THE RELATIONSHIP BETWEEN KIMBERLITE AND BASALT MAGMATISM IN THE NAKYN FIELD OF THE YAKUTIAN KIMBERLITE PROVINCE BASED ON THE STUDY OF THE NYURBA PIPE
The paper touches upon the relationships between kimberlite and basalt magmatism in the Nakyn field of the Yakutian kimberlite province. It was established, that the source for melts of pre-kimberlite basite was the ancient enriched lithosphere mantle probably with participation of the ancient lower crust substance (EM II) and post-kimberlite basite, i.e. the depleted mantle feasibly with the younger upper crust substance involved. The impact of basalt melt on kimberlites of the Nyurba pipe proceeds as moderate thermal metamorphism, with the kimberlite rocks in the zone of exocontact acquiring increased strength and notably increased magnetic susceptibility.