Mobilization of fluidized sediment during sill emplacement, western Dronning Maud Land, East Antarctica
Large mafic sills in the Ahlmannryggen region of western Dronning Maud Land were intruded into partially lithified sediments of the mid-Proterozoic Ritscherflya Supergroup. Clastic sedimentary dykes intruding the thick mafic sills have been identified, and show evidence for fluidization of the parti...
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Cambridge University Press
2003
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Online Access: | http://nora.nerc.ac.uk/id/eprint/12735/ |
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ftnerc:oai:nora.nerc.ac.uk:12735 2023-05-15T13:45:11+02:00 Mobilization of fluidized sediment during sill emplacement, western Dronning Maud Land, East Antarctica Curtis, Michael L. Riley, Teal R. 2003 http://nora.nerc.ac.uk/id/eprint/12735/ unknown Cambridge University Press Curtis, Michael L.; Riley, Teal R. orcid:0000-0002-3333-5021 . 2003 Mobilization of fluidized sediment during sill emplacement, western Dronning Maud Land, East Antarctica. Antarctic Science, 15 (3). 393-398. https://doi.org/10.1017/S0954102003001408 <https://doi.org/10.1017/S0954102003001408> Earth Sciences Publication - Article PeerReviewed 2003 ftnerc https://doi.org/10.1017/S0954102003001408 2023-02-04T19:28:09Z Large mafic sills in the Ahlmannryggen region of western Dronning Maud Land were intruded into partially lithified sediments of the mid-Proterozoic Ritscherflya Supergroup. Clastic sedimentary dykes intruding the thick mafic sills have been identified, and show evidence for fluidization of the partially lithified sediments. Previous work had demonstrated in situ fluidization and localized anatectic melting. This study demonstrates mobilization of the fluidized sediments, with penetration at least 50 in into the fractured, intruding sill. Physical features within the clastic dykes (e.g. sediment balls, flame structures) suggest that the sediments were largely unconsolidated, or at most only partially lithified. The presence of a thin zone of anatectic melt along the dyke-sill contact suggests that the mafic sill was still hot (c. 700degreesC) at the time of sedimentary dyke injection. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Dronning Maud Land East Antarctica Natural Environment Research Council: NERC Open Research Archive Ahlmannryggen ENVELOPE(-2.500,-2.500,-71.833,-71.833) Dronning Maud Land East Antarctica Ritscherflya ENVELOPE(-9.000,-9.000,-73.000,-73.000) Antarctic Science 15 3 393 398 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Curtis, Michael L. Riley, Teal R. Mobilization of fluidized sediment during sill emplacement, western Dronning Maud Land, East Antarctica |
topic_facet |
Earth Sciences |
description |
Large mafic sills in the Ahlmannryggen region of western Dronning Maud Land were intruded into partially lithified sediments of the mid-Proterozoic Ritscherflya Supergroup. Clastic sedimentary dykes intruding the thick mafic sills have been identified, and show evidence for fluidization of the partially lithified sediments. Previous work had demonstrated in situ fluidization and localized anatectic melting. This study demonstrates mobilization of the fluidized sediments, with penetration at least 50 in into the fractured, intruding sill. Physical features within the clastic dykes (e.g. sediment balls, flame structures) suggest that the sediments were largely unconsolidated, or at most only partially lithified. The presence of a thin zone of anatectic melt along the dyke-sill contact suggests that the mafic sill was still hot (c. 700degreesC) at the time of sedimentary dyke injection. |
format |
Article in Journal/Newspaper |
author |
Curtis, Michael L. Riley, Teal R. |
author_facet |
Curtis, Michael L. Riley, Teal R. |
author_sort |
Curtis, Michael L. |
title |
Mobilization of fluidized sediment during sill emplacement, western Dronning Maud Land, East Antarctica |
title_short |
Mobilization of fluidized sediment during sill emplacement, western Dronning Maud Land, East Antarctica |
title_full |
Mobilization of fluidized sediment during sill emplacement, western Dronning Maud Land, East Antarctica |
title_fullStr |
Mobilization of fluidized sediment during sill emplacement, western Dronning Maud Land, East Antarctica |
title_full_unstemmed |
Mobilization of fluidized sediment during sill emplacement, western Dronning Maud Land, East Antarctica |
title_sort |
mobilization of fluidized sediment during sill emplacement, western dronning maud land, east antarctica |
publisher |
Cambridge University Press |
publishDate |
2003 |
url |
http://nora.nerc.ac.uk/id/eprint/12735/ |
long_lat |
ENVELOPE(-2.500,-2.500,-71.833,-71.833) ENVELOPE(-9.000,-9.000,-73.000,-73.000) |
geographic |
Ahlmannryggen Dronning Maud Land East Antarctica Ritscherflya |
geographic_facet |
Ahlmannryggen Dronning Maud Land East Antarctica Ritscherflya |
genre |
Antarc* Antarctic Science Antarctica Dronning Maud Land East Antarctica |
genre_facet |
Antarc* Antarctic Science Antarctica Dronning Maud Land East Antarctica |
op_relation |
Curtis, Michael L.; Riley, Teal R. orcid:0000-0002-3333-5021 . 2003 Mobilization of fluidized sediment during sill emplacement, western Dronning Maud Land, East Antarctica. Antarctic Science, 15 (3). 393-398. https://doi.org/10.1017/S0954102003001408 <https://doi.org/10.1017/S0954102003001408> |
op_doi |
https://doi.org/10.1017/S0954102003001408 |
container_title |
Antarctic Science |
container_volume |
15 |
container_issue |
3 |
container_start_page |
393 |
op_container_end_page |
398 |
_version_ |
1766215227861368832 |