Article
Geochemistry & Geophysics
Hongli Zhu, Dmitri A. Ionov, Long Du, Zhaofeng Zhang, Weidong Sun
Summary: Light rare earth element enrichments in mantle peridotites without enrichments in high-field-strength elements are commonly attributed to inputs from carbonate-rich melts known as 'carbonatite' metasomatism. This study compared models of silicate and carbonatite metasomatism in peridotites and found distinct chemical signatures between the two, with carbonatite metasomatism potentially yielding the lowest Ca-isotope values. High Sr content and Sr-87/Sr-86 ratios may serve as indicators of carbonatite metasomatism in mantle rocks.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Simon Turner, Michael Turner, Bernard Bourdon, Kari Cooper, Don Porcelli
Summary: The research reveals large U-Th-Ra disequilibria in very young lavas from mantle xenoliths, indicating ongoing infiltration of carbonatitic melts/fluids and crystallization of pargasite may explain the U-series disequilibria observations. Despite unclear details, the nuclides' half-lives suggest the disturbance is extremely young, potentially impacting the crust significantly.
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2021)
Article
Geochemistry & Geophysics
Anton Shatskiy, Ivan V. Podborodnikov, Anton V. Arefiev, Altyna Bekhtenova, Yulia G. Vinogradova, Konstantin M. Stepanov, Konstantin D. Litasov
Summary: The study found that the reactions between pyroxenes and carbonates vary under different pressure and temperature conditions, with the solidus loci primarily influenced by temperature and pressure.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2021)
Article
Geology
Keith Priestley, Tak Ho, Dan McKenzie
Summary: New evidence from seismic tomography indicates a unique mineral fabric in the thick mantle lithosphere beneath ancient continental cratons, shedding light on the formation of these structures. This mineral fabric, revealed through surface-wave tomography, suggests a vertical alignment of olivine crystals at depths of -150 km within cratonic continental-lithosphere roots, likely a remnant from craton formation. Geochemical and petrological studies further support the stability of cratonic mantle roots due to reduced density caused by melt removal at shallower depths. This seismological fabric at -150 km provides evidence of the shortening event that created the cratonic roots.
Article
Geochemistry & Geophysics
Anton Shatskiy, Ivan V. V. Podborodnikov, Anton V. V. Arefiev, Konstantin D. D. Litasov
Summary: Inclusions in mantle minerals and xenoliths from kimberlites derived from deep depths showed great variations in composition. The stability range of these inclusions remains unclear. New experimental data on the KCl-CaCO3-MgCO3 system obtained at 3 GPa show the eutectic type of phase relations. The melting reactions of KCl-bearing carbonated eclogite at different pressures and depths are also identified.
Article
Geochemistry & Geophysics
Anton Shatskiy, Altyna Bekhtenova, Ivan Podborodnikov, Anton V. Areflev, Konstantin D. Litasov
Summary: The study reveals that potassium-rich carbonatite melts can maintain thermodynamic equilibrium with different types of olivine at high pressure and high temperature. Melts with Ca# < 30 result in wehrlitization, melts with Ca# ranging from 30 to 34 cause harzburgitization, and melts with Ca# > 34 induce wehrlitization. At a depth of about 200 km in the subcontinental lithospheric mantle, high-Mg sodium-rich dolomitic carbonatite melts are the only carbonate melts that can thermodynamically stable with garnet lherzolites.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Tianze Liu, Emily J. Chin, Peter Shearer
Summary: This study reveals that mantle metasomatism is likely an important cause of mid-lithosphere discontinuities worldwide, which is significant for understanding the structure and evolution of cratonic lithospheres.
Article
Geochemistry & Geophysics
Aleksei Kruk, Alexander Sokol
Summary: Studying the mechanisms of carbonatitic melt evolution is crucial for understanding metasomatic processes in the continental lithospheric mantle. Experimental studies have shown that the interaction between garnet lherzolite and a water-bearing carbonatitic melt leads to decarbonation of lherzolite and carbonation of olivine and clinopyroxene. This results in the formation of carbonate-silicate melts and highlights the importance of CO2 and water in the evolution of metasomatic agents.
Letter
Geosciences, Multidisciplinary
Ryan Porter, Mary Reid
Summary: The thermal regime of the continental lithosphere in North America was evaluated using seismic observations and lab results to estimate temperatures and lithospheric thickness, as well as predict melt distribution in the upper mantle. Results indicate thinner lithosphere and presence of melt in the western US, while thicker lithosphere with absence of melt is observed in the central and eastern US.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Anton Shatskiy, Ivan V. Podborodnikov, Anton V. Arefiev, Altyna Bekhtenova, Konstantin D. Litasov
Summary: This study investigates the phase relationships in the KCl-CaCO3-MgCO3 system and reveals the ability of chlorides and carbonates to survive and form melts in the deep mantle.
Article
Geosciences, Multidisciplinary
Anton Shatskiy, Ivan Podborodnikov, Anton Arefiev, Altyna Bekhtenova, Konstantin D. Litasov
Summary: Studies suggest that chlorides are significant components of mantle carbonatite melts and saline high-density fluids, and there may be a genetic relationship between them. Research on the subsolidus and melting phase relations in the chloride-carbonate system provides insights into the low-temperature derivative of mantle carbonatite melts in the form of hydrous saline melts/fluids.
GEOSCIENCE FRONTIERS
(2022)
Article
Geosciences, Multidisciplinary
Stephen F. Foley, Isra S. Ezad, Sieger R. van der Laan, Maik Pertermann
Summary: Experiments on ultramafic rocks rich in hydrous minerals show that low CaO and Al2O3 in igneous rocks is not necessarily a sign of a depleted peridotite source. Addition of accessory phases can result in melting at lower temperatures.
GEOSCIENCE FRONTIERS
(2022)
Review
Geosciences, Multidisciplinary
Anastassia Y. Borisova, Romain Tilhac
Summary: The study provides evidence supporting the role of carbon-rich or carbonatitic melts as metasomatizing agents in the Earth's mantle, particularly in hot-spot settings like the rejuvenated Hawaiian lavas. The high volatile element content in the rejuvenated-stage alkaline lavas suggests a source fluxed by carbonatitic melts, leading to compositional variability in oceanic island magmas.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
N. S. Martirosyan, A. Shatskiy, K. D. Litasov, I. S. Sharygin, T. Yoshino
Summary: This study investigates the interaction between carbonates and iron-rich peridotites in the reduced mantle, resulting in the formation of diamonds or other reduced carbon species. Experimental results showed the occurrence of redox reactions and the formation of carbonate melt and oxides. Kinetic calculations suggest that redox reactions are limited due to slow chemical diffusion rates in silicate media, while the presence of carbonate melt leads to significant consumption of carbonates.
Article
Multidisciplinary Sciences
Simon L. Klemperer, Ping Zhao, Colin J. Whyte, Thomas H. Darrah, Laura J. Crossey, Karl E. Karlstrom, Tianze Liu, Carmen Winn, David R. Hilton, Lin Ding
Summary: This study uses helium isotope data to reveal the geometry between the crustal plate and mantle in the continental collision of the Himalaya and Tibetan Plateau, answering the question of whether the crustal plate underplates or subducts into the mantle. The results show that the crustal plate underplates and comes into contact with the mantle at greater depths. The study also identifies a helium isotope boundary between the Indian crust and the Tibetan Plateau, which helps explain conflicting seismic interpretations.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geosciences, Multidisciplinary
Anton Shatskiy, Altyna Bekhtenova, Anton Arefiev, Ivan Podborodnikov, Yulia G. Vinogradova, Dmitriy Rezvukhin, Konstantin D. Litasov
Summary: The study found that the infiltration of water-rich carbonate melts into the mantle rocks can lead to the consumption of minerals like garnet and orthopyroxene, producing new minerals like phlogopite and K-richterite. This metasomatic process may weaken the lithosphere and promote the formation of continental rifts.
Article
Geochemistry & Geophysics
A. Shatskiy, A. Bekhtenova, A. Arefiev, I. Podborodnikov, K. D. Litasov
Summary: Partial melting of carbonated metapelites at depth can produce two immiscible melts, which are similar to melt inclusions in diamonds. These melts react with garnet lherzolite, resulting in the formation of different minerals. These findings can help interpret the origins and mantle lithological characteristics of melt inclusions in diamonds.
Article
Physics, Multidisciplinary
Ivan Podborodnikov, Anton Shatskiy, Anton Arefiev, Altyna Bekhtenova, Konstantin D. Litasov
Summary: Continuous variations in the composition of melt inclusions in diamonds suggest their possible genetic relationship and provide interest in the study of chloride-carbonate systems at high pressure. Experimental data show that the KCl-CaCO3 and KCl-MgCO3 systems have eutectic characteristics.
HIGH PRESSURE RESEARCH
(2022)
Article
Spectroscopy
Sergey Rashchenko, Anastasia Mikhno, Anton Shatskiy
Summary: This study characterizes the structure and stability of Na-Ca carbonates synthesized under high pressures, particularly in the mantle transition zone. The results demonstrate that Na-Ca burbankite remains structurally stable at pressures up to 24 GPa, suggesting its potential presence in the deep mantle.
JOURNAL OF RAMAN SPECTROSCOPY
(2023)
Article
Multidisciplinary Sciences
Nursultan E. Sagatov, Dinara N. Sagatova, Pavel N. Gavryushkin, Konstantin D. Litasov
Summary: Based on density functional theory and crystal structure prediction, we discovered a novel high-pressure structure of Fe2CO4-P(1) over bar. It contains ethane-like O3C-CO3 groups or orthooxalate groups, which were previously proposed in melts and aqueous carbonate solutions but not in inorganic crystalline materials. This structure is dynamically and thermally stable at pressures of 50 GPa and similar structures were also predicted for Mn2CO4, Ni2CO4, and Co2CO4. FeCO3 was found to transform into a similar structure at pressures above 275 GPa. Additionally, we observed the self-diffusion of metal atoms in carbonates at high pressure and high temperatures for the first time. The prediction of novel carbonate structures expands the crystal chemistry of inorganic carbonates beyond the known structures with [CO3] triangles, [C2O5] pyro-groups, and [CO4] tetrahedra.
Article
Geosciences, Multidisciplinary
Anton Shatskiy, Anton V. Arefiev, Konstantin D. Litasov
Summary: The study investigates the reaction kinetics and properties of mantle carbonates with iron metal, revealing the reduction, evolution, and preservation of carbonates in the mantle. This has significant implications for understanding diamond formation and mantle material cycling.
GEOSCIENCE FRONTIERS
(2023)
Article
Geochemistry & Geophysics
Anton Shatskiy, Ivan V. Podborodnikov, Anastasia S. Fedoraeva, Anton Arefiev, Altyna Bekhtenova, Konstantin D. Litasov
Summary: The phase relations in the NaCl-CaCO3 and NaCl-MgCO3 systems were experimentally studied using a multi-anvil press at 6 GPa and temperatures ranging from 1000 to 1600 degrees C. Both systems were found to have eutectic type phase diagrams, with subsolidus assemblages of halite + aragonite and halite + magnesite. The composition of the halite-aragonite eutectic was determined to be 40 wt% NaCl and 60 wt% CaCO3 at temperatures below 1200 degrees C, while the halite-magnesite eutectic had a composition of 72 wt% NaCl and 28 wt% MgCO3 at 1300 degrees C. Complete miscibility between carbonate and chloride liquids was observed up to 1600 degrees C.
AMERICAN MINERALOGIST
(2023)
Article
Geochemistry & Geophysics
Anton Shatskiy, Yulia G. Vinogradova, Anton V. Arefiev, Konstantin D. Litasov
Summary: In this study, the phase relationships in the NaAlSi2O6-CaMgSi2O6-CO2 system were investigated at pressures of 3-6.5 GPa and temperatures of 900-1500°C using a multianvil press. The experiments lasted for 5 to 9 days, and equilibrium was examined using oxide-carbonate mixtures and diopside-jadeite glasses. The results revealed that the subsolidus assemblage consists of clinopyroxene, coesite, dolomite, and CO2 fluid. Under certain P-T conditions, clinopyroxene can be in equilibrium with CO2 fluid, leading to partial carbonation and the formation of a low-Mg carbonate melt with moderate sodium concentrations.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2023)
Article
Geochemistry & Geophysics
Anton V. V. Arefiev, Anton Shatskiy, Altyna Bekhtenova, Konstantin D. D. Litasov
Summary: Liquid immiscibility is significant in the formation of carbonatites and alkaline Si-undersaturated magmas. The miscibility gap between carbonate and silicate is determined by pressure and differs between sodium carbonate-aluminosilicate and potassium-rich carbonate-aluminosilicate systems. This study investigates the immiscibility range under intermediate pressures and finds that the compositions of immiscible phonolite and carbonatite melts change with pressure, indicating different depth and mantle conditions.
Article
Geochemistry & Geophysics
Anton Shatskiy, Ivan V. V. Podborodnikov, Anton V. V. Arefiev, Konstantin D. D. Litasov
Summary: Inclusions in mantle minerals and xenoliths from kimberlites derived from deep depths showed great variations in composition. The stability range of these inclusions remains unclear. New experimental data on the KCl-CaCO3-MgCO3 system obtained at 3 GPa show the eutectic type of phase relations. The melting reactions of KCl-bearing carbonated eclogite at different pressures and depths are also identified.
Article
Geochemistry & Geophysics
Zhen-Min Ge, Xiao-Long Huang, Wei Xie, Tobias W. Hofig, Fan Yang, Yang Yu, S. Khogenkumar Singh
Summary: The mantle source composition of the nascent oceanic crust in the central part of the Gulf of California has been investigated using basaltic glass samples. These samples show trace element patterns similar to enriched mid-ocean ridge basalts, suggesting that the nascent oceanic crust in the Guaymas Basin might be generated through partial melting of a depleted mantle source metasomatized by subducted slab materials.
Article
Geochemistry & Geophysics
Jean-Michel Brazier, Katja E. Goetschl, Martin Dietzel, Vasileios Mavromatis
Summary: This study estimated the distribution coefficient of Zn2+ between calcite/aragonite and reactive fluids and found that the growth rate strongly influences D-Zn(2+) in both minerals. Additionally, a linear correlation was found between D-Zn(2+) and the saturation degree of the reactive fluid.
Article
Geochemistry & Geophysics
Ming Lei, Michele Lustrino, Jifeng Xu, Zhiqiang Kang, Zhengfu Guo, Jianlin Chen
Summary: This study presents a comprehensive geochronological, mineralogical, and geochemical analysis of olivine leucitites in the Maiga area of southern Tibet, suggesting that these rocks originate from a carbonated peridotite mantle source and highlighting the possibility of carbonates being recycled deep into the mantle during continental subduction.
Article
Geochemistry & Geophysics
Yuntao Ye, Xiaomei Wang, Huajian Wang, Haifeng Fan, Zhigang Chen, Qingjun Guo, Ziteng Wang, Chaodong Wu, Donald E. Canfield, Shuichang Zhang
Summary: Phosphorus is an essential element for life and its cycle in the ocean is closely connected with the carbon and oxygen cycles. The study of phosphate oxygen isotopes can provide insights into various reactions related to phosphorus. By analyzing carbonate fluorapatite samples from the Mesoproterozoic Era in North China, it was found that the oxygen isotope values were lower compared to modern samples, indicating a warmer climate during that time period and a potential reason for the scarcity of phosphorite.
Article
Geochemistry & Geophysics
Vincent Busigny, Oanez Lebeau, Didier Jezeduel, Carine Chaduteau, Sean Crowe, Magali Ader
Summary: This study conducted high-precision Mo isotope research on hydrothermal metal sulfides from a porphyry copper deposit in Southwest China and found that different stages of mineralization have distinct Mo isotope compositions, providing valuable insights into the behavior of Mo isotopes in magmatic-hydrothermal systems.
Article
Geochemistry & Geophysics
Min Ji, Xiao-Ying Gao, Yong-Fei Zheng, Bing Gong
Summary: The study examines the anatectic mechanisms in the Himalayan orogen, finding that pressure and temperature control the reaction, while water content mainly affects the solid-phase composition. Dehydration and hydration melting likely occur at different depths in the crust. This research provides important insights into the melting processes in collisional orogens.
