Four-dimensional context of Earth's supercontinents
Four-dimensional context of Earth's supercontinents
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DOI：
10.1144/sp424.12
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发表时间：
2016-01-01
期刊：
影响因子：
--
通讯作者：
Murphy, J. B.
中科院分区：
文献类型：
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作者：
Evans, D. A. D.;Li, Z. X.;Murphy, J. B.
超大陆旋回假说将全球规模的幕式构造事件归因于一种内在的地幔对流自组织模式，这种模式由大陆岩石圈的浮力控制，在旧洋盆关闭期间抵制俯冲，并随之而来的地幔对流单元的重组导致新洋盆的打开。周期的特征时间尺度通常为500-700马币。所提出的旋回性的空间模式从半球(内倾)到反足(外倾)，再到精确地在这些末端成员之间(正外翻)。理论或数值模拟、与大陆重建相关的原始数据获取以及板块运动学、地球动力学事件和古环境历史之间的时空相关性可以促进我们的理解。地球上的超大陆构造的古地理记录仍在开发中。这份特别出版物中的贡献提供了这些调查的时间快照，并表明地球的古地理记录包含了所有三个末端成员空间模式的要素。
The supercontinent-cycle hypothesis attributes planetary-scale episodic tectonic events to an intrinsic self-organizing mode of mantle convection, governed by the buoyancy of continental lithosphere that resists subduction during closure of old ocean basins, and consequent reorganization of mantle convection cells leading to opening of new ocean basins. Characteristic timescales of the cycle are typically 500-700 myr. Proposed spatial patterns of cyclicity range from hemispheric (introversion) to antipodal (extroversion), to precisely between those end-members (orthoversion). Advances in our understanding can arise from theoretical or numerical modelling, primary data acquisition relevant to continental reconstructions, and spatiotemporal correlations between plate kinematics, geodynamic events and palaeoenvironmental history. The palaeogeographic record of supercontinental tectonics on Earth is still under development. The contributions in this special publication provide snap-shots in time of these investigations and indicate that Earth's palaeogeographic record incorporates elements of all three endmember spatial patterns.