TY - JOUR

T1 - Role of Liquid Immiscibility in the Formation of the Rare Metal Granites of the Katugin Massif, Aldan Shield

AU - Tolmacheva, E. V.

AU - Velikoslavinskii, S. D.

AU - Kotov, A. B.

AU - Larin, A. M.

AU - Sklyarov, E. V.

AU - Gladkochub, D. P.

AU - Donskaya, T. V.

AU - Skovitina, T. M.

AU - Kovach, V. P.

AU - Galankina, O. L.

N1 - This work was supported by ongoing institutional funding for the Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, project FMUW-2022-0003 and grant 22-27-00191, ( https://rscf.ru/project/22-27-00191/ ) from the Russian Science Foundation. No additional grants to carry out or direct this particular research were obtained.

PY - 2024/7/15

Y1 - 2024/7/15

N2 - The paper discusses possible immiscibility between fluoride salt (“cryolite”) and silicate liquids into which the parental melt of the Katugin massif exsolves, and the petrological implications of this phenomenon. Results of a detailed study of the cryolite and zircon are presented. Liquid immiscibility is demonstrated to have triggered the massive crystallization of zircon and, together with the processes of subsequent evolution of the cryolite melt, contributed to the formation of the large cryolite bodies. Data on mineral-hosted inclusions were used to estimate the crystallization temperatures of fluoride salt and silicate melts and outline the pathways of their evolution during the formation of the massif. It is shown that the granites of the Katugin and West Katugin massifs were most likely derived from distinct sources, that differed mainly in fluorine content. Data on the chemical composition of three zircon generations identified in the granites of the Katugin massif are presented.

AB - The paper discusses possible immiscibility between fluoride salt (“cryolite”) and silicate liquids into which the parental melt of the Katugin massif exsolves, and the petrological implications of this phenomenon. Results of a detailed study of the cryolite and zircon are presented. Liquid immiscibility is demonstrated to have triggered the massive crystallization of zircon and, together with the processes of subsequent evolution of the cryolite melt, contributed to the formation of the large cryolite bodies. Data on mineral-hosted inclusions were used to estimate the crystallization temperatures of fluoride salt and silicate melts and outline the pathways of their evolution during the formation of the massif. It is shown that the granites of the Katugin and West Katugin massifs were most likely derived from distinct sources, that differed mainly in fluorine content. Data on the chemical composition of three zircon generations identified in the granites of the Katugin massif are presented.

KW - Aldan shield

KW - Katugin massif

KW - cryolite

KW - liquid immiscibility

KW - mineral-hosted inclusions

KW - zircon

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85198649019&origin=inward&txGid=9b0a68a5d585bab14e798e289747673e

UR - https://www.mendeley.com/catalogue/b151b4e6-2d34-3898-9d70-45d6e0577a75/

U2 - 10.1134/S0869591124700127

DO - 10.1134/S0869591124700127

M3 - Article

VL - 32

SP - 551

EP - 568

JO - Petrology

JF - Petrology

SN - 0869-5911

IS - 4

ER -