Dikes and sills of dolerites, essexite–dolerites, diorites, monzodiorites, and lamprophyres belonging to the Musyur (Malyi Khanmey) hypabyssal complex (Polar Urals) cut all Ordovician–Middle Devonian oceanic and island arc formations. Based on the geological data and previous isotope dating, the age of this complex is estimated from the end of the Late Devonian to the Early Triassic. The 40Ar/39Ar dating of hypabyssal magmatic bodies (various intrusive phases) of the Musyur complex was performed for the first time for the northern part of the Urals. The following 40Ar/39Ar ages were obtained: 349 ± 3, 347 ± 9, 339 ± 4, 334 ± 3, and 313 ± 10 Ma. They recorded the collision of the Polar Ural island-arc system with the continent of Arct–Laurussia (Arctida + Baltica + Laurentia), which led to the formation of the Carboniferous Early Ural Orogen. The prevailing northwestern (transversely to the supposed orogen) strike of most dikes in the Toupugol–Khanmeyshor area, predominantly the subduction zone geochemical features of the rocks (low and moderate TiO2 contents (0.7–2.1 wt %), P2O5 (0.1–0.8 wt %), enrichment in large-ion lithophile elements (Cs, Rb, Ba, Pb, Sr) compared to high-field-strength trace elements, the Ta–Nb minimum, and Pb and Th–U maxima), and the Early Carboniferous age estimates (349–334 Ma) lead to the conclusion that they probably formed in a syncollisional setting. The orthogonal northeastern (along the orogen axis) strike of some dikes (essexite–dolerites in more southerly regions), significantly higher concentrations of TiO2 (3.1–3.6 wt %), P2O5 (0.6–1.3 wt %), high-field-strength (Ta, Nb) and most rare earth elements (Eu, Gd, Tb, Dy, Y, Ho, Er, Tm, Yb, Lu), which are more typical for rift-related and intraplate igneous rocks, and their Late Carboniferous age (313 Ma) may testify to their emplacement in a post-collision setting.

中文翻译：

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极地乌拉尔石炭纪岩浆作用

属于 Musyur (Malyi Khanmey) 浅层复合体 (极地乌拉尔) 的辉绿岩、esexite-辉绿岩、闪长岩、二长闪长岩和灯岩岩脉和岩床切割了所有奥陶纪-中泥盆纪海洋和岛弧地层。根据地质资料和以前的同位素测年，该复合体的年龄估计为晚泥盆世末期至早三叠世。首次对乌拉尔山脉北部进行了 Musyur 杂岩下浅层岩浆体（各种侵入相）的 40Ar/39Ar 测年。获得了以下 40Ar/39Ar 年龄：349±3、347±9、339±4、334±3 和 313±10 Ma。他们记录了极地乌拉尔岛弧系统与 Arct-Laurussia 大陆（Arctida + Baltica + Laurentia）的碰撞，导致了石炭纪早期乌拉尔造山带的形成。Toupugol-Khanmeyshor 地区大多数岩脉的主要西北部（与假定的造山带横向）走向，主要是岩石的俯冲带地球化学特征（低和中等 TiO2 含量（0.7-2.1 wt%）、P2O5（0.1-0.8 wt%） %)，与高场强微量元素相比，大离子亲石元素（Cs、Rb、Ba、Pb、Sr）的富集、Ta-Nb 最小值、Pb 和 Th-U 最大值），以及早石炭世年龄估计（349-334 Ma）得出的结论是它们可能是在同步碰撞环境中形成的。一些岩脉的正交东北（沿造山带轴）走向（更南地区的深橄榄岩-辉绿岩），显着更高浓度的 TiO2（3.1-3.6 wt%）、P2O5（0.6-1.3 wt%），高场强(Ta, Nb) 和大多数稀土元素 (Eu, Gd, Tb, Dy, Y, Ho, Er, Tm, Yb, Lu),