Abstract—This article describes the geological structure of the Sarsangi gabbro–diorite–plagiogranite complex located in the boundary zone between the Middle and South Urals. The formation of its massifs took place in the Late Silurian in the abyssal zone at approximately 6.5–7.0 km. The temperature ranges of crystallization of granodiorites and gabbro were 900–990°С and 1180–1280°С, respectively. The pressure in the system at that time was 190–200 MPa. Gabbroids in the massifs were formed under conditions of extension of the oceanic crust. In terms of petrogeochemistry, they correspond to rocks that compose the basement of island arcs and belong to the ophiolite formation.

摘要——本文描述了位于中乌拉尔和南乌拉尔边界带的 Sarsangi 辉长岩-闪长岩-斜长花岗岩复合体的地质结构。其地块的形成发生在深海带的晚志留纪约 6.5-7.0 公里处。花岗闪长岩和辉长岩的结晶温度范围分别为 900-990°С 和 1180-1280°С。当时系统内的压力为 190-200 MPa。地块中的辉长岩是在洋壳伸展的条件下形成的。在岩石地球化学方面，它们对应于构成岛弧基底的岩石，属于蛇绿岩地层。