HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Episodic growth of felsic continents in the past 3.7 Ga

Abstract : Continents form the most accessible parts of Earth, but their complex compositions make their origin difficult to investigate. A novel approach based on a comprehensive compilation of samarium-neodymium isotopic compositions of detrital sedimentary rocks is here used to unravel continental growth through time. This record reveals that continents were as felsic as today in the past 3.7 Ga (billion years) and that their growth was not continuous but episodic. Reworking of preexisting crust was a ubiquitous process during most of Earth history, but at least six periods of continental growth can be identified every 500 to 700 Ma (million years) in the past 3.7 Ga. This recurrence could be accounted for by changes in tectonic plate velocities favoring periods of rapid subduction and enhanced production of juvenile felsic crust.
Document type :
Journal articles
Complete list of metadata

https://hal.uca.fr/hal-03370482
Contributor : Sylvaine Jouhannel Connect in order to contact the contributor
Submitted on : Friday, October 8, 2021 - 9:08:33 AM
Last modification on : Wednesday, May 11, 2022 - 10:00:05 AM
Long-term archiving on: : Sunday, January 9, 2022 - 6:19:27 PM

File

Garcon_ScienceAdvances_2021.pd...
Files produced by the author(s)

Licence


Distributed under a Creative Commons Attribution - NonCommercial 4.0 International License

Identifiers

Collections

Citation

Marion Garçon. Episodic growth of felsic continents in the past 3.7 Ga. Science Advances , American Association for the Advancement of Science (AAAS), 2021, 7 (39), ⟨10.1126/sciadv.abj1807⟩. ⟨hal-03370482⟩

Share

Metrics

Record views

38

Files downloads

25