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Emergence of continents above sea‐level influences sediment melt composition

Liebmann, J. and Spencer, C. J. and Kirkland, C. L. and Bucholz, C. E. and He, X. and Santosh, M. and Xia, X. P. and Martin, L. and Evans, N. J. (2021) Emergence of continents above sea‐level influences sediment melt composition. Terra Nova . ISSN 0954-4879. doi:10.1111/ter.12531. (In Press) https://resolver.caltech.edu/CaltechAUTHORS:20210503-125957872

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Abstract

The Archean‐Proterozoic transition heralded a number of fundamental changes on Earth, including the oxygenation of the atmosphere, a marked emergence of continents above sea‐level, and an increase in δ¹⁸O of felsic magmas. The potential drivers for the latter are changes in the composition of supracrustal material or increased crustal reworking. Although the onset of subduction‐induced continental collision and associated enhanced crustal recycling could produce high‐δ¹⁸O felsic magmas, temporally constrained zircon δ¹⁸O reveals an increase in δ¹⁸O at ~2.35 Ga that predates the oldest widely recognized supercontinent. In this work, we use the O and Hf isotope ratios of magmatic zircon crystals in Archean and Proterozoic sediment‐derived granitoids of the North China Craton to track the incorporation of supracrustal material into magmas. The results are consistent with a Paleoproterozoic increase of continental freeboard producing sedimentary reservoirs with comparatively elevated δ¹⁸O that subsequently partially melted to generate the granitoids.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1111/ter.12531DOIArticle
ORCID:
AuthorORCID
Kirkland, C. L.0000-0003-3367-8961
Bucholz, C. E.0000-0001-5332-8278
Additional Information:© 2021 Wiley. Accepted manuscript online: 27 April 2021.
DOI:10.1111/ter.12531
Record Number:CaltechAUTHORS:20210503-125957872
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210503-125957872
Official Citation:Liebmann, J., Spencer, C., Kirkland, C., Bucholz, C., He, X., Santosh, M., Xia, X., Martin, L. and Evans, N. (2021), Emergence of continents above sea‐level influences sediment melt composition. Terra Nova. Accepted Author Manuscript. https://doi.org/10.1111/ter.12531
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108943
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:03 May 2021 22:32
Last Modified:03 May 2021 22:32

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