P-T Paths of Cooling and Metamorphism under Conditions of Low-Grade Amphibolite Facies in the Xenoliths of Granulites in the Siberian Craton

Article Geosciences, Multidisciplinary

Features of the Structures and Evolution of the Lower Part of the Continental Crust of the Yakutian Diamondiferous Province within the Upper Muna Kimberlite Field

V. S. Shatsky et al.

Summary: Study of xenoliths of crustal rocks from the Novinka kimberlite pipe reveals the composition of pyroxene and garnet-pyroxene crystal schists and garnet-pyroxene gneisses in different levels of the crust. The mineral assemblages of crystal schists suggest their formation under cooling conditions with constant pressure, while the presence of sodalite indicates the presence of highly saline brines during the final stages of rock cooling. The U-Pb age of zircons indicates a tectono-thermal event during the Neoarchean period. These findings provide insights into the crustal heterogeneity of the Yakutsk diamondiferous province.

DOKLADY EARTH SCIENCES (2022)

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Article Geology

Water Content and Deformation of the Lower Crust beneath the Siberian Craton: Evidence from Granulite Xenoliths

Tianlong Jin et al.

Summary: The lower crust in the Siberian Craton is found to be rich in water, with a continuous cooling trend since the Late Devonian. Water content in the lower crust may be linked to partial melting processes within the crust.

JOURNAL OF GEOLOGY (2021)

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Article Geosciences, Multidisciplinary

Reduced amphibolite facies conditions in the Precambrian continental crust of the Siberian craton recorded by mafic granulite xenoliths from the Udachnaya kimberlite pipe, Yakutia

A. L. Perchuk et al.

Summary: The study of granulite xenoliths from the Udachnaya kimberlite pipe in Yakutia revealed a mineral assemblage formed under amphibolite facies conditions with reduced oxygen fugacity and elevated temperatures. The rocks did not equilibrate to the temperatures of the geotherm due to mineral reactions being blocked under relatively low temperatures and fluid-deficient conditions.

PRECAMBRIAN RESEARCH (2021)

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Article Mineralogy