The petrology and petrogenesis of the North Motzfeldt Centre, Gardar Province, South Greenland
The Carnegie Trust for the Universities of Scotland, The Percy Sladen Trust, The Royal Geographical Society, The Mineralogical Society of Great Britain and Ireland, NERC and the University of Luton gave financial assistance for the present study. Radiometric studies formed part of a collaborative pr...
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Online Access: | http://hdl.handle.net/10023/17016 https://doi.org/10.1180/0026461016560007 |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/17016 2023-07-02T03:32:25+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 University of St Andrews. School of Earth & Environmental Sciences University of St Andrews. Scottish Oceans Institute University of St Andrews. St Andrews Isotope Geochemistry 2002-12-01 16 application/pdf http://hdl.handle.net/10023/17016 https://doi.org/10.1180/0026461016560007 eng eng Mineralogical Magazine 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 0026-461X PURE: 786481 PURE UUID: 91d7dc41-4864-43fa-8b9e-a510c83663d9 WOS: 000172705200007 Scopus: 0035655636 ORCID: /0000-0002-3689-1517/work/53857082 http://hdl.handle.net/10023/17016 https://doi.org/10.1180/0026461016560007 Copyright © The Mineralogical Society. his work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://doi.org/10.1180/0026461016560007 Gardar Ketilidian Nepheline syenite Magma chamber Roof zones QE Geology QE Journal article 2002 ftstandrewserep https://doi.org/10.1180/0026461016560007 2023-06-13T18:29:39Z The Carnegie Trust for the Universities of Scotland, The Percy Sladen Trust, The Royal Geographical Society, The Mineralogical Society of Great Britain and Ireland, NERC and the University of Luton gave financial assistance for the present study. Radiometric studies formed part of a collaborative programme between AAF and TA funded by the British Council. 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. Publisher PDF Peer reviewed Article in Journal/Newspaper Greenland Igaliko Igaliku University of St Andrews: Digital Research Repository Greenland Igaliku ENVELOPE(-45.421,-45.421,60.988,60.988) Percy ENVELOPE(-55.883,-55.883,-63.250,-63.250) Sladen ENVELOPE(-45.281,-45.281,-60.675,-60.675) Mineralogical Magazine 65 6 759 774 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Gardar Ketilidian Nepheline syenite Magma chamber Roof zones QE Geology QE |
spellingShingle |
Gardar Ketilidian Nepheline syenite Magma chamber Roof zones QE Geology QE 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 QE Geology QE |
description |
The Carnegie Trust for the Universities of Scotland, The Percy Sladen Trust, The Royal Geographical Society, The Mineralogical Society of Great Britain and Ireland, NERC and the University of Luton gave financial assistance for the present study. Radiometric studies formed part of a collaborative programme between AAF and TA funded by the British Council. 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. Publisher PDF Peer reviewed |
author2 |
University of St Andrews. School of Earth & Environmental Sciences University of St Andrews. Scottish Oceans Institute University of St Andrews. St Andrews Isotope Geochemistry |
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 |
2002 |
url |
http://hdl.handle.net/10023/17016 https://doi.org/10.1180/0026461016560007 |
long_lat |
ENVELOPE(-45.421,-45.421,60.988,60.988) ENVELOPE(-55.883,-55.883,-63.250,-63.250) ENVELOPE(-45.281,-45.281,-60.675,-60.675) |
geographic |
Greenland Igaliku Percy Sladen |
geographic_facet |
Greenland Igaliku Percy Sladen |
genre |
Greenland Igaliko Igaliku |
genre_facet |
Greenland Igaliko Igaliku |
op_relation |
Mineralogical Magazine 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 0026-461X PURE: 786481 PURE UUID: 91d7dc41-4864-43fa-8b9e-a510c83663d9 WOS: 000172705200007 Scopus: 0035655636 ORCID: /0000-0002-3689-1517/work/53857082 http://hdl.handle.net/10023/17016 https://doi.org/10.1180/0026461016560007 |
op_rights |
Copyright © The Mineralogical Society. his work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://doi.org/10.1180/0026461016560007 |
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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1770272001594753024 |