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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.

The article describes the geological structure of the Sarsanginsky gabbro-diorite-plagiogranite complex located in the border zone of the Middle and South Urals. The formation of its massifs took place in the late Silurian time in the abyssal zone at depths of about 6,5–7,0 km. The temperature range of crystallization of granodiorites was 900–990 С, and for gabbro 1180–1280 С. The system pressure at this moment corresponded to 190–200 MPa. The gabbro that make up the massifs under consideration were formed under stretching conditions on the oceanic crust. In terms of petrogeochemical features, they correspond to rocks at the base of island arcs and belong to the ophiolite formation.

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Аннотация. В статье рассмотрено геологическое строение Троицкой площади, расположенной в центральной части Зауральского поднятия. Особое внимание уделено городищенской, алексеевской, чулаксайской свитам, потаповской и комсомольской толщам, в пределах которых развиты углеродистые отложения, а также чебаркульско-казбаевскому и дружнинскому габбро-гипербазитовым комплексам. Все они опробованы на золото, серебро, платину, палладий, вольфрам и молибден. Установлено, что в черносланцевых образованиях городищенской свиты в долине