East Greenland Caledonides: stratigraphy, structure and geochronology: Palaeoproterozoic age of a basement gneiss complex in the Charcot Land tectonic window, East Greenland Caledonides
The Charcot Land tectonic window exposes crystalline basement gneisses, which form part of the foreland of the East Greenland Caledonides. These gneisses were previously believed to beArchaean in age, on the basis of imprecise K-Ar analyses carried out in the early 1980s on hornblende from amphiboli...
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Geological Survey of Denmark and Greenland
2004
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ftdoajarticles:oai:doaj.org/article:a6b67fcd182c4d51860c21dd5f63c1d9 2023-05-15T15:54:02+02:00 East Greenland Caledonides: stratigraphy, structure and geochronology: Palaeoproterozoic age of a basement gneiss complex in the Charcot Land tectonic window, East Greenland Caledonides Thrane, Kristine 2004-12-01T00:00:00Z https://doaj.org/article/a6b67fcd182c4d51860c21dd5f63c1d9 EN eng Geological Survey of Denmark and Greenland http://www.geus.dk/publications/bull/nr6/nr6_p57-66.pdf https://doaj.org/toc/1604-8156 1604-8156 https://doaj.org/article/a6b67fcd182c4d51860c21dd5f63c1d9 Geological Survey of Denmark and Greenland Bulletin, Vol 06, Pp 57-66 (2004) Caledonides East Greenland geochronology Palaeoproterozoic Geology QE1-996.5 Geophysics. Cosmic physics QC801-809 article 2004 ftdoajarticles 2022-12-31T00:03:37Z The Charcot Land tectonic window exposes crystalline basement gneisses, which form part of the foreland of the East Greenland Caledonides. These gneisses were previously believed to beArchaean in age, on the basis of imprecise K-Ar analyses carried out in the early 1980s on hornblende from amphibolitic bands and inconclusive Rb/Sr isotope data. New U-Pb singlezircon ion microprobe analyses on the gneisses of the window yield upper intercept ages of 1916 ± 21 and 1928 ± 11 Ma, and are interpreted to represent the age of crystallisation of the igneous protolith. The foreland gneisses of the Charcot Land window are similar in age to parts of the allochthonous gneiss complexes of structurally overlying thrust sheets, but the two terranes have different lithological and structural characteristics. No Archaean rocks have been identified with certainty in any of the East Greenland Caledonian foreland windows. Article in Journal/Newspaper Charcot Land East Greenland Greenland Geological Survey of Denmark and Greenland Bulletin Directory of Open Access Journals: DOAJ Articles Charcot ENVELOPE(139.017,139.017,-69.367,-69.367) Charcot Land ENVELOPE(-29.000,-29.000,72.033,72.033) Greenland |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Caledonides East Greenland geochronology Palaeoproterozoic Geology QE1-996.5 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Caledonides East Greenland geochronology Palaeoproterozoic Geology QE1-996.5 Geophysics. Cosmic physics QC801-809 Thrane, Kristine East Greenland Caledonides: stratigraphy, structure and geochronology: Palaeoproterozoic age of a basement gneiss complex in the Charcot Land tectonic window, East Greenland Caledonides |
topic_facet |
Caledonides East Greenland geochronology Palaeoproterozoic Geology QE1-996.5 Geophysics. Cosmic physics QC801-809 |
description |
The Charcot Land tectonic window exposes crystalline basement gneisses, which form part of the foreland of the East Greenland Caledonides. These gneisses were previously believed to beArchaean in age, on the basis of imprecise K-Ar analyses carried out in the early 1980s on hornblende from amphibolitic bands and inconclusive Rb/Sr isotope data. New U-Pb singlezircon ion microprobe analyses on the gneisses of the window yield upper intercept ages of 1916 ± 21 and 1928 ± 11 Ma, and are interpreted to represent the age of crystallisation of the igneous protolith. The foreland gneisses of the Charcot Land window are similar in age to parts of the allochthonous gneiss complexes of structurally overlying thrust sheets, but the two terranes have different lithological and structural characteristics. No Archaean rocks have been identified with certainty in any of the East Greenland Caledonian foreland windows. |
format |
Article in Journal/Newspaper |
author |
Thrane, Kristine |
author_facet |
Thrane, Kristine |
author_sort |
Thrane, Kristine |
title |
East Greenland Caledonides: stratigraphy, structure and geochronology: Palaeoproterozoic age of a basement gneiss complex in the Charcot Land tectonic window, East Greenland Caledonides |
title_short |
East Greenland Caledonides: stratigraphy, structure and geochronology: Palaeoproterozoic age of a basement gneiss complex in the Charcot Land tectonic window, East Greenland Caledonides |
title_full |
East Greenland Caledonides: stratigraphy, structure and geochronology: Palaeoproterozoic age of a basement gneiss complex in the Charcot Land tectonic window, East Greenland Caledonides |
title_fullStr |
East Greenland Caledonides: stratigraphy, structure and geochronology: Palaeoproterozoic age of a basement gneiss complex in the Charcot Land tectonic window, East Greenland Caledonides |
title_full_unstemmed |
East Greenland Caledonides: stratigraphy, structure and geochronology: Palaeoproterozoic age of a basement gneiss complex in the Charcot Land tectonic window, East Greenland Caledonides |
title_sort |
east greenland caledonides: stratigraphy, structure and geochronology: palaeoproterozoic age of a basement gneiss complex in the charcot land tectonic window, east greenland caledonides |
publisher |
Geological Survey of Denmark and Greenland |
publishDate |
2004 |
url |
https://doaj.org/article/a6b67fcd182c4d51860c21dd5f63c1d9 |
long_lat |
ENVELOPE(139.017,139.017,-69.367,-69.367) ENVELOPE(-29.000,-29.000,72.033,72.033) |
geographic |
Charcot Charcot Land Greenland |
geographic_facet |
Charcot Charcot Land Greenland |
genre |
Charcot Land East Greenland Greenland Geological Survey of Denmark and Greenland Bulletin |
genre_facet |
Charcot Land East Greenland Greenland Geological Survey of Denmark and Greenland Bulletin |
op_source |
Geological Survey of Denmark and Greenland Bulletin, Vol 06, Pp 57-66 (2004) |
op_relation |
http://www.geus.dk/publications/bull/nr6/nr6_p57-66.pdf https://doaj.org/toc/1604-8156 1604-8156 https://doaj.org/article/a6b67fcd182c4d51860c21dd5f63c1d9 |
_version_ |
1766389204212776960 |