EVOLUTION OF THE VICTORIA PIPE ULTRAMAFIC ALKALINE MELT (ANABAR REGION, SIBERIAN CRATON): MELT INCLUSION WITHIN OLIVINE AND GROUNDMASS MINERALS
- Authors: Kargin A.V.1,2, Prokopyev I.R.1, Starikova A.E.1, Kamenetsky V.S.3, Golubeva Y.Y.4
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Affiliations:
- V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
- Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences
- Korzhinsky Institute of Experimental Mineralogy, Russian Academy of Science
- Central Research Institute of Geological Prospecting for Base and Precious Metals
- Issue: Vol 512, No 2 (2023)
- Pages: 242-250
- Section: ПЕТРОЛОГИЯ
- URL: https://journals.rcsi.science/2686-7397/article/view/140414
- DOI: https://doi.org/10.31857/S2686739723601369
- EDN: https://elibrary.ru/YICWCJ
- ID: 140414
Cite item
Abstract
To provide new insights into evolution of the primary ultramafic alkaline melts, we present an investigation of the primary and secondary melt inclusions within olivine macrocrysts and groundmass minerals from the Victoria monticellite-nepheline damtjernite, Anabar diamondiferous province, Siberia craton. The primary melt inclusions within olivine macrocrysts shown that initial damtjernite melts were K–Na bearing carbonate-silicate melts by composition whereas the K and Na associated within only silicate phases like that phlogopite, nepheline, kalsilite. That distinguishes these inclusions from similar inclusions in olivines from aillikites and kimberlites and emphasizes a more alkaline character of the damtjernitic parental melts. Based on the composition of melt inclusions within spinel and monticellite from magmaclastic groundmass, under the further evolution of the damtjernitic melts, K and Na are not only included in silicate daughter phases, but they can also form alkaline phosphates, carbonates, sulfates, and halides. That led to form the alkaline carbonate and saline sulfate-phosphate-chloride-carbonate liquids. This composition of the evolved ultramafic alkaline melt is common for melt inclusions within different minerals from aillikite, kimberlite and some carbonatites highlighted uniform mechanism of evolution of alkaline-ultramafic melts. Further accumulation of the fluid phase led to its reaction interaction with olivine with the formation of monticellite and degassing processes.
About the authors
A. V. Kargin
V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences; Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences
Author for correspondence.
Email: kargin-igem@mail.ru
Russian, Novosibirsk; Russian,
Moscow
I. R. Prokopyev
V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
Email: kargin-igem@mail.ru
Russian, Novosibirsk
A. E. Starikova
V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences
Email: kargin-igem@mail.ru
Russian, Novosibirsk
V. S. Kamenetsky
Korzhinsky Institute of Experimental Mineralogy, Russian Academy of Science
Email: kargin-igem@mail.ru
Russian, Chernogolovka
Yu. Yu. Golubeva
Central Research Institute of Geological Prospecting for Base and Precious Metals
Email: kargin-igem@mail.ru
Russian, Moscow
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