Abstract
In the Sn–W greisen deposits of the Karadub ore field, rare arsenates of REEs chernovite-(Y) and gasparite-(Ce), associated with topaz, fluorite, fluocerite, and bastnaesite, have been identified. They replace early xenotime-(Y) and monazite-(Ce). Chernovite-(Y) and gasparite-(Ce) from Sn–W greisens differ in their chemical composition from the same minerals previously described elsewhere. Chernovite-(Y) differs in the minimum content of Y with only 0.47 to 0.26 atoms in the formula (a.p.f.) and a relatively high content of light REEs of 0.111–0.254 (a.p.f.). Gasparite-(Ce) has a high Nd content of 0.28 (a.p.f.). REE arsenates were formed by substituting xenotime (Y), monazite (Ce), and REE-bearing fluorite under strongly oxidizing conditions.
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25 April 2022
An Erratum to this paper has been published: https://doi.org/10.1134/S1028334X22330017
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This work was conducted within the framework of a State Assignment of the Institute of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, on the topic “Structural-Chemical Heterogeneities and Paragenetic Associations of Minerals as a Reflection of the Processes of Petro- and Ore Genesis,” project no. 121041500220-0. XRF and EPMA studies were conducted at the ANALITIKA Center for Collective Use, Institute of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences.
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Gorelikova, N.V., Korostelev, P.G., Semenyak, B.I. et al. Rare Arsenates of REEs and Y in Ores of the Verkhnee Greisen Deposit within the Khingan–Olonoiskii District (Primorye, Russia). Dokl. Earth Sc. 501, 912–918 (2021). https://doi.org/10.1134/S1028334X21110064
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DOI: https://doi.org/10.1134/S1028334X21110064