Abstract
Olivine from the dunite of the Guli pluton crystallized from olivine–melanephelinite magma at temperatures above 1260°C according to the melt inclusion study. The melts were enriched with volatile components (S, CO2, F, H2O, slightly Cl) and contained high amount of incompatible elements. In addition, olivine hosts sporadic inclusions of picrite-basalt composition, which are close to picrite–meimechite melts preserved in chromite from dunite according to literature data. This suggests the influx of picrite–meimechite melts and their mixing with melanephelinite magma during the formation of dunites in the magma chamber. Based on the indicator ratios of incompatible elements, these melts and melanephelinite magma had different sources, which were located in undepleted mantle at different depths and derived through different degree of partial melting.
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ACKNOWLEDGMENTS
We are grateful to I.P. Solovova and anonymous reviewer whose critical comments significantly improved the manuscript.
Funding
This work was made in the framework of the government-financed task of the Institute of Geology and Mineralogy of the Siberian Branch, Russian Academy of Sciences (project no. 122041400312-2).
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Panina, L.I., Isakova, A.T. & Rokosova, E.Y. Genesis of Dunite from the Guli Puton according to Olivine-Hosted Melt Inclusion Data. Petrology 32, 201–214 (2024). https://doi.org/10.1134/S0869591124020061
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DOI: https://doi.org/10.1134/S0869591124020061