Passive-margin prolonged volcanism, East Australian Plate: Outbursts, progressions, plate controls and suggested causes
Prolonged intraplate volcanism along the 4000 km-long East Australian margin for ca 100 Ma raises many genetic questions. Studies of the age-progressive pulses embedded in general basaltic activity have spawned a host of models. Zircon U-Pb dating of inland Queensland central volcanoes gives a stron...
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Online Access: | https://doi.org/10.1080/08120099.2012.688293 http://ecite.utas.edu.au/81409 |
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ftunivtasecite:oai:ecite.utas.edu.au:81409 2023-05-15T14:02:30+02:00 Passive-margin prolonged volcanism, East Australian Plate: Outbursts, progressions, plate controls and suggested causes Sutherland, FL Graham, IT Meffre, S Zwingmann, H Pogson, RE 2012 https://doi.org/10.1080/08120099.2012.688293 http://ecite.utas.edu.au/81409 en eng Taylor & Francis Ltd. http://dx.doi.org/10.1080/08120099.2012.688293 http://purl.org/au-research/grants/arc/CE0561595 Sutherland, FL and Graham, IT and Meffre, S and Zwingmann, H and Pogson, RE, Passive-margin prolonged volcanism, East Australian Plate: Outbursts, progressions, plate controls and suggested causes, Australian Journal of Earth Sciences, 59, (7) pp. 983-1005. ISSN 0812-0099 (2012) [Refereed Article] http://ecite.utas.edu.au/81409 Earth Sciences Geology Igneous and Metamorphic Petrology Refereed Article PeerReviewed 2012 ftunivtasecite https://doi.org/10.1080/08120099.2012.688293 2019-12-13T21:46:31Z Prolonged intraplate volcanism along the 4000 km-long East Australian margin for ca 100 Ma raises many genetic questions. Studies of the age-progressive pulses embedded in general basaltic activity have spawned a host of models. Zircon U-Pb dating of inland Queensland central volcanoes gives a stronger database to consider the structure and origin of Australian age-progressive volcanic chains. This assists appraisal of this volcanism in relation to plate motion and plate margin tectonic models. Inland Queensland central volcanoes progressed south-southeast from 34 to 31 Ma (~5.4 cm/yr) until a surge in activity led to irregular southerly progression 31 to 28 Ma. A new inland southeastern Queensland central volcano line (25 to 22 Ma), from Bunya Mountains to North Main Range, followed 3 Ma behind the adjacent coastal progression. The Australian and Tasman Sea age-progressive chains are compared against recent plate motion modelling (Indian Ocean hotspots). The chain lines differ from general vector traces owing to west-facing swells and cessations in activity. Tectonic processes on the eastern plate margin may regulate these irregularities. These include subduction, rapid roll-back and progressive detachment of the Loyalty slab (43 to 15 Ma). West-flowing Pacific-type asthenosphere, related to perturbed mantle convection, may explain the west-facing volcanic surges. Such westward Pacific flow for over 28 Ma is known at the Australian-Antarctic Discordance, southeast of the present Australian plume sites under Bass Strait-West Tasman Sea. Most basaltic activity along eastern Australia marks asthenospheric melt injections into Tasman rift zone mantle and not lithospheric plate speed. The young (post-10 Ma) fields (Queensland, Victoria-South Australia) reflect new plate couplings, which altered mantle convection and stress regimes. These areas receive asthenospheric inputs from deep thermal zones off northeast Queensland and under Bass Strait. 2012 Copyright Taylor and Francis Group, LLC. Article in Journal/Newspaper Antarc* Antarctic eCite UTAS (University of Tasmania) Antarctic Pacific Indian Queensland Australian-Antarctic Discordance ENVELOPE(124.000,124.000,-49.000,-49.000) Australian Journal of Earth Sciences 59 7 983 1005 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geology Igneous and Metamorphic Petrology |
spellingShingle |
Earth Sciences Geology Igneous and Metamorphic Petrology Sutherland, FL Graham, IT Meffre, S Zwingmann, H Pogson, RE Passive-margin prolonged volcanism, East Australian Plate: Outbursts, progressions, plate controls and suggested causes |
topic_facet |
Earth Sciences Geology Igneous and Metamorphic Petrology |
description |
Prolonged intraplate volcanism along the 4000 km-long East Australian margin for ca 100 Ma raises many genetic questions. Studies of the age-progressive pulses embedded in general basaltic activity have spawned a host of models. Zircon U-Pb dating of inland Queensland central volcanoes gives a stronger database to consider the structure and origin of Australian age-progressive volcanic chains. This assists appraisal of this volcanism in relation to plate motion and plate margin tectonic models. Inland Queensland central volcanoes progressed south-southeast from 34 to 31 Ma (~5.4 cm/yr) until a surge in activity led to irregular southerly progression 31 to 28 Ma. A new inland southeastern Queensland central volcano line (25 to 22 Ma), from Bunya Mountains to North Main Range, followed 3 Ma behind the adjacent coastal progression. The Australian and Tasman Sea age-progressive chains are compared against recent plate motion modelling (Indian Ocean hotspots). The chain lines differ from general vector traces owing to west-facing swells and cessations in activity. Tectonic processes on the eastern plate margin may regulate these irregularities. These include subduction, rapid roll-back and progressive detachment of the Loyalty slab (43 to 15 Ma). West-flowing Pacific-type asthenosphere, related to perturbed mantle convection, may explain the west-facing volcanic surges. Such westward Pacific flow for over 28 Ma is known at the Australian-Antarctic Discordance, southeast of the present Australian plume sites under Bass Strait-West Tasman Sea. Most basaltic activity along eastern Australia marks asthenospheric melt injections into Tasman rift zone mantle and not lithospheric plate speed. The young (post-10 Ma) fields (Queensland, Victoria-South Australia) reflect new plate couplings, which altered mantle convection and stress regimes. These areas receive asthenospheric inputs from deep thermal zones off northeast Queensland and under Bass Strait. 2012 Copyright Taylor and Francis Group, LLC. |
format |
Article in Journal/Newspaper |
author |
Sutherland, FL Graham, IT Meffre, S Zwingmann, H Pogson, RE |
author_facet |
Sutherland, FL Graham, IT Meffre, S Zwingmann, H Pogson, RE |
author_sort |
Sutherland, FL |
title |
Passive-margin prolonged volcanism, East Australian Plate: Outbursts, progressions, plate controls and suggested causes |
title_short |
Passive-margin prolonged volcanism, East Australian Plate: Outbursts, progressions, plate controls and suggested causes |
title_full |
Passive-margin prolonged volcanism, East Australian Plate: Outbursts, progressions, plate controls and suggested causes |
title_fullStr |
Passive-margin prolonged volcanism, East Australian Plate: Outbursts, progressions, plate controls and suggested causes |
title_full_unstemmed |
Passive-margin prolonged volcanism, East Australian Plate: Outbursts, progressions, plate controls and suggested causes |
title_sort |
passive-margin prolonged volcanism, east australian plate: outbursts, progressions, plate controls and suggested causes |
publisher |
Taylor & Francis Ltd. |
publishDate |
2012 |
url |
https://doi.org/10.1080/08120099.2012.688293 http://ecite.utas.edu.au/81409 |
long_lat |
ENVELOPE(124.000,124.000,-49.000,-49.000) |
geographic |
Antarctic Pacific Indian Queensland Australian-Antarctic Discordance |
geographic_facet |
Antarctic Pacific Indian Queensland Australian-Antarctic Discordance |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://dx.doi.org/10.1080/08120099.2012.688293 http://purl.org/au-research/grants/arc/CE0561595 Sutherland, FL and Graham, IT and Meffre, S and Zwingmann, H and Pogson, RE, Passive-margin prolonged volcanism, East Australian Plate: Outbursts, progressions, plate controls and suggested causes, Australian Journal of Earth Sciences, 59, (7) pp. 983-1005. ISSN 0812-0099 (2012) [Refereed Article] http://ecite.utas.edu.au/81409 |
op_doi |
https://doi.org/10.1080/08120099.2012.688293 |
container_title |
Australian Journal of Earth Sciences |
container_volume |
59 |
container_issue |
7 |
container_start_page |
983 |
op_container_end_page |
1005 |
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1766272812764364800 |