scholarly journals Intraplate volcanism due to convective instability of stagnant slabs in the mantle transition zone

2015 ◽  
Vol 16 (2) ◽  
pp. 538-551 ◽  
Author(s):  
Matthew H. Motoki ◽  
Maxim D. Ballmer
Keyword(s):  
Transition Zone ◽  
Convective Instability ◽  
Mantle Transition Zone ◽  
Intraplate Volcanism

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.

scholarly journals Intraplate volcanism originating from upwelling hydrous mantle transition zone

Nature ◽  
2020 ◽  
Vol 579 (7797) ◽  
pp. 88-91 ◽  
Author(s):  
Jianfeng Yang ◽  
Manuele Faccenda
Keyword(s):  
Transition Zone ◽  
Mantle Transition Zone ◽  
Intraplate Volcanism

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>

Receiver function images of the mantle transition zone beneath NE China: New constraints on intraplate volcanism, deep subduction and their potential link

2015 ◽  
Vol 412 ◽  
pp. 101-111 ◽  
Author(s):  
Zheng Liu ◽  
Fenglin Niu ◽  
Yongshun John Chen ◽  
Steve Grand ◽  
Hitoshi Kawakatsu ◽  
...  
Keyword(s):  
Transition Zone ◽  
Receiver Function ◽  
Ne China ◽  
Mantle Transition Zone ◽  
Intraplate Volcanism ◽  
Potential Link

Mantle transition zone, stagnant slab and intraplate volcanism in Northeast Asia

2017 ◽  
pp. ggw491 ◽  
Author(s):  
Chuanxu Chen ◽  
Dapeng Zhao ◽  
You Tian ◽  
Shiguo Wu ◽  
Akira Hasegawa ◽  
...  
Keyword(s):  
Transition Zone ◽  
Northeast Asia ◽  
Mantle Transition Zone ◽  
Intraplate Volcanism ◽  
Stagnant Slab

Theoretical modeling of the regular olivine intergrowths in the mimetic paramorphosis after ringwoodite and wadsleyite

2018 ◽  
pp. 3-12
Author(s):  
B. B. Shkursky
Keyword(s):  
Transition Zone ◽  
Theoretical Modeling ◽  
Mantle Transition Zone ◽  
Misorientation Angles

Theoretical modeling of regular olivine grains misorientations in mimetic paramorphoses after ringwoodite and wadsleyite, the formation of which during the ascension of matter from the Mantle Transition Zone is expected, has been carried out. The coordinates of the misorientation axes and the misorientation angles, characterizing 10 operations of alignment in the pair intergrowths of olivine grains, eight of which are twins, are calculated. Possible conditions for the formation of mimetic paramorphoses predicted here, and the chances of their persistence are discussed. The calculated orientations are compared with the known twinning laws of olivine.

scholarly journals A thin mantle transition zone beneath the equatorial Mid-Atlantic Ridge

Nature ◽  
2021 ◽  
Vol 589 (7843) ◽  
pp. 562-566
Author(s):  
Matthew R. Agius ◽  
Catherine A. Rychert ◽  
Nicholas Harmon ◽  
Saikiran Tharimena ◽  
J.-Michael Kendall
Keyword(s):  
Transition Zone ◽  
Mantle Transition Zone ◽  
Mid Atlantic Ridge
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