Argon‐40/argon‐39 age of the El'gygytgyn impact event, Chukotka, Russia
Abstract— Lake El'gygytgyn, Chukotka, Russia, lies in a ∼18 km crater of presumably impact origin. The crater is sited in Cretaceous volcanic rocks of the Okhotsk‐Chukotka volcanic belt. Laser 40 Ar/ 39 Ar dating of impact‐melted volcanic rocks from the rim of Lake El'gygytgyn yields a 10‐...
Published in: | Meteoritics & Planetary Science |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2000
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1945-5100.2000.tb01439.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.2000.tb01439.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.2000.tb01439.x |
id |
crwiley:10.1111/j.1945-5100.2000.tb01439.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1945-5100.2000.tb01439.x 2024-09-15T18:02:01+00:00 Argon‐40/argon‐39 age of the El'gygytgyn impact event, Chukotka, Russia LAYER, Paul W. 2000 http://dx.doi.org/10.1111/j.1945-5100.2000.tb01439.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.2000.tb01439.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.2000.tb01439.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Meteoritics & Planetary Science volume 35, issue 3, page 591-599 ISSN 1086-9379 1945-5100 journal-article 2000 crwiley https://doi.org/10.1111/j.1945-5100.2000.tb01439.x 2024-08-06T04:14:29Z Abstract— Lake El'gygytgyn, Chukotka, Russia, lies in a ∼18 km crater of presumably impact origin. The crater is sited in Cretaceous volcanic rocks of the Okhotsk‐Chukotka volcanic belt. Laser 40 Ar/ 39 Ar dating of impact‐melted volcanic rocks from the rim of Lake El'gygytgyn yields a 10‐sample weighted plateau age of 3.58 ± 0.04 Ma. The Ar step‐heating method was critical in this study in identifying inherited Ar in the samples due to incomplete degassing of the Cretaceous volcanic rocks during impact melting. This age is consistent with, but more precise than, previous K‐Ar and fission‐track ages and indicates an “instantaneous” formation of the crater. This tight age control, in conjunction with the presence of impactites, shocked quartz, and other features, is consistent with an impact origin for the structure and seems to discount internal (volcanogenic) origin models. Article in Journal/Newspaper Chukotka Wiley Online Library Meteoritics & Planetary Science 35 3 591 599 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract— Lake El'gygytgyn, Chukotka, Russia, lies in a ∼18 km crater of presumably impact origin. The crater is sited in Cretaceous volcanic rocks of the Okhotsk‐Chukotka volcanic belt. Laser 40 Ar/ 39 Ar dating of impact‐melted volcanic rocks from the rim of Lake El'gygytgyn yields a 10‐sample weighted plateau age of 3.58 ± 0.04 Ma. The Ar step‐heating method was critical in this study in identifying inherited Ar in the samples due to incomplete degassing of the Cretaceous volcanic rocks during impact melting. This age is consistent with, but more precise than, previous K‐Ar and fission‐track ages and indicates an “instantaneous” formation of the crater. This tight age control, in conjunction with the presence of impactites, shocked quartz, and other features, is consistent with an impact origin for the structure and seems to discount internal (volcanogenic) origin models. |
format |
Article in Journal/Newspaper |
author |
LAYER, Paul W. |
spellingShingle |
LAYER, Paul W. Argon‐40/argon‐39 age of the El'gygytgyn impact event, Chukotka, Russia |
author_facet |
LAYER, Paul W. |
author_sort |
LAYER, Paul W. |
title |
Argon‐40/argon‐39 age of the El'gygytgyn impact event, Chukotka, Russia |
title_short |
Argon‐40/argon‐39 age of the El'gygytgyn impact event, Chukotka, Russia |
title_full |
Argon‐40/argon‐39 age of the El'gygytgyn impact event, Chukotka, Russia |
title_fullStr |
Argon‐40/argon‐39 age of the El'gygytgyn impact event, Chukotka, Russia |
title_full_unstemmed |
Argon‐40/argon‐39 age of the El'gygytgyn impact event, Chukotka, Russia |
title_sort |
argon‐40/argon‐39 age of the el'gygytgyn impact event, chukotka, russia |
publisher |
Wiley |
publishDate |
2000 |
url |
http://dx.doi.org/10.1111/j.1945-5100.2000.tb01439.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.2000.tb01439.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.2000.tb01439.x |
genre |
Chukotka |
genre_facet |
Chukotka |
op_source |
Meteoritics & Planetary Science volume 35, issue 3, page 591-599 ISSN 1086-9379 1945-5100 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1945-5100.2000.tb01439.x |
container_title |
Meteoritics & Planetary Science |
container_volume |
35 |
container_issue |
3 |
container_start_page |
591 |
op_container_end_page |
599 |
_version_ |
1810439090359762944 |