Intra-crater sedimentary deposits at the Haughton impact structure, Devon Island, Canadian High Arctic
Detailed field mapping has revealed the presence of a series of intra-crater sedimentary deposits within the interior of the Haughton impact structure, Devon Island, Canadian High Arctic. Coarse-grained, well-sorted, pale gray lithic sandstones (reworked impact melt breccias) unconformably overlie p...
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ftunivarizonaojs:oai:journals.uair.arizona.edu:article/15215 2023-05-15T15:00:35+02:00 Intra-crater sedimentary deposits at the Haughton impact structure, Devon Island, Canadian High Arctic Osinski, Gordon R. Lee, Pascal 2005-01-01 application/pdf https://journals.uair.arizona.edu/index.php/maps/article/view/15215 eng eng Meteoritics & Planetary Science Archives https://journals.uair.arizona.edu/index.php/maps/article/view/15215/15203 https://journals.uair.arizona.edu/index.php/maps/article/view/15215 Meteoritics & Planetary Science Archives; Vol 40, No 12 (2005); 1887-1899 1945-5100 1086-9379 Impact cratering;Sedimentation;Impact breccia;Impact crater;Haughton info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2005 ftunivarizonaojs 2020-11-14T17:53:00Z Detailed field mapping has revealed the presence of a series of intra-crater sedimentary deposits within the interior of the Haughton impact structure, Devon Island, Canadian High Arctic. Coarse-grained, well-sorted, pale gray lithic sandstones (reworked impact melt breccias) unconformably overlie pristine impact melt breccias and attest to an episode of erosion, during which time significant quantities of impact melt breccias were removed. The reworked impact melt breccias are, in turn, unconformably overlain by paleolacustrine sediments of the Miocene Haughton Formation. Sediments of the Haughton Formation were clearly derived from pre-impact lower Paleozoic target rocks of the Allen Bay Formation, which form the crater rim in the northern, western, and southern regions of the Haughton structure. Collectively, these field relationships indicate that the Haughton Formation was deposited up to several million years after the formation of the Haughton crater and that they do not, therefore, represent an immediate, post-impact crater lake deposit. This is consistent with new isotopic dating of impactites from Haughton that indicate an Eocene age for the impact event (Sherlock et al. 2005). In addition, isolated deposits of post-Miocene intra-crater glacigenic and fluvioglacial sediments were found lying unconformably over remnants of the Haughton Formation, impact melt breccias, and other pre-impact target rock formations. These deposits provide clear evidence for glaciation at the Haughton crater. The wealth and complexity of geological and climatological information preserved as intra-crater deposits at Haughton suggests that craters on Mars with intra-crater sedimentary records might present us with similar opportunities, but also possibly significant challenges. Article in Journal/Newspaper Arctic Devon Island Journals at the University of Arizona Allen Bay ENVELOPE(-36.533,-36.533,-54.183,-54.183) Arctic Crater Lake ENVELOPE(-60.667,-60.667,-62.983,-62.983) Devon Island ENVELOPE(-88.000,-88.000,75.252,75.252) Target Rock ENVELOPE(-92.851,-92.851,63.876,63.876) |
institution |
Open Polar |
collection |
Journals at the University of Arizona |
op_collection_id |
ftunivarizonaojs |
language |
English |
topic |
Impact cratering;Sedimentation;Impact breccia;Impact crater;Haughton |
spellingShingle |
Impact cratering;Sedimentation;Impact breccia;Impact crater;Haughton Osinski, Gordon R. Lee, Pascal Intra-crater sedimentary deposits at the Haughton impact structure, Devon Island, Canadian High Arctic |
topic_facet |
Impact cratering;Sedimentation;Impact breccia;Impact crater;Haughton |
description |
Detailed field mapping has revealed the presence of a series of intra-crater sedimentary deposits within the interior of the Haughton impact structure, Devon Island, Canadian High Arctic. Coarse-grained, well-sorted, pale gray lithic sandstones (reworked impact melt breccias) unconformably overlie pristine impact melt breccias and attest to an episode of erosion, during which time significant quantities of impact melt breccias were removed. The reworked impact melt breccias are, in turn, unconformably overlain by paleolacustrine sediments of the Miocene Haughton Formation. Sediments of the Haughton Formation were clearly derived from pre-impact lower Paleozoic target rocks of the Allen Bay Formation, which form the crater rim in the northern, western, and southern regions of the Haughton structure. Collectively, these field relationships indicate that the Haughton Formation was deposited up to several million years after the formation of the Haughton crater and that they do not, therefore, represent an immediate, post-impact crater lake deposit. This is consistent with new isotopic dating of impactites from Haughton that indicate an Eocene age for the impact event (Sherlock et al. 2005). In addition, isolated deposits of post-Miocene intra-crater glacigenic and fluvioglacial sediments were found lying unconformably over remnants of the Haughton Formation, impact melt breccias, and other pre-impact target rock formations. These deposits provide clear evidence for glaciation at the Haughton crater. The wealth and complexity of geological and climatological information preserved as intra-crater deposits at Haughton suggests that craters on Mars with intra-crater sedimentary records might present us with similar opportunities, but also possibly significant challenges. |
format |
Article in Journal/Newspaper |
author |
Osinski, Gordon R. Lee, Pascal |
author_facet |
Osinski, Gordon R. Lee, Pascal |
author_sort |
Osinski, Gordon R. |
title |
Intra-crater sedimentary deposits at the Haughton impact structure, Devon Island, Canadian High Arctic |
title_short |
Intra-crater sedimentary deposits at the Haughton impact structure, Devon Island, Canadian High Arctic |
title_full |
Intra-crater sedimentary deposits at the Haughton impact structure, Devon Island, Canadian High Arctic |
title_fullStr |
Intra-crater sedimentary deposits at the Haughton impact structure, Devon Island, Canadian High Arctic |
title_full_unstemmed |
Intra-crater sedimentary deposits at the Haughton impact structure, Devon Island, Canadian High Arctic |
title_sort |
intra-crater sedimentary deposits at the haughton impact structure, devon island, canadian high arctic |
publisher |
Meteoritics & Planetary Science Archives |
publishDate |
2005 |
url |
https://journals.uair.arizona.edu/index.php/maps/article/view/15215 |
long_lat |
ENVELOPE(-36.533,-36.533,-54.183,-54.183) ENVELOPE(-60.667,-60.667,-62.983,-62.983) ENVELOPE(-88.000,-88.000,75.252,75.252) ENVELOPE(-92.851,-92.851,63.876,63.876) |
geographic |
Allen Bay Arctic Crater Lake Devon Island Target Rock |
geographic_facet |
Allen Bay Arctic Crater Lake Devon Island Target Rock |
genre |
Arctic Devon Island |
genre_facet |
Arctic Devon Island |
op_source |
Meteoritics & Planetary Science Archives; Vol 40, No 12 (2005); 1887-1899 1945-5100 1086-9379 |
op_relation |
https://journals.uair.arizona.edu/index.php/maps/article/view/15215/15203 https://journals.uair.arizona.edu/index.php/maps/article/view/15215 |
_version_ |
1766332667676065792 |