Eocene to Miocene igneous activity in NE Greenland: northward younging of magmatism along the East Greenland margin
Radiometric dating by the 40 Ar– 39 Ar incremental heating method was carried out on lavas, sills, dykes, and a central intrusion from NE Greenland. Eighteen samples gave acceptable crystallization ages. Lavas of both Lower and Upper Plateau Lava Series gave ages in the range 55.5–53.5 Ma and cannot...
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Geological Society of London
2016
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ftdatacite:10.6084/m9.figshare.3453695.v1 2023-05-15T16:03:49+02:00 Eocene to Miocene igneous activity in NE Greenland: northward younging of magmatism along the East Greenland margin Larsen, Lotte M. Pedersen, Asger K. Tegner, Christian Duncan, Robert A. 2016 https://dx.doi.org/10.6084/m9.figshare.3453695.v1 https://geolsoc.figshare.com/articles/dataset/Eocene_to_Miocene_igneous_activity_in_NE_Greenland_northward_younging_of_magmatism_along_the_East_Greenland_margin/3453695/1 unknown Geological Society of London https://dx.doi.org/10.1144/jgs2013-118 https://dx.doi.org/10.6084/m9.figshare.3453695 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.3453695.v1 https://doi.org/10.1144/jgs2013-118 https://doi.org/10.6084/m9.figshare.3453695 2021-11-05T12:55:41Z Radiometric dating by the 40 Ar– 39 Ar incremental heating method was carried out on lavas, sills, dykes, and a central intrusion from NE Greenland. Eighteen samples gave acceptable crystallization ages. Lavas of both Lower and Upper Plateau Lava Series gave ages in the range 55.5–53.5 Ma and cannot be constrained to better than 56–53 Ma. Sills and dykes from Traill Ø to Shannon, with compositions fairly similar to those of the lavas, gave ages of 55.1–51.3 Ma, contemporaneous with and slightly younger than the lavas. Alkaline lavas on inland nunataks have ages of 53–50 Ma, and the Kap Broer Ruys intrusive centre has an age of 48.7 ± 0.5 Ma. An alkaline sill on Hvalrosø is much younger at 20.3 ± 0.1 Ma. There are no pre-breakup lavas onshore NE Greenland. We surmise that the hot mantle of the Iceland plume arrived and melted extensively beneath the northern basins only at the time of breakup around 55 Ma. Post-breakup intrusive events in NE Greenland coincided with plate-tectonic events such as reorganization, uplift and opening in the north. The Hvalrosø sill represents a local small melting event that may be related to coeval opening of the Lena Trough. Dataset East Greenland Greenland Iceland Shannon Traill ø DataCite Metadata Store (German National Library of Science and Technology) Greenland Kap ENVELOPE(23.567,23.567,65.533,65.533) Kap Broer Ruys ENVELOPE(-20.379,-20.379,73.531,73.531) Traill Ø ENVELOPE(-23.167,-23.167,72.533,72.533) |
institution |
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 Larsen, Lotte M. Pedersen, Asger K. Tegner, Christian Duncan, Robert A. Eocene to Miocene igneous activity in NE Greenland: northward younging of magmatism along the East Greenland margin |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
Radiometric dating by the 40 Ar– 39 Ar incremental heating method was carried out on lavas, sills, dykes, and a central intrusion from NE Greenland. Eighteen samples gave acceptable crystallization ages. Lavas of both Lower and Upper Plateau Lava Series gave ages in the range 55.5–53.5 Ma and cannot be constrained to better than 56–53 Ma. Sills and dykes from Traill Ø to Shannon, with compositions fairly similar to those of the lavas, gave ages of 55.1–51.3 Ma, contemporaneous with and slightly younger than the lavas. Alkaline lavas on inland nunataks have ages of 53–50 Ma, and the Kap Broer Ruys intrusive centre has an age of 48.7 ± 0.5 Ma. An alkaline sill on Hvalrosø is much younger at 20.3 ± 0.1 Ma. There are no pre-breakup lavas onshore NE Greenland. We surmise that the hot mantle of the Iceland plume arrived and melted extensively beneath the northern basins only at the time of breakup around 55 Ma. Post-breakup intrusive events in NE Greenland coincided with plate-tectonic events such as reorganization, uplift and opening in the north. The Hvalrosø sill represents a local small melting event that may be related to coeval opening of the Lena Trough. |
format |
Dataset |
author |
Larsen, Lotte M. Pedersen, Asger K. Tegner, Christian Duncan, Robert A. |
author_facet |
Larsen, Lotte M. Pedersen, Asger K. Tegner, Christian Duncan, Robert A. |
author_sort |
Larsen, Lotte M. |
title |
Eocene to Miocene igneous activity in NE Greenland: northward younging of magmatism along the East Greenland margin |
title_short |
Eocene to Miocene igneous activity in NE Greenland: northward younging of magmatism along the East Greenland margin |
title_full |
Eocene to Miocene igneous activity in NE Greenland: northward younging of magmatism along the East Greenland margin |
title_fullStr |
Eocene to Miocene igneous activity in NE Greenland: northward younging of magmatism along the East Greenland margin |
title_full_unstemmed |
Eocene to Miocene igneous activity in NE Greenland: northward younging of magmatism along the East Greenland margin |
title_sort |
eocene to miocene igneous activity in ne greenland: northward younging of magmatism along the east greenland margin |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3453695.v1 https://geolsoc.figshare.com/articles/dataset/Eocene_to_Miocene_igneous_activity_in_NE_Greenland_northward_younging_of_magmatism_along_the_East_Greenland_margin/3453695/1 |
long_lat |
ENVELOPE(23.567,23.567,65.533,65.533) ENVELOPE(-20.379,-20.379,73.531,73.531) ENVELOPE(-23.167,-23.167,72.533,72.533) |
geographic |
Greenland Kap Kap Broer Ruys Traill Ø |
geographic_facet |
Greenland Kap Kap Broer Ruys Traill Ø |
genre |
East Greenland Greenland Iceland Shannon Traill ø |
genre_facet |
East Greenland Greenland Iceland Shannon Traill ø |
op_relation |
https://dx.doi.org/10.1144/jgs2013-118 https://dx.doi.org/10.6084/m9.figshare.3453695 |
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.3453695.v1 https://doi.org/10.1144/jgs2013-118 https://doi.org/10.6084/m9.figshare.3453695 |
_version_ |
1766399511022796800 |