[Rockhounds] Did moon-forming giant impact start the first subduction on Earth?

[Paul]

Computer models suggest modern plate tectonics are due to
blobs left behind by cosmic collision, PhysOrg, May 2024
https://phys.org/news/2024-05-modern-plate-tectonics-due-blobs.html

The open access paper is:

Yuan, Q., Gurnis, M., Asimow, P.D. and Li, Y., 2024. A giant
impact origin for the first subduction on Earth. Geophysical
Research Letters, 51(9), p.e2023GL106723.
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GL106723

Related publications are:

Yuan, Q., Gurnis, M. and Asimow, P.D., 2023. A Giant Impact
Origin for the First Subduction on Earth. LPI Contributions,
2806, no. 2723. https://www.hou.usra.edu/meetings/lpsc2023/pdf/2723.pdf

Yuan, Q., Li, M., Desch, S.J., Ko, B., Deng, H., Garnero, E.J.,
Gabriel, T.S., Kegerreis, J.A., Miyazaki, Y., Eke, V. and Asimow,
P.D., 2023. Moon-forming impactor as a source of Earth’s basal
mantle anomalies. Nature, 623(7985), pp.95-99.
https://www.gonzmosis.com/uploads/7/4/8/4/7484591/s41586-023-06589-1.pdf

Finally, the Virtual Seminars in Precambrian Geology videos
( https://www.youtube.com/channel/UC-mxePnmA2Lchjn_gm7O06g )
on Youtube present a number of talks on the various ideas
about when modern plate tectonics started.

They include:

Geodynamic models of early Earth crust formation:
Stagnant-lid, plate tectonics... - Bradford Foley
https://www.youtube.com/watch?v=OPPpGc6EyQ4

Segmentation of subducting slabs and its implication
for the onset of modern plate tectonics - Taras Gerya
https://www.youtube.com/watch?v=cqlrNlXfsRw

Plate-tectonic processes at ca. 2.0 Ga: Evidence from
more than 600 km of plate convergence in the
Limpopo orogenic belt in southern Africa. - An Yi
https://www.youtube.com/watch?v=P9Z2qzIR_Cw

As can be seen in these talks, there is not any
consensus on when modern plate tectonics started.

Yours,

Paul H.