Oceanic plateau of the Hawaiian mantle plume head subducted to the uppermost lower mantle

Wei, S. S.; Shearer, Peter M.; Lithgow‐Bertelloni, Carolina; Stixrude, Lars; Tian, Dongdong

doi:10.1126/science.abd0312

Cited by 25 publications

(7 citation statements)

References 59 publications

(106 reference statements)

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“…2 ). Nonetheless, a recent seismological study of a slab below Kamchatka was able to identify thick crust in the order of 20 km in a lower-mantle slab [ 98 ]. Once a slab can be firmly tied to lithosphere that subducted after initial collision, such as the overturned Himalayan slab that straddles the transition zone [ 11 , 38 ], such seismological analyses may provide novel constraints on their composition and crustal nature.…”

Section: Discussionmentioning

confidence: 99%

Indian plate paleogeography, subduction and horizontal underthrusting below Tibet: paradoxes, controversies and opportunities

Hinsbergen

2022

National Science Review

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The India-Asia collision zone is the archetype to calibrate geological responses of continent-continent collision, but hosts a paradox: there is no orogen-wide geological record of oceanic subduction after initial collision around 60-55 Ma, yet thousands of kilometers of post-collisional subduction occurred before arrival of unsubductable continental lithosphere that currently horizontally underlies Tibet. Kinematically restoring incipient horizontal underthrusting accurately predicts geologically estimated diachronous slab break-off, unlocking the Miocene of Himalaya-Tibet as natural laboratory for unsubductable lithosphere convergence. Additionally, three end-member paleogeographic scenarios exist with different predictions for the nature of post-collisional subducting lithosphere but each is defended and challenged based on similar data types. This paper attempts at breaking through this impasse by identifying how the three paleogeographic scenario each challenge paradigms in geodynamics, orogenesis, magmatism, or paleogeographic reconstruction and identify opportunities for methodological advances in paleomagnetism, sediment provenance analysis, and seismology to conclusively constrain Greater Indian paleogeography.

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Section: Discussionmentioning

confidence: 99%

Indian plate paleogeography, subduction and horizontal underthrusting below Tibet: paradoxes, controversies and opportunities

Hinsbergen

2022

National Science Review

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“…Some hotspot tracks end at subduction zones and it has been proposed that the respective LIP might have been accreted to the overriding plate, for example, for the Hawaii plume in Kamchatka and the Okhotsk Sea 175 . An alternative hypothesis is that the Hawaiian flood basalts might have been subducted into the upper mantle below Kamchatka 176 .…”

Section: Thermochemical Mantle Plumesmentioning

confidence: 99%

“…Over the last decade, studies on Shatsky Rise 307,308 have reinforced the idea that some LIPs might not be caused by plume head eruptions, raising the question whether Shatsky and other LIPs are the result of headless plumes interacting with overriding oceanic spreading centres. Similarly, it will be important to establish whether Cretaceous LIPs existed that could have formed from plume heads belonging to, for example, the Hawaii and Louisville mantle plumes, which, by now, could have been obducted onto land 110 or subducted into the upper mantle 176 .…”

Section: Volcanic Surface Expressionsmentioning

confidence: 99%

Mantle plumes and their role in Earth processes

Koppers

Becker

Jackson

et al. 2021

Nat Rev Earth Environ

117

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The existence of mantle plumes was first proposed in the 1970s to explain intra-plate, hotspot volcanism, yet owing to difficulties in resolving mantle upwellings with geophysical images and discrepancies in interpretations of geochemical and geochronological data, the origin, dynamics and composition of plumes and their links to plate tectonics are still contested. In this Review, we discuss progress in seismic imaging, mantle flow modelling, plate tectonic reconstructions and geochemical analyses that have led to a more detailed understanding of mantle plumes. Observations suggest plumes could be both thermal and chemical in nature, can attain complex and broad shapes, and that more than 18 plumes might be rooted in regions of the lowermost mantle. The case for a deep mantle origin is strengthened by the geochemistry of hotspot volcanoes that provide evidence for entrainment of deeply recycled subducted components, primordial m an tle domains and, potentially, materials from Earth's core. Deep mantle plumes often appear deflected by large-scale mantle flow, resulting in hotspot motions required to resolve past tectonic plate motions. Future research requires improvements in resolution of seismic tomography to better visualize deep mantle plume structures at smaller than 100-km scales. Concerted multi-proxy geochemical and dating efforts are also needed to better resolve spatiotemporal and chemical evolutions of long-lived mantle plumes.

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“…The Hawaiian mantle plume was thought to have had a large initial size (radius > 1500 km) about 100 million years ago before the formation of the earliest crater, the related large igneous province had either accreted to the Kamchatka-Okhotsk region 15 or subducted beneath it 16 (Fig. 1).…”

Section: Off-plume-axis Volcanic Craters Along Pre-existing Structuresmentioning

confidence: 99%

Head-to-tail plume shrinking contributes to the Hawaiian-Emperor Bend and plume zonation

Wang,

et al. 2023

Preprint

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The Hawaiian-Emperor Bend (HEB) is traditionally attributed to the motion of the Pacific plate over a fixed or drifting mantle plume. Yet, the role of the plume's evolving radius in this process remains unexplored. We incorporate a shrinking plume head into plate reconstructions to investigate the formation of the HEB. Initially, the plume transported magma near the Kula-Pacific plate boundary, ~1500 km away from the plume axis. During 80-47 Ma, the shrinking plume head compelled newly formed craters to move from the mid-ocean ridge toward the mantle plume axis, forming an age-progressive volcanic chain on the moving plate and with decreased asthenospheric material signatures. After 47 Ma, seamounts approached the plume axis, causing the later island chain to align more parallel to the plate motion and exhibit more distinct plume signatures. Our model thus provides a new mechanism that contributed to the migration and compositional change of the Hawaiian-Emperor seamounts during the plume-plate interaction.

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Oceanic plateau of the Hawaiian mantle plume head subducted to the uppermost lower mantle

Cited by 25 publications

References 59 publications

Indian plate paleogeography, subduction and horizontal underthrusting below Tibet: paradoxes, controversies and opportunities

Indian plate paleogeography, subduction and horizontal underthrusting below Tibet: paradoxes, controversies and opportunities

Mantle plumes and their role in Earth processes

Head-to-tail plume shrinking contributes to the Hawaiian-Emperor Bend and plume zonation

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