Cenozoic intraplate volcanism on New Zealand: Upwelling induced by lithospheric removal
Diffuse intraplate volcanism spanning the Cenozoic on the North, South, Chatham, Auckland, Campbell and Antipodes Islands of New Zealand has produced quartz tholeiitic to basanitic/nephelinitic (including their differentiates) monogenetic volcanic fields and large shield volcanoes. New 40Ar/39Ar age...
Published in: | Earth and Planetary Science Letters |
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Elsevier
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Online Access: | https://oceanrep.geomar.de/id/eprint/683/ https://oceanrep.geomar.de/id/eprint/683/1/1-s2.0-S0012821X06004146-main.pdf https://doi.org/10.1016/j.epsl.2006.06.001 |
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ftoceanrep:oai:oceanrep.geomar.de:683 2024-09-30T14:27:22+00:00 Cenozoic intraplate volcanism on New Zealand: Upwelling induced by lithospheric removal Hoernle, Kaj White, J. D. L. van den Bogaard, Paul Hauff, Folkmar Coombs, D. S. Werner, Reinhard Timm, Christian Garbe-Schönberg, C.-Dieter Reay, A. Cooper, A. F. 2006 text https://oceanrep.geomar.de/id/eprint/683/ https://oceanrep.geomar.de/id/eprint/683/1/1-s2.0-S0012821X06004146-main.pdf https://doi.org/10.1016/j.epsl.2006.06.001 en eng Elsevier https://oceanrep.geomar.de/id/eprint/683/1/1-s2.0-S0012821X06004146-main.pdf Hoernle, K. , White, J. D. L., van den Bogaard, P., Hauff, F. , Coombs, D. S., Werner, R., Timm, C. , Garbe-Schönberg, C. D., Reay, A. and Cooper, A. F. (2006) Cenozoic intraplate volcanism on New Zealand: Upwelling induced by lithospheric removal. Earth and Planetary Science Letters, 248 (1-2). pp. 350-367. DOI 10.1016/j.epsl.2006.06.001 <https://doi.org/10.1016/j.epsl.2006.06.001>. doi:10.1016/j.epsl.2006.06.001 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2006 ftoceanrep https://doi.org/10.1016/j.epsl.2006.06.001 2024-09-04T05:04:40Z Diffuse intraplate volcanism spanning the Cenozoic on the North, South, Chatham, Auckland, Campbell and Antipodes Islands of New Zealand has produced quartz tholeiitic to basanitic/nephelinitic (including their differentiates) monogenetic volcanic fields and large shield volcanoes. New 40Ar/39Ar ages, combined with published age data, show no correlations among age, location or composition of the volcanoes. Continuous volcanism in restricted areas over long time periods, and a lack of volcanic age progressions in the direction and at the rate of plate motion, are inconsistent with a plume origin for the intraplate volcanism. Although localized extension took place during some episodes of volcanic activity, the degree of extension does not correlate with erupted volumes or compositions. Major and trace element data suggest that the silica-poor volcanic rocks (primarily basanites) were derived through low degrees of partial melting at deeper depths than the more silica-rich volcanic rocks (alkali basalts and tholeiites) and that all melts were produced from ocean island basalt (OIB)-type sources, containing garnet pyroxenite or eclogite. The Sr–Nd–Pb isotope data indicate that the silica-poor rocks were derived from high time-integrated U/Pb (HIMU)-type sources and the silica-rich rocks from more enriched mantle (EM)-type sources, reflecting greater interaction with lithosphere modified by subduction beneath Gondwana. The first-order cause of melting is inferred to be decompression melting in the garnet stability field of upwelling asthenosphere, triggered by removal (detachment) of different parts of the subcontinental lithospheric keel throughout the Cenozoic. In some cases, large thicknesses of keel were removed and magmatism extended over many millions of years. Decompression melting beneath a thick craton generates melts that are likely to be similar to those from the base of the mid-ocean-ridge melting column. At mid-ocean ridges, however, these melts never reach the surface in their pure form due to the ... Article in Journal/Newspaper Antipodes Islands Ocean Island OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) New Zealand Earth and Planetary Science Letters 248 1-2 350 367 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Diffuse intraplate volcanism spanning the Cenozoic on the North, South, Chatham, Auckland, Campbell and Antipodes Islands of New Zealand has produced quartz tholeiitic to basanitic/nephelinitic (including their differentiates) monogenetic volcanic fields and large shield volcanoes. New 40Ar/39Ar ages, combined with published age data, show no correlations among age, location or composition of the volcanoes. Continuous volcanism in restricted areas over long time periods, and a lack of volcanic age progressions in the direction and at the rate of plate motion, are inconsistent with a plume origin for the intraplate volcanism. Although localized extension took place during some episodes of volcanic activity, the degree of extension does not correlate with erupted volumes or compositions. Major and trace element data suggest that the silica-poor volcanic rocks (primarily basanites) were derived through low degrees of partial melting at deeper depths than the more silica-rich volcanic rocks (alkali basalts and tholeiites) and that all melts were produced from ocean island basalt (OIB)-type sources, containing garnet pyroxenite or eclogite. The Sr–Nd–Pb isotope data indicate that the silica-poor rocks were derived from high time-integrated U/Pb (HIMU)-type sources and the silica-rich rocks from more enriched mantle (EM)-type sources, reflecting greater interaction with lithosphere modified by subduction beneath Gondwana. The first-order cause of melting is inferred to be decompression melting in the garnet stability field of upwelling asthenosphere, triggered by removal (detachment) of different parts of the subcontinental lithospheric keel throughout the Cenozoic. In some cases, large thicknesses of keel were removed and magmatism extended over many millions of years. Decompression melting beneath a thick craton generates melts that are likely to be similar to those from the base of the mid-ocean-ridge melting column. At mid-ocean ridges, however, these melts never reach the surface in their pure form due to the ... |
format |
Article in Journal/Newspaper |
author |
Hoernle, Kaj White, J. D. L. van den Bogaard, Paul Hauff, Folkmar Coombs, D. S. Werner, Reinhard Timm, Christian Garbe-Schönberg, C.-Dieter Reay, A. Cooper, A. F. |
spellingShingle |
Hoernle, Kaj White, J. D. L. van den Bogaard, Paul Hauff, Folkmar Coombs, D. S. Werner, Reinhard Timm, Christian Garbe-Schönberg, C.-Dieter Reay, A. Cooper, A. F. Cenozoic intraplate volcanism on New Zealand: Upwelling induced by lithospheric removal |
author_facet |
Hoernle, Kaj White, J. D. L. van den Bogaard, Paul Hauff, Folkmar Coombs, D. S. Werner, Reinhard Timm, Christian Garbe-Schönberg, C.-Dieter Reay, A. Cooper, A. F. |
author_sort |
Hoernle, Kaj |
title |
Cenozoic intraplate volcanism on New Zealand: Upwelling induced by lithospheric removal |
title_short |
Cenozoic intraplate volcanism on New Zealand: Upwelling induced by lithospheric removal |
title_full |
Cenozoic intraplate volcanism on New Zealand: Upwelling induced by lithospheric removal |
title_fullStr |
Cenozoic intraplate volcanism on New Zealand: Upwelling induced by lithospheric removal |
title_full_unstemmed |
Cenozoic intraplate volcanism on New Zealand: Upwelling induced by lithospheric removal |
title_sort |
cenozoic intraplate volcanism on new zealand: upwelling induced by lithospheric removal |
publisher |
Elsevier |
publishDate |
2006 |
url |
https://oceanrep.geomar.de/id/eprint/683/ https://oceanrep.geomar.de/id/eprint/683/1/1-s2.0-S0012821X06004146-main.pdf https://doi.org/10.1016/j.epsl.2006.06.001 |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
Antipodes Islands Ocean Island |
genre_facet |
Antipodes Islands Ocean Island |
op_relation |
https://oceanrep.geomar.de/id/eprint/683/1/1-s2.0-S0012821X06004146-main.pdf Hoernle, K. , White, J. D. L., van den Bogaard, P., Hauff, F. , Coombs, D. S., Werner, R., Timm, C. , Garbe-Schönberg, C. D., Reay, A. and Cooper, A. F. (2006) Cenozoic intraplate volcanism on New Zealand: Upwelling induced by lithospheric removal. Earth and Planetary Science Letters, 248 (1-2). pp. 350-367. DOI 10.1016/j.epsl.2006.06.001 <https://doi.org/10.1016/j.epsl.2006.06.001>. doi:10.1016/j.epsl.2006.06.001 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2006.06.001 |
container_title |
Earth and Planetary Science Letters |
container_volume |
248 |
container_issue |
1-2 |
container_start_page |
350 |
op_container_end_page |
367 |
_version_ |
1811633471772164096 |