Age of low-grade regional metamorphism in the North Greenland fold belt: mineralogical and Rb–Sr-isotope evidence from pelitic metasediments
Established isotopic sediment-dating techniques have been used to date the time of deformation and metamorphism of the lower Palaeozoic rocks within the North Greenland fold belt. Fine mineral fractions < 2 μm have been separated from pelitic sediments at widely distributed localities and ana...
Published in: | Canadian Journal of Earth Sciences |
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Language: | English |
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Canadian Science Publishing
1994
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Online Access: | http://dx.doi.org/10.1139/e94-033 http://www.nrcresearchpress.com/doi/pdf/10.1139/e94-033 |
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crcansciencepubl:10.1139/e94-033 2023-12-17T10:30:49+01:00 Age of low-grade regional metamorphism in the North Greenland fold belt: mineralogical and Rb–Sr-isotope evidence from pelitic metasediments Springer, N. Friderichsen, J. D. 1994 http://dx.doi.org/10.1139/e94-033 http://www.nrcresearchpress.com/doi/pdf/10.1139/e94-033 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 31, issue 2, page 358-368 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1994 crcansciencepubl https://doi.org/10.1139/e94-033 2023-11-19T13:38:54Z Established isotopic sediment-dating techniques have been used to date the time of deformation and metamorphism of the lower Palaeozoic rocks within the North Greenland fold belt. Fine mineral fractions < 2 μm have been separated from pelitic sediments at widely distributed localities and analysed using X-ray diffraction, isotope, and geochemical techniques.The mineralogical study identified two slightly different mineral parageneses of low greenschist facies. One assemblage without the sodium mica paragonite is confined to calcareous lithologies of the Amundsen Land and Vølvedal groups. The second assemblage includes paragonite and is found in noncalcareous lithologies of the Polkorridoren Group.Rb–Sr isotope dating of the mineral fractions yielded isochron ages in the range 318–346 Ma, which shows that final uplift and cooling associated with Ellesmerian tectonism in North Greenland occurred in the Mississippian. The results suggest that, although the metamorphism was of regional scale, recrystallization and isotopic homogenization occurred in closed systems of local extent. Article in Journal/Newspaper Greenland North Greenland Canadian Science Publishing (via Crossref) Greenland Amundsen Land ENVELOPE(-35.500,-35.500,83.050,83.050) Canadian Journal of Earth Sciences 31 2 358 368 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Springer, N. Friderichsen, J. D. Age of low-grade regional metamorphism in the North Greenland fold belt: mineralogical and Rb–Sr-isotope evidence from pelitic metasediments |
topic_facet |
General Earth and Planetary Sciences |
description |
Established isotopic sediment-dating techniques have been used to date the time of deformation and metamorphism of the lower Palaeozoic rocks within the North Greenland fold belt. Fine mineral fractions < 2 μm have been separated from pelitic sediments at widely distributed localities and analysed using X-ray diffraction, isotope, and geochemical techniques.The mineralogical study identified two slightly different mineral parageneses of low greenschist facies. One assemblage without the sodium mica paragonite is confined to calcareous lithologies of the Amundsen Land and Vølvedal groups. The second assemblage includes paragonite and is found in noncalcareous lithologies of the Polkorridoren Group.Rb–Sr isotope dating of the mineral fractions yielded isochron ages in the range 318–346 Ma, which shows that final uplift and cooling associated with Ellesmerian tectonism in North Greenland occurred in the Mississippian. The results suggest that, although the metamorphism was of regional scale, recrystallization and isotopic homogenization occurred in closed systems of local extent. |
format |
Article in Journal/Newspaper |
author |
Springer, N. Friderichsen, J. D. |
author_facet |
Springer, N. Friderichsen, J. D. |
author_sort |
Springer, N. |
title |
Age of low-grade regional metamorphism in the North Greenland fold belt: mineralogical and Rb–Sr-isotope evidence from pelitic metasediments |
title_short |
Age of low-grade regional metamorphism in the North Greenland fold belt: mineralogical and Rb–Sr-isotope evidence from pelitic metasediments |
title_full |
Age of low-grade regional metamorphism in the North Greenland fold belt: mineralogical and Rb–Sr-isotope evidence from pelitic metasediments |
title_fullStr |
Age of low-grade regional metamorphism in the North Greenland fold belt: mineralogical and Rb–Sr-isotope evidence from pelitic metasediments |
title_full_unstemmed |
Age of low-grade regional metamorphism in the North Greenland fold belt: mineralogical and Rb–Sr-isotope evidence from pelitic metasediments |
title_sort |
age of low-grade regional metamorphism in the north greenland fold belt: mineralogical and rb–sr-isotope evidence from pelitic metasediments |
publisher |
Canadian Science Publishing |
publishDate |
1994 |
url |
http://dx.doi.org/10.1139/e94-033 http://www.nrcresearchpress.com/doi/pdf/10.1139/e94-033 |
long_lat |
ENVELOPE(-35.500,-35.500,83.050,83.050) |
geographic |
Greenland Amundsen Land |
geographic_facet |
Greenland Amundsen Land |
genre |
Greenland North Greenland |
genre_facet |
Greenland North Greenland |
op_source |
Canadian Journal of Earth Sciences volume 31, issue 2, page 358-368 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e94-033 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
31 |
container_issue |
2 |
container_start_page |
358 |
op_container_end_page |
368 |
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1785583897235423232 |