Kerguelen hotspot magma output since 130 Ma
The Kerguelen hotspot (Indian Ocean) has produced basalt for 130 Myr, among the longest known volcanic records from a single source. New and published 40Ar/39Ar age determinations from the Kerguelen Plateau, Broken Ridge, Rajmahal Traps, and Bunbury basalts, and of Indian and Antarctic dikes help to...
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Online Access: | https://doi.org/10.1093/petrology/43.7.1121 http://ecite.utas.edu.au/73820 |
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ftunivtasecite:oai:ecite.utas.edu.au:73820 2023-05-15T14:02:30+02:00 Kerguelen hotspot magma output since 130 Ma Coffin, MF Pringle, MS Duncan, RA Gladczenko, TP Storey, M Muller, RD Gahagan, LA 2002 application/pdf https://doi.org/10.1093/petrology/43.7.1121 http://ecite.utas.edu.au/73820 en eng Oxford Univ Press http://ecite.utas.edu.au/73820/1/Coffin_et_al_JPetrology_2002.pdf http://dx.doi.org/10.1093/petrology/43.7.1121 Coffin, MF and Pringle, MS and Duncan, RA and Gladczenko, TP and Storey, M and Muller, RD and Gahagan, LA, Kerguelen hotspot magma output since 130 Ma, Journal of Petrology, 43, (7) pp. 1121-1139. ISSN 0022-3530 (2002) [Refereed Article] http://ecite.utas.edu.au/73820 Earth Sciences Geology Marine Geoscience Refereed Article PeerReviewed 2002 ftunivtasecite https://doi.org/10.1093/petrology/43.7.1121 2019-12-13T21:40:52Z The Kerguelen hotspot (Indian Ocean) has produced basalt for 130 Myr, among the longest known volcanic records from a single source. New and published 40Ar/39Ar age determinations from the Kerguelen Plateau, Broken Ridge, Rajmahal Traps, and Bunbury basalts, and of Indian and Antarctic dikes help to document the hotspots history. Using radiometric dates and crustal structure determined from geophysical data and drilling results, we calculate the magmatic output of the Kerguelen hotspot through time. Output rates have varied in ways not predicted by current geodynamic models; maximum eruption volumes postdate the initial surface manifestation of the hotspot as well as break-up between Antarctica and India by 15 Myr, and magma output rates were high, as well as geographically diverse, over an interval of 25 Myr, from 120 to 95 Ma. We propose two alternatives to the standard mantle plume paradigm, one involving multiple plume sources, and another consisting of a single, but dismembered plume source. Article in Journal/Newspaper Antarc* Antarctic Antarctica eCite UTAS (University of Tasmania) Antarctic Broken Ridge ENVELOPE(-92.318,-92.318,79.552,79.552) Indian Kerguelen Journal of Petrology 43 7 1121 1137 |
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Open Polar |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Earth Sciences Geology Marine Geoscience |
spellingShingle |
Earth Sciences Geology Marine Geoscience Coffin, MF Pringle, MS Duncan, RA Gladczenko, TP Storey, M Muller, RD Gahagan, LA Kerguelen hotspot magma output since 130 Ma |
topic_facet |
Earth Sciences Geology Marine Geoscience |
description |
The Kerguelen hotspot (Indian Ocean) has produced basalt for 130 Myr, among the longest known volcanic records from a single source. New and published 40Ar/39Ar age determinations from the Kerguelen Plateau, Broken Ridge, Rajmahal Traps, and Bunbury basalts, and of Indian and Antarctic dikes help to document the hotspots history. Using radiometric dates and crustal structure determined from geophysical data and drilling results, we calculate the magmatic output of the Kerguelen hotspot through time. Output rates have varied in ways not predicted by current geodynamic models; maximum eruption volumes postdate the initial surface manifestation of the hotspot as well as break-up between Antarctica and India by 15 Myr, and magma output rates were high, as well as geographically diverse, over an interval of 25 Myr, from 120 to 95 Ma. We propose two alternatives to the standard mantle plume paradigm, one involving multiple plume sources, and another consisting of a single, but dismembered plume source. |
format |
Article in Journal/Newspaper |
author |
Coffin, MF Pringle, MS Duncan, RA Gladczenko, TP Storey, M Muller, RD Gahagan, LA |
author_facet |
Coffin, MF Pringle, MS Duncan, RA Gladczenko, TP Storey, M Muller, RD Gahagan, LA |
author_sort |
Coffin, MF |
title |
Kerguelen hotspot magma output since 130 Ma |
title_short |
Kerguelen hotspot magma output since 130 Ma |
title_full |
Kerguelen hotspot magma output since 130 Ma |
title_fullStr |
Kerguelen hotspot magma output since 130 Ma |
title_full_unstemmed |
Kerguelen hotspot magma output since 130 Ma |
title_sort |
kerguelen hotspot magma output since 130 ma |
publisher |
Oxford Univ Press |
publishDate |
2002 |
url |
https://doi.org/10.1093/petrology/43.7.1121 http://ecite.utas.edu.au/73820 |
long_lat |
ENVELOPE(-92.318,-92.318,79.552,79.552) |
geographic |
Antarctic Broken Ridge Indian Kerguelen |
geographic_facet |
Antarctic Broken Ridge Indian Kerguelen |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://ecite.utas.edu.au/73820/1/Coffin_et_al_JPetrology_2002.pdf http://dx.doi.org/10.1093/petrology/43.7.1121 Coffin, MF and Pringle, MS and Duncan, RA and Gladczenko, TP and Storey, M and Muller, RD and Gahagan, LA, Kerguelen hotspot magma output since 130 Ma, Journal of Petrology, 43, (7) pp. 1121-1139. ISSN 0022-3530 (2002) [Refereed Article] http://ecite.utas.edu.au/73820 |
op_doi |
https://doi.org/10.1093/petrology/43.7.1121 |
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Journal of Petrology |
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43 |
container_issue |
7 |
container_start_page |
1121 |
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1137 |
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