New Data on the Structure and Age of the Chilekta Granitoid Plutonic Massif (Southern Urals)

This paper reviews the structure and formation history of the Chilekta plutonic massif, located in the East Magnitogorsk zone of the Southern Urals. The pluton is composed of plutonites of two complexes, the Krasninskii (tonalite series) and the Chilekta (subalkaline series). The Chilekta complex of monzodiorites, granosyenites, and moderately alkaline granites was identified for the first time, its isotopic age (380 Ma) was confirmed by U–Pb dating (LA-ICP-MS) on zircons. The Chilekta pluton was formed as a shear magmatic duplex on the NE-trending left-lateral strike-slip fault.