Dmitry Bondar
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View article: Chemically Driven Nano‐Elastic Heterogeneities Control Fragility in Volcanic Melts
Chemically Driven Nano‐Elastic Heterogeneities Control Fragility in Volcanic Melts Open
Here, the nanoscale structural drivers of the mechanical behavior of volcanic glasses are explored. The study spans a compositional series ranging from basalt to rhyolite, encompassing also technical glass‐forming melts. Using a granular‐m…
View article: Phase Relations in the MgSiO <sub>3</sub> System Associated With Hot Mantle Upwelling Across the 660 km Depth
Phase Relations in the MgSiO <sub>3</sub> System Associated With Hot Mantle Upwelling Across the 660 km Depth Open
The phase transformations of MgSiO 3 bridgmanite control the structure, dynamics and chemistry of the Earth's mantle. Formation of bridgmanite occurs at a depth of about 660 km causing the strong and abrupt seismic discontinuity. Previous …
View article: Impact of Cooling Rate on Rheology and Emplacement Dynamics of Basaltic Lava Flows: Insights from the 2023-2024 Sundhn&#250;ksg&#237;gar Eruption (Iceland)
Impact of Cooling Rate on Rheology and Emplacement Dynamics of Basaltic Lava Flows: Insights from the 2023-2024 Sundhnúksgígar Eruption (Iceland) Open
The 2023-2024 eruptions at Sundhnúksgígar in Iceland produced tholeiitic basaltic lavas that traveled at high velocities, affecting vast areas. In this context, disequilibrium crystallization can play a fundamental role in modula…
View article: A review of the differential scanning calorimetry shift–factor approach: Application to Colli Albani melt viscosity and implications for mafic Plinian eruptions
A review of the differential scanning calorimetry shift–factor approach: Application to Colli Albani melt viscosity and implications for mafic Plinian eruptions Open
The differential scanning calorimetry (DSC) shift factor has recently been applied to model the viscosity of volcanic melts, revealing that such melts are often less viscous and more prone to nanoscale phase separation and crystallization …
View article: Nanolite Crystallization in Volcanic Glasses: Insights From High‐Temperature Raman Spectroscopy and Low‐Temperature Rock‐Magnetic Analysis
Nanolite Crystallization in Volcanic Glasses: Insights From High‐Temperature Raman Spectroscopy and Low‐Temperature Rock‐Magnetic Analysis Open
High‐temperature Raman spectroscopy offers a cost‐effective alternative to extensive infrastructure and sensitive instrumentation for investigating nanolite crystallization in undercooled volcanic melts, a key area of interest in volcanolo…
View article: In situ nanoscale insights on magma viscosity and explosive eruptions
In situ nanoscale insights on magma viscosity and explosive eruptions Open
Explosive volcanic eruptions pose significant threats to populated areas by injecting substantial amounts of gas and ash into the atmosphere. These events, resulting from magma fragmentation, are triggered by factors such as limited bubble…
View article: Nanoscale chemical heterogeneities control magma viscosity and failure
Nanoscale chemical heterogeneities control magma viscosity and failure Open
Explosive volcanic eruptions, resulting from magma fragmentation, pose significant threats to inhabited regions. The challenge of achieving fragmentation conditions in less evolved compositions, such as andesites and basalts, stems from th…
View article: Viscosity of anhydrous and hydrous peridotite melts
Viscosity of anhydrous and hydrous peridotite melts Open
The melt viscosity (η) of anhydrous and hydrous peridotite was investigated using a multipronged approach combining micropenetration viscometry, conventional DSC, flash DSC and Brillouin spectroscopy. Raman spectroscopy measurements were u…
View article: Depressed 660-km seismic discontinuity beneath cold subduction zones caused by akimotoite-bridgmanite phase transition
Depressed 660-km seismic discontinuity beneath cold subduction zones caused by akimotoite-bridgmanite phase transition Open
<p>The 660-km seismic discontinuity (D660) is the boundary between the Earth&#8217;s lower mantle and transition zone and is commonly interpreted as the dissociation of (Mg,Fe)<sub>2</sub>SiO<sub>4</sub> r…
View article: Depressed 660-km discontinuity caused by akimotoite–bridgmanite transition
Depressed 660-km discontinuity caused by akimotoite–bridgmanite transition Open
The 660-kilometre seismic discontinuity is the boundary between the Earth’s lower mantle and transition zone and is commonly interpreted as being due to the dissociation of ringwoodite to bridgmanite plus ferropericlase (post-spinel transi…
View article: Accepted manuscript of "Simultaneous generation of ultrahigh pressure and temperature to 50 GPa and 3300 K in multi-anvil apparatus" by Xie et al. [Rev. Sci. Instr., 92, 103902, 2021]
Accepted manuscript of "Simultaneous generation of ultrahigh pressure and temperature to 50 GPa and 3300 K in multi-anvil apparatus" by Xie et al. [Rev. Sci. Instr., 92, 103902, 2021] Open
Accepted manuscript of Xie, L., Chanyshev, A., Ishii, T., Bondar, D., Nishida, K., Chen, Z., Bhat, S., Farla, R., Higo, Y., Tange, Y., Su, X., Yan, B., Ma, S., Katsura, T., Simultaneous generation of ultrahigh pressure and temperature to 5…
View article: Supporting dataset for paper"Simultaneous generation of ultrahigh pressure and temperature to 50 GPa and 3300 K in multi-anvil apparatus "
Supporting dataset for paper"Simultaneous generation of ultrahigh pressure and temperature to 50 GPa and 3300 K in multi-anvil apparatus " Open
Supporting dataset for paper"Simultaneous generation of ultrahigh pressure and temperature to 50 GPa and 3300 K in multi-anvil apparatus "
View article: Supporting dataset for paper"Simultaneous generation of ultrahigh pressure and temperature to 50 GPa and 3300 K in multi-anvil apparatus "
Supporting dataset for paper"Simultaneous generation of ultrahigh pressure and temperature to 50 GPa and 3300 K in multi-anvil apparatus " Open
Supporting dataset for paper"Simultaneous generation of ultrahigh pressure and temperature to 50 GPa and 3300 K in multi-anvil apparatus "
View article: Simultaneous generation of ultrahigh pressure and temperature to 50 GPa and 3300 K in multi-anvil apparatus
Simultaneous generation of ultrahigh pressure and temperature to 50 GPa and 3300 K in multi-anvil apparatus Open
We attempted to generate ultrahigh pressure and temperature simultaneously using a multi-anvil apparatus by combining the technologies of ultrahigh-pressure generation using sintered diamond (SD) anvils, which can reach 120 GPa, and ultrah…
View article: Determination of phase relations of the olivine–ahrensite transition in the Mg2SiO4–Fe2SiO4 system at 1740 K using modern multi-anvil techniques
Determination of phase relations of the olivine–ahrensite transition in the Mg2SiO4–Fe2SiO4 system at 1740 K using modern multi-anvil techniques Open
The phase relations of iron-rich olivine and its high-pressure polymorphs are important for planetary science and meteoritics because these minerals are the main constituents of terrestrial mantles and meteorites. The olivine–ahrensite bin…
View article: Stability and Solubility of the FeAlO<sub>3</sub> Component in Bridgmanite at Uppermost Lower Mantle Conditions
Stability and Solubility of the FeAlO<sub>3</sub> Component in Bridgmanite at Uppermost Lower Mantle Conditions Open
We report the stability and solubility of the FeAlO 3 component in bridgmanite based on phase relations in the system MgSiO 3 ‐FeAlO 3 at 27 GPa and 2000 K using a multi‐anvil apparatus combined with in situ synchrotron X‐ray diffraction m…
View article: Porphyry Cu(Mo) deposits of the Urals: insights from molybdenite trace element geochemistry
Porphyry Cu(Mo) deposits of the Urals: insights from molybdenite trace element geochemistry Open
The first data on EMPA and LA-ICPMS study of molybdenite from four porphyry deposits of the South and Middle Urals (Tomino, Mikheevskoe and Benkala porphyry Cu and Talitsa porphyry Mo deposits) are presented. It is shown that most trace el…