Search Results - "Bortnikov, N. S"

The Dimensional Effect and Crystal Morphological Peculiarities of Gibbsite in a Bauxite-Bearing Weathering Crust by Boeva, N. M., Bortnikov, N. S.

“…The correlation between the crystal morphological peculiarities of gibbsite and its position in a bauxite-bearing weathering profile is revealed from the…”
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Banded and Rhythmically Zoned Carbonate Veins of the Ag–Pb–Zn Prognoz Depozit (Sakha–Yakutia, Russia): A Result of Self-Organizing Processes by Anikina, E. Yu, Bortnikov, N. S.

“…Banded and rhythmically zoned textures are common within carbonate–sulfide–sulfosalts veins in the Ag–Pb–Zn Prognoz deposit. This pattern is characterized by a…”
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Paleocene Glauconite of the Near-Volga Monocline of Submarine Volcanic Sedimentary Genesis by Nikulin, Iv. Iv, Boeva, N. M., Soboleva, S. V., Bortnikov, N. S.

“…A new concept of the formation of glauconite from the Paleocene deposits of the sedimentary cover of the southwestern part of the Near-Volga monocline is…”
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The Role of Hydrocarbons in the Formation of Epithermal Gold–Silver Deposits in Kamchatka, Russia by Tolstykh, N. D., Bortnikov, N. S., Shapovalova, M. O., Shaparenko, E. O.

“…Data on the mineralogical and geochemical features of three epithermal gold deposits in Kamchatka, as well as on the compositions and physicochemical…”
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Caryochroite, a Rare Mineral from the Titanosilicate Group: Crystal Structure, Crystal Chemistry, and Thermal Properties by Soboleva, S. V., Boeva, N. M., Kartashov, P. M., Bortnikov, N. S.

“…The crystal structure of the rare mineral caryochroite is determined for the first time using X-ray diffractometry and electron microdiffraction data. The new…”
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Long Evolution of a Magmatic–Ore System of the Muruntau Gold Deposit, Western Uzbekistan, Tien Shan: Evidence from the LA–ICP–MS U–Pb Isotopic Age of Zircon from Granitoids of the Sardara (Sarykty) Pluton by Soloviev, S. G., Kryazhev, S. G., Semenova, D. V., Kalinin, Yu. A., Bortnikov, N. S.

“…The LA–ICP–MS U–Pb age was determined for the first time for zircon from granodiorites–granites of the Sardara (Sarykty) intrusive in area of the giant…”
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Sources of Substance and Genetic Relation of Soil and Bauxite-Bearing Horizons in the Laterite Profile of the Weathering Crust (of the Fouta Jallon–Mandingo Province, Republic of Guinea) by Makarova, M. A., Shipilova, E. S., Boeva, N. M., Vnuchkov, D. A., Bortnikov, N. S.

“…For the first time, a granulometric analysis of lateritic soils was carried out and the sources of the substance involved in the formation of the degradation…”
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To a Question of Sulfur Sites in Crystal Structures of Tetrahedrite Group Minerals: Relationships between Occupancy, Effective Ion Sizes, and Unit Cell Parameters by Lyubimtseva, N. G., Marchenko, E. I., Eremin, N. N., Bortnikov, N. S.

“…In this work, a crystal chemical analysis of the known experimentally deciphered crystal structures of tetrahedrite group minerals was carried out in order to…”
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The World’s Largest Bauxite-Bearing Province, Fouta Djallon–Mandingo (West Africa). Part 4: a Zoning Mechanism in Laterite Bauxite-Bearing Weathering Crust by Makarova, M. A., Mamedov, V. I., Boeva, N. M., Shipilova, E. S., Vnuchkov, D. A., Bortnikov, N. S.

“…The results of detailed exploration and year-round observations of the hydrogeological regime at large deposits, as well as special hydrochemical studies of…”
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A New Model of the Behavior of Sulfur Isotopes in Modern Submarine Hydrothermal Systems by Dubinina, E. O., Bortnikov, N. S.

“…A model of the behavior of sulfur isotopes in modern hydrothermal isotope systems is suggested. It is accepted that the thermogenic sulfate reduction in the…”
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Structural Position and Typification of Alteration Zones, Polar Urals: First Experience of Modern Space Sensing of the Earth by Vikentyev, I. V., Ivanova, Yu. N., Nafigin, I. O., Bortnikov, N. S.

“…A new approach to statistical analysis of the data from the Landsat 8 spacecraft was developed for the first time for the territory of the Urals on the basis…”
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Physicochemical Conditions of Formation of Productive Mineral Assemblages of Gold Deposits in the Taimyr–Severnaya Zemlya Orogen by Borovikov, A. A., Proskurnin, V. F., Palyanova, G. A., Petrov, O. V., Bortnikov, N. S.

“…The PTX parameters of the formation of gold mineralization in the Taimyr–Severnaya Zemlya orogen were established for the first time based on data from studies…”
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Evidence for Granitoid Magmatism and the Composition of the Silicic Melt in the Gabbroid Assemblage of the Mid-Atlantic Ridge at 13° N: New Data on Melt Inclusions by Sholukhov, K. N., Prokofiev, V. Yu, Solovova, I. P., Pertsev, A. N., Aranovich, L. Ya, Borisovsky, S. E., Bortnikov, N. S.

“…Despite the local occurrence of silicic magmatism during the formation of the oceanic crust, the nature of felsic granitoid veins (“oceanic plagiogranite”)…”
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LA–ICP–MS Isotopic U–Pb Age of Zircon from the Eldzhurty Granites and Rhyolites at the Tyrnyauz Mo–W Deposit (North Caucasus, Russia) by Soloviev, S. G., Kryazhev, S. G., Semenova, D. V., Kalinin, Y. A., Bortnikov, N. S.

“…The isotopic U–Pb ages are estimated for zircons (for the first time by the LA–ICP–MS method) from biotite (Eldzhurty) granites and for the first time from the…”
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The Main Processes and Stages in the Formation of the Unique Sangaredi Deposit of Bauxites (West Africa) by Mamedov, V. I., Makarova, M. A., Boeva, N. M., Slukin, A. D., Shipilova, E. S., Bortnikov, N. S.

“…In the course of additional exploration of the lower horizons of the unique Sangaredi deposit in West Africa, nonlaterized deposits of the Sangaredi series of…”
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Rare Arsenates of REEs and Y in Ores of the Verkhnee Greisen Deposit within the Khingan–Olonoiskii District (Primorye, Russia) by Gorelikova, N. V., Korostelev, P. G., Semenyak, B. I., Gonevchuk, V. G., Taskaev, V. I., Rassulov, V. A., Bortnikov, N. S.

“…In the Sn–W greisen deposits of the Karadub ore field, rare arsenates of REEs chernovite-(Y) and gasparite-(Ce), associated with topaz, fluorite, fluocerite,…”
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Synthetic Gold Chalcogenides in the Au–Te–Se–S System and Their Natural Analogs by Palyanova, G. A., Tolstykh, N. D., Zinina, V. Yu, Kokh, K. A., Seryotkin, Yu. V., Bortnikov, N. S.

“…Quaternary chalcogenides of AuX (AuTe 0.7 Se 0.2 S 0.1 ), Au 3 X 10 (Au 3 Te 6 Se 3 S, Au 3 Te 6 Se 2.5 S 1.5 ), and AuX 2 (AuTe 1.8 Se 0.2 , AuTe 1.8 Se 0.1 S…”
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Biogenic Dissolution of Quartz during Formation of Laterite Bauxites (According to the Results of Electron Microscopic Study) by Slukin, A. D., Boeva, N. M., Zhegallo, E. A., Bortnikov, N. S.

“…For the first time, a systematic electron microscope study of the complete weathering of quartz in lateritic bauxites formed on khondalites and alluvial…”
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Ferriplantites in the Bauxite-Bearing Lateritic Weathering Rocks (Futa Jallon-Mandingo Province, Africa): The Key Factors for Iron Accumulation by Mamedov, V. I., Shipilova, E. S., Boeva, N. M., Slukin, A. D., Makarova, M. A., Vnuchkov, D. A., Bortnikov, N. S.

“…Investigation of the comprehensive geological material on the lateritic weathering rocks (Futa Jallon-Mandingo, Africa) led to original identification of a…”
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Organic Complexes in the Montmorillonite Interlayer Space: A Unique Feature of Sakhalin Island Bentonite by Bortnikov, N. S., Boeva, N. M., Soboleva, S. V., Bocharnikova, Yu. I.

“…Montmorillonite of natural modification with organic complexes was found for the first time in bentonite of the Tikhmenevo deposit on Sakhalin Island. The data…”
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