Возраст протолитов и геохронология метаморфизма Неркаюского эклогит-сланцевого комплекса Приполярного Урала

A. M. Pystin, E. V. Kushmanova, Yu. I. Pystina, A. V. Panfilov, I. L. Potapov

Аннотация


Приведены первые результаты U-Pb датирования цирконов из метаморфических пород неркаюского эклогит-сланцевого комплекса. Минимальный возраст детритовых цирконов позволяет предположить, что исходные осадочные образования – протолиты гранат-слюдяных кристаллических сланцев – сформировались в палеопротерозое. Время проявления раннего этапа метаморфизма пород датируется рубежом около 2.0 млрд лет назад. Эти данные подтверждает давно разрабатываемое авторами представление о неркаюском эклогит-сланцевом комплексе, как о тектонически перемещенном фрагменте нижнедокембрийского кристаллического основания, вовлеченного в структуру уралид.

Ключевые слова


Приполярный Урал; нижний докембрий; протолит; эклогит; геохронология.

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Литература


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DOI: http://dx.doi.org/10.17072/psu.geol.18.2.96

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