Persistent long-term ( c. 24 Ma) exhumation in the Eastern Alaska Range constrained by stacked thermochronology
To address Miocene–present episodic v. persistent exhumation, we utilize a simple graphical procedure that vertically stacks spatially diverse K-feldspar 40 Ar/ 39 Ar multi-domain diffusion (MDD) models from the length of the approximately 100 km-long high-peak region of the Eastern Alaska Range. We...
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Geological Society of London
2016
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ftdatacite:10.6084/m9.figshare.3453284.v1 2023-05-15T13:09:27+02:00 Persistent long-term ( c. 24 Ma) exhumation in the Eastern Alaska Range constrained by stacked thermochronology Benowitz, Jeff A. Layer, Paul W. Vanlaningham, Sam 2016 https://dx.doi.org/10.6084/m9.figshare.3453284.v1 https://geolsoc.figshare.com/articles/dataset/Persistent_long-term_em_c_em_24_Ma_exhumation_in_the_Eastern_Alaska_Range_constrained_by_stacked_thermochronology/3453284/1 unknown Geological Society of London https://dx.doi.org/10.1144/sp378.12 https://dx.doi.org/10.6084/m9.figshare.3453284 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Geology FOS Earth and related environmental sciences dataset Dataset 2016 ftdatacite https://doi.org/10.6084/m9.figshare.3453284.v1 https://doi.org/10.1144/sp378.12 https://doi.org/10.6084/m9.figshare.3453284 2021-11-05T12:55:41Z To address Miocene–present episodic v. persistent exhumation, we utilize a simple graphical procedure that vertically stacks spatially diverse K-feldspar 40 Ar/ 39 Ar multi-domain diffusion (MDD) models from the length of the approximately 100 km-long high-peak region of the Eastern Alaska Range. We supply additional constraints with 40 Ar/ 39 Ar mica dating because the higher closure-temperature-window places limits on the initiation of rapid Eastern Alaska Range exhumation. We also provide a broad 40 Ar/ 39 Ar K-feldspar minimum closure age data set to add more detail on spatial patterns in the regional exhumation history for the Eastern Alaska Range. We find that rapid and persistent exhumation has occurred in the Eastern Alaska Range since about 24 Ma at a long-term rate of approximately 0.9 km/Ma, but that this rapid exhumation is spatially variable through time. Onset of rapid Eastern Alaska Range exhumation is coincident with the initiation of rapid exhumation in SW Alaska, the Western Alaska Range and the Chugach–Saint Elias Range at around 25 Ma, implying a region-wide deformational response to a change in tectonic forcing. The initiation of highly coupled flat-slab subduction of the Yakutat microplate is probably responsible for this prolonged period of rapid exhumation in southern Alaska. Dataset alaska range Yakutat Alaska DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geology FOS Earth and related environmental sciences |
spellingShingle |
Geology FOS Earth and related environmental sciences Benowitz, Jeff A. Layer, Paul W. Vanlaningham, Sam Persistent long-term ( c. 24 Ma) exhumation in the Eastern Alaska Range constrained by stacked thermochronology |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
To address Miocene–present episodic v. persistent exhumation, we utilize a simple graphical procedure that vertically stacks spatially diverse K-feldspar 40 Ar/ 39 Ar multi-domain diffusion (MDD) models from the length of the approximately 100 km-long high-peak region of the Eastern Alaska Range. We supply additional constraints with 40 Ar/ 39 Ar mica dating because the higher closure-temperature-window places limits on the initiation of rapid Eastern Alaska Range exhumation. We also provide a broad 40 Ar/ 39 Ar K-feldspar minimum closure age data set to add more detail on spatial patterns in the regional exhumation history for the Eastern Alaska Range. We find that rapid and persistent exhumation has occurred in the Eastern Alaska Range since about 24 Ma at a long-term rate of approximately 0.9 km/Ma, but that this rapid exhumation is spatially variable through time. Onset of rapid Eastern Alaska Range exhumation is coincident with the initiation of rapid exhumation in SW Alaska, the Western Alaska Range and the Chugach–Saint Elias Range at around 25 Ma, implying a region-wide deformational response to a change in tectonic forcing. The initiation of highly coupled flat-slab subduction of the Yakutat microplate is probably responsible for this prolonged period of rapid exhumation in southern Alaska. |
format |
Dataset |
author |
Benowitz, Jeff A. Layer, Paul W. Vanlaningham, Sam |
author_facet |
Benowitz, Jeff A. Layer, Paul W. Vanlaningham, Sam |
author_sort |
Benowitz, Jeff A. |
title |
Persistent long-term ( c. 24 Ma) exhumation in the Eastern Alaska Range constrained by stacked thermochronology |
title_short |
Persistent long-term ( c. 24 Ma) exhumation in the Eastern Alaska Range constrained by stacked thermochronology |
title_full |
Persistent long-term ( c. 24 Ma) exhumation in the Eastern Alaska Range constrained by stacked thermochronology |
title_fullStr |
Persistent long-term ( c. 24 Ma) exhumation in the Eastern Alaska Range constrained by stacked thermochronology |
title_full_unstemmed |
Persistent long-term ( c. 24 Ma) exhumation in the Eastern Alaska Range constrained by stacked thermochronology |
title_sort |
persistent long-term ( c. 24 ma) exhumation in the eastern alaska range constrained by stacked thermochronology |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3453284.v1 https://geolsoc.figshare.com/articles/dataset/Persistent_long-term_em_c_em_24_Ma_exhumation_in_the_Eastern_Alaska_Range_constrained_by_stacked_thermochronology/3453284/1 |
genre |
alaska range Yakutat Alaska |
genre_facet |
alaska range Yakutat Alaska |
op_relation |
https://dx.doi.org/10.1144/sp378.12 https://dx.doi.org/10.6084/m9.figshare.3453284 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.3453284.v1 https://doi.org/10.1144/sp378.12 https://doi.org/10.6084/m9.figshare.3453284 |
_version_ |
1766177707810357248 |