Alexey N. Kruk

V.S. Sobolev Institute of Geology and Mineralogy

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Alexander G. Sokol

V.S. Sobolev Institute of Geology and Mineralogy

Yuri N. Palyanov

V.S. Sobolev Institute of Geology and Mineralogy

Igor N. Kupriyanov

V.S. Sobolev Institute of Geology and Mineralogy

Yurii V. Seryotkin

V.S. Sobolev Institute of Geology and Mineralogy

Dmitry A. Chebotarev

V.S. Sobolev Institute of Geology and Mineralogy

Ivan D. Novoselov

V.S. Sobolev Institute of Geology and Mineralogy

АА

А. А. Томиленко

V.S. Sobolev Institute of Geology and Mineralogy

Alexander F. Khokhryakov

V.S. Sobolev Institute of Geology and Mineralogy

Yuliya V. Bataleva

V.S. Sobolev Institute of Geology and Mineralogy

ТА

Т. А. Бульбак

V.S. Sobolev Institute of Geology and Mineralogy

Cooperative Institutions

V.S. Sobolev Institute of Geology and Mineralogy

Novosibirsk State University

Siberian Branch of the Russian Academy of Sciences

Russian Academy of Sciences

Institute of Mineralogy

Czech Academy of Sciences, Institute of Geology

Siberian Research Institute of Geology, Geophysics and Mineral Resources

Institute of the Earth’s Crust

Novosibirsk Institute of Organic Chemistry

University of Bari Aldo Moro

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Melting experiments on the Udachnaya kimberlite at 6.3–7.5GPa: Implications for the role of H2O in magma generation and formation of hydrous olivine

Geochimica et Cosmochimica Acta (2012)

Alexander G. Sokol Igor N. Kupriyanov Yuri N. Palyanov Alexey N. Kruk N. V. Sobolev

Liquidus

Mineral redox buffer

Pyroxene

Fugacity

Phenocryst

Pyrope

Xenolith

10.1016/j.gca.2012.10.018

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Citations (48)

Role of Volatiles in the Evolution of a Carbonatitic Melt in Peridotitic Mantle: Experimental Constraints at 6.3 GPa and 1200–1450 °C

Minerals (2022)

Alexey N. Kruk Alexander G. Sokol

Reconstruction of the mechanisms of carbonatitic melt evolution is extremely important for understanding metasomatic processes at the base of the continental lithospheric mantle (CLM). We have studied the interaction between garnet lherzolite and a carbonatitic melt rich in molecular CO2 and H2O in experiments at 6.3 GPa and 1200–1450 °C. The interaction with garnet lherzolite and H2O-bearing carbonatite melt leads to wehrlitization of lherzolite, without its carbonation. Introduction of molecular CO2 and H2O initiates carbonation of olivine and clinopyroxene with the formation of orthopyroxene and magnesite. Partial carbonation leads to the formation of carbonate–silicate melts that are multiphase saturated with garnet harzburgite. Upon complete carbonation of olivine already at 1200 °C, melts with 27–31 wt% SiO2 and MgO/CaO ≈ 1 are formed. At 1350–1450 °C, the interaction leads to an increase in the melt fraction and the MgO/CaO ratio to 2–4 and a decrease in the SiO2 concentration. Thus, at conditions of a thermally undisturbed CLM base, molecular CO2 and H2O dissolved in metasomatic agents, due to local carbonation of peridotite, can provide the evolution of agent composition from carbonatitic to hydrous silicic, i.e., similar to the trends reconstructed for diamond-forming high density fluids (HDFs) and genetically related proto-kimberlite melts.

Carbonatite

Peridotite

Metasomatism

Magnesite

Silicic

Phlogopite

10.3390/min12040466

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Citations (2)

Composition of a carbonatitic melt in equilibrium with lherzolite at 5.5–6.3 GPa and 1350°C

Doklady Earth Sciences (2016)

Alexey N. Kruk Alexander G. Sokol Dmitry A. Chebotarev Yu. A. Palyanov N. V. Sobolev

Carbonatite

Peridotite

10.1134/s1028334x16030181

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Citations (5)

Conditions of kimberlite magma generation: experimental constraints

Russian Geology and Geophysics (2015)

Alexander G. Sokol Alexey N. Kruk

Liquidus

Saturation (graph theory)

10.1016/j.rgg.2015.01.018

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Citations (15)

Degassing Mechanisms of Kimberlite Magma at Its Initial Ascent: Experimental Data at 5.5 and 3.0 GPa

Geochemistry International (2022)

Alexey N. Kruk Alexander G. Sokol

10.1134/s0016702922110064

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The composition of garnet as an indicator of the conditions of peridotite-carbonatite interaction in the subcratonic lithosphere (experimental data)

Doklady Earth Sciences (2015)

Alexander G. Sokol Alexey N. Kruk Dmitry A. Chebotarev Yuri N. Palyanov N. V. Sobolev

Peridotite

Carbonatite

10.1134/s1028334x15070223

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Citations (3)

Formation of Spessartine and CO2 via Rhodochrosite Decarbonation along a Hot Subduction P-T Path

Minerals (2020)

Yuliya V. Bataleva Alexey N. Kruk Ivan D. Novoselov Yuri N. Palyanov

Experimental simulation of rhodochrosite-involving decarbonation reactions resulting in the formation of spessartine and CO2-fluid was performed in a wide range of pressures (P) and temperatures (T) corresponding to a hot subduction P-T path. Experiments were carried out using a multi-anvil high-pressure apparatus of a “split-sphere” type (BARS) in an MnCO3–SiO2–Al2O3 system (3.0–7.5 GPa, 850–1250 °C and 40–100 h.) with a specially designed high-pressure hematite buffered cell. It was experimentally demonstrated that decarbonation in the MnCO3–SiO2–Al2O3 system occurred at 870 ± 20 °C (3.0 GPa), 1070 ± 20 °C (6.3 GPa), and 1170 ± 20 °C (7.5 GPa). Main Raman spectroscopic modes of the synthesized spessartine were 349–350 (R), 552(υ2), and 906–907 (υ1) cm−1. As evidenced by mass spectrometry (IRMS) analysis, the fluid composition corresponded to pure CO2. It has been experimentally shown that rhodochrosite consumption to form spessartine + CO2 can occur at conditions close to those of a hot subduction P-T path but are 300–350 °C lower than pyrope + CO2 formation parameters at constant pressures. We suppose that the presence of rhodocrosite in the subducting slab, even as solid solution with Mg,Ca-carbonates, would result in a decrease of the decarbonation temperatures. Rhodochrosite decarbonation is an important reaction to explain the relationship between Mn-rich garnets and diamonds with subduction/crustal isotopic signature.

Grossular

Rhodochrosite

Pyrope

Slab

10.3390/min10080703

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Citations (4)

Conditions of carbonation and wehrlitization of lithospheric peridotite upon interaction with carbonatitic melts

Doklady Earth Sciences (2015)

Alexander G. Sokol Alexey N. Kruk Dmitry A. Chebotarev Yuri N. Palyanov N. V. Sobolev

Carbonatite

Peridotite