Thermal state and evolving geodynamic regimes of the Meso- to Neoarchean North China Craton.
Thermal state and evolving geodynamic regimes of the Meso- to Neoarchean North China Craton.
复制标题
华北克拉通中-新太古代热状态及演化地球动力学模式
DOI：
10.1038/s41467-021-24139-z
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发表时间：
2021-06-23
影响因子：
16.6
通讯作者：
Hu F
中科院分区：
文献类型：
--
作者：
Sun G;Liu S;Cawood PA;Tang M;van Hunen J;Gao L;Hu Y;Hu F
太古代陆壳的约束厚度和地温梯度是了解早期地球动力学机制的关键。太古代壳源英云闪长质-奥长质-花岗闪长质片麻岩是恢复早期陆壳热状态的理想岩性。将实验结果与华北陆块东部的岩石化学数据相结合，可以建立陆块厚度、地温梯度和基底热流的时空变化，我们将其与中太古代晚期地幔冷却位温和由此产生的垂直构造引起的地球动力学变化联系起来（~2.9 Ga）到新太古代早期至晚期（~2.7-2.5 Ga）的板块构造热俯冲。在这里，我们表明，过渡到板块构造体制中起着重要的作用，在地幔的快速冷却，增厚和加强的岩石圈，这反过来又促使稳定的太古代末期的岩石圈。制约岩石圈的热状态是理解早期地球动力学机制的关键。利用TTG重建了华北地区大陆岩石圈~2.9- 2.5Ga的热结构，提出了系统的太古代地球动力学演化过程。
Constraining thickness and geothermal gradient of Archean continental crust are crucial to understanding geodynamic regimes of the early Earth. Archean crust-sourced tonalitic–trondhjemitic–granodioritic gneisses are ideal lithologies for reconstructing the thermal state of early continental crust. Integrating experimental results with petrochemical data from the Eastern Block of the North China Craton allows us to establish temporal–spatial variations in thickness, geothermal gradient and basal heat flow across the block, which we relate to cooling mantle potential temperature and resultant changing geodynamic regimes from vertical tectonics in the late Mesoarchean (~2.9 Ga) to plate tectonics with hot subduction in the early to late Neoarchean (~2.7–2.5 Ga). Here, we show the transition to a plate tectonic regime plays an important role in the rapid cooling of the mantle, and thickening and strengthening of the lithosphere, which in turn prompted stabilization of the cratonic lithosphere at the end of the Archean. Constraining the thermal state of the lithosphere is crucial to understanding geodynamic regime in early Earth. Here the authors reconstruct ~2.9–2.5 Ga thermal structure of continental lithosphere of the North China Craton using TTG and propose a systematic Archean geodynamic evolution process.
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影响因子：
5.3
作者：
Capitanio, F. A.;Nebel, O.;Clos, F.
通讯作者：
Clos, F.
影响因子：
5.3
作者：
Huang, Bo;Kusky, Timothy M.;Fu, Dong
通讯作者：
Fu, Dong
影响因子：
56.9
作者：
Dhuime, Bruno;Hawkesworth, Chris J.;Storey, Craig D.
通讯作者：
Storey, Craig D.
影响因子：
18.3
作者：
Dhuime, Bruno;Wuestefeld, Andreas;Hawkesworth, Chris J.
通讯作者：
Hawkesworth, Chris J.
影响因子：
3.4
作者：
Green, E. C. R.;White, R. W.;Palin, R. M.
通讯作者：
Palin, R. M.