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  Subjects -> ENGINEERING (Total: 2277 journals)
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CHEMICAL ENGINEERING (191 journals)                     

Showing 1 - 191 of 191 Journals sorted alphabetically
AATCC Journal of Research     Full-text available via subscription   (Followers: 6)
ACS Sustainable Chemistry & Engineering     Hybrid Journal   (Followers: 5)
Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials     Hybrid Journal   (Followers: 5)
Acta Polymerica     Hybrid Journal   (Followers: 9)
Additives for Polymers     Full-text available via subscription   (Followers: 20)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 7)
Advanced Chemical Engineering Research     Open Access   (Followers: 31)
Advanced Powder Technology     Hybrid Journal   (Followers: 16)
Advances in Applied Ceramics     Hybrid Journal   (Followers: 5)
Advances in Chemical Engineering     Full-text available via subscription   (Followers: 24)
Advances in Chemical Engineering and Science     Open Access   (Followers: 53)
Advances in Polymer Technology     Hybrid Journal   (Followers: 13)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 7)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 10)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 13)
Anti-Corrosion Methods and Materials     Hybrid Journal   (Followers: 10)
Applied Petrochemical Research     Open Access   (Followers: 2)
Asia-Pacific Journal of Chemical Engineering     Hybrid Journal   (Followers: 7)
Biochemical Engineering Journal     Hybrid Journal   (Followers: 14)
Biofuel Research Journal     Open Access   (Followers: 4)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Brazilian Journal of Chemical Engineering     Open Access   (Followers: 3)
Bulletin of Chemical Reaction Engineering & Catalysis     Open Access   (Followers: 2)
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 2)
Carbohydrate Polymers     Hybrid Journal   (Followers: 8)
Catalysts     Open Access   (Followers: 7)
ChemBioEng Reviews     Full-text available via subscription   (Followers: 1)
Chemical and Engineering News     Free   (Followers: 12)
Chemical and Materials Engineering     Open Access   (Followers: 13)
Chemical and Petroleum Engineering     Hybrid Journal   (Followers: 13)
Chemical and Process Engineering     Open Access   (Followers: 27)
Chemical and Process Engineering Research     Open Access   (Followers: 24)
Chemical Engineering & Technology     Hybrid Journal   (Followers: 32)
Chemical Engineering and Processing: Process Intensification     Hybrid Journal   (Followers: 17)
Chemical Engineering and Science     Open Access   (Followers: 19)
Chemical Engineering Communications     Hybrid Journal   (Followers: 14)
Chemical Engineering Education     Full-text available via subscription  
Chemical Engineering Journal     Hybrid Journal   (Followers: 41)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 23)
Chemical Engineering Research Bulletin     Open Access   (Followers: 12)
Chemical Engineering Science     Hybrid Journal   (Followers: 27)
Chemical Geology     Hybrid Journal   (Followers: 19)
Chemical Papers     Hybrid Journal   (Followers: 2)
Chemical Product and Process Modeling     Hybrid Journal   (Followers: 4)
Chemical Reviews     Full-text available via subscription   (Followers: 175)
Chemical Society Reviews     Full-text available via subscription   (Followers: 41)
Chemical Technology     Open Access   (Followers: 16)
ChemInform     Hybrid Journal   (Followers: 8)
Chemistry & Industry     Hybrid Journal   (Followers: 5)
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry of Materials     Full-text available via subscription   (Followers: 251)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 15)
ChemSusChem     Hybrid Journal   (Followers: 7)
Chinese Chemical Letters     Full-text available via subscription   (Followers: 2)
Chinese Journal of Chemical Engineering     Full-text available via subscription   (Followers: 4)
Chinese Journal of Chemical Physics     Hybrid Journal   (Followers: 1)
Coke and Chemistry     Hybrid Journal   (Followers: 1)
Coloration Technology     Hybrid Journal   (Followers: 1)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 12)
Computer Aided Chemical Engineering     Full-text available via subscription   (Followers: 1)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 9)
CORROSION     Full-text available via subscription   (Followers: 20)
Corrosion Engineering, Science and Technology     Hybrid Journal   (Followers: 36)
Corrosion Reviews     Hybrid Journal   (Followers: 6)
Crystal Research and Technology     Hybrid Journal   (Followers: 6)
Current Opinion in Chemical Engineering     Open Access   (Followers: 7)
Education for Chemical Engineers     Hybrid Journal   (Followers: 5)
Eksergi     Open Access  
Emerging Trends in Chemical Engineering     Full-text available via subscription   (Followers: 3)
European Polymer Journal     Hybrid Journal   (Followers: 41)
Fibers and Polymers     Full-text available via subscription   (Followers: 6)
Fluorescent Materials     Open Access   (Followers: 1)
Focusing on Modern Food Industry     Open Access   (Followers: 2)
Frontiers of Chemical Science and Engineering     Hybrid Journal   (Followers: 2)
Gels     Open Access  
Geochemistry International     Hybrid Journal   (Followers: 2)
Handbook of Powder Technology     Full-text available via subscription   (Followers: 6)
Heat Exchangers     Open Access   (Followers: 3)
High Performance Polymers     Hybrid Journal   (Followers: 1)
Hungarian Journal of Industry and Chemistry     Open Access  
Indian Chemical Engineer     Hybrid Journal   (Followers: 5)
Indian Journal of Chemical Technology (IJCT)     Open Access   (Followers: 10)
Indonesian Journal of Chemical Science     Open Access   (Followers: 1)
Industrial & Engineering Chemistry     Full-text available via subscription   (Followers: 11)
Industrial & Engineering Chemistry Research     Full-text available via subscription   (Followers: 21)
Industrial Chemistry Library     Full-text available via subscription   (Followers: 3)
Industrial Gases     Open Access  
Info Chimie Magazine     Full-text available via subscription   (Followers: 3)
International Journal of Chemical and Petroleum Sciences     Open Access   (Followers: 3)
International Journal of Chemical Engineering     Open Access   (Followers: 7)
International Journal of Chemical Reactor Engineering     Hybrid Journal   (Followers: 3)
International Journal of Chemical Technology     Open Access   (Followers: 5)
International Journal of Chemoinformatics and Chemical Engineering     Full-text available via subscription   (Followers: 2)
International Journal of Food Science     Open Access   (Followers: 3)
International Journal of Industrial Chemistry     Open Access   (Followers: 1)
International Journal of Polymeric Materials     Hybrid Journal   (Followers: 6)
International Journal of Waste Resources     Open Access   (Followers: 4)
Journal of Chemical Engineering & Process Technology     Open Access   (Followers: 5)
Journal of Applied Crystallography     Hybrid Journal   (Followers: 6)
Journal of Applied Electrochemistry     Hybrid Journal   (Followers: 14)
Journal of Applied Polymer Science     Hybrid Journal   (Followers: 174)
Journal of Biomaterials Science, Polymer Edition     Hybrid Journal   (Followers: 9)
Journal of Bioprocess Engineering and Biorefinery     Full-text available via subscription  
Journal of Chemical & Engineering Data     Full-text available via subscription   (Followers: 11)
Journal of Chemical and Biological Interfaces     Full-text available via subscription   (Followers: 1)
Journal of Chemical Ecology     Hybrid Journal   (Followers: 6)
Journal of Chemical Engineering     Open Access   (Followers: 20)
Journal of Chemical Engineering and Materials Science     Open Access   (Followers: 2)
Journal of Chemical Science and Technology     Open Access   (Followers: 4)
Journal of Chemical Sciences     Partially Free   (Followers: 19)
Journal of Chemical Technology & Biotechnology     Hybrid Journal   (Followers: 10)
Journal of Chemical Theory and Computation     Full-text available via subscription   (Followers: 15)
Journal of CO2 Utilization     Hybrid Journal   (Followers: 2)
Journal of Combinatorial Chemistry     Full-text available via subscription  
Journal of Crystallization Process and Technology     Open Access   (Followers: 8)
Journal of Environmental Chemical Engineering     Hybrid Journal   (Followers: 5)
Journal of Food Measurement and Characterization     Hybrid Journal  
Journal of Food Processing & Technology     Open Access   (Followers: 1)
Journal of Fuel Chemistry and Technology     Full-text available via subscription   (Followers: 4)
Journal of Geochemical Exploration     Hybrid Journal   (Followers: 1)
Journal of Industrial and Engineering Chemistry     Hybrid Journal   (Followers: 1)
Journal of Information Display     Hybrid Journal   (Followers: 1)
Journal of Inorganic and Organometallic Polymers and Materials     Partially Free   (Followers: 9)
Journal of Modern Chemistry & Chemical Technology     Full-text available via subscription   (Followers: 2)
Journal of Molecular Catalysis A: Chemical     Hybrid Journal   (Followers: 6)
Journal of Non-Crystalline Solids     Hybrid Journal   (Followers: 8)
Journal of Organic Semiconductors     Open Access   (Followers: 5)
Journal of Physics and Chemistry of Solids     Hybrid Journal   (Followers: 5)
Journal of Polymer and Biopolymer Physics Chemistry     Open Access   (Followers: 6)
Journal of Polymer Engineering     Hybrid Journal   (Followers: 9)
Journal of Polymer Research     Hybrid Journal   (Followers: 6)
Journal of Polymer Science Part C : Polymer Letters     Hybrid Journal   (Followers: 6)
Journal of Polymers     Open Access   (Followers: 6)
Journal of Polymers and the Environment     Hybrid Journal   (Followers: 1)
Journal of Pure and Applied Chemistry Research     Open Access   (Followers: 2)
Journal of the American Chemical Society     Full-text available via subscription   (Followers: 297)
Journal of the Bangladesh Chemical Society     Open Access  
Journal of the Brazilian Chemical Society     Open Access   (Followers: 2)
Journal of The Institution of Engineers (India) : Series E     Hybrid Journal   (Followers: 1)
Journal of the Pakistan Institute of Chemical Engineers     Open Access   (Followers: 1)
Journal of the Taiwan Institute of Chemical Engineers     Hybrid Journal   (Followers: 2)
Journal of Water Chemistry and Technology     Hybrid Journal   (Followers: 9)
Jurnal Bahan Alam Terbarukan     Open Access  
Jurnal Inovasi Pendidikan Kimia     Open Access   (Followers: 5)
Jurnal Reaktor     Open Access  
Jurnal Rekayasa Kimia & Lingkungan     Open Access  
Jurnal Teknologi Dan Industri Pangan     Open Access   (Followers: 1)
Konversi     Open Access  
Korean Journal of Chemical Engineering     Hybrid Journal   (Followers: 3)
Main Group Metal Chemistry     Hybrid Journal   (Followers: 1)
Materials Chemistry and Physics     Full-text available via subscription   (Followers: 16)
Materials Science and Applied Chemistry     Open Access  
Materials Sciences and Applied Chemistry     Full-text available via subscription  
Modern Chemistry & Applications     Open Access  
Molecular Imprinting     Open Access  
Nanochemistry Research     Open Access  
Nanocontainers     Open Access   (Followers: 1)
Nanofabrication     Open Access  
Noise Control Engineering Journal     Full-text available via subscription   (Followers: 4)
Ochrona Srodowiska i Zasobów Naturalnych : Environmental Protection and Natural Resources     Open Access  
Petroleum Chemistry     Hybrid Journal   (Followers: 1)
Physics and Chemistry of Glasses - European Journal of Glass Science and Technology Part B     Full-text available via subscription   (Followers: 4)
Plasma Processes and Polymers     Hybrid Journal   (Followers: 3)
Plasmas and Polymers     Hybrid Journal  
Polymer     Hybrid Journal   (Followers: 126)
Polymer Bulletin     Hybrid Journal   (Followers: 7)
Polymer Composites     Hybrid Journal   (Followers: 15)
Polyolefins Journal     Open Access  
Powder Technology     Hybrid Journal   (Followers: 13)
Recyclable Catalysis     Open Access   (Followers: 1)
Research on Chemical Intermediates     Hybrid Journal  
Reviews in Chemical Engineering     Hybrid Journal   (Followers: 5)
Revista ION     Open Access  
Revista Mexicana de Ingeniería Química     Open Access  
Rubber Chemistry and Technology     Full-text available via subscription   (Followers: 2)
Russian Chemical Bulletin     Hybrid Journal   (Followers: 2)
Russian Journal of Applied Chemistry     Hybrid Journal   (Followers: 1)
Science and Engineering of Composite Materials     Hybrid Journal   (Followers: 61)
Solid Fuel Chemistry     Hybrid Journal  
South African Journal of Chemical Engineering     Open Access   (Followers: 2)
South African Journal of Chemistry     Open Access   (Followers: 2)
Surface Engineering and Applied Electrochemistry     Hybrid Journal   (Followers: 6)
Sustainable Chemical Processes     Open Access   (Followers: 2)
Synthesis Lectures on Chemical Engineering and Biochemical Engineering     Full-text available via subscription  
The Canadian Journal of Chemical Engineering     Hybrid Journal   (Followers: 3)
The Chemical Record     Hybrid Journal   (Followers: 1)
Theoretical Foundations of Chemical Engineering     Hybrid Journal   (Followers: 2)
Transition Metal Chemistry     Hybrid Journal   (Followers: 4)
Transylvanian Review of Systematical and Ecological Research     Open Access  
Visegrad Journal on Bioeconomy and Sustainable Development     Open Access   (Followers: 2)
Zeitschrift für Naturforschung B : A Journal of Chemical Sciences     Open Access   (Followers: 1)

           

Journal Cover Geochemistry International
  [SJR: 0.399]   [H-I: 18]   [2 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1556-1968 - ISSN (Online) 0016-7029
   Published by Springer-Verlag Homepage  [2353 journals]
  • Redox conditions during crystallization of ultramafic and gabbroic rocks
           of the Yoko–Dovyren massif (Based on the results of measurements of
           intrinsic oxygen fugacity of olivine)
    • Authors: A. A. Ariskin; I. S. Fomin; E. V. Zharkova; A. A. Kadik; G. S. Nikolaev
      Pages: 595 - 607
      Abstract: We present the results of electrochemical measurements of the intrinsic oxygen fugacity of olivine separates representing seven rock types from the central part and southwestern termination of the Yoko–Dovyren mafic—ultramafic massif. The \({f_{{O_2}}}\) values were determined using a high-temperature solid-electrolyte double-cell assembly developed at the Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences. A total of 59 experiments were performed (from 7 to 16 for each sample) at the atmospheric pressure and within the temperature range of 800–1050°C at the 30–50°C increment. The results were interpreted using the calculated log \({f_{{O_2}}}\) – 1/T(K) and log \({f_{{O_2}}}\) – T(°C) dependences. It was shown that the subsolidus temperature range of the rocks (below ~1050°C) is characterized by lowest intrinsic oxygen fugacity of olivine, which is 1–4 log units below the QFM buffer. For the solidus temperatures of ~1100°C, the more oxidized conditions ranging approximately from QFM to ~QFM-3 were measured. Extrapolating the log \({f_{{O_2}}}\) – T°C dependences to the temperatures of the original magmas (~1200–1300°C) produces the maximum scatter in oxygen fugacities from ~QFM+2.5 to QFM-1. The estimated range of redox conditions for the Dovyren magma crystallization lies between the QFM and ~QFM-2.5 buffer equilibria. This is consistent with the complete absence of primary magmatic titanomagnetite and the presence of ilmenite in the Dovyren rocks.
      PubDate: 2017-07-01
      DOI: 10.1134/s0016702917070023
      Issue No: Vol. 55, No. 7 (2017)
       
  • Riphean low-carbonaceous shales of the South Urals in the context of
           formation of large igneous provinces
    • Authors: A. V. Maslov; S. G. Kovalev; E. Z. Gareev
      Pages: 608 - 620
      Abstract: Relationship of large magmatic/plume events, warm periods, and epochs of accumulation of variably Сorg–rich sediments is considered by the example of Riphean low-carbonaceous shales of the western slope of the South Urals. It is shown that this relationship presumably exists for some of the indicated events (as for Early Precambrian superplume events), and does not exist for others. The formation of organic carbon-rich sediments in the Late Precambrian was likely controlled by other external and internal factors than in the Early Precambrian, relationships between which are so far poorly understood. It is also possible that the lesser scale of plume events in the Late Precambrian as compared to previous epochs could lead to the obliteration of their influence on the formation of Сorg–rich sedimentary rocks, as well as to the local accumulation of the latters.
      PubDate: 2017-07-01
      DOI: 10.1134/s0016702917070059
      Issue No: Vol. 55, No. 7 (2017)
       
  • Coronitic textures in the ferrogabbros of the Elet’ozero intrusive
           complex (Northern Karelia, Russia) as evidence for the existence of
           Fe-rich melt. 2. Origin of Fe-rich liquid
    • Authors: E. V. Sharkov; A. V. Chistyakov
      Pages: 621 - 628
      Abstract: The study of coronitic textures in ferrogabbros and data on rhythmic layering of the Elet’ozero Massif supports the existence of a specific low-temperature Fe-rich liquid in nature. This liquid was formed during solidification of intrusion owing to the local multiple accumulation of Fe and Ti contents in a parental Fe-rich Fe–Ti basaltic melt. According to obtained data, this occurred on micro- and macroscale: 1) in the interglanular (intercumulus) space of the crystallization zone where intercumulus melt becomes rich in Fe and Ti owing to the crystallization of cumulus silicate minerals and is transformed into Fe-rich liquid, which concentrates residual components of an intergranular melt; 2) during formation of rhythmic layering when Fe-rich residual melt is accumulated before the upper part of the moving front of solidification; when Fe content reaches a certain limit, the melt is also transformed in a separate Fe-rich liquid, the interlayers of which form the upper (lowest temperature) members of rhythms. It was concluded that the emergence of a Fe-rich melt is related to its specific structure, which is formed when the Fe content reaches certain critical values in a liquid. Thus, this liquid is not a product of immiscible splitting of a melt, but represents a peculiar phenomenon. The preservation of primary textures and structures of the rocks is supposedly related to the lyophobic properties of surfaces, i.e., “repulsion” of nonwetting liquid by facets of cumulus crystals, especially plagioclase. Owing to this, the drops and even horizons of heavy Fe-rich liquid are retained in situ of their formation.
      PubDate: 2017-07-01
      DOI: 10.1134/s0016702917070096
      Issue No: Vol. 55, No. 7 (2017)
       
  • Mean concentrations of volatile components, major and trace elements in
           magmatic melts in major geodynamic environments on Earth. I. Mafic melts
    • Authors: V. B. Naumov; V. A. Dorofeeva; A. V. Girnis; V. V. Yarmolyuk
      Pages: 629 - 653
      Abstract: Mean concentrations of major components, trace elements, and volatile components in magmatic melts from Earth’s major geodynamic environments are estimated using our database (which comprises more than 1200000 analyses for 75 chemical elements—state for the beginning of 2016) on melt inclusions and quench glasses of rocks). The geodynamic environments are classified into (I) environments of oceanic plate spreading (mid-oceanic ridges), (II) areas affected by mantle plumes in oceanic plates (oceanic islands and lava plateaus), (III and IV) subduction-related environments (III are magmatic zones in island arcs, and IV are magmatic zones in active continental margins, in which magma-generating processes involve the continental crust), (V) continental rifts in areas with continental hotspots, and (VI) backarc spreading zones. The distribution of SiO2 concentrations (>71000 analyses) in natural magmatic melts in all geodynamic environments is obviously bimodal, with maxima at 50–52 and 72–76 wt % SiO2. Herein we discuss only mafic melts (40–54 wt % SiO2). Mean concentrations and confidence levels are calculated for each geodynamic environment for the first time in three variants: from melt inclusions in minerals, from quench glasses in rocks, and from all data. Systematic variations in the mean compositions of melt inclusions and glasses in rocks are detected for all geodynamic environments. Primitive mantle-normalized multielemental patterns for mean concentrations of elements are constructed for magmatic melts from all geodynamic environments, and the mean ratios and their variations are calculated for trace incompatible and volatile components (H2O/Ce, K2O/Cl, La/Y, Nb/U, Ba/Rb, Ce/Pb, etc.) in melts from all environments.
      PubDate: 2017-07-01
      DOI: 10.1134/s0016702917070060
      Issue No: Vol. 55, No. 7 (2017)
       
  • Contents of radionuclides in soil and biota at the site of the Kraton-3
           accidental underground nuclear test, Yakutia
    • Authors: T. A. Goryachenkova; P. I. Sobakin; A. P. Chevychelov; Ya. P. Gerasimov; I. E. Kazinskaya; E. A. Lavrinovich; E. V. Kuzovkina; V. S. Ryleeva; A. V. Abramova; A. P. Novikov
      Pages: 654 - 662
      Abstract: The paper presents results of radiocological monitoring at the site of the Kraton-3 accidental underground nuclear test in Yakutia. The distribution and migration of 137Cs, 90Sr, 237Np, and 238–240Pu in the soil and its living cover of the northern taiga are analyzed, and it is demonstrated that the radioecological conditions at the territory are still adverse in spite of the rehabilitation measures.
      PubDate: 2017-07-01
      DOI: 10.1134/s0016702917070047
      Issue No: Vol. 55, No. 7 (2017)
       
  • Evolution of pyroxene in peralkaline magmatic system: An example of an
           agpaitic syenite dyke complex and the Niva intrusion, Kola Peninsula
    • Authors: M. I. Filina; L. N. Kogarko; N. N. Kononkova
      Pages: 663 - 668
      Abstract: The paper presents pioneering data on the composition of pyroxenes and the distribution of trace elements in this mineral in small geological bodies that were formed by single magma injections and their subsequent rapid crystallization: the Niva intrusion and an agpaitic syenite dyke. The pyroxene is highly alkaline and shows continuous compositional trends with an increase in the aegirine concentration. The Ti concentrations of the pyroxene are much higher than in pyroxenes in agpaitic syenites in other alkaline complexes. In spite of the fact that the pyroxene is hosted in small bodies, the evolution of these pyroxenes was similar to that of pyroxenes in the Lovozero and Khibina alkaline massifs.
      PubDate: 2017-07-01
      DOI: 10.1134/s0016702917070035
      Issue No: Vol. 55, No. 7 (2017)
       
  • Thermochemical study Mg–Fe amphiboles
    • Authors: L. P. Ogorodova; I. A. Kiseleva; M. F. Vigasina; L. V. Mel’chakova; D. A. Ksenofontov; I. A. Bryzgalov
      Pages: 669 - 673
      Abstract: The paper presents data on the thermochemical study (high-temperature melt calorimetry in a Tian–Calvet microcalorometer) of two natural Mg–Fe amphiboles: anthophyllite Mg2.0(Mg4.8Fe0.2 2+)[Si8.0O22](OH)2 from Kukh-i-Lal, southwestern Pamirs, Tajikistan, and gedrite Na0.4Mg2.0(Mg1.7Fe0.2 2+Al1.3)[Si6.3Al1.7O22](OH)2 from the Kola Peninsula, Russia. The enthalpy of formation from elements is obtained as–12021 ± 20 kJ/mol for anthophyllite and as–11545 ± 12 kJ/mol for gedrite. The standard entropy, enthalpy, and Gibbs energy of formation are evaluated for Mg–Fe amphiboles of theoretical composition.
      PubDate: 2017-07-01
      DOI: 10.1134/s0016702917070084
      Issue No: Vol. 55, No. 7 (2017)
       
  • Geochemistry of sediments of the Holocene transgressive sequences of the
           Kara Sea
    • Authors: K. V. Syromyatnikov; M. A. Levitan; T. G. Kuzmina; E. S. Toropchenova; A. V. Zhilkina
      Pages: 503 - 520
      Abstract: Holocene sequences of the Russian Arctic shelf seas are controlled by a combination of three main factors: deglaciation of the Late Pleistocene Barents–Kara ice sheet, global sea-level rise, and river runoff from Eurasia. Sedimentation in the Kara Sea is mainly defined by two latter factors. The lithological, grainsize, mineralogical, and micropaleontological compositions of the Holocene sequences of this basin have been widely studied, but only a few works report geochemical data. This paper considers comprehensive geochemical data on two cores from the Yenisei transect obtained during cruise of the R/V Akademik Petrov in 2000. Both the cores were dated by radiocarbon accelerator mass spectrometric method (AMS 14C) and analyzed using XRF and ICP MS methods. The study revealed and described differences in their chemical composition, which are caused by different facies settings of accumulation, their grain size composition, and influence of river run-off.
      PubDate: 2017-06-01
      DOI: 10.1134/s001670291706009x
      Issue No: Vol. 55, No. 6 (2017)
       
  • Mineralogy, U–Pb (TIMS, SHRIMP) age, and rare-earth elements in zircons
           from granites of the Mazara Massif, South Urals
    • Authors: A. A. Krasnobaev; V. N. Puchkov; N. D. Sergeeva; S. V. Busharina
      Pages: 521 - 534
      Abstract: The paper reports the results of mineralogical, geochemical, and geochronological (TIMS and SHRIMP) study of heterogeneous zircons from granites of the Mazara Massif, South Urals. Obtained data revealed the Mesoproterozoic age (1550–1390 Ma) of a granite protolith and the Neoproterozoic age of their formation (745–710 Ma). In the La–Sm/La diagram, the zircons of the massif occupy an intermediate position between the fields of magmatic and metasomatic (hydrothermal) zircons. This “intermediate” field is proposed to ascribe to the late magmatic zircons, which provides more reliable characterization of zircon formation throughout the entire crystallization history of a granite melt, up to the appearance of genetically metamict metasomatic hydrozircons.
      PubDate: 2017-06-01
      DOI: 10.1134/s0016702917060040
      Issue No: Vol. 55, No. 6 (2017)
       
  • Coronitic textures in the ferrogabbroids of the Elet’ozero intrusive
           complex (northern Karelia, Russia) as evidence for the existence of
           Fe-rich melt. 1. Types of coronas
    • Authors: E. V. Sharkov; A. V. Chistyakov
      Pages: 535 - 547
      Abstract: Fe–Ti oxides (magnetite, Ti-magnetite, ilmenite, and associated high-Al spinel) in the ferrogabbroids of the Middle Paleoproterozoic Elet’ozero syenite–gabbro intrusion are intercumulus minerals usually surrounded by coronitic rims of two types. The first type usually represents multilayer amphibole–biotite ± olivine coronas along contacts of Fe–Ti oxides with cumulus moderate-Ca plagioclase and more rarely, clinopyroxene. Two-layer rim is developed in contact with high-Ca plagioclase; the inner rim consists of pargasite and spinel, while the outer rim is made up of sadanagaite and spinel. The second type is represented by two-stage coronitic textures developed along boundaries of olivine and Fe–Ti oxide clusters with plagioclase. Initially, the olivine was surrounded by orthopyroxene rim, while Fe–Ti oxides were rimmed by pargasite with thin ingrowths of high-Al spinel (hercynite). At the next stage, the entire cluster was fringed by a common symplectite reaction rim, the composition of which also depended on the composition of plagioclase matrix: the spinel–sadanagaite rim was formed in contact with high-Ca plagioclase, while pargasite–muscovite–scapolite rim was formed in contact with moderate-Ca plagioclase. The formation of the outer rims occurred after hydration of the inner parts of coronas around olivine and oxides within the clusters. It is suggested that the Fe–Ti oxides and surrounding coronitic rims were microsystems formed by crystallization of drops of residual hydrous Fe-rich liquid.
      PubDate: 2017-06-01
      DOI: 10.1134/s0016702917060076
      Issue No: Vol. 55, No. 6 (2017)
       
  • Organic matter in Upper Devonian deposits of the Chernyshev Ridge
    • Authors: D. A. Bushnev; N. S. Burdel’naya; A. V. Zhuravlev
      Pages: 548 - 558
      Abstract: The study provides the first data on organic matter from Upper Devonian deposits of the Shar’yu River section (Chernyshev Ridge, Northern Urals). Oil shales from the Middle and Middle–Upper Domanik intervals and carbonaceous shales from the Upper Frasnian intervals were analyzed. The biomarker analysis revealed similar characteristics of organic matter from studied samples and Domanik-facies rocks of the Ukhta area. It was also shown that organic matter from the studied Domanik section is characterized by compositional heterogeneity. The biomarker and stable carbon isotope compositions of bitumen extracts, their fractions, and kerogen of the Middle and Middle–Upper Domanik shales are different from those of the Upper Frasnian shale, which may indicate the variation in depositional setting.
      PubDate: 2017-06-01
      DOI: 10.1134/s0016702917060027
      Issue No: Vol. 55, No. 6 (2017)
       
  • Evaluation of the pH buffer capacity of natural lake waters in western
           Siberia: Criteria of resistance to acidification
    • Authors: T. A. Kremleva; T. I. Moiseenko
      Pages: 559 - 568
      Abstract: A new technique is suggested for evaluating the pH buffer capacity of natural aquatic systems (as exemplified by small lakes in western Siberia) with regard for the pH values of the lake waters and the concentrations of the hydrocarbonate ion and anions of humic acids,. The acid-neutralizing capacity evaluated for small lakes in western Siberia by conventionally used techniques (which was suggested by Norwegian researchers) is compared with evaluations by the technique suggested by the authors. Criteria are suggested for quantifying the immunity of natural waters to acidification in various natural climatic zones in western Siberia.
      PubDate: 2017-06-01
      DOI: 10.1134/s0016702917060052
      Issue No: Vol. 55, No. 6 (2017)
       
  • Role of hydrogen in the formation of associated gases and
           postsedimentation transformations of salt rocks of the Verkhnekamskoe
           deposit
    • Authors: A. F. Smetannikov; S. N. Shanina
      Pages: 569 - 580
      Abstract: In this paper we discuss relationships between the intensity of epigenetic transformations and the distribution of organic matter, calcium sulfates, and hydrogen in a salt sequence. The timing of incipient epigenetic transformations in the rocks of a potassic salt bed coinciding with the beginning of the radiolysis of crystallization water in carnallite was established. The role of hydrogen in the formation of associated gases and postsedimentation transformations of the salt rocks of the Verkhnekamskoe deposit was evaluated. The formation of methane and associated gases was attributed to the influence of molecular hydrogen on organic matter and sulfur minerals during sulfate reduction.
      PubDate: 2017-06-01
      DOI: 10.1134/s0016702917060088
      Issue No: Vol. 55, No. 6 (2017)
       
  • Integrated approach to determine background concentrations of chemical
           elements in soils
    • Authors: G. O. Tepanosyan; O. A. Belyaeva; L. V. Saakyan; A. K. Sagatelyan
      Pages: 581 - 588
      Abstract: Analysis and calculation techniques of geochemical background concentrations of chemical elements in various systems is of paramount importance for applied geochemistry. Herein we assume the geochemical background as the average of natural variations in the concentrations of chemical elements determined at a territory that highly probable does not host any natural and/or anthropogenic sources of contaminating chemical elements. In the context of determining geochemical background, our research was focused on determining the concentrations of heavy metals in soils in the city of Yerevan with the application of an integrated approach. Comparison of the obtained background values with the mean concentrations of elements in the upper continental crust yields representative data, and the application of various statistical tests (±3σ, ±2σ, and boxplots) is proved to equally efficient.
      PubDate: 2017-06-01
      DOI: 10.1134/s0016702917060106
      Issue No: Vol. 55, No. 6 (2017)
       
  • Factors of 18 O/ 16 O fractionation in corundum estimated from the
           calculation of isotopic shifts on vibration frequencies
    • Authors: D. P. Krylov; V. A. Glebovitskii; E. Yu. Akimova
      Pages: 589 - 594
      Abstract: The β-factors of corundum were estimated on the basis of DFT calculations of vibrational frequency changes due to 16O–18O isotope substitution in a harmonic approximation using an all-electron Gaussian-type basis set and the B3LYP hybrid functional (the CRYSTAL program). Calculations were performed accounting for eight phonon wave vectors within the first Brillouin zone. The results are approximated by the relation 1000ln β crn = 9.19874x–0.12326x 2 + 0.00213x 3 (x = 106/T(K)2, 400 < T(K) < 1300), which can be used in isotope geochemical studies in combination with the known temperature effects on the β-factors of other phases.
      PubDate: 2017-06-01
      DOI: 10.1134/s0016702917060064
      Issue No: Vol. 55, No. 6 (2017)
       
  • Geochemistry of trace element in carbonaceous sediments from recent seas
           and oceans
    • Authors: G. N. Baturin
      Pages: 418 - 427
      Abstract: Published and original data on the contents of 50 elements in carbonaceous sediments from seas (Black, Baltic, and Caspian) and fertile oceanic shelves (shelves of Namibia, Peru, Chile, and California) are generalized. The comparison of these results with the average composition of ancient carbonaceous shales reveals both similarities and differences in the distribution of indicator trace elements (Re, Hg, Se, Ag, Cd, Tl, U, Mo, As, Ni, and Zn). Correlation coefficients were analyzed to determine the characteristic element associations. It is established that oceanic carbonaceous sediments are closer in composition to carbonaceous shales than their marine analogues, which is related to the differences in sedimentation conditions, including hydrological, hydrochemical, and biogeochemical factors. The role of anoxic environment in the accumulation of chalcophile elements in sediments is estimated. The comparison of the contents of some mobile trace elements in oceanic water and carbonaceous sediments of modern oceans demonstrates that the water composition affects the composition of carbonaceous sediments and can be used for deciphering the composition of ancient ocean water.
      PubDate: 2017-05-01
      DOI: 10.1134/s0016702917050044
      Issue No: Vol. 55, No. 5 (2017)
       
  • Light noble gas data in Guli massif carbonatites reveal the subcontinental
           lithospheric mantle as primary fluid source
    • Authors: A. I. Buikin; L. N. Kogarko; J. Hopp; M. Trieloff
      Pages: 457 - 464
      Abstract: For better understanding of the fluid phase sources of carbonatites of Guli alkaline-ultrabasic intrusion (Maymecha-Kotuy complex) we have studied isotope composition of He and Ne in the carbonatites of different formation stages. The data definitely point to the subcontinental lithospheric mantle (SCLM) as a primary source of fluid phase of Guli carbonatites. The absence of plume signature in such a plume-like object (from petrological point of view) could be explained in terms that Guli carbonatites have been formed at the waning stage of plume magmatic activity with an essential input of SCLM components.
      PubDate: 2017-05-01
      DOI: 10.1134/s0016702917050056
      Issue No: Vol. 55, No. 5 (2017)
       
  • Modeling of trace-element composition of sulfide liquid in a crystallizing
           basalt magma: Development of the R -factor concept
    • Authors: A. A. Ariskin; K. A. Bychkov; G. S. Nikolaev
      Pages: 465 - 473
      Abstract: This paper presents principles of the method of modeling metal concentrations in sulfide at the occurrence of silicate–sulfide liquid immiscibility during middle and late stages of the crystallization of mafic–ultramafic magmas. The proposed approach combines the preliminary modeling of the crystallization of heterogeneous (melt + crystals) and initially sulfide-undersaturated systems with the calculation of the trace-element composition of sulfide liquid after its appearance in the system. The first part of the problem is solved using the sulfide version of the COMAGMAT-5 program, and the second part employs the modified Campbell–Naldrett equation. It was shown that a delay in silicate–sulfide liquid immiscibility and the low proportion of separated sulfide to major minerals are important factors of the geochemical evolution of sulfide liquid. By the example of the behavior of Cu, Pd, and Re, we discussed the reasons for differences between calculations for crystallizing multiphase cumulates and simplified (sulfide–silicate melt) systems.
      PubDate: 2017-05-01
      DOI: 10.1134/s0016702917050032
      Issue No: Vol. 55, No. 5 (2017)
       
  • Geochemical features of REE and Y accumulation in the subcolloid fraction
           of sediments from the northern part of Amur Bay (Sea of Japan)
    • Authors: D. M. Polyakov; N. V. Zarubina
      Pages: 489 - 495
      Abstract: The average contents of REE, Y, Fe, Mn, and clay minerals were determined in the subcolloid fraction of bottom sediments from the northern part of Amur Bay. The positive correlation of REE and Y contents with Fe and Mn is related to their flocculation and sorption on Fe, Mn oxyhydroxides and clay minerals (hydromica, smectites). The sediments are subdivided into three groups (sediments from the influence zone of the Razdol’naya River, sediments located along the eastern and western shores of the bay, and sediments weakly subjected to the river influence) with different average contents of REE, Y, Fe, and Mn. It is shown that REE and Y are mainly incorporated (98–100%) in clay minerals.
      PubDate: 2017-05-01
      DOI: 10.1134/s001670291705010x
      Issue No: Vol. 55, No. 5 (2017)
       
  • Iodine differentiation between different sized fractions in natural waters
    • Authors: L. I. Kolmykova; E. M. Korobova; B. N. Ryzhenko; V. Yu. Berezkin; V. M. Shkinev; I. N. Gromyak
      Pages: 496 - 501
      Abstract: Membrane filtration technique was applied to study the distribution of iodine and some other chemical elements (iron, manganese, aluminum, and silicon) in natural waters between different sized fractions (>0.45, 0.45–0.22, 0.22–0.1, and <0.1 μm). The paper presents analysis of factors able to modify the proportions of the adsorbed and dissolved species of the elements in waters. It is proved that up to 90% of the total amount of the iodine ion occurs in aquatic environments in the form of dissolved species (according to the current standard, in the fraction < 0.45 μm), with approximately 49% of the total concentration corresponding to the fraction of <0.10 μm. An increase in the acidity of the waters and their enrichment in finely divided organic and mineral material, and also an increase in Fe and Mn concentrations, may increase in the concentrations of the trace element in the particulate matter (up to 26% of the total iodide concentration). The greatest variations in iodine distribution between different fractions are found in the surface waters.
      PubDate: 2017-05-01
      DOI: 10.1134/s001670291705007x
      Issue No: Vol. 55, No. 5 (2017)
       
 
 
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