Evaluating tomotectonic plate reconstructions using geodynamic models with data assimilation, the case for North America

Li, Yanchong; Liu, Lijun; Peng, Dingkun; Huang, Dong; Li, Sanzhong

doi:10.1016/j.earscirev.2023.104518

Cited by 5 publications

(3 citation statements)

References 82 publications

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“…The continental mantle lithosphere consists of a buoyant upper layer, a neutrally buoyant middle layer, and a dense lower layer relative to the ambient mantle that follows recent inferences [53][54][55] . More model information is available in recent studies using similar methods [24][25][26][27] .…”

Section: Governing Equations and Data Assimilationmentioning

confidence: 99%

“…S1) including slabs and large-low-shear-velocity provinces (LLSVPs) that match present-day tomographic structures both regionally (Fig. 3a) and globally [24][25][26][27] . Its temporally evolving continental lithospheric thickness in response to mantle dynamics also allows quantifying the lithosphere-asthenosphere interaction due to the variable LAB (lithosphere-asthenosphere boundary) depth (Fig.…”

Section: Cenozoic Slab Evolution and Mantle Owmentioning

confidence: 99%

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Cenozoic India-Asia collision driven by mantle dragging the cratonic root

Li,

Liu,

Peng

et al. 2023

Preprint

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The driving force behind the Cenozoic Indian-Asia collision remains elusive. Using global-scale geodynamic modeling, we find that the continuous motion of the Indian plate is driven by a prominent upper-mantle flow pushing the thick Indian lithospheric root, originated from the northward rollover of the detached Neo-Tethyan slab and sinking slabs below East Asia. The maximum mantle drag occurs within the strong Indian lithosphere and is comparable in magnitude to that of slab pull (1013 N/m). The thick cratonic root enhances both lithosphere-asthenosphere coupling and upper-plate compressional stress, thereby sustaining the topography of Tibetan Plateau. We show that the calculated resistant force from the India-Asia plate boundary is also close to that due to the gravitational potential energy of Tibetan Plateau. Our findings suggest that this mantle flow is key for the formation of the Tibetan Plateau and represents part of a hemispheric convergent flow pattern centered on central Asia.

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Section: Governing Equations and Data Assimilationmentioning

confidence: 99%

Section: Cenozoic Slab Evolution and Mantle Owmentioning

confidence: 99%

Cenozoic India-Asia collision driven by mantle dragging the cratonic root

Li,

Liu,

Peng

et al. 2023

Preprint

Self Cite

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show abstract

“…kinematically constrained by reconstructed plate motions and aiming to resemble Earth-like features (e.g., Bull et al, 2014;Coltice & Shephard, 2018;Faccenna et al, 2013;Flament et al, 2022;Li et al, 2023;Lin et al, 2022) configurational entropy may serve as a means to quantify and map the degree of mixing, and hence to determine average cell composition, on a local, regional or a global scale.…”

Section: Outlook and Conclusionmentioning

confidence: 99%

Quantifying mantle mixing through configurational Entropy

van der Wiel,

Thieulot,

van Hinsbergen

2023

Preprint

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Geodynamic models of mantle convection provide a powerful tool to obtain insights into the structure and composition of the Earth’s mantle that resulted from a long history of differentiating and mixing. Comparing such models with geophysical and geochemical observations is challenging as these datasets often sample entirely different temporal and spatial scales. Here, we explore the use of configurational entropy, based on tracer and compositional distribution on a global and local scale. We show means to calculate configurational entropy in a 2D annulus and find that these calculations may be used to quantitatively compare long-term geodynamic models with each other. The entropy may be used to analyze, with a single measure, the mixed state of the mantle as a whole and may also be useful to validate numerical models against local anomalies in the mantle that may be inferred from seismological or geochemical observations.

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Cenozoic India-Asia collision driven by mantle dragging the cratonic root

Li,

Liu,

et al. 2024

Nat Commun

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The driving force behind the Cenozoic India-Asia collision remains elusive. Using global-scale geodynamic modeling, we find that the continuous motion of the Indian plate is driven by a prominent upper-mantle flow pushing the thick Indian lithospheric root, originated from the northward rollover of the detached Neo-Tethyan slab and sinking slabs below East Asia. The maximum mantle drag occurs within the strong Indian lithosphere and is comparable in magnitude to that of slab pull (10 13 N m −1 ). The thick cratonic root enhances both lithosphere-asthenosphere coupling and upper-plate compressional stress, thereby sustaining the topography of Tibetan Plateau. We show that the calculated resistant force from the India-Asia plate boundary is also close to that due to the gravitational potential energy of Tibetan Plateau. Here, we demonstrate that this mantle flow is key for the formation of the Tibetan Plateau and represents part of a hemispheric convergent flow pattern centered on central Asia.

show abstract

Evaluating tomotectonic plate reconstructions using geodynamic models with data assimilation, the case for North America

Cited by 5 publications

References 82 publications

Cenozoic India-Asia collision driven by mantle dragging the cratonic root

Cenozoic India-Asia collision driven by mantle dragging the cratonic root

Quantifying mantle mixing through configurational Entropy

Cenozoic India-Asia collision driven by mantle dragging the cratonic root

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