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/69Ar age determinations from the Kerguelen Plateau, Broken Ridge, Rajmahal Traps, and Bunbury basalts, and of Indian and Antarctic dikes help...
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ftuglasgow:oai:eprints.gla.ac.uk:445 2024-06-02T07:56:39+00:00 Kerguelen hotspot magma output since 130 Ma Coffin, M.F. Storey, M. Müller, R.D. Gahagan, L.A. Pringle, M. Duncan, R.A. Gladczenko, T.P. 2002 https://eprints.gla.ac.uk/445/ http://petrology.oupjournals.org/cgi/content/full/43/7/1121 unknown Coffin, M.F., Storey, M., Müller, R.D., Gahagan, L.A., Pringle, M., Duncan, R.A. and Gladczenko, T.P. (2002) Kerguelen hotspot magma output since 130 Ma. Journal of Petrology <https://eprints.gla.ac.uk/view/journal_volume/Journal_of_Petrology.html>, 43(7), pp. 1120-1140. (doi:10.1093/petrology/43.7.1121 <https://doi.org/10.1093/petrology/43.7.1121>) QE Geology Articles PeerReviewed 2002 ftuglasgow https://doi.org/10.1093/petrology/43.7.1121 2024-05-06T14:55:59Z 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/69Ar age determinations from the Kerguelen Plateau, Broken Ridge, Rajmahal Traps, and Bunbury basalts, and of Indian and Antarctic dikes help to document the hotspot's 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 gt/eq 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 University of Glasgow: Enlighten - Publications 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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University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
unknown |
topic |
QE Geology |
spellingShingle |
QE Geology Coffin, M.F. Storey, M. Müller, R.D. Gahagan, L.A. Pringle, M. Duncan, R.A. Gladczenko, T.P. Kerguelen hotspot magma output since 130 Ma |
topic_facet |
QE Geology |
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/69Ar age determinations from the Kerguelen Plateau, Broken Ridge, Rajmahal Traps, and Bunbury basalts, and of Indian and Antarctic dikes help to document the hotspot's 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 gt/eq 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, M.F. Storey, M. Müller, R.D. Gahagan, L.A. Pringle, M. Duncan, R.A. Gladczenko, T.P. |
author_facet |
Coffin, M.F. Storey, M. Müller, R.D. Gahagan, L.A. Pringle, M. Duncan, R.A. Gladczenko, T.P. |
author_sort |
Coffin, M.F. |
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 |
publishDate |
2002 |
url |
https://eprints.gla.ac.uk/445/ http://petrology.oupjournals.org/cgi/content/full/43/7/1121 |
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 |
Coffin, M.F., Storey, M., Müller, R.D., Gahagan, L.A., Pringle, M., Duncan, R.A. and Gladczenko, T.P. (2002) Kerguelen hotspot magma output since 130 Ma. Journal of Petrology <https://eprints.gla.ac.uk/view/journal_volume/Journal_of_Petrology.html>, 43(7), pp. 1120-1140. (doi:10.1093/petrology/43.7.1121 <https://doi.org/10.1093/petrology/43.7.1121>) |
op_doi |
https://doi.org/10.1093/petrology/43.7.1121 |
container_title |
Journal of Petrology |
container_volume |
43 |
container_issue |
7 |
container_start_page |
1121 |
op_container_end_page |
1137 |
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1800757595680538624 |