Paleomagnetic constraints on the duration of the Australia-Laurentia connection in the core of the Nuna supercontinent | Zendy

Uwe Kirscher | Zendy; Ross N. Mitchell | Zendy; Yebo Liu | Zendy; Adam Nordsvan | Zendy; Grant M. Cox | Zendy; Sergei Pisarevsky | Zendy; Chong Wang | Zendy; Lei Wu | Zendy; J. Brendan Murphy | Zendy; ZhengXiang Li | Zendy

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Paleomagnetic constraints on the duration of the Australia-Laurentia connection in the core of the Nuna supercontinent

Author(s) -

Uwe Kirscher,

Ross N. Mitchell,

Yebo Liu,

Adam Nordsvan,

Grant M. Cox,

Sergei Pisarevsky,

Chong Wang,

Lei Wu,

J. Brendan Murphy,

ZhengXiang Li

Publication year - 2020

Publication title -

geology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.609

H-Index - 215

eISSN - 1943-2682

pISSN - 0091-7613

DOI - 10.1130/g47823.1

Subject(s) - laurentia , supercontinent , rodinia , paleomagnetism , geology , paleontology , apparent polar wander , sill , craton , earth science , ordovician , geochemistry , tectonics

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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