Минералогия и P-T условия образования амфиболитов няртинского метаморфического комплекса и маньхобеинской свиты Приполярного Урала

K. S. Popvasev

Аннотация


В статье приведены результаты изучения амфиболитов няртинского метаморфического комплекса и маньхобеинской свиты. По петрографическим и минеральным особенностям пород, химической зональности гранатов установлены два эпизода проявления метаморфизма. Первый эпизод – более высокотемпературный (500–620°С), отвечающий условиям эпидот–амфиболитовой фации (B3). Давлениена этом этапе оценено в 6–10 кбар. Второй эпизод отвечает низкотемпературному диафторезу (284–318°С) в условиях фации зеленых сланцев (B4). Аналогичные условия метаморфизма пород няртинского комплекса и маньхобеинской свиты подтверждают представление о том, что маньхобеинская свита не является самостоятельным стратиграфическим подразделением, а представляет собой комплекс низкотемпературных диафторитов по породам, аналогичным тем, которыми сложен няртинский комплекс.

Ключевые слова


P-T условия метаморфизма; няртинский комплекс; амфиболиты; эпидот-амфиболитовая фация

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Литература


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DOI: http://dx.doi.org/10.17072/psu.geol.21.3.216

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