Articles | Volume 11, issue 5
https://doi.org/10.5194/se-11-1653-2020
https://doi.org/10.5194/se-11-1653-2020
Research article
 | 
04 Sep 2020
Research article |  | 04 Sep 2020

Precambrian faulting episodes and insights into the tectonothermal history of north Australia: microstructural evidence and K–Ar, 40Ar–39Ar, and Rb–Sr dating of syntectonic illite from the intracratonic Millungera Basin

I. Tonguç Uysal, Claudio Delle Piane, Andrew James Todd, and Horst Zwingmann

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Subject area: Tectonic plate interactions, magma genesis, and lithosphere deformation at all scales | Editorial team: Structural geology and tectonics, paleoseismology, rock physics, experimental deformation | Discipline: Structural geology
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Cited articles

Aitken, A. R. A., Smithies, R. H. M. C., Dentith, M. C., Joly, A., Evans, S., and Howard H. M.: Magmatism-dominated intracontinental rifting in the Mesoproterozoic: The Ngaanyatjarra Rift, central Australia, Gondwana Res., 24, 886–901, https://doi.org/10.1016/j.gr.2012.10.003, 2013. 
Algea, L., Viola, G., Casas-Sainz, A., Marcén, M., Román-Berdiel, T., and van der Lelij, R.: Unraveling multiple thermo-tectonic events accommodated by crustal-scale faults in northern Iberia, Spain: Insights from K-Ar dating of clay gouges, Tectonics, 38, 3629–3651, https://doi.org/10.1029/2019TC005585, 2019. 
Árkai, P.: Chlorite crystallinity: an empirical approach and correlation with illite crystallinity, coal rank and mineral facies as exemplified by Palaeozoic and Mesozoic rocks of northeast Hungary, J. Metamorph. Geol., 9, 723–734, https://doi.org/10.1111/j.1525-1314.1991.tb00561.x, 1991. 
Babaahmadi, A., Uysal, I. T., and Rosenbaum, G.: Late Jurassic intraplate faulting in eastern Australia: a link to subduction in eastern Gondwana and plate tectonic reorganisation, Gondwana Res., 66, 1–12, https://doi.org/10.1016/j.gr.2018.09.003, 2019. 
Balsamo, F., Aldega, L., De Paola, N., Faoro, I., and Storti, F.: The signature and mechanics of earthquake ruptures along shallow creeping faults in poorly lithified sediments, Geology, 42, 435–438, https://doi.org/10.1130/G35272.1 2014. 
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Short summary
This study represents an integrated approach to radiometric age dating using potassium-bearing clay minerals formed during faulting and provides insights into the enigmatic time–space distribution of Precambrian tectonic zones in north-central Australia. Specifically, our work firmly indicates a late Mesoproterzoic minimum age for the Millungera Basin in north Australia and a previously unrecorded concealed late Mesoproterozoic–early Neoproterozoic tectonic event in north-central Australia.