Crystallization conditions of olivine in dunites of the Guli massif (Siberian Platform) are established using petrological, geochemical, mineralogical and thermobarogeochemical methods. The formation of olivine and chromite from picrite-meimechite ultramafc magmas was followed by the fractionation of clinopyroxenes from basaltic systems with the formation of residual high-alkaline melts. The calculations in PETROLOG and COMAGMAT programs based on the compositions of inclusions and minerals, as well as using olivine-spinel geothermometer, showed that a magmatic system, which was responsible for the formation of dunites of the Guli massif, evolved during the crystallization of olivine in a wide temperature range of 1520–1250 °C in a magma chamber at a depth of about 17 km.

Keywords: olivine, crystallization conditions, melt inclusions, dunite, Guli massif, Siberian Platform.

Funding. This work was supported by state contracts of the Institute of Geology and Mineralogy SB RAS, projects nos. 122041400057-2 and 122041400312-2.

Confict of interest.The authors declare that they have no conficts of interest.

Author contribution. V.A. Simonov, Yu.R. Vasiliev – conceptualization, investigation; V.V. Sharygin – analytical/experimental works; V.A. Simonov, A.V. Kotlyarov, V.V. Sharygin – writing – original draft; V.A. Simonov, A.V. Kotlyarov – visualization, writing – review & editing. All the authors approved the fnal version of the manuscript prior to publication.

For citation: Simonov V.A., Kotlyarov A.V., Sharygin V.V., Vasiliev Yu.R. Crystallization conditions of oliv-ine in dunites the Guli massif, Siberian platform. Mineralogy, 10 (1), 16–31. DOI: 10.35597/2313-545X-2024-10-1-2.

Received 04.12.2023, revised 30.01.2024, accepted 01.02.2024

V.A. Simonov, Institute of Geology and Mineralogy SB RAS, pr. Akademika Koptyuga 3, Novosibirsk, 630090 Russia;

A.V. Kotlyarov, Institute of Geology and Mineralogy SB RAS, pr. Akademika Koptyuga 3, Novosibirsk, 630090 Russia; kotlyarov@igm.nsc.ru

V.V. Sharygin, Institute of Geology and Mineralogy SB RAS, pr. Akademika Koptyuga 3, Novosibirsk, 630090 Russia; 

Yu.R. Vasiliev, Institute of Geology and Mineralogy SB RAS, pr. Akademika Koptyuga 3, Novosibirsk, 630090 Russia

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