Paleomagnetic Constraints on the Duration of The Australia-Laurentia Connection in the Core of the Nuna Supercontinent
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Open access
Authors
Kirscher, Uwe
Mitchell, Ross
Liu, Yebo
Nordsvan, Adam
Cox, Grant
Pisarevsky, Sergei
Wang, Chong
Wu, Lei
Murphy, J. Brendan
Li, Zheng-Xiang
Date
2020Type
Journal Article
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Kirscher, U. and Mitchell, R.N. and Liu, Y. and Nordsvan, A.R. and Cox, G.M. and Pisarevsky, S.A. and Wang, C. et al. 2020. Paleomagnetic Constraints on the Duration of The Australia-Laurentia Connection in the Core of the Nuna Supercontinent. Geology. 49 (2): pp. 174-179.
Source Title
Geology
DOI
ISSN
Faculty
Faculty of Science and Engineering
School
School of Earth and Planetary Sciences (EPS)
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Abstract
The Australia-Laurentia connection in the Paleoproterozoic to Mesoproterozoic supercontinent Nuna is thought to have initiated by ca. 1.6 Ga when both continents were locked in a proto-SWEAT (southwestern U.S.–East Antarctic) configuration. However, the longevity of that configuration is poorly constrained. Here, we present a new high-quality paleomagnetic pole from the ca. 1.3 Ga Derim Derim sills of northern Australia that suggests Australia and Laurentia were in the same configuration at that time. This new paleopole also supports a connection between Australia and North China and, in conjunction with previously reported data from all continents, indicates that the breakup of Nuna largely occurred between ca. 1.3 and 1.2 Ga.
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