The correlation of Neoproterozoic granitoid magmatism of the New Siberian Islands, Wrangel Island, Chukotka, the Chukchi Borderland, and Northern Alaska indicates integrity of the Arctic Alaska–Chukotka microplate basement and the formation of the continental crust during the Timanian (Baikalian) orogeny. The age of inherited cores of zircons and the Nd model age point out the participation of the Meso- and, less frequently, Paleoproterozoic crust in the formation of the epi-Grenville Arctida continent. In the modern structure, Timanides extended from the Timan Range through the Polar Urals and Taimyr to Chukotka and Northern Alaska, framing the margins of the Baltics, Siberia, and North America continents. It is suggested that the geodynamic setting of Neoproterozoic granitoids for most of the microplate is supra-subduction continental margin, less frequently, rift-related at the late stages of the Timanian orogeny. The origin of the Grenville and Neoproterozoic–Timanian population of detrital and inherited zircons is explained by local provenance areas.

中文翻译：

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北极东部新元古代花岗岩类岩浆作用的构造构造与地球动力学背景

新西伯利亚群岛、弗兰格尔岛、楚科奇、楚科奇边疆区和阿拉斯加北部的新元古代花岗岩类岩浆作用的对比表明了北极阿拉斯加-楚科奇微板块基底的完整性以及提马尼亚（贝加尔）造山运动期间大陆地壳的形成。继承的锆石核的年龄和 Nd 模型年龄表明中、古元古代地壳参与了外格伦维尔 Arctida 大陆的形成。在现代结构中，蒂曼尼德斯从蒂曼山脉延伸到极地乌拉尔和泰米尔到楚科奇和阿拉斯加北部，构成了波罗的海、西伯利亚和北美大陆的边缘。表明大部分微板块的新元古代花岗岩的地球动力学背景是俯冲上大陆边缘，较少见，与蒂曼尼亚造山运动后期的裂谷有关。Grenville 和新元古代-Timanian 碎屑和遗传锆石种群的起源由当地的原产地解释。