrichtian) in three wells in western Banks Island. The concretions contain in excess of 30% rhodochrosite (MnCO 3 ), plus minor quantities of dol...
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Language: | English |
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Canadian Science Publishing
1974
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Online Access: | http://dx.doi.org/10.1139/e74-168 http://www.nrcresearchpress.com/doi/pdf/10.1139/e74-168 |
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crcansciencepubl:10.1139/e74-168 2023-12-17T10:27:46+01:00 Manganese Spherulites at an Intra-Cretaceous Disconformity, Banks Island, Northwest Territories Miall, Andrew D. 1974 http://dx.doi.org/10.1139/e74-168 http://www.nrcresearchpress.com/doi/pdf/10.1139/e74-168 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 11, issue 12, page 1704-1716 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1974 crcansciencepubl https://doi.org/10.1139/e74-168 2023-11-19T13:39:04Z Concretions ranging from 10 to 700 μ in diameter form a marker zone between the Christopher Formation (Albian) and the Kanguk Formation (Cenomanian to Maastrichtian) in three wells in western Banks Island. The concretions contain in excess of 30% rhodochrosite (MnCO 3 ), plus minor quantities of dolomite, and iron and manganese oxides. Quartz sand and silt, clay, and sparry dolomite comprise the matrix between the concretions. The concretion zone ranges up to 40 ft (12 m) in thickness and is tentatively assigned to the Kanguk Formation.Manganese was probably derived by decomposition of contemporaneous volcanic rocks, possibly located offshore west of Banks Island. The metal was concentrated by ionic or molecular diffusion processes acting immediately below the sediment–water interface.Subsequent diagenetic recrystallization allowed for further manganese concentration and the development of a strong radial-fibrous crystal texture as the surrounding sediments were passively replaced. Concentric laminations were caused by further partial expulsion of impurities, probably including organics and iron and manganese oxides. Article in Journal/Newspaper Banks Island Northwest Territories Canadian Science Publishing (via Crossref) Northwest Territories Canadian Journal of Earth Sciences 11 12 1704 1716 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Miall, Andrew D. Manganese Spherulites at an Intra-Cretaceous Disconformity, Banks Island, Northwest Territories |
topic_facet |
General Earth and Planetary Sciences |
description |
Concretions ranging from 10 to 700 μ in diameter form a marker zone between the Christopher Formation (Albian) and the Kanguk Formation (Cenomanian to Maastrichtian) in three wells in western Banks Island. The concretions contain in excess of 30% rhodochrosite (MnCO 3 ), plus minor quantities of dolomite, and iron and manganese oxides. Quartz sand and silt, clay, and sparry dolomite comprise the matrix between the concretions. The concretion zone ranges up to 40 ft (12 m) in thickness and is tentatively assigned to the Kanguk Formation.Manganese was probably derived by decomposition of contemporaneous volcanic rocks, possibly located offshore west of Banks Island. The metal was concentrated by ionic or molecular diffusion processes acting immediately below the sediment–water interface.Subsequent diagenetic recrystallization allowed for further manganese concentration and the development of a strong radial-fibrous crystal texture as the surrounding sediments were passively replaced. Concentric laminations were caused by further partial expulsion of impurities, probably including organics and iron and manganese oxides. |
format |
Article in Journal/Newspaper |
author |
Miall, Andrew D. |
author_facet |
Miall, Andrew D. |
author_sort |
Miall, Andrew D. |
title |
Manganese Spherulites at an Intra-Cretaceous Disconformity, Banks Island, Northwest Territories |
title_short |
Manganese Spherulites at an Intra-Cretaceous Disconformity, Banks Island, Northwest Territories |
title_full |
Manganese Spherulites at an Intra-Cretaceous Disconformity, Banks Island, Northwest Territories |
title_fullStr |
Manganese Spherulites at an Intra-Cretaceous Disconformity, Banks Island, Northwest Territories |
title_full_unstemmed |
Manganese Spherulites at an Intra-Cretaceous Disconformity, Banks Island, Northwest Territories |
title_sort |
manganese spherulites at an intra-cretaceous disconformity, banks island, northwest territories |
publisher |
Canadian Science Publishing |
publishDate |
1974 |
url |
http://dx.doi.org/10.1139/e74-168 http://www.nrcresearchpress.com/doi/pdf/10.1139/e74-168 |
geographic |
Northwest Territories |
geographic_facet |
Northwest Territories |
genre |
Banks Island Northwest Territories |
genre_facet |
Banks Island Northwest Territories |
op_source |
Canadian Journal of Earth Sciences volume 11, issue 12, page 1704-1716 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e74-168 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
11 |
container_issue |
12 |
container_start_page |
1704 |
op_container_end_page |
1716 |
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1785579688702246912 |