Kimberlite from Somerset Island, District of Franklin, N.W.T.
A new occurrence of kimberlite located on Somerset Island in the Canadian Arctic is described. The intrusion is in the form of a diatreme showing evidence of fluidization and is emplaced in Ordovician sediments. Kimberlitic breccia containing rounded xenoliths of country rock and massive kimberlite...
Published in: | Canadian Journal of Earth Sciences |
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Language: | English |
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Canadian Science Publishing
1973
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Online Access: | http://dx.doi.org/10.1139/e73-035 http://www.nrcresearchpress.com/doi/pdf/10.1139/e73-035 |
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crcansciencepubl:10.1139/e73-035 2023-12-17T10:26:03+01:00 Kimberlite from Somerset Island, District of Franklin, N.W.T. Mitchell, Roger H. Fritz, Peter 1973 http://dx.doi.org/10.1139/e73-035 http://www.nrcresearchpress.com/doi/pdf/10.1139/e73-035 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 10, issue 3, page 384-393 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1973 crcansciencepubl https://doi.org/10.1139/e73-035 2023-11-19T13:38:33Z A new occurrence of kimberlite located on Somerset Island in the Canadian Arctic is described. The intrusion is in the form of a diatreme showing evidence of fluidization and is emplaced in Ordovician sediments. Kimberlitic breccia containing rounded xenoliths of country rock and massive kimberlite are the dominant rock types. The massive kimberlite contains phenocrysts of olivine (Fo 90 –Fo 93 ), chrome-pyrope (7–12 mol.% uvarovite), and phlogopite together with xenocrysts of pyrope-almandine (28–36 mol.% pyrope, 58–64 mol.% almandine) set in a groundmass of olivine (Fo 89.5 ), magnetite, perovskite, and serpentine. Abundant dolomitic carbonate, which replaces the silicate groundmass, is considered to be primary and to represent a late stage immiscible phase. Emplacement of the diatreme is thought to have been controlled by a crustal lineament defined by the Boothia Uplift. An Upper Ordovician or Lower Silurian age is postulated on the basis of the lack of country rock xenoliths older than Upper Ordovician age within the diatreme. Article in Journal/Newspaper Arctic Somerset Island Canadian Science Publishing (via Crossref) Arctic Somerset Island ENVELOPE(-93.500,-93.500,73.251,73.251) Canadian Journal of Earth Sciences 10 3 384 393 |
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 Mitchell, Roger H. Fritz, Peter Kimberlite from Somerset Island, District of Franklin, N.W.T. |
topic_facet |
General Earth and Planetary Sciences |
description |
A new occurrence of kimberlite located on Somerset Island in the Canadian Arctic is described. The intrusion is in the form of a diatreme showing evidence of fluidization and is emplaced in Ordovician sediments. Kimberlitic breccia containing rounded xenoliths of country rock and massive kimberlite are the dominant rock types. The massive kimberlite contains phenocrysts of olivine (Fo 90 –Fo 93 ), chrome-pyrope (7–12 mol.% uvarovite), and phlogopite together with xenocrysts of pyrope-almandine (28–36 mol.% pyrope, 58–64 mol.% almandine) set in a groundmass of olivine (Fo 89.5 ), magnetite, perovskite, and serpentine. Abundant dolomitic carbonate, which replaces the silicate groundmass, is considered to be primary and to represent a late stage immiscible phase. Emplacement of the diatreme is thought to have been controlled by a crustal lineament defined by the Boothia Uplift. An Upper Ordovician or Lower Silurian age is postulated on the basis of the lack of country rock xenoliths older than Upper Ordovician age within the diatreme. |
format |
Article in Journal/Newspaper |
author |
Mitchell, Roger H. Fritz, Peter |
author_facet |
Mitchell, Roger H. Fritz, Peter |
author_sort |
Mitchell, Roger H. |
title |
Kimberlite from Somerset Island, District of Franklin, N.W.T. |
title_short |
Kimberlite from Somerset Island, District of Franklin, N.W.T. |
title_full |
Kimberlite from Somerset Island, District of Franklin, N.W.T. |
title_fullStr |
Kimberlite from Somerset Island, District of Franklin, N.W.T. |
title_full_unstemmed |
Kimberlite from Somerset Island, District of Franklin, N.W.T. |
title_sort |
kimberlite from somerset island, district of franklin, n.w.t. |
publisher |
Canadian Science Publishing |
publishDate |
1973 |
url |
http://dx.doi.org/10.1139/e73-035 http://www.nrcresearchpress.com/doi/pdf/10.1139/e73-035 |
long_lat |
ENVELOPE(-93.500,-93.500,73.251,73.251) |
geographic |
Arctic Somerset Island |
geographic_facet |
Arctic Somerset Island |
genre |
Arctic Somerset Island |
genre_facet |
Arctic Somerset Island |
op_source |
Canadian Journal of Earth Sciences volume 10, issue 3, page 384-393 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e73-035 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
10 |
container_issue |
3 |
container_start_page |
384 |
op_container_end_page |
393 |
_version_ |
1785577740415533056 |