scholarly journals The mechanisms underpinning Cenozoic intraplate volcanism in eastern Australia: Insights from seismic tomography and geodynamic modeling

2017 ◽  
Vol 44 (19) ◽  
pp. 9681-9690 ◽  
Author(s):  
N. Rawlinson ◽  
D. R. Davies ◽  
S. Pilia
Keyword(s):  
Seismic Tomography ◽  
Intraplate Volcanism ◽  
Eastern Australia

scholarly journals Intraplate volcanism triggered by bursts in slab flux

2020 ◽  
Vol 6 (51) ◽  
pp. eabd0953
Author(s):  
Ben R. Mather ◽  
R. Dietmar Müller ◽  
Maria Seton ◽  
Saskia Ruttor ◽  
Oliver Nebel ◽  
...  
Keyword(s):  
Transition Zone ◽  
Plate Tectonics ◽  
Isotope Geochemistry ◽  
Plate Boundary ◽  
Oceanic Lithosphere ◽  
Mantle Transition Zone ◽  
Age Progression ◽  
Intraplate Volcanism ◽  
Enriched Mantle ◽  
Eastern Australia

Long-lived, widespread intraplate volcanism without age progression is one of the most controversial features of plate tectonics. Previously proposed edge-driven convection, asthenospheric shear, and lithospheric detachment fail to explain the ~5000-km-wide intraplate volcanic province from eastern Australia to Zealandia. We model the subducted slab volume over 100 million years and find that slab flux drives volcanic eruption frequency, indicating stimulation of an enriched mantle transition zone reservoir. Volcanic isotope geochemistry allows us to distinguish a high-μ (HIMU) reservoir [>1 billion years (Ga) old] in the slab-poor south, from a northern EM1/EM2 reservoir, reflecting a more recent voluminous influx of oceanic lithosphere into the mantle transition zone. We provide a unified theory linking plate boundary and slab volume reconstructions to upper mantle reservoirs and intraplate volcano geochemistry.

Intraplate volcanism in Eastern Australia and New Zealand

1991 ◽  
Vol 46 (3-4) ◽  
pp. 331-332
Author(s):  
J.W. Cole
Keyword(s):  
New Zealand ◽  
Intraplate Volcanism ◽  
Eastern Australia

scholarly journals Intraplate volcanism triggered by bursts in slab flux

2021 ◽  
Author(s):  
Ben Mather ◽  
Dietmar Muller ◽  
Maria Seton ◽  
Saskia Ruttor ◽  
Oliver Nebel ◽  
...  
Keyword(s):  
Transition Zone ◽  
Plate Tectonics ◽  
Isotope Geochemistry ◽  
Plate Boundary ◽  
Oceanic Lithosphere ◽  
Mantle Transition Zone ◽  
Age Progression ◽  
Intraplate Volcanism ◽  
Eastern Australia ◽  
Mafic Volcanism

<p><span><span>Long-lived, widespread intraplate volcanism without age progression is one of the most controversial features of plate tectonics. The eastern margin of Australia and Zealandia has experienced extensive mafic volcanism </span><span>over the last 100 million years</span><span>. A plume origin has been proposed for </span><span>three distinct chains of volcanoes,</span> <span>however</span><span>, the majority of eruptions exhibit no clear age progression. Previously proposed edge-driven convection, asthenospheric shear, and lithospheric detachment fail to explain the non age-progressive eruptions </span><span>across the </span><span>~5000 km wide intraplate volcanic province from Eastern Australia to Zealandia. We model the subducted slab volume over 100 million years and find that slab flux drives volcanic eruption frequency, indicating stimulation of an enriched mantle transition zone reservoir. Volcanic isotope geochemistry allows us to distinguish a HIMU reservoir (>1 Ga old) in the slab-poor south, from a northern EM1/EM2 reservoir, reflecting a more recent voluminous influx of oceanic lithosphere into the mantle transition zone. We provide a unified theory linking plate boundary and slab volume reconstructions to upper mantle reservoirs and intraplate volcano geochemistry.</span></span></p>

scholarly journals Supplemental Material: Quaternary sodic and potassic intraplate volcanism in northeast China controlled by the underlying heterogeneous lithospheric structures

2021 ◽  
Author(s):  
Xingli Fan ◽  
Qi-fu Chen ◽  
et al.
Keyword(s):  
Seismic Tomography ◽  
Northeast China ◽  
Intraplate Volcanism ◽  
Data Source

Details on the data source, seismic tomography methods, and synthetic tests, including Figures S1–S12 and Table S1.<br>

Intraplate volcanism in Eastern Australia and New Zealand

1992 ◽  
Vol 14 (3) ◽  
pp. 379-380
Author(s):  
W.J. Wadsworth
Keyword(s):  
New Zealand ◽  
Intraplate Volcanism ◽  
Eastern Australia

scholarly journals Crustal structure of southeast Australia from teleseismic receiver functions

Solid Earth ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 463-481
Author(s):  
Mohammed Bello ◽  
David G. Cornwell ◽  
Nicholas Rawlinson ◽  
Anya M. Reading ◽  
Othaniel K. Likkason
Keyword(s):  
Crustal Structure ◽  
Seismic Velocity ◽  
Receiver Function ◽  
Crustal Thickness ◽  
Receiver Functions ◽  
Teleseismic Tomography ◽  
Intraplate Volcanism ◽  
Southeast Australia ◽  
Eastern Australia ◽  
Moho Depths

Abstract. In an effort to improve our understanding of the seismic character of the crust beneath southeast Australia and how it relates to the tectonic evolution of the region, we analyse teleseismic earthquakes recorded by 24 temporary and 8 permanent broadband stations using the receiver function method. Due to the proximity of the temporary stations to Bass Strait, only 13 of these stations yielded usable receiver functions, whereas seven permanent stations produced receiver functions for subsequent analysis. Crustal thickness, bulk seismic velocity properties, and internal crustal structure of the southern Tasmanides – an assemblage of Palaeozoic accretionary orogens that occupy eastern Australia – are constrained by H–κ stacking and receiver function inversion, which point to the following: a ∼ 39.0 km thick crust; an intermediate–high Vp/Vs ratio (∼ 1.70–1.76), relative to ak135; and a broad (> 10 km) crust–mantle transition beneath the Lachlan Fold Belt. These results are interpreted to represent magmatic underplating of mafic materials at the base of the crust. a complex crustal structure beneath VanDieland, a putative Precambrian continental fragment embedded in the southernmost Tasmanides, that features strong variability in the crustal thickness (23–37 km) and Vp/Vs ratio (1.65–193), the latter of which likely represents compositional variability and the presence of melt. The complex origins of VanDieland, which comprises multiple continental ribbons, coupled with recent failed rifting and intraplate volcanism, likely contributes to these observations. stations located in the East Tasmania Terrane and eastern Bass Strait (ETT + EB) collectively indicate a crust of uniform thickness (31–32 km), which clearly distinguishes it from VanDieland to the west. Moho depths are also compared with the continent-wide AusMoho model in southeast Australia and are shown to be largely consistent, except in regions where AusMoho has few constraints (e.g. Flinders Island). A joint interpretation of the new results with ambient noise, teleseismic tomography, and teleseismic shear wave splitting anisotropy helps provide new insight into the way that the crust has been shaped by recent events, including failed rifting during the break-up of Australia and Antarctica and recent intraplate volcanism.

scholarly journals Intraplate Volcanism in Eastern Australia and New Zealand

1991 ◽  
Vol 105 (3) ◽  
pp. 805-805
Author(s):  
GODFREY FITTON
Keyword(s):  
New Zealand ◽  
Intraplate Volcanism ◽  
Eastern Australia

Intraplate volcanism in eastern Australia and New Zealand

1997 ◽  
Vol 61 (10) ◽  
pp. 2147-2148
Author(s):  
William P. Leeman
Keyword(s):  
New Zealand ◽  
Intraplate Volcanism ◽  
Eastern Australia

scholarly journals Supplemental Material: Quaternary sodic and potassic intraplate volcanism in northeast China controlled by the underlying heterogeneous lithospheric structures

2021 ◽  
Author(s):  
Xingli Fan ◽  
Qi-fu Chen ◽  
et al.
Keyword(s):  
Seismic Tomography ◽  
Northeast China ◽  
Intraplate Volcanism ◽  
Data Source

Details on the data source, seismic tomography methods, and synthetic tests, including Figures S1–S12 and Table S1.<br>

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