Abstract

A review of the materials obtained over the past decade on the geology and tectonics of the North Urals and its continuation in the basement of the West-Siberian Plate allows us to clarify and supplement characteristics of the geological features of the region, and substantiate our new conclusions. We suggested more precise vertical division of complexes developed in the region into structural stages: Archean‒Paleoproterozoic, Riphean‒Vendian (Timanides), Paleozoic‒Early Jurassic (Uralides, which consist of the Uralide sensu stricto and the Old Kimmerian sub-stages), platform, and the neo-Orogenic stages. New data were presented in support of the initially unified island-arc nature of the Schuchya, Voikar, and Khulga areas of the Tagil arc sensu lato, while an alternative interpretation of the origin of zircon clusters from volcanic-sedimentary island-arc complexes, for which the mantle but not microcontinental source was supposed, is given. A complex orocline structure of the Ural‒Pai-Khoi bend of the primarily linear island arc due to the two-stage collision of the arc with the continent in the Early Carboniferous and then in the Early Jurassic, is characterized. Using PUT sesmic transect and drilling data allowed us to clarify the synform structure of the axial part and the eastern limb of the Tagil synclinorium and its transition to the East Urals zone. New data have been obtained confirming the existence of a northwestern tectonic boundary under the central part of the Yamal Peninsula, which corresponds to the contact of the Paleozoides and the submerged part of the Siberian Platform. An abnormally high concentration of hydrocarbon deposits on the Yamal Peninsula are associated with the presence of rift junction intensively developed over the superplume branch and high-density heat flow, which characterizes the zone of high geodynamic activity permeable to deep fluid-gas flows.

中文翻译：

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北乌拉尔和西西伯利亚的构造：发展通史

摘要

回顾过去十年中在北乌拉尔地区的地质和构造及其在西西伯利亚板块基底中的延续所获得的材料，这使我们能够阐明和补充该地区的地质特征，并证实我们新的结论。我们建议在该地区发展成为结构阶段复合的更精确的垂直分工：太古宙-古元古代，里菲- Vendian（Timanides），古生代-早侏罗世（Uralides，其中包括了Uralide的狭义和旧Kimmerian子阶段），平台和新造山阶段。新数据支持的塔吉尔弧Schuchya，Voikar和Khulga领域的最初统一的岛弧性质提出意义上拉托，同时给出了锆石团簇起源于火山沉积的岛弧复合体的另一种解释，认为是地幔而非微陆源。表征了主要线性岛弧的Ural-Pai-Khoi弯头的复杂斜交线结构，这是由于弧与早期石炭纪然后侏罗纪与大陆的两阶段碰撞所致。利用PUT的横断面和钻探数据，我们可以弄清Tagil合斜齿轴部分和东肢的同形结构及其过渡到东乌拉尔带。已获得新数据，证实在亚马尔半岛中部下方存在西北构造边界，这对应于古生界与西伯利亚平台淹没部分的接触。