A pilot palaeomagnetic study was conducted on the recently dated with in situ SHRIMP U-Pb method at 1134 ± 9 Ma (U-Pb, zircon and baddeleyite) Bunger Hills dykes of the Mawson Craton (East Antarctica). Of the six dykes sampled, three revealed meaningful results providing the first well-dated Mesoproterozoic palaeopole at 40.5°S, 150.1°E (A₉₅ = 20°) for the Mawson Craton. Discordance between this new pole and two roughly coeval poles from Dronning Maud Land and Coats Land (East Antarctica) demonstrates that these two terranes were not rigidly connected to the Mawson Craton ca. 1134 Ma. Comparison between the new pole and that of the broadly coeval Lakeview dolerite from the North Australian Craton supports the putative ~40° late Neoproterozoic relative rotation between the North Australian Craton and the combined South and West Australian cratons. A mean ca. 1134 Ma pole for the Proto-Australia Craton is calculated by combining our new pole and that of the Lakeview dolerite after restoring the 40° intracontinental rotation. A comparison of this mean pole with the roughly coeval Abitibi dykes pole from Laurentia confirms that the SWEAT reconstruction of Australia and Laurentia was not viable for ca. 1134 Ma.

中文翻译：

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来自Mawson Craton（East Antarctica）的第一个前寒武纪古地磁数据和构造意义。

对最近用原位SHRIMP U-Pb方法在1134±9 Ma（U-Pb，锆石和Baddeleyite）的Mawson Craton（南极东部）的Bunger Hills堤进行了古地磁试验。在采样的六个堤坝中，有三个揭示出有意义的结果，它们在40.5°S，150.1°E（A ₉₅ = 20°）。这个新的极点与Dronning Maud Land和Coats Land（南极东部）的两个粗略的近代极点之间的不一致表明，这两个地层并未与加利福尼亚州的Mawson Craton牢固地相连。1134马。新的极点与北澳大利亚克拉通的宽阔的Lakeview白云岩的极点之间的比较支持了北澳大利亚克拉通与南澳大利亚和西澳大利亚克拉通组合后的新元古代晚期大约40°的相对旋转。平均值约 在恢复40°洲内旋转后，结合新的极点和湖景白云岩的极点，计算出原始澳大利亚克拉通的1134 Ma极点。将这一平均极点与劳伦蒂亚的大约同时代的阿比蒂比堤极进行比较，证实了澳大利亚和劳伦蒂亚的SWEAT重建方案在约20年内是不可行的。1134马。