Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska
Six distal tephra beds from the Yukon Territory and Alaska have been dated by the fission-track method. Zircon and glass ages were determined for the Fort Selkirk and Lost Chicken tephra beds, but only glass ages for the others.Assuming that no track fading has occurred in the glass, Old Crow and Da...
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1982
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crcansciencepubl:10.1139/e82-191 2023-12-17T10:29:22+01:00 Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska Naeser, Nancy D. Westgate, John A. Hughes, Owen L. Péwé, Troy L. 1982 http://dx.doi.org/10.1139/e82-191 http://www.nrcresearchpress.com/doi/pdf/10.1139/e82-191 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 19, issue 11, page 2167-2178 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1982 crcansciencepubl https://doi.org/10.1139/e82-191 2023-11-19T13:39:32Z Six distal tephra beds from the Yukon Territory and Alaska have been dated by the fission-track method. Zircon and glass ages were determined for the Fort Selkirk and Lost Chicken tephra beds, but only glass ages for the others.Assuming that no track fading has occurred in the glass, Old Crow and Dawson tephra beds are younger than 120 000 and 52 000 years BP, respectively. Mosquito Gulch tephra is 1.22 Ma old, Fort Selkirk tephra is about 1 Ma old, the Ester Ash Bed is 0.45 Ma old, and the best estimate of the age of Lost Chicken tephra is the range 1.7–2.6 Ma.It is evident from these results and from the known abundance of tephra beds within late Cenozoic deposits of the Yukon Territory and Alaska that application of the fission-track method to distal tephra, in conjunction with detailed characterization studies, offers great potential for elucidation of the late Cenozoic geologic history of Alaska and the Yukon Territory. Article in Journal/Newspaper Dawson Old Crow Alaska Yukon Canadian Science Publishing (via Crossref) Yukon Gulch ENVELOPE(-61.483,-61.483,-63.997,-63.997) Fort Selkirk ENVELOPE(-137.390,-137.390,62.775,62.775) Mosquito Gulch ENVELOPE(-139.352,-139.352,63.966,63.966) Canadian Journal of Earth Sciences 19 11 2167 2178 |
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 Naeser, Nancy D. Westgate, John A. Hughes, Owen L. Péwé, Troy L. Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska |
topic_facet |
General Earth and Planetary Sciences |
description |
Six distal tephra beds from the Yukon Territory and Alaska have been dated by the fission-track method. Zircon and glass ages were determined for the Fort Selkirk and Lost Chicken tephra beds, but only glass ages for the others.Assuming that no track fading has occurred in the glass, Old Crow and Dawson tephra beds are younger than 120 000 and 52 000 years BP, respectively. Mosquito Gulch tephra is 1.22 Ma old, Fort Selkirk tephra is about 1 Ma old, the Ester Ash Bed is 0.45 Ma old, and the best estimate of the age of Lost Chicken tephra is the range 1.7–2.6 Ma.It is evident from these results and from the known abundance of tephra beds within late Cenozoic deposits of the Yukon Territory and Alaska that application of the fission-track method to distal tephra, in conjunction with detailed characterization studies, offers great potential for elucidation of the late Cenozoic geologic history of Alaska and the Yukon Territory. |
format |
Article in Journal/Newspaper |
author |
Naeser, Nancy D. Westgate, John A. Hughes, Owen L. Péwé, Troy L. |
author_facet |
Naeser, Nancy D. Westgate, John A. Hughes, Owen L. Péwé, Troy L. |
author_sort |
Naeser, Nancy D. |
title |
Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska |
title_short |
Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska |
title_full |
Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska |
title_fullStr |
Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska |
title_full_unstemmed |
Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska |
title_sort |
fission-track ages of late cenozoic distal tephra beds in the yukon territory and alaska |
publisher |
Canadian Science Publishing |
publishDate |
1982 |
url |
http://dx.doi.org/10.1139/e82-191 http://www.nrcresearchpress.com/doi/pdf/10.1139/e82-191 |
long_lat |
ENVELOPE(-61.483,-61.483,-63.997,-63.997) ENVELOPE(-137.390,-137.390,62.775,62.775) ENVELOPE(-139.352,-139.352,63.966,63.966) |
geographic |
Yukon Gulch Fort Selkirk Mosquito Gulch |
geographic_facet |
Yukon Gulch Fort Selkirk Mosquito Gulch |
genre |
Dawson Old Crow Alaska Yukon |
genre_facet |
Dawson Old Crow Alaska Yukon |
op_source |
Canadian Journal of Earth Sciences volume 19, issue 11, page 2167-2178 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e82-191 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
19 |
container_issue |
11 |
container_start_page |
2167 |
op_container_end_page |
2178 |
_version_ |
1785581731605118976 |