From source migmatites to to plutons: tracking the origin of ca. 435 Ma S-type granites in the East Greenland Caledonian orogen
In the Caledonian orogen of East Greenland, superb exposure along steep fjord walls allows direct observation of the origin of ca. 435 Ma S-type granites by anatexis of paragneisses, and collection of the resulting melts into wider sheets and plutons. Field observations suggest that 'fertile...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/92740 2024-01-14T10:06:31+01:00 From source migmatites to to plutons: tracking the origin of ca. 435 Ma S-type granites in the East Greenland Caledonian orogen Kalsbeek, Feiko Jepsen, H Nutman, Allen http://hdl.handle.net/1885/92740 https://doi.org/10.1016/S0024-4937(00)00071-2 https://openresearch-repository.anu.edu.au/bitstream/1885/92740/6/01_Kalsbeek_From_source_migmatites_to_to_2001.pdf.jpg unknown Elsevier 0024-4937 http://hdl.handle.net/1885/92740 doi:10.1016/S0024-4937(00)00071-2 https://openresearch-repository.anu.edu.au/bitstream/1885/92740/6/01_Kalsbeek_From_source_migmatites_to_to_2001.pdf.jpg Lithos Keywords: anatexis granite migmatite orogenic belt pluton S-type rock tectonic setting Greenland Anatexis Caledonian Orogen Geochronology Greenland Journal article ftanucanberra https://doi.org/10.1016/S0024-4937(00)00071-2 2023-12-15T09:36:31Z In the Caledonian orogen of East Greenland, superb exposure along steep fjord walls allows direct observation of the origin of ca. 435 Ma S-type granites by anatexis of paragneisses, and collection of the resulting melts into wider sheets and plutons. Field observations suggest that 'fertile' metasediments of the late Mesoproterozoic Krummedal supracrustal sequence were the source of the granites, and there is no evidence of participation of the 'less fertile' Archaean and Palaeoproterozoic orthogneisses in the region. Comparison of inherited zircons in the granites with detrital zircons in the metasediments by SHRIMP, as well as chemical analyses and Rb-Sr isotope data, support this contention. In addition to the ca. 435 Ma granites, ca. 930 Ma S-type granites are also present: The two age groups cannot always be differentiated on field criteria. The formation of late Caledonian plutons may have been triggered by decompression during gravitational collapse following crustal thickening by Caledonian collision, but structural relationships are too complex to allow a precise interpretation of the tectonic setting of most granites. Article in Journal/Newspaper East Greenland Greenland Australian National University: ANU Digital Collections Greenland Lithos 57 1 1 21 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: anatexis granite migmatite orogenic belt pluton S-type rock tectonic setting Greenland Anatexis Caledonian Orogen Geochronology Greenland |
spellingShingle |
Keywords: anatexis granite migmatite orogenic belt pluton S-type rock tectonic setting Greenland Anatexis Caledonian Orogen Geochronology Greenland Kalsbeek, Feiko Jepsen, H Nutman, Allen From source migmatites to to plutons: tracking the origin of ca. 435 Ma S-type granites in the East Greenland Caledonian orogen |
topic_facet |
Keywords: anatexis granite migmatite orogenic belt pluton S-type rock tectonic setting Greenland Anatexis Caledonian Orogen Geochronology Greenland |
description |
In the Caledonian orogen of East Greenland, superb exposure along steep fjord walls allows direct observation of the origin of ca. 435 Ma S-type granites by anatexis of paragneisses, and collection of the resulting melts into wider sheets and plutons. Field observations suggest that 'fertile' metasediments of the late Mesoproterozoic Krummedal supracrustal sequence were the source of the granites, and there is no evidence of participation of the 'less fertile' Archaean and Palaeoproterozoic orthogneisses in the region. Comparison of inherited zircons in the granites with detrital zircons in the metasediments by SHRIMP, as well as chemical analyses and Rb-Sr isotope data, support this contention. In addition to the ca. 435 Ma granites, ca. 930 Ma S-type granites are also present: The two age groups cannot always be differentiated on field criteria. The formation of late Caledonian plutons may have been triggered by decompression during gravitational collapse following crustal thickening by Caledonian collision, but structural relationships are too complex to allow a precise interpretation of the tectonic setting of most granites. |
format |
Article in Journal/Newspaper |
author |
Kalsbeek, Feiko Jepsen, H Nutman, Allen |
author_facet |
Kalsbeek, Feiko Jepsen, H Nutman, Allen |
author_sort |
Kalsbeek, Feiko |
title |
From source migmatites to to plutons: tracking the origin of ca. 435 Ma S-type granites in the East Greenland Caledonian orogen |
title_short |
From source migmatites to to plutons: tracking the origin of ca. 435 Ma S-type granites in the East Greenland Caledonian orogen |
title_full |
From source migmatites to to plutons: tracking the origin of ca. 435 Ma S-type granites in the East Greenland Caledonian orogen |
title_fullStr |
From source migmatites to to plutons: tracking the origin of ca. 435 Ma S-type granites in the East Greenland Caledonian orogen |
title_full_unstemmed |
From source migmatites to to plutons: tracking the origin of ca. 435 Ma S-type granites in the East Greenland Caledonian orogen |
title_sort |
from source migmatites to to plutons: tracking the origin of ca. 435 ma s-type granites in the east greenland caledonian orogen |
publisher |
Elsevier |
url |
http://hdl.handle.net/1885/92740 https://doi.org/10.1016/S0024-4937(00)00071-2 https://openresearch-repository.anu.edu.au/bitstream/1885/92740/6/01_Kalsbeek_From_source_migmatites_to_to_2001.pdf.jpg |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland Greenland |
genre_facet |
East Greenland Greenland |
op_source |
Lithos |
op_relation |
0024-4937 http://hdl.handle.net/1885/92740 doi:10.1016/S0024-4937(00)00071-2 https://openresearch-repository.anu.edu.au/bitstream/1885/92740/6/01_Kalsbeek_From_source_migmatites_to_to_2001.pdf.jpg |
op_doi |
https://doi.org/10.1016/S0024-4937(00)00071-2 |
container_title |
Lithos |
container_volume |
57 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
21 |
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1788060978482511872 |