Devonian ages from 40 Ar/39Ar dating of plagioclase in dolerite dykes, eastern Varanger Peninsula, North Norway.
Gas-release spectra derived from the analysis of plagioclase from three geographically distinct but geochemically comparable dolerite dykes from the eastern part of Varanger Peninsula, northern Norway, show similar features and favour and interpretation that the dykes were intruded in Late Devonian...
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ftnorgesgu:oai:openarchive.ngu.no:11250/2674283 2023-05-15T16:12:57+02:00 Devonian ages from 40 Ar/39Ar dating of plagioclase in dolerite dykes, eastern Varanger Peninsula, North Norway. Guise, Philip G. Roberts, David 24362 Syltefjord 2002 application/pdf https://hdl.handle.net/11250/2674283 eng eng NGU Bulletin (440) https://hdl.handle.net/11250/2674283 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 27-37 DATERING DEVON Journal article 2002 ftnorgesgu 2022-07-03T15:26:30Z Gas-release spectra derived from the analysis of plagioclase from three geographically distinct but geochemically comparable dolerite dykes from the eastern part of Varanger Peninsula, northern Norway, show similar features and favour and interpretation that the dykes were intruded in Late Devonian time at around 370 Ma. These particular dykes had previously yielded fairly similar, K-Ar whole-rock ages. As one of the dykes had earlier been traced into the Trollfjorden-Komagelva Fault Zone with the aid of proton-magnetometer, this would indicate that all significant, displacive movement along this major fault had ceased by latest Devonian to Early Carboniferous rifting and sporadic mafic magmatism reported from adjacent parts of Kola Peninsula and neighbouring areas along the northeastern margin of the Fennoscandian Shield. 50687 Article in Journal/Newspaper Fennoscandian kola peninsula North Norway Northern Norway Varanger NGU Open Archive (Geological Survey of Norway) Kola Peninsula Komagelva ENVELOPE(30.528,30.528,70.241,70.241) Norway Syltefjord ENVELOPE(30.221,30.221,70.547,70.547) |
institution |
Open Polar |
collection |
NGU Open Archive (Geological Survey of Norway) |
op_collection_id |
ftnorgesgu |
language |
English |
topic |
DATERING DEVON |
spellingShingle |
DATERING DEVON Guise, Philip G. Roberts, David Devonian ages from 40 Ar/39Ar dating of plagioclase in dolerite dykes, eastern Varanger Peninsula, North Norway. |
topic_facet |
DATERING DEVON |
description |
Gas-release spectra derived from the analysis of plagioclase from three geographically distinct but geochemically comparable dolerite dykes from the eastern part of Varanger Peninsula, northern Norway, show similar features and favour and interpretation that the dykes were intruded in Late Devonian time at around 370 Ma. These particular dykes had previously yielded fairly similar, K-Ar whole-rock ages. As one of the dykes had earlier been traced into the Trollfjorden-Komagelva Fault Zone with the aid of proton-magnetometer, this would indicate that all significant, displacive movement along this major fault had ceased by latest Devonian to Early Carboniferous rifting and sporadic mafic magmatism reported from adjacent parts of Kola Peninsula and neighbouring areas along the northeastern margin of the Fennoscandian Shield. 50687 |
format |
Article in Journal/Newspaper |
author |
Guise, Philip G. Roberts, David |
author_facet |
Guise, Philip G. Roberts, David |
author_sort |
Guise, Philip G. |
title |
Devonian ages from 40 Ar/39Ar dating of plagioclase in dolerite dykes, eastern Varanger Peninsula, North Norway. |
title_short |
Devonian ages from 40 Ar/39Ar dating of plagioclase in dolerite dykes, eastern Varanger Peninsula, North Norway. |
title_full |
Devonian ages from 40 Ar/39Ar dating of plagioclase in dolerite dykes, eastern Varanger Peninsula, North Norway. |
title_fullStr |
Devonian ages from 40 Ar/39Ar dating of plagioclase in dolerite dykes, eastern Varanger Peninsula, North Norway. |
title_full_unstemmed |
Devonian ages from 40 Ar/39Ar dating of plagioclase in dolerite dykes, eastern Varanger Peninsula, North Norway. |
title_sort |
devonian ages from 40 ar/39ar dating of plagioclase in dolerite dykes, eastern varanger peninsula, north norway. |
publishDate |
2002 |
url |
https://hdl.handle.net/11250/2674283 |
op_coverage |
24362 Syltefjord |
long_lat |
ENVELOPE(30.528,30.528,70.241,70.241) ENVELOPE(30.221,30.221,70.547,70.547) |
geographic |
Kola Peninsula Komagelva Norway Syltefjord |
geographic_facet |
Kola Peninsula Komagelva Norway Syltefjord |
genre |
Fennoscandian kola peninsula North Norway Northern Norway Varanger |
genre_facet |
Fennoscandian kola peninsula North Norway Northern Norway Varanger |
op_source |
27-37 |
op_relation |
NGU Bulletin (440) https://hdl.handle.net/11250/2674283 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
_version_ |
1765998552375361536 |