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Secular Craton Evolution Due to Cyclic Deformation of Underlying Dense Mantle Lithosphere by Yaoyi Wang; Zebin Cao; Lihang Peng; Lijun Liu; Ling Chen; Craig Lundstrom; Diandian Peng; Xiaotao Yang is a Earth and Planetary Sciences article available to read on EtoBox.

What is Secular Craton Evolution Due to Cyclic Deformation of Underlying Dense Mantle Lithosphere about?

The cratonic crust is the most long-lived tectonic unit on Earth. The longevity of Earth's cratonic crust has been attributed to neutrally buoyant and mechanically strong lithospheric keels. However, this is inconsistent with observed secular cratonic deformation and alteration. Here we analyse the density profile and dynamic evolution of the lithospheric mantle underlying cratons to show that cratonic lithosphere may have experienced continuous and cyclic deformation and evolution since the break-up of the Rodinia supercontinent ~800 million years ago. We find that the thickness of cratonic crust correlates linearly with that of the mantle lithosphere, suggesting coupled evolution. Seismic evidence for depth-dependent radial anisotropy implies that the dense lower cratonic lithosphere experienced pervasive vertical deformation consistent with delamination. Geologic data and azimuthal anisotropy further suggest repeated post-Rodinia thinning of cratonic lithosphere followed by gradual restabilization of the perturbed lower lithosphere. Geodynamic simulations support our interpretation that partial lithospheric delamination, potentially triggered by plume underplating, can generate

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Author

Yaoyi Wang; Zebin Cao; Lihang Peng; Lijun Liu; Ling Chen; Craig Lundstrom; Diandian Peng; Xiaotao Yang

Publisher

Springer Science and Business Media LLC

Published

2023

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)