Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/130677
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Emergence of continents above sea-level influences sediment melt composition |
Author: | Liebmann, J. Spencer, C.J. Kirkland, C.L. E. Bucholz, C. He, X.F. Santosh, M. Xia, X.P. Martin, L. Evans, N.J. |
Citation: | Terra Nova, 2021; 33(5):465-474 |
Publisher: | Wiley |
Issue Date: | 2021 |
ISSN: | 0954-4879 1365-3121 |
Statement of Responsibility: | Janne Liebmann, Christopher J. Spencer, Christopher L. Kirkland, Claire E. Bucholz, Xiao-Fang He, M. Santosh, Xiaoping P. Xia, Laure Martin, Noreen J. Evans |
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. |
Rights: | © 2021 John Wiley & Sons Ltd |
DOI: | 10.1111/ter.12531 |
Grant ID: | http://purl.org/au-research/grants/arc/LE150100013 |
Published version: | http://dx.doi.org/10.1111/ter.12531 |
Appears in Collections: | Aurora harvest 8 Geology & Geophysics publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.