ArticleProceedings of the National Academy of Sciences of the United States of America2024
Gondwanan flood basalts linked seismically to plume-induced lithosphere instability.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 10 citations in OpenAlex.
- Ancient plume-reinforced lithosphere modulates present-day crustal fluid migration and deformation.Nature communications · 2026Article
- Lens effect of remnant blocks on deep mantle upwelling causing anomalous subsidence.Nature communications · 2025Article
- Gondwanan flood basalts linked seismically to plume-induced lithosphere instability.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
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2 authors at 1 institution in 1 country.
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Abstract
Delamination of the continental lithospheric mantle is well recorded beneath several continents. However, the fate of the removed continental lithosphere has been rarely noted, unlike subducted slabs reasonably well imaged in the upper and mid mantle. Beneath former Gondwana, recent seismic tomographic models indicate the presence of at least 5 horizontal fast-wavespeed anomalies at ~600 km depths that do not appear to be related to slab subduction, including fast structures in locations consistent with delamination associated with the Paraná Flood Basalt event at ~134 Ma and the Deccan Traps event at ~66 Ma. These fast-wavespeed anomalies often lie above broad slow seismic wavespeed trunks at 500 to 700 km depths beneath former Gondwana, with slow wavespeed anomalies branching around them. Numerical experiments indicate that delaminated lithosphere tends to stagnate in the transition zone and mid-mantle above a mantle plume where it shapes subsequent plume upwelling. For hot plumes, the melt volume generated during plume-influenced delamination can easily reach ~2 to 4 × 10
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