P. 4–18
ACADEMICIAN V.S. SOBOLEV – OUTSTANDING MINERALOGIST AND PETROLOGIST OF THE 20th CENTURY
(TO THE CENTENARY ANNIVERSARY)
Three periods (Leningrad, Lviv and Novosybirsk) of vital and creative way of prominent scientist and teacher of the XX century academician V. Sobolev are briefly analysed. It is marked his unsurpassed achievements in prognostication of diamond deposits, development of stumpers of silicates crystallochemistry, problems of metamorphism, in development of experimental researches and thermobarogeochemical methods of direct determination of PT-conditions of magmatic and metamorphic mineral forming, in cognition of upper mantle genesis.
Key words: Volodymyr Stepanovych Sobolev, crystallochemistry of silicates, problems of metamorphism, prognostication of diamond deposits, upper mantle.
P. 1 9–24
VOLODYMYR SOBOLEV ABOUT ISOMORPHISM OF SPECIAL KIND AND THE STATE OF ITS STUDY
The concept of isomorphism of special kind was found by V. Sobolev. In modern lit-erature it is named as domain, block, anomalous isomorphism, and in the phyllosilicates – mixed-layer intergrowths. The nature of isomorphism of special kind is considered; the examples of its distribution in minerals and the state of its study are described.
Key words: isomorphism of special kind, domain, block, anomalous isomorphism, mixed-layer minerals.
P. 25–34
THE ROLE OF ACADEMICIAN V. SOBOLEV IN PETROLOGIC INVESTIGATIONS OF THE CARPATHIANS
AND MODERN IDEAS OF MAGMATISM OF THE REGION
The paper presents the principal scientific achievements of academician V. Sobolev during the Lviv period of life (1945–1958). General scheme of the Carpathians Alpine magmatism evolution is given. Three phases of magmatism have been distinguished: ultrabasic, basic (Mesozoic), medium-acid (Cainozoic) and alkaline basaltoid (Pliocene–Pleistocene). On the basis of petrochemical features it was possible to determine types, differentiation degree of magmas, position of the source and corresponding geodynamic situation: passive rifting – collision – post collision – “hot points” in the continent.
Key words: magmatism, geodynamics, petrochemistry, pyroxenes, xenoliths, Carpathians.
P. 35–44
THE EARTH IMPACT DIAMONDS: FROM V. SOBOLEV TO PRESENT TIME
The role of V. Sobolev in scientific and organizational support of the first results in discovery and study of impact diamond as new results of this field investigation is given. The inadmissibility of interpretation of impact diamond as a kimberlitic one is empha-sized.
Key words: astroblem, endogenous diamond, impact diamond, lonsdaleite.
P. 45–53
MODERN INFORMATION ABOUT COMPOSITION AND NATURE OF PRESOLAR GRAINS IN METEORITES
Presolar grains are literally bits of stars in size from nano-up to micrometers which in small amount are present at primitive meteorites and interplanetary dust parts. This article is the overview of published data on mineral and isotopic compositions of presolar grains and their stellar sources. Besides, the astrophysical significance of results of their research is considered.
Key words: presolar minerals, isotopic correlations, meteorites, AGB- and RGB-stars, new and supernew stars.
P. 54–63
BA-RICH MICAS IN MAGNESIUM SKARNS FROM ZAVALLYA GRAPHITE DEPOSIT
K. Shakina, L. Skakun, N. Bilyk, B. Manchur
A new locality for the Ba-rich trioctahedral micas, kinoshitalite and ferrokinoshitalite, has been found in Zavallya graphite deposit. Kinoshitalite associates with enstatite and dolomite in enstatite skarns while ferrokinoshitalite – with ferrosilite and calcite in quartz-pyroxene rock in proximal zone of magnesian skarn. Phlogopite forms at retro-grade stage in association with clinochlore, calcite, quartz, magnetite, pyrrhotite and graphite. Ba-rich micas with respect to phlogopite are characterized by lower contents of MnO, K2O with no impurity of Na2O, TiO2, CoO and NiO. The main substitution mechanism in kinoshitalite is AK+ + IVSi4+ < (ABa2+, ÀÑa2+) + IVAl3+. Skarn formation may be divided into three stages: formation of diopside skarn in contact with enderbite and dolomite; formation of enstatite skarn connecting with the process of charnokitization and ductile deformation zones. Ba-rich micas have been formed exactly during second stage of skarn formation. At the third stage (retrograde stage) Ba-rich micas was depleted on Ba2+. Then Ba2+ precipitated from solutions in upper horizons in form of romanechite and gorceixite.
Key words: Ba-micas, kinoshitalite, ferrokinoshitalite, phlogopite, magnesian skarn, calcsilicate, Zavallya graphite deposit, Ukraine.
P. 64–72
ACCESSORY MINERALS OF KIROVOHRADS’KYI TYPE GRANITES
IN THE CENTRAL PART OF THE UKRAINIAN SHIELD
O. Chepizhko, V. Kadurin, L. Shatokhina
Study of accessory minerals of Voznesens’kyi, Bobrynets’kyi, Kirovohrads’kyi and other granite massifs of kirovohrads’ky complex in the central part of the Ukrainian Shield have been executed. Accessory minerals which constantly happen and are the most informing in a genetic aspect are more detailed in all explored. Generation analysis of accessory minerals, foremost to zircon, and the detailed study of internal structure of his difficult crystals enable to describe the features of petrogenetic process. The design of zircon crystals forming process on the basis of their internal structure helped to find out ran across the process of
crystallization and confirmed the polyultrametamorphic process of their formation. Ultrametamorphism is the process of accumulation of rare-earth and rare-metal mineralization at the final stages. At the same time in geochemical specialization this process is not identified. Accordingly, mineralogenetic specialization of granitoids can be find out most expressly during the analysis of accessory minerals which contain information about sequence and concentration of rare-earth and rare-metal miner-alization.
Key words: accessory minerals, zircon, process of crystallization, granitoids, mineralogenetic specialization, Ukrainian Shield.
P. 73–79
PETROGRAPHIC FEATURES OF MESOZOIC AND CENOZOIC KIMBERLITE (LAMPROITE) VOLCANISM
IN THE CENTRAL PART OF INHULSKYI MEGABLOCK (UKRAINIAN SHIELD)
Direct indications of kimberlite (lamproite) volcanism on the boundary of Mesozoic and Cenozoic in the central part of Inhulskyi megablock have been determined on the basis of core samples complex petrographic and mineralogical studying.
Key words: kimberlite, lamproite, xenotuff-breccia, petrography, Mesozoic, Cenozoic, Ukrainian Shield.
P. 80–87
APPLICATION OF SECONDARY KIMBERLITE MINERALS FOR DEFINITION OF DIATREMES’ EROSIVE CUT
Results of complex research of secondary kimberlite minerals in connection with possi-bility of their application for specifying the size of an erosive cut of kimberlite pipes are given, which is recommended to use in combination with geologic-structural investigations concerning this question. The small erosive cut of diatremes (pipes Aykhal, Yubileynaya, Sytykanskaya and others in Daldyn-Alakit region of the Siberian platform) is emphasized by availability of layered kimberlite tuffs of sedimentary-volcanogenic origin in upper parts of the finds. The presence of thick weathering profiles at the top levels of volcanic pipes can also point to weak erosive cut of kimberlites. Practically complete disappearance of amethyst-like quartz druses in such pipes at the depth of several tens of meters from the surface can also be interpreted as the proof of their development in the tops of poorly eroded kimberlite bodies. In that case frequent finds of quartz and chalcedony druses and other new formations in kimberlites of the pipes’ upper levels as well can also be considered indi-rect evidence of weak erosive character of the pipes, which should be taken into account when forecasting diamond placers in this region.
Key words: kimberlite pipe, secondary kimberlite minerals, erosive cut, diamonds, Siberian platform.
P. 88–99
USE OF MICACEOUS FORMATIONS DURING FORECASTING-PROSPECTING WORKS ON DIAMONDS
Western-Yakutian Scientific Centre of the Academy
of Sciences of Republic Sakha (Yakutia), Myrnyi
Results of complex investigation of crusts of weathering on various rocks in diamondi-ferous regions of the Siberian platform are given and their concentration in productive Up-per Palaeozoic and Mesozoic sedimentary terrains of the same territory is determined. Special attention is paid to micaceous formations, for which their typomorphic features in eluvium in various by mineralogical and petrographic composition rocks are established. Comparative analysis of reviewed during work crusts of weathering indicates that together with mineralogical features of source rocks and hydrogeochemical conditions of environ-ment three following factors have great significance in forming eluvial products. The first is the degree of structural order of primary minerals. The second is connected with inheritance of these properties by newly arising phases. And the third includes universality of the proc-ess of transforming hypogene and formation of hypergene minerals in the profiles of weath-ering developed on various types of rocks. Thus successful use of these formulated com-plementary provisions for objective revelation of regularities of zonal structure of crusts of weathering can be based only on their complex optical-electronic-microscopic and struc-tural-crystallochemical investigation. The established typomorphic features of micaceous rocks, typical of hypergenely altered micaceous rocks, can be successfully employed during forecasting-prospecting works on diamonds, in particular for refinement of ablation sources of local material during palaeogeographic reconstructions of various terrains of Upper Palaeozoic and Mesozoic ages.
Key words: crust of weathering, mica, typomorphic features, hypergenesis, daimond-bearing territories, Upper Palaeozoic, Mesozoic, Siberian platform.
P. 100–106
PETROCHEMICAL PECULIARITIES OF PRECAMBRIAN GRANITOID COMPLEXES – THE INDICATION OF POTENTIALLY
DIAMOND-BEARING TERRITORIES
Information of commons about maturity of diamond-bearing territories lithosphere is resulted. On the basis of spatial changeability analysis of the Ukrainian Shield granitoid complexes potassium index and thickness of lithosphere supposition is done about belonging of Inhulets’kyi megablock to potentially diamond-bearing objects.
Key words: diamond-bearing territories, lithosphere, granitoids, potassium index, Precambrian, Ukrainian Shield.
P. 107–112
The zone structure of vein is deciphered with the help of electrochemical ions behav-iour in the mineral forming solutions of vein bodies in which fluorite is located in the outlying parts of veins, and barite is placed in the central zones. It is proved, that precipi-tation of fluorite and barite occurred owing to anode–cathode interaction between vein body and wall rocks, and ions movement of the mineral forming solutions was controlled by the cations and anions oxidation-reduction potentials values.
Key words: electrogeochemistry, oxidation-reduction potential, quartz, fluorite, barite, gold, Transcarpathians.
P. 113–118
DEPENDENCE OF THE CHEMICAL ELEMENTS FORMS IN SEA WATER ON THEIR POSITION IN THE PERIODIC SYSTEM
Ivan Franko National University of Lviv
Hrushevskogo St. 4, UA – 79005 Lviv, Ukraine
E-mail: mineral@ franko.lviv.ua
The forms of chemical elements in sea water depending on the structure of their elec-tronic shells (position in the Periodic system) have been analysed. It is found out, that alkaline and alkalihe-earth elements, except for to the beryllium, valency of which is +1, +2, are in sea water (and in other natural waters) in the form of simple ions. Their potentials of ionization do not exceed 28 eV, and ionic potential – less than 2,7. Other chemical elements, valency of which is +3 and more high, and the total values of potentials of ionization and ionic potential are high, form complex anions. Inert gases, having the completed structure of external electronic shell, are in natural terms in the form of neutral atoms.
Key words: chemical elements, sea water, potential of ionization, ionic potential, Periodic system.
P. 119–124
GENESIS OF RHYTHMICAL BEDDING IN TECHNOGENETIC RAW MATERIALS DISPERSED SEDIMENTS
The petrological features of slime deposits and reasons of their structurally-texture heterogeneity origin have been characterized.
Key words: metallurgical slimes, structure, texture, bedding, porosity.
P. 125–128
PECULIARITIES OF HYPERGENIC MINERALOGENESIS IN SLAG DUMPS
Mineral individuals and aggregates in the exogenous products of metallurgical production and their influence on technological features and enrichment of secondary metallurgical raw material are characterized.
Key words: metallurgical slag, mineral structure, exogenous changes, Kryvyi Rih.
P. 129–133
HYDROCARBON GAS DEPOSITS IN KHARKIV AND THE NEIGHBOURING REGIONS – THE REAL SOURCE OF OWN HELIUM SUPPLYFOR SCIENTIFIC AND PRODUCTION NEEDS IN UKRAINE
V.N. Karazin National University of Kharkiv
Svobody Sq. 4, UA – 61077 Kharkiv, Ukraine
The article gives ground to the thesis that the only real source of obtaining Ukraine’s own helium (which is wholly imported today) are the helium-bearing deposits of hydro-carbon gas of Kharkiv and the neighbouring regions, as well as the irrationality and in-admissibility of non-complex usage of hydrocarbon gas solely as a fuel, which results in irreplenishable loses of the valuable noble gas – helium.
Key words: helium, helium-bearing deposits, complex usage of hydrocarbon gas, Ukraine.
P. 134–142
MINERALOGICAL CRITERIA OF COPPER-BEARING VENDIAN TRAPS OF VOLYNO-PODILLYA REGION
Rivne Geological Expedition of PDRGP “Pivnichgeologiya”
E-mail: rge@rv.uar.net
InThe mineralogical criteria of copper-bearing neoproterozoic traps complexes of Volyno-Podillya are considered: regional and local hydrothermal mineralogical zoning, some peculiarities of native copper (forms of crystals and monomineral aggregates, chemical composition, morphological types of copper mineralization), presence of miner-als-indicators of copper mineralization.
Key words: traps, native copper, mineralogical criteria, minerals-indicators, volyn’ series, Vendian, Ukraine.
P. 143–145
INTERNATIONAL SCIENTIFIC ACADEMY “ACTUAL PROBLEMS OF MINERALOGY AND PETROLOGY”
(on the 100 anniversary of academician Volodymyr Stepanovych Sobolev birthday)
Ivan Franko National University of Lviv
Hrushevskogo St. 4, UA – 79005 Lviv, Ukraine
E-mail: mineral@ franko.lviv.ua
P. 146–149
INTERNATIONAL SCIENTIFIC CONFERENCE “BIOMINERALOGY–2008”
Ivan Franko National University of Lviv
Hrushevskogo St. 4, UA – 79005 Lviv, Ukraine
E-mail: mineral@ franko.lviv.ua
P. 150–154
P. 155–159
P. 160–163