A Textural Record of Solidification and Cooling in the Skaergaard Intrusion, East Greenland.
The clinopyroxene^plagioclase^plagioclase dihedral angle, cpp, in gabbroic cumulates records the time-integrated thermal history in the sub-solidus and provides a measure of textural maturity. Variations in cpp through the Layered Series of the Skaergaard intrusion, East Greenland, demonstrate that...
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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:403 2023-05-15T16:03:37+02:00 A Textural Record of Solidification and Cooling in the Skaergaard Intrusion, East Greenland. Holness, M. B. Tegner, C. Nielsen, T. F. D. Stripp, G. R. Morse, S. A. 2007 application/pdf http://eprints.esc.cam.ac.uk/403/ http://eprints.esc.cam.ac.uk/403/1/HolnessATextural.pdf http://petrology.oxfordjournals.org/cgi/content/abstract/48/12/2359 https://doi.org/10.1093/petrology/egm064 en eng http://eprints.esc.cam.ac.uk/403/1/HolnessATextural.pdf Holness, M. B. and Tegner, C. and Nielsen, T. F. D. and Stripp, G. R. and Morse, S. A. (2007) A Textural Record of Solidification and Cooling in the Skaergaard Intrusion, East Greenland. Journal of Petrology, 48 (12). pp. 2359-2377. DOI https://doi.org/10.1093/petrology/egm064 <https://doi.org/10.1093/petrology/egm064> Article PeerReviewed 2007 ftucambridgeesc https://doi.org/10.1093/petrology/egm064 2020-08-27T18:08:30Z The clinopyroxene^plagioclase^plagioclase dihedral angle, cpp, in gabbroic cumulates records the time-integrated thermal history in the sub-solidus and provides a measure of textural maturity. Variations in cpp through the Layered Series of the Skaergaard intrusion, East Greenland, demonstrate that the onset of crystallization of clinopyroxene (within LZa), Fe^Ti oxides (at the base of LZc) and apatite (at the base of UZb) as liquidus phases in the bulk magma is recorded by a stepwise increase in textural maturity, related to an increase in the contribution of latent heat to the total heat loss to the surroundings and a reduction in the specific cooling rate at the crystallization front of the intrusion. The onset of both liquidus Fe^Ti oxide and apatite crystallization is marked by a transient increase in textural maturity, probably linked to overstepping before nucleation. Textural maturation at pyroxene^plagioclase^plagioclase triple junctions effectively ceases in the uppermost parts of the Layered Series as a result of the entire pluton cooling below the closure temperature for dihedral angle change, which is 10758C. Solidification of the Layered Series of the Skaergaard intrusion occurred via the upwards propagation of a mush zone only a few metres thick. Article in Journal/Newspaper East Greenland Greenland University of Cambridge, Department of Earth Sciences: ESC Publications Greenland Journal of Petrology 48 12 2359 2377 |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
description |
The clinopyroxene^plagioclase^plagioclase dihedral angle, cpp, in gabbroic cumulates records the time-integrated thermal history in the sub-solidus and provides a measure of textural maturity. Variations in cpp through the Layered Series of the Skaergaard intrusion, East Greenland, demonstrate that the onset of crystallization of clinopyroxene (within LZa), Fe^Ti oxides (at the base of LZc) and apatite (at the base of UZb) as liquidus phases in the bulk magma is recorded by a stepwise increase in textural maturity, related to an increase in the contribution of latent heat to the total heat loss to the surroundings and a reduction in the specific cooling rate at the crystallization front of the intrusion. The onset of both liquidus Fe^Ti oxide and apatite crystallization is marked by a transient increase in textural maturity, probably linked to overstepping before nucleation. Textural maturation at pyroxene^plagioclase^plagioclase triple junctions effectively ceases in the uppermost parts of the Layered Series as a result of the entire pluton cooling below the closure temperature for dihedral angle change, which is 10758C. Solidification of the Layered Series of the Skaergaard intrusion occurred via the upwards propagation of a mush zone only a few metres thick. |
format |
Article in Journal/Newspaper |
author |
Holness, M. B. Tegner, C. Nielsen, T. F. D. Stripp, G. R. Morse, S. A. |
spellingShingle |
Holness, M. B. Tegner, C. Nielsen, T. F. D. Stripp, G. R. Morse, S. A. A Textural Record of Solidification and Cooling in the Skaergaard Intrusion, East Greenland. |
author_facet |
Holness, M. B. Tegner, C. Nielsen, T. F. D. Stripp, G. R. Morse, S. A. |
author_sort |
Holness, M. B. |
title |
A Textural Record of Solidification and Cooling in the Skaergaard Intrusion, East Greenland. |
title_short |
A Textural Record of Solidification and Cooling in the Skaergaard Intrusion, East Greenland. |
title_full |
A Textural Record of Solidification and Cooling in the Skaergaard Intrusion, East Greenland. |
title_fullStr |
A Textural Record of Solidification and Cooling in the Skaergaard Intrusion, East Greenland. |
title_full_unstemmed |
A Textural Record of Solidification and Cooling in the Skaergaard Intrusion, East Greenland. |
title_sort |
textural record of solidification and cooling in the skaergaard intrusion, east greenland. |
publishDate |
2007 |
url |
http://eprints.esc.cam.ac.uk/403/ http://eprints.esc.cam.ac.uk/403/1/HolnessATextural.pdf http://petrology.oxfordjournals.org/cgi/content/abstract/48/12/2359 https://doi.org/10.1093/petrology/egm064 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland Greenland |
genre_facet |
East Greenland Greenland |
op_relation |
http://eprints.esc.cam.ac.uk/403/1/HolnessATextural.pdf Holness, M. B. and Tegner, C. and Nielsen, T. F. D. and Stripp, G. R. and Morse, S. A. (2007) A Textural Record of Solidification and Cooling in the Skaergaard Intrusion, East Greenland. Journal of Petrology, 48 (12). pp. 2359-2377. DOI https://doi.org/10.1093/petrology/egm064 <https://doi.org/10.1093/petrology/egm064> |
op_doi |
https://doi.org/10.1093/petrology/egm064 |
container_title |
Journal of Petrology |
container_volume |
48 |
container_issue |
12 |
container_start_page |
2359 |
op_container_end_page |
2377 |
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1766399314898190336 |