Paleomagnetism of Canadian Arctic permafrost; Quaternary magnetostratigraphy of the Mackenzie Delta
A total of 357 samples taken from two long cores (Taglu, Kumak) drilled in the Mackenzie River delta have been investigated paleomagnetically. Remanence and susceptibility were measured in the field while the samples were still frozen. Profiles of susceptibility (5772 measurements) permit lateral co...
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1997
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crcansciencepubl:10.1139/e17-011 2023-12-17T10:26:04+01:00 Paleomagnetism of Canadian Arctic permafrost; Quaternary magnetostratigraphy of the Mackenzie Delta Wang, Y. Evans, M. E. 1997 http://dx.doi.org/10.1139/e17-011 http://www.nrcresearchpress.com/doi/pdf/10.1139/e17-011 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 34, issue 2, page 135-139 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1997 crcansciencepubl https://doi.org/10.1139/e17-011 2023-11-19T13:38:39Z A total of 357 samples taken from two long cores (Taglu, Kumak) drilled in the Mackenzie River delta have been investigated paleomagnetically. Remanence and susceptibility were measured in the field while the samples were still frozen. Profiles of susceptibility (5772 measurements) permit lateral correlation and imply that the average accumulation rate at Taglu was ~50% greater than that at Kumak, which lies 15 km to the southwest. Polarity reversals were found in both cores. The Matuyama–Brunhes boundary occurs at depths of 152 and 111 m at Taglu and Kumak, respectively; corresponding depths for the Gauss – Matuyama boundary are 356 and 243 m. In addition to the major chrons, we also find evidence of the Olduvai and Jaramillo subchrons. The chronology based on these data suggests that a major change in sedimentation history occurred about 1.5 Ma ago. This feasibility study thus suggests that paleomagnetism has chronological potential in permafrost environments that are currently important in frontier hydrocarbon exploration and as natural gas hydrate reservoirs. Article in Journal/Newspaper Arctic Mackenzie Delta Mackenzie river permafrost Canadian Science Publishing (via Crossref) Arctic Mackenzie River Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Canadian Journal of Earth Sciences 34 2 135 139 |
institution |
Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Wang, Y. Evans, M. E. Paleomagnetism of Canadian Arctic permafrost; Quaternary magnetostratigraphy of the Mackenzie Delta |
topic_facet |
General Earth and Planetary Sciences |
description |
A total of 357 samples taken from two long cores (Taglu, Kumak) drilled in the Mackenzie River delta have been investigated paleomagnetically. Remanence and susceptibility were measured in the field while the samples were still frozen. Profiles of susceptibility (5772 measurements) permit lateral correlation and imply that the average accumulation rate at Taglu was ~50% greater than that at Kumak, which lies 15 km to the southwest. Polarity reversals were found in both cores. The Matuyama–Brunhes boundary occurs at depths of 152 and 111 m at Taglu and Kumak, respectively; corresponding depths for the Gauss – Matuyama boundary are 356 and 243 m. In addition to the major chrons, we also find evidence of the Olduvai and Jaramillo subchrons. The chronology based on these data suggests that a major change in sedimentation history occurred about 1.5 Ma ago. This feasibility study thus suggests that paleomagnetism has chronological potential in permafrost environments that are currently important in frontier hydrocarbon exploration and as natural gas hydrate reservoirs. |
format |
Article in Journal/Newspaper |
author |
Wang, Y. Evans, M. E. |
author_facet |
Wang, Y. Evans, M. E. |
author_sort |
Wang, Y. |
title |
Paleomagnetism of Canadian Arctic permafrost; Quaternary magnetostratigraphy of the Mackenzie Delta |
title_short |
Paleomagnetism of Canadian Arctic permafrost; Quaternary magnetostratigraphy of the Mackenzie Delta |
title_full |
Paleomagnetism of Canadian Arctic permafrost; Quaternary magnetostratigraphy of the Mackenzie Delta |
title_fullStr |
Paleomagnetism of Canadian Arctic permafrost; Quaternary magnetostratigraphy of the Mackenzie Delta |
title_full_unstemmed |
Paleomagnetism of Canadian Arctic permafrost; Quaternary magnetostratigraphy of the Mackenzie Delta |
title_sort |
paleomagnetism of canadian arctic permafrost; quaternary magnetostratigraphy of the mackenzie delta |
publisher |
Canadian Science Publishing |
publishDate |
1997 |
url |
http://dx.doi.org/10.1139/e17-011 http://www.nrcresearchpress.com/doi/pdf/10.1139/e17-011 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) |
geographic |
Arctic Mackenzie River Mackenzie Delta |
geographic_facet |
Arctic Mackenzie River Mackenzie Delta |
genre |
Arctic Mackenzie Delta Mackenzie river permafrost |
genre_facet |
Arctic Mackenzie Delta Mackenzie river permafrost |
op_source |
Canadian Journal of Earth Sciences volume 34, issue 2, page 135-139 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e17-011 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
34 |
container_issue |
2 |
container_start_page |
135 |
op_container_end_page |
139 |
_version_ |
1785577763612131328 |