Geochemical features and geodynamic conditions for the formation of Devonian gabbro-granitoid intrusions of the Reftinskiy polychronic, polyformational massif (Eastern zone of the Middle Urals)

Abstract

In this paper, several intrusions intruding the Reftinskiy massif are reviewed. All these bodies have the same geological position and form a chain along the western boundary of the Reftinsky massif. The massif itself has a complex polychronic, polyformational structure; the studied bodies in its composition are the youngest igneous rocks. The author obtained reliable data on the age of one of these bodies (Peshcherninsky stock) 396 ± 3 Ma. According to petro- and geochemical studies, Devonian gabbro-granitoid intrusions have common features of the material composition and form a single trend in the evolution of the rock complex in the Eastern zone of the Middle Urals. The data obtained allow us to assert that a number of plutons breaking through the Reftinsky massif were formed during the same episode of magmatism, and in a certain, island-arc geodynamic setting.