Genesis of Dunite from the Guli Puton according to Olivine-Hosted Melt Inclusion Data

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, CO 2 , F, H 2 O, slightly Cl) and contained high amount of incompatible elements. In add...

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Bibliographic Details
Published inPetrology Vol. 32; no. 2; pp. 201 - 214
Main Authors Panina, L. I., Isakova, A. T., Rokosova, E. Yu
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.04.2024
Springer Nature B.V
Subjects
Basalt
Carbon dioxide
Chromite
Crystallization
Dunite
Earth and Environmental Science
Earth Sciences
Geochemistry
Inclusions
Lava
Magma
Magma chambers
Melts
Mineralogy
Olivine
Plutons
Guli pluton
primary melt inclusions
picrite–meimechite melt
dunite
melanephelinite melt
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Summary: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, CO 2 , F, H 2 O, 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.
ISSN:0869-5911
1556-2085
DOI:10.1134/S0869591124020061