The petrology and petrogenesis of the North Motzfeldt Centre, Gardar Province, South Greenland
North Motzfeldt is an intrusive igneous centre within the Igaliku (formerly spelt Igaliko) complex, Gardar Province, South Greenland. A detailed field description of the centre is given, with preliminary geochemical and isotopic data. The North Motzfeldt centre is intruded into Ketilidian granitoid...
Published in: | Mineralogical Magazine |
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Language: | English |
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2001
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/the-petrology-and-petrogenesis-of-the-north-motzfeldt-centre-gardar-province-south-greenland(91d7dc41-4864-43fa-8b9e-a510c83663d9).html https://doi.org/10.1180/0026461016560007 https://research-repository.st-andrews.ac.uk/bitstream/10023/17016/1/Finch_et_al_2001_Min_Mag.pdf |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/91d7dc41-4864-43fa-8b9e-a510c83663d9 2023-05-15T16:27:57+02:00 The petrology and petrogenesis of the North Motzfeldt Centre, Gardar Province, South Greenland Finch, A. A. Goodenough, K M Salmon, H M Andersen, T 2001-12 application/pdf https://risweb.st-andrews.ac.uk/portal/en/researchoutput/the-petrology-and-petrogenesis-of-the-north-motzfeldt-centre-gardar-province-south-greenland(91d7dc41-4864-43fa-8b9e-a510c83663d9).html https://doi.org/10.1180/0026461016560007 https://research-repository.st-andrews.ac.uk/bitstream/10023/17016/1/Finch_et_al_2001_Min_Mag.pdf eng eng info:eu-repo/semantics/openAccess Finch , A A , Goodenough , K M , Salmon , H M & Andersen , T 2001 , ' The petrology and petrogenesis of the North Motzfeldt Centre, Gardar Province, South Greenland ' , Mineralogical Magazine , vol. 65 , no. 6 , pp. 759-774 . https://doi.org/10.1180/0026461016560007 Gardar Ketilidian Nepheline syenite Magma chamber Roof zones article 2001 ftunstandrewcris https://doi.org/10.1180/0026461016560007 2021-12-26T14:16:57Z North Motzfeldt is an intrusive igneous centre within the Igaliku (formerly spelt Igaliko) complex, Gardar Province, South Greenland. A detailed field description of the centre is given, with preliminary geochemical and isotopic data. The North Motzfeldt centre is intruded into Ketilidian granitoid basement rocks, and current exposure retains parts of the original roof against earlier Gardar eruptives and elastic sediments of the Eriksfjord formation. The unconformity between the Ketilidian and the overlying Eriksfjord is believed to have been crucial in the siting of the centre. The centre is subdivided into two major units, NM1 and NM2. This was followed by significant peralkaline nepheline microsyenite in sheets, characterized by rare element-rich accessory minerals including rinkite-mosandrite, pyrochlore and lavenite. A significant microsyenite body is called NM3. A preliminary Rb-Sr isochron of 1226 +/- 27 Ma indicates a far younger age for the centre than previously thought (similar to 1350 Ma). Cross-cutting relationships between North Motzfeldt and rocks of the adjacent Motzfeldt centre require a reappraisal of the chronology of Motzfeldt magmatism. We suggest that rocks previously believed to comprise the Motzfeldt centre represent the products of multiple phases of magmatism from Early- to Mid-Gardar times. Article in Journal/Newspaper Greenland Igaliko Igaliku University of St Andrews: Research Portal Greenland Igaliku ENVELOPE(-45.421,-45.421,60.988,60.988) Mineralogical Magazine 65 6 759 774 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Gardar Ketilidian Nepheline syenite Magma chamber Roof zones |
spellingShingle |
Gardar Ketilidian Nepheline syenite Magma chamber Roof zones Finch, A. A. Goodenough, K M Salmon, H M Andersen, T The petrology and petrogenesis of the North Motzfeldt Centre, Gardar Province, South Greenland |
topic_facet |
Gardar Ketilidian Nepheline syenite Magma chamber Roof zones |
description |
North Motzfeldt is an intrusive igneous centre within the Igaliku (formerly spelt Igaliko) complex, Gardar Province, South Greenland. A detailed field description of the centre is given, with preliminary geochemical and isotopic data. The North Motzfeldt centre is intruded into Ketilidian granitoid basement rocks, and current exposure retains parts of the original roof against earlier Gardar eruptives and elastic sediments of the Eriksfjord formation. The unconformity between the Ketilidian and the overlying Eriksfjord is believed to have been crucial in the siting of the centre. The centre is subdivided into two major units, NM1 and NM2. This was followed by significant peralkaline nepheline microsyenite in sheets, characterized by rare element-rich accessory minerals including rinkite-mosandrite, pyrochlore and lavenite. A significant microsyenite body is called NM3. A preliminary Rb-Sr isochron of 1226 +/- 27 Ma indicates a far younger age for the centre than previously thought (similar to 1350 Ma). Cross-cutting relationships between North Motzfeldt and rocks of the adjacent Motzfeldt centre require a reappraisal of the chronology of Motzfeldt magmatism. We suggest that rocks previously believed to comprise the Motzfeldt centre represent the products of multiple phases of magmatism from Early- to Mid-Gardar times. |
format |
Article in Journal/Newspaper |
author |
Finch, A. A. Goodenough, K M Salmon, H M Andersen, T |
author_facet |
Finch, A. A. Goodenough, K M Salmon, H M Andersen, T |
author_sort |
Finch, A. A. |
title |
The petrology and petrogenesis of the North Motzfeldt Centre, Gardar Province, South Greenland |
title_short |
The petrology and petrogenesis of the North Motzfeldt Centre, Gardar Province, South Greenland |
title_full |
The petrology and petrogenesis of the North Motzfeldt Centre, Gardar Province, South Greenland |
title_fullStr |
The petrology and petrogenesis of the North Motzfeldt Centre, Gardar Province, South Greenland |
title_full_unstemmed |
The petrology and petrogenesis of the North Motzfeldt Centre, Gardar Province, South Greenland |
title_sort |
petrology and petrogenesis of the north motzfeldt centre, gardar province, south greenland |
publishDate |
2001 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/the-petrology-and-petrogenesis-of-the-north-motzfeldt-centre-gardar-province-south-greenland(91d7dc41-4864-43fa-8b9e-a510c83663d9).html https://doi.org/10.1180/0026461016560007 https://research-repository.st-andrews.ac.uk/bitstream/10023/17016/1/Finch_et_al_2001_Min_Mag.pdf |
long_lat |
ENVELOPE(-45.421,-45.421,60.988,60.988) |
geographic |
Greenland Igaliku |
geographic_facet |
Greenland Igaliku |
genre |
Greenland Igaliko Igaliku |
genre_facet |
Greenland Igaliko Igaliku |
op_source |
Finch , A A , Goodenough , K M , Salmon , H M & Andersen , T 2001 , ' The petrology and petrogenesis of the North Motzfeldt Centre, Gardar Province, South Greenland ' , Mineralogical Magazine , vol. 65 , no. 6 , pp. 759-774 . https://doi.org/10.1180/0026461016560007 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1180/0026461016560007 |
container_title |
Mineralogical Magazine |
container_volume |
65 |
container_issue |
6 |
container_start_page |
759 |
op_container_end_page |
774 |
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1766017562130251776 |