Was Baltica part of Rodinia?

IF 2.2 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Terra Nova Pub Date : 2022-12-20 DOI:10.1111/ter.12640
T. Slagstad, E. Kulakov, M. Anderson, K. Saalmann, C. Kirkland, I. Henderson, M. Ganerød
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引用次数: 0

Abstract

Late Ediacaran opening of the Iapetus Ocean is typically considered to reflect separation of Baltica and Laurentia during final breakup of the Rodinia supercontinent, with subsequent closure during the Caledonian Orogeny. However, evidence of the pre‐opening juxtaposition of Baltica and Laurentia is limited to purportedly similar apparent polar wander paths and correlation of Rodinia‐forming orogenic events. We show that a range of existing data do not unequivocally support correlation of these orogens, and that geologic and palaeomagnetic data instead favour separation of Baltica and Laurentia as early as 1.1–1.2 Ga. Furthermore, new detrital zircon U–Pb age and Ar–Ar thermochronological data from Norway point towards an active western Baltican margin throughout most of the Neoproterozoic and early Palaeozoic. These findings are inconsistent with the majority of palaeogeographic reconstructions that place Baltica near the core of the Rodinia supercontinent.
波罗的海是罗丁尼亚的一部分吗?
伊迪卡拉纪晚期,Iapetus洋的打开通常被认为反映了罗丁尼亚超大陆最终分裂期间波罗的海和劳伦西亚的分离,随后在加里东造山运动期间关闭。然而,波罗的海和劳伦西亚在开放前并置的证据仅限于据称相似的明显极移路径和罗迪尼亚形成造山事件的相关性。我们表明,现有的一系列数据并不能明确支持这些造山带的相关性,而地质和古地磁数据更倾向于早在1.1-1.2 Ga的波罗的海和劳伦西亚的分离。此外,挪威新的碎屑锆石U-Pb年龄和Ar-Ar热年代学数据表明,在新元古代和早古生代的大部分时间里,波罗的海西部边缘处于活跃状态。这些发现与大多数将波罗的海置于罗丁尼亚超大陆核心附近的古地理重建不一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Terra Nova
Terra Nova 地学-地球科学综合
CiteScore
4.80
自引率
8.30%
发文量
59
审稿时长
2.3 months
期刊介绍: Terra Nova publishes short, innovative and provocative papers of interest to a wide readership and covering the broadest spectrum of the Solid Earth and Planetary Sciences. Terra Nova encompasses geology, geophysics and geochemistry, and extends to the fluid envelopes (atmosphere, ocean, environment) whenever coupling with the Solid Earth is involved.
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