Shatsky, V. S. Ragozin, A. L. Sitnikova, E. S.
Published in
Doklady Earth Sciences
AbstractSignificant variations in the composition of garnets, both within individual grains and in the rock, are found in the xenolith of deformed garnet lherzolite from the Udachnaya kimberlite pipe. The central parts of the grains, corresponding in composition to the garnets of the lherzolite paragenesis, demonstrate a sinusoidal distribution of ...
Filippova, A. I. Solovey, O. A.
Published in
Izvestiya, Atmospheric and Oceanic Physics
AbstractA study of the deep structure of the Earth’s crust and the upper mantle beneath Southeast Asia is presented from surface wave tomography data. A representative sample of dispersion curves of group velocities of Rayleigh (6522 seismic paths) and Love (4489 seismic paths) waves is compiled by frequency–time analysis in the range of periods of...
Vinnik, L. P. Georgieva, G. D. Oreshin, S. I. Makeyeva, L. I. Dragomirov, D. N. Buchakchiev, V. D. Dimitrova, L. D.
Published in
Izvestiya, Physics of the Solid Earth
Abstract—Analysis of P- and S-receiver functions for 19 seismic stations on the Balkan Peninsula has been performed. Half of the stations are in Bulgaria. The crustal thickness varies from 28–30 to 50 km. The ratio of longitudinal and shear wave velocities in the upper crust reaches 2.0 in some places. In the southwest of the study area, the 410-km...
Savchuk, Yu. S. Volkov, A. V. Galyamov, A. L.
Published in
Journal of Volcanology and Seismology
AbstractThe Peruvian part of the Andean volcanic belt (AVB) is characterized by significant mineralization. There are explored Au-Ag epithermal, Cu-porphyry, skarn, Fe-oxide (IOCG-type) and polymetallic deposits. The metallogeny of the AVB is determined by the subduction process, i.e., the underthrusting of the Nazca oceanic plate under the margin ...
Kaplun, V. B. Bronnikov, A. K.
Published in
Russian Journal of Pacific Geology
AbstractBased on the results of MT soundings carried out along the profile crossing the Khanka Massif from north to south, the geoelectric section of the lithosphere was constructed down to a depth of 150 km. The crust and upper mantle structure of the massif was explored. It has been found that the Khanka Massif is divided into the northern and so...
Ritter, Xenia Guillot, Bertrand Sator, Nicolas Desmaele, Elsa Massuyeau, Malcolm Sanchez-Valle, Carmen
Published in
Frontiers in Earth Science
The viscosity of carbonate melts is a fundamental parameter to constrain their migration and ascent rates through the mantle and ultimately, their role as carbon conveyors within the deep carbon cycle. Yet, data on the viscosity of carbonate melts have remained scarce due to experimental limitations and the lack of appropriate theoretical descripti...
Vinogradova, Y. G. Shatskiy, A. F. Litasov, K. D.
Published in
Geochemistry International
Abstract—Diamond-hosted inclusions provide information on the composition of the upper mantle. Many researchers found molecular CO2 inclusions, along with mineral and melt ones, in diamonds. Available experimental data on simplified systems suggest that CO2 fluid cannot occur in equilibrium with rock-forming mantle minerals. However, it was suggest...
Petrishchevsky, A. M.
Published in
Russian Journal of Pacific Geology
AbstractSpatial distributions of the gravity inhomogeneities and their comparative rheological parameters estimated from the density contrast of the crust and upper mantle of northeastern China are analyzed. The features of rheological layering of the tectonosphere and deep spatial relationships between tectonic structures (cratonic blocks, margina...
Goev, A. G. Sanina, I. A. Oreshin, S. I. Reznichenko, R. A. Tarasov, S. A. Fedorov, A. V.
Published in
Izvestiya, Physics of the Solid Earth
Abstract—The velocity structure of the lithosphere is studied beneath the Khibiny and Lovozero massifs in the northeastern part of the Baltic shield. The massifs belong to the world’s eight largest alkaline intrusions and are widely known for their unique mineralogy. The crustal and upper-mantle velocity structure beneath these two rock blocks is r...
Butvina, V. G. Safonov, O. G. Vorobey, S. S. Limanov, E. V. Kosova, S. A. Van, K. V. Bondarenko, G. V. Garanin, V. K.
Published in
Geochemistry International
Abstract—The paper summarizes authors' earlier and newly obtained experimental data on the formation of phlogopite and chromium-bearing potassium titanates of the crichtonite, magnetoplumbite, and hollandite groups, which are indicator minerals that characterize various stages of modal metasomatism in the upper mantle. Phlogopite-forming reactions ...
