Skip to main content
Log in

Thermochemical Mantle Convection with Drifting Deformable Continents: Main Features of Supercontinent Cycle

  • Published:
Pure and Applied Geophysics Aims and scope Submit manuscript

Abstract

We employ 2D Cartesian geometry model of thermochemical convection with non-Newtonian rheology and phase transitions, in the presence of floating deformable continents. Using a mantle model with continental crust, lithosphere and the material of the oceanic crust that can be subjected to eclogitization we study the stages of supercontinent cycle: assembly, evolution of supercontinent, its breakup and divergence of continents. Our results show that cold downgoing flows aggregate continents into a supercontinent. After its formation, the convection pattern changes: the subduction zones at the edges of the supercontinent and typical relatively narrow mantle plumes in the subcontinental mantle arise. The lifetime of the supercontinent is about 550 Ma. Typical velocities for continents before collision are 3–10 cm/year, for supercontinent 0.5–1.5 cm/year and after the breakup 4–8 cm/year. Despite the small mobility of the supercontinent, there is no significant warming up of the subcontinental mantle. The temperature anomaly under supercontinent is less than + 50 K and the superplume does not arise. We obtain that the phase transitions at 410 km and 660 km and the eclogitization of the subducted oceanic crust affects the supercontinent cycle significantly. Our results demonstrate certain irregularity of supercontinent cycle. The typical shear stresses in the mantle are less than 30 MPa; in the subduction zones and on the continent borders they are 100–250 MPa. Before the breakup maximum shear stress generated in the supercontinent can reach 200 MPa.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12

Similar content being viewed by others

References

Download references

Acknowledgements

The work is carried out within the framework of the state assignment of the IPE RAS and is supported by the Russian Foundation for Basic Research (project 16-55-12033). The authors would like to thank the two anonymous reviewers, whose thorough reviews helped to improve the manuscript significantly. We are grateful to Louis Moresi, Shijie Zhong, Michael Gurnis, and other authors of the 2D CITCOM code for providing the possibility of using this software.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to A. A. Baranov.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Bobrov, A.M., Baranov, A.A. Thermochemical Mantle Convection with Drifting Deformable Continents: Main Features of Supercontinent Cycle. Pure Appl. Geophys. 176, 3545–3565 (2019). https://doi.org/10.1007/s00024-019-02164-w

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00024-019-02164-w

Navigation