Formation and transformation of mixed-layer minerals by tertiary intrusives in cretaceous mudstones, West Greenland
In the Nuussuaq Basin, West Greenland, a thick succession of Tertiary dolerites has penetrated Upper Cretaceous mudstone. The mixed-layer minerals of mudstone core samples have been analyzed by X-ray diffraction, solid-state 29Si and 27Al magic-angle spinning nuclear magnetic resonance, Mössbauer an...
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ftuglasgow:oai:eprints.gla.ac.uk:11663 2024-06-02T08:07:27+00:00 Formation and transformation of mixed-layer minerals by tertiary intrusives in cretaceous mudstones, West Greenland Drits, V.A. Lindgreen, H. Sakharov, B.A. Jørgen, H. Fallick, A.E. Salyn, A.L. Dainyak, L.G. Zviagina, B.B. Barfod, D.N. 2007-06 https://eprints.gla.ac.uk/11663/ unknown Drits, V.A., Lindgreen, H., Sakharov, B.A., Jørgen, H., Fallick, A.E. <http://eprints.gla.ac.uk/view/author/1774.html>, Salyn, A.L., Dainyak, L.G., Zviagina, B.B. and Barfod, D.N. <http://eprints.gla.ac.uk/view/author/4012.html> (2007) Formation and transformation of mixed-layer minerals by tertiary intrusives in cretaceous mudstones, West Greenland. Clays and Clay Minerals <https://eprints.gla.ac.uk/view/journal_volume/Clays_and_Clay_Minerals.html>, 55(3), pp. 260-283. (doi:10.1346/CCMN.2007.0550304 <https://doi.org/10.1346/CCMN.2007.0550304>) QE Geology Articles PeerReviewed 2007 ftuglasgow https://doi.org/10.1346/CCMN.2007.0550304 2024-05-06T15:08:16Z In the Nuussuaq Basin, West Greenland, a thick succession of Tertiary dolerites has penetrated Upper Cretaceous mudstone. The mixed-layer minerals of mudstone core samples have been analyzed by X-ray diffraction, solid-state 29Si and 27Al magic-angle spinning nuclear magnetic resonance, Mössbauer and infrared spectroscopies, thermal analysis, chemical analysis, stable isotopes (18O/16O), and K/Ar dating. The mixed-layer minerals include for each sample two mixed-layer phases consisting of pyrophyllite, margarite, paragonite, tobelite, illite, smectite and vermiculite layers. The main, 80 m thick intrusion resulted in the formation of pyrophyllite, margarite, paragonite and tobelite layers. However, the tobelite layers are absent in samples <21 m from this intrusion. Furthermore, chlorite was formed and kaolinite destroyed in samples adjacent to minor intrusions and at distances <60 m from the large intrusion. For the first time, the detailed, complex mixed-layer structures formed during contact metamorphism of kaolinitic, oil-forming mudstones have been investigated accurately. The formation of tobelite layers reveals that oil formation has taken place during contact metamorphism. Furthermore, K/Ar dating of mixed-layer minerals from shale indicates that the intrusives are of early Eocene age. The 80 m thick intrusive is responsible for the main mixed-layer transformations, whereas two thin (3 m and 0.5 m thick) intrusions contribute little. Thus, the detailed mixed-layer investigation has contributed significantly to the understanding of the regional geology and the contact metamorphic processes. Article in Journal/Newspaper Greenland Nuussuaq University of Glasgow: Enlighten - Publications Greenland Nuussuaq ENVELOPE(-51.918,-51.918,66.626,66.626) Clays and Clay Minerals 55 3 260 283 |
institution |
Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
unknown |
topic |
QE Geology |
spellingShingle |
QE Geology Drits, V.A. Lindgreen, H. Sakharov, B.A. Jørgen, H. Fallick, A.E. Salyn, A.L. Dainyak, L.G. Zviagina, B.B. Barfod, D.N. Formation and transformation of mixed-layer minerals by tertiary intrusives in cretaceous mudstones, West Greenland |
topic_facet |
QE Geology |
description |
In the Nuussuaq Basin, West Greenland, a thick succession of Tertiary dolerites has penetrated Upper Cretaceous mudstone. The mixed-layer minerals of mudstone core samples have been analyzed by X-ray diffraction, solid-state 29Si and 27Al magic-angle spinning nuclear magnetic resonance, Mössbauer and infrared spectroscopies, thermal analysis, chemical analysis, stable isotopes (18O/16O), and K/Ar dating. The mixed-layer minerals include for each sample two mixed-layer phases consisting of pyrophyllite, margarite, paragonite, tobelite, illite, smectite and vermiculite layers. The main, 80 m thick intrusion resulted in the formation of pyrophyllite, margarite, paragonite and tobelite layers. However, the tobelite layers are absent in samples <21 m from this intrusion. Furthermore, chlorite was formed and kaolinite destroyed in samples adjacent to minor intrusions and at distances <60 m from the large intrusion. For the first time, the detailed, complex mixed-layer structures formed during contact metamorphism of kaolinitic, oil-forming mudstones have been investigated accurately. The formation of tobelite layers reveals that oil formation has taken place during contact metamorphism. Furthermore, K/Ar dating of mixed-layer minerals from shale indicates that the intrusives are of early Eocene age. The 80 m thick intrusive is responsible for the main mixed-layer transformations, whereas two thin (3 m and 0.5 m thick) intrusions contribute little. Thus, the detailed mixed-layer investigation has contributed significantly to the understanding of the regional geology and the contact metamorphic processes. |
format |
Article in Journal/Newspaper |
author |
Drits, V.A. Lindgreen, H. Sakharov, B.A. Jørgen, H. Fallick, A.E. Salyn, A.L. Dainyak, L.G. Zviagina, B.B. Barfod, D.N. |
author_facet |
Drits, V.A. Lindgreen, H. Sakharov, B.A. Jørgen, H. Fallick, A.E. Salyn, A.L. Dainyak, L.G. Zviagina, B.B. Barfod, D.N. |
author_sort |
Drits, V.A. |
title |
Formation and transformation of mixed-layer minerals by tertiary intrusives in cretaceous mudstones, West Greenland |
title_short |
Formation and transformation of mixed-layer minerals by tertiary intrusives in cretaceous mudstones, West Greenland |
title_full |
Formation and transformation of mixed-layer minerals by tertiary intrusives in cretaceous mudstones, West Greenland |
title_fullStr |
Formation and transformation of mixed-layer minerals by tertiary intrusives in cretaceous mudstones, West Greenland |
title_full_unstemmed |
Formation and transformation of mixed-layer minerals by tertiary intrusives in cretaceous mudstones, West Greenland |
title_sort |
formation and transformation of mixed-layer minerals by tertiary intrusives in cretaceous mudstones, west greenland |
publishDate |
2007 |
url |
https://eprints.gla.ac.uk/11663/ |
long_lat |
ENVELOPE(-51.918,-51.918,66.626,66.626) |
geographic |
Greenland Nuussuaq |
geographic_facet |
Greenland Nuussuaq |
genre |
Greenland Nuussuaq |
genre_facet |
Greenland Nuussuaq |
op_relation |
Drits, V.A., Lindgreen, H., Sakharov, B.A., Jørgen, H., Fallick, A.E. <http://eprints.gla.ac.uk/view/author/1774.html>, Salyn, A.L., Dainyak, L.G., Zviagina, B.B. and Barfod, D.N. <http://eprints.gla.ac.uk/view/author/4012.html> (2007) Formation and transformation of mixed-layer minerals by tertiary intrusives in cretaceous mudstones, West Greenland. Clays and Clay Minerals <https://eprints.gla.ac.uk/view/journal_volume/Clays_and_Clay_Minerals.html>, 55(3), pp. 260-283. (doi:10.1346/CCMN.2007.0550304 <https://doi.org/10.1346/CCMN.2007.0550304>) |
op_doi |
https://doi.org/10.1346/CCMN.2007.0550304 |
container_title |
Clays and Clay Minerals |
container_volume |
55 |
container_issue |
3 |
container_start_page |
260 |
op_container_end_page |
283 |
_version_ |
1800752539906342912 |