Computer models suggest modern plate tectonics are due to
blobs left behind by cosmic collision, PhysOrg, May 2024
[phys.org]

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.
[agupubs.onlinelibrary.wiley.com]

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. [www.hou.usra.edu]

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.
[www.gonzmosis.com]

Finally, the Virtual Seminars in Precambrian Geology videos
( [www.youtube.com] ) 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
[www.youtube.com]

Segmentation of subducting slabs and its implication
for the onset of modern plate tectonics - Taras Gerya
[www.youtube.com]

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
[www.youtube.com]

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

Yours,

Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)



Edited 9 time(s). Last edit at 05/19/2024 01:23PM by Paul H..