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The Dunedin Volcanic Group and a Revised Model for Zealandia's Alkaline Intraplate Volcanism
New Zealand Journal of Geology, and Geophysics, 2020ABSTRACT The intraplate rocks of the Dunedin Volcanic Group (DVG) in New Zealand's South Island erupted in two discrete areas between 25 and 21 Ma before becoming distributed over > 7,800 km 2 until ∼9 Ma.
James Scott +2 more
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Temporal and Geochemical Evolution of the Cenozoic Intraplate Volcanism of Zealandia [PDF]
Earth-Science Reviews, 2010 In order to constrain better the distribution, age, geochemistry and origin of widespread Cenozoic intraplate volcanism on Zealandia, the New Zealand micro-continent, we report new 40Ar/39Ar and geochemical (major and trace element and Sr–Nd–Hf–Pb ...
Dieter Garbe-Schönberg +2 more
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B″ not D″ as the source of intraplate volcanism
2022ABSTRACT Under fast-moving oceanic plates, the asthenosphere seismic B″ region becomes isolated from the convecting mantle by plate drag and acts as an advecting layer, which can serve as a long-lived source for intraplate volcanism.
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Journal of the Geological Society, 2014
Late Cenozoic intraplate volcanism in the Changbai volcanic field straddles the border between China and North Korea, forming basic (alkali basalts and tholeiites) and intermediate–acidic (trachytes and peralkaline rhyolites) volcanic rocks with ages ranging from 19.9 Ma to the present.
Maoliang Zhang +4 more
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Late Cenozoic intraplate volcanism in the Changbai volcanic field straddles the border between China and North Korea, forming basic (alkali basalts and tholeiites) and intermediate–acidic (trachytes and peralkaline rhyolites) volcanic rocks with ages ranging from 19.9 Ma to the present.
Maoliang Zhang +4 more
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Numerical modeling of the formation of extensive intraplate volcanism
2023The occurrence of mantle melting is generally attributed to high temperature, decreased pressure, and/or the presence of volatiles such as water. Volcanism away from plate boundaries is ascribed to intraplate or anorogenic volcanism, which may reveal important dynamics of the deep mantle.
Jianfeng Yang +2 more
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Recycling of Oceanic Crust and the Origin of Intraplate Volcanism
Australian Journal of Earth Sciences, 2013Source models for intraplate volcanism (IPV) include vertical introduction of material from deep in the mantle (plume model), contamination of the shallow mantle (perisphere and continental mantle delamination models) and derivation by selective partial melting of oceanic crust recycled into the depleted mantle (SUMA/streaky mantle models).
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Basic volcanism associated with intraplate linear features
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1986Abstract Intraplate volcanic lineaments include ocean island chains and continental rift systems. Basic lavas erupted in such lineaments form a continuum from tholeiitic basalt in the basements of ocean islands to nephelinites and melilitites in continental rifts and as a capping on ocean islands. All these magma types are enriched in
J. G. Fitton, D. James
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Patterns of intraplate volcanism controlled by asthenospheric shear
Nature Geoscience, 2011Volcanism observed far from plate boundaries, in the interior of oceanic and continental plates, may result from flow in the underlying mantle. Comparison between a numerical model of mantle flow and the spatial distribution of intraplate volcanism indicates that rapid shear motion in the mantle may drive melting that causes intraplate eruptions.
Clinton P. Conrad +3 more
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Buoyant Decompression Melting: A Possible Mechanism for Intraplate Volcanism [PDF]
Journal of Geophysical Research: Solid Earth, 2002 Volcanic activity away from plate boundaries occurs in a variety of settings. Linear, age‐progressive volcanic chains have been explained as the manifestation of fixed hot spots, possibly generated by plumes originating deep in the mantle. However, important examples of oceanic intraplate volcanism cannot be explained in this way, including short‐lived
E M Prmentier, Daniel S Scheirer
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Magma ascent in Australian intraplate basaltic volcanic provinces
2023<p>Australia hosts at least two active continental basaltic volcanic fields with Holocene eruption ages yet little is understood about magma ascent and mantle to surface ascent pathways and timescales in these regions. In this study we use textural and chemical information stored within minerals from two of the youngest volcanic eruptions
Heather Handley +3 more
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