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  Subjects -> ENGINEERING (Total: 2291 journals)
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CHEMICAL ENGINEERING (192 journals)                     

Showing 1 - 192 of 192 Journals sorted alphabetically
AATCC Journal of Research     Full-text available via subscription   (Followers: 7)
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: 21)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 8)
Advanced Chemical Engineering Research     Open Access   (Followers: 32)
Advanced Powder Technology     Hybrid Journal   (Followers: 17)
Advances in Applied Ceramics     Hybrid Journal   (Followers: 5)
Advances in Chemical Engineering     Full-text available via subscription   (Followers: 26)
Advances in Chemical Engineering and Science     Open Access   (Followers: 55)
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: 11)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 12)
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: 8)
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: 8)
ChemBioEng Reviews     Full-text available via subscription   (Followers: 1)
Chemical and Engineering News     Free   (Followers: 13)
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: 45)
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: 20)
Chemical Papers     Hybrid Journal   (Followers: 2)
Chemical Product and Process Modeling     Hybrid Journal   (Followers: 4)
Chemical Reviews     Full-text available via subscription   (Followers: 186)
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: 258)
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: 21)
Corrosion Engineering, Science and Technology     Hybrid Journal   (Followers: 37)
Corrosion Reviews     Hybrid Journal   (Followers: 6)
Crystal Research and Technology     Hybrid Journal   (Followers: 6)
Current Opinion in Chemical Engineering     Open Access   (Followers: 7)
Designed Monomers and Polymers     Open Access   (Followers: 2)
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: 133)
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: 7)
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: 5)
Journal of Chemical Sciences     Partially Free   (Followers: 22)
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   (Followers: 1)
Journal of Crystallization Process and Technology     Open Access   (Followers: 8)
Journal of Environmental Chemical Engineering     Hybrid Journal   (Followers: 7)
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: 308)
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: 2)
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: 2)
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: 154)
Polymer Bulletin     Hybrid Journal   (Followers: 7)
Polymer Composites     Hybrid Journal   (Followers: 16)
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: 4)
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  [2352 journals]
  • Dualistic distribution coefficients of trace elements in the system
           mineral–hydrothermal solution. IV. Platinum and silver in pyrite
    • Authors: V. L. Tauson; S. V. Lipko; K. Yu. Arsent’ev; Yu. L. Mikhlin; D. N. Babkin; N. V. Smagunov; T. M. Pastushkova; I. Yu. Voronova; O. Yu. Belozerova
      Pages: 753 - 774
      Abstract: Abstract The FeS2–Ag–Pt–As system was studied using hydrothermal thermogradient synthesis (with internal sampling) of pyrite crystals at a temperature of 500°C and pressure of 1 kbar in ammonium chloridebased solutions. The modes of occurrence of precious metals (PM) were determined using atomic absorption spectrometry (AAS) in its version of statistical selections of analytical data on single crystals (SSADSC), electron microprobe analysis (EMPA), scanning electron microscopy with energy-dispersive spectrometry (SEM-EDS), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). The concentration of Pt in its structural mode in pyrite is as high as 10–11 ppm and is practically not correlated with the As concentration. The dualistic distribution coefficient of Pt between pyrite and hydrothermal solution is 21 ± 7 for the structural mode and 210 ± 80 for the surface-related mode of this element. No inclusions of either any Pt-bearing minerals or Pt itself was detected. Platinum is an element highly compatible with hydrothermal pyrite and is different in this sense from gold, and pyrite is underestimated as a potential concentrator of platinumgroup elements (PGE). The distribution of Ag in pyrite is highly heterogeneous. The likely reason for this is that the Ag solid solution cannot be quenched, and hence, the Ag concentrations broadly vary and are very unsystematically distributed in natural pyrite crystals. Assuming this hypothesis, the limit for Ag accommodation in FeS2 can be estimated using SSADSC at 0.09 ± 0.06 wt % under the experimental parameters, and the distribution coefficient of the structural Ag mode is thereby evaluated at 1400 ± 700. When crystallizing together with FeS2 proustite (Ag3AsS3) near its melting point, forms mixtures with dervillite (Ag2AsS2), in which Ag deficit is counterbalanced by excess divalent As. The limit of As incorporation into pyrite under these conditions is ≤0.1 wt %. SEM-EDS and XPS data indicate that the surface phases are of three types. In the course of crystal growth, practically two-dimensional nonautonomous phases (NP) are aggregated into submicroscopic and micrometer-sized crystalline bodies (mesocrystals) that largely inherit their unusual minor-element composition from NP and are enriched in Ag, Pt, As, and other minor elements. NP and mesocrystals are enriched in Al, which was transferred into them from the Al-bearing Ti alloy of the reaction containers. Silver occur in the volume of the crystals and on their surface as monovalent silver sulfide. Arsenic was detected mostly in the form of di- and trivalent arsenic sulfides. Pentavalent arsenic oxide was identified only on the surface of the crystals and can be easily eliminated by ion milling.
      PubDate: 2017-09-01
      DOI: 10.1134/s0016702917090105
      Issue No: Vol. 55, No. 9 (2017)
       
  • Evolution of the Kerguelen plume and its impact upon the continental and
           oceanic magmatism of East Antarctica
    • Authors: N. M. Sushchevskaya; B. V. Belyatsky; E. P. Dubinin; O. V. Levchenko
      Pages: 775 - 791
      Abstract: Abstract Petrological–geochemical study showed that the alkaline-ultramafics of the Jetty Oasis (rift zone of the Lambert glacier, East Antarctica) are similar in the age (117–110 Ma) and geochemistry to the ultrapotassic alkali basalts of eastern India (Jharia and Raniganj intrusions). Alkaline magmatism in India and Antarctica is related to the activity of the Kerguelen plume, which significantly affected the evolution of the entire eastern Indian Ocean, in particular, determined geodynamic peculiarities of the ocean opening (existence of non-spreading blocks, fragments of the Gondwana lithosphere in oceanic areas) and geochemical characteristics of erupted tholeiitic magmas. Enriched magma sources related to the Kerguelen plume were formed by melting of ancient Gondwana-derived continental fragments, which experienced multiple transformations during its evolution up to the formation of metasomatized mantle under the impact of the Kerguelen plume on the Antarctic and India margins.
      PubDate: 2017-09-01
      DOI: 10.1134/s0016702917090099
      Issue No: Vol. 55, No. 9 (2017)
       
  • First data on late vendian granitoid magmatism of the Northwestern
           Sayan–Yenisei accretionary belt
    • Authors: A. D. Nozhkin; I. I. Likhanov; T. B. Bayanova; P. A. Serov
      Pages: 792 - 801
      Abstract: Abstract Late Vendian (540–550 Ma) U–Pb age was established for zircon from postcollisional granites of the Osinovsky Massif located among island-arc complexes of the Isakovka terrane in the northwestern Sayan–Yenisei accretionary belt. The granites were formed 150 Ma after the formation of the host island-arc complexes and 50–60 Ma after the beginning of their accretion to the Siberian Craton. These events mark the final stage of the Neoproterozoic history of the Yenisei Ridge related to the end of accretion of oceanic fragments and the beginning of the Caledonian Orogeny. The granites are subalkaline leucoractic Na–K rocks enriched in Rb, U, and Th. The petrogeochemical and Sm–Nd isotope data (TNd(DM)-2st = 1490–1650 Ma and εNd(T) from–2.5 to–4.4) indicate that their source was highly differentiated continental crust of the SW margin of the Siberian Craton. Therefore, the host Late Riphean island-arc complexes were thrust over the craton margin for distance significantly exceeding the size of the Osinovsky Massif.
      PubDate: 2017-09-01
      DOI: 10.1134/s0016702917070072
      Issue No: Vol. 55, No. 9 (2017)
       
  • Molecular and structural-group characteristics of hydrocarbons in Late
           Devonian oils of the Timan–Pechora Province
    • Authors: D. A. Bushnev; M. B. Smirnov; N. S. Burdel’naya; O. V. Valyaeva
      Pages: 802 - 813
      Abstract: Abstract The paper presents gaz chromatography–mass spectrometry and 1H- and 13C-NMR data on the composition of hydrocarbon markers and structural-group composition of oils in the Timan–Pechora oil and gas province. The set of samples is subdivided into groups whose oils differ in composition and the distribution of their polycyclic biomarkers. All of the oils show closely similar geochemical characteristics, types of their source organic matter, and thermal maturity. Comparison of oil characteristics (composition of the polycyclic biomarkers) and parameters determined by chromatography–mass spectrometry makes it possible to reveal certain important (and calling for further investigation) relations between the composition of the structural groups of hydrocarbons in the oil fluid and its geochemical characteristics.
      PubDate: 2017-09-01
      DOI: 10.1134/s001670291708002x
      Issue No: Vol. 55, No. 9 (2017)
       
  • Thermodynamic study of calcic amphiboles
    • Authors: L. P. Ogorodova; I. A. Kiseleva; M. F. Vigasina; L. V. Mel’chakova; I. A. Bryzgalov; D. A. Ksenofontov
      Pages: 814 - 821
      Abstract: Abstract The paper reports original thermochemical data on six natural amphibole samples of different composition. The data were obtained by high-temperature melt solution calorimetry in a Tian–Calvet microcalorometer and include the enthalpies of formation from elements for actinolite Ca1.95(Mg4.4Fe 0.5 2+ Al01)[Si8.0O22](OH)2(–12024 ± 13 kJ/mol) and Ca2.0(Mg2.9Fe 1.9 2+ Fe 0.2 3+ )[Si7.8Al0.2O22](OH)2, (–11462 ± 18 kJ/mol), and Na0.1Ca2.0(Mg3.2Fe 1.6 2+ Fe 0.2 3+ )[Si7.7Al0.3O22](OH)2 (–11588 ± 14 kJ/mol); for pargasite Na0.5K0.5Ca2.0-(Mg3.4Fe 1.8 2+ Al0.8)[Si6.2Al1.8O22](OH)2 (–12316 ± 10 kJ/mol) and Na0.8K0.2Ca2.0(Mg2.8Fe 1.3 3+ Al0.9) [Si6.1Al1.9O22](OH)2 (–12 223 ± 9 kJ/mol); and for hastingsite Na0.3K0.2Ca2.0(Mg0.4Fe 1.3 2+ Fe 0.9 3+ Al0.2) [Si6.4Al1.6O22](OH)2 (‒10909 ± 11 kJ/mol). The standard entropy, enthalpy, and Gibbs free energy of formation are estimated for amphiboles of theoretical composition: end members and intermediate members of the isomorphic series tremolite–ferroactinolite, edenite–ferroedenite, pargasite–ferropargasite, and hastingsite.
      PubDate: 2017-09-01
      DOI: 10.1134/s0016702917080067
      Issue No: Vol. 55, No. 9 (2017)
       
  • Europium anomaly variation under low-temperature water-rock interaction: A
           new thermometer
    • Authors: R. Nakada; T. Shibuya; K. Suzuki; Y. Takahashi
      Pages: 822 - 832
      Abstract: Abstract The positive europium (Eu) anomaly, enrichment of Eu abundance relative to the neighboring elements, is often observed for water interacted with the rocks. Not only high temperature (~400°C) water-rock interaction such as seafloor hydrothermal fluids, but also relatively lower temperature interaction, less than 100°C, cause positive Eu anomaly. However, relationship between the degree of Eu anomaly and interaction temperature has not been investigated. Water-rock interaction experiments at three different reaction temperatures were performed in this study to reveal the cause of positive Eu anomaly. Comparison of the results under different solution chemistry and temperature conditions showed that the basalt containing plagioclase released larger abundances of REEs than the basaltic glass. The degree of Eu anomaly assessed by Eu/Eu* value was smaller when 0.7 M NaCl solution was used for liquid phase for both solid phases. On the other hand, the Eu/Eu* became larger with increasing reaction temperature for basalts interacted with ultra-pure water. Therefore, it is suggested that the Eu anomaly is potentially used as a fluid-rock interaction thermometer under low salinity condition.
      PubDate: 2017-09-01
      DOI: 10.1134/s001670291709004x
      Issue No: Vol. 55, No. 9 (2017)
       
  • Crystallization temperature of anatectic melt: An example of
           biotite–muscovite granite in the Rikolatvi structure, Belomorian Mobile
           Belt
    • Authors: T. F. Shcherbakova
      Pages: 833 - 839
      Abstract: Abstract Zircon hosted in granite, which crystallized from local pools of anatectic melt among migmatites, in the Rikolatvi structure, Belomorian Mobile Belt, contains minute inclusions of various minerals, biotite and garnet among others. The compositions of the biotite and garnet in the microinclusions differ from those of the same minerals in the granite containing the zircon. The crystallization temperature of the anatectic melt was estimated by the biotite–garnet geothermometer and the composition of the biotite and garnet inclusions at ~800°C.
      PubDate: 2017-09-01
      DOI: 10.1134/s0016702917080080
      Issue No: Vol. 55, No. 9 (2017)
       
  • Age of zircon from apoharzburgite serpentinite representing mantle of the
           Uralian paleoocean
    • Authors: G. B. Fershtater; P. Montero; F. Bea
      Pages: 675 - 682
      Abstract: Abstract Over 60 zircon grains from apoharzburgite serpentinite were dated using SHRIMP–IIe/mc at the Laboratory IBERSIMS of the Granada University (Spain). The apoharzburgite serpentinite represents an oceanic mantle of the Uralian paleoocean, which was exhumed in the crustal structures of the Paleozoic Ural Mobile Belt during obduction. Individual grains span a huge 206Pb/238U age range from 2740 to 250 Ma and are clustered into six discrete age groups (in Ma): (I) > 2500, (II) 2500–1950, (III) 1260–1210, (IV) 480–400, (V) 370–330, and (VI) < 280. Two last groups were formed under the effect of granitoids on serpentinites. The traces of this effect were studied in outcrops and confirmed by age of zircon from contact talc–carbonate rock. The morphologies of zircon crystals from serpentinite bear signs typical of both magmatic and metamorphic varieties, which indicate their polygenetic–polychronous nature. No striking morphological features and peculiar U and Th contents were found in the studied zircons to discriminate unambiguously between different age groups. Pre-Paleozoic events with ages of groups I–III were found in zircons from many oceanic mantle rocks. The similarity of age groups of zircons from Paleozoic and modern oceanic lithosphere is caused by global mantle reworkings, which provoke magma generation and metasomatism probably accompanied by zircon crystallization.
      PubDate: 2017-08-01
      DOI: 10.1134/s0016702917080031
      Issue No: Vol. 55, No. 8 (2017)
       
  • Composition and geodynamic setting of Late Paleozoic magmatism of Chukotka
    • Authors: M. V. Luchitskaya; B. V. Belyatsky; E. A. Belousova; L. M. Natapov
      Pages: 683 - 710
      Abstract: Abstract The paper reports the results of petrogeochemical and isotope (Sr-Nd-Pb-Hf) study of the Late Paleozoic granitoids of the Anyui–Chukotka fold system by the example of the Kibera and Kuekvun massifs. The age of the granitoids from these massifs and granite pebble from conglomerates at the base of the overlying Lower Carboniferous rocks is within 351–363 Ma (U-Pb, TIMS, SIMS, LA-MC-ICP-MS, zircon) (Katkov et al., 2013; Luchitskaya et al., 2015; Lane et al., 2015) and corresponds to the time of tectonic events of the Ellesmere orogeny in the Arctic region. It is shown that the granitoids of both the massifs and granite pebble are ascribed to the I-type granite, including their highly differentiated varieties. Sr-Nd-Pb-Hf isotope compositions of the granitoids indicate a contribution of both mantle and crustal sources in the formation of their parental melts. The granitic rocks of the Kibera and Kuekvun massifs were likely formed in an Andean-type continental margin setting, which is consistent with the inferred presence of the Late Devonian–Early Carboniferous marginal-continental magmatic arc on the southern Arctida margin (Natal’in et al., 1999). Isotope data on these rocks also support the idea that the granitoid magmatism was formed in a continental margin setting, when melts derived by a suprasubduction wedge melting interacted with continental crust.
      PubDate: 2017-08-01
      DOI: 10.1134/s0016702917080043
      Issue No: Vol. 55, No. 8 (2017)
       
  • Proof of formation of organic matter in upper Devonian carbonate and
           carbonate-siliceous sediments of the South-Tatar uplift in constant photic
           layer anoxia
    • Authors: E. N. Poludetkina; M. B. Smirnov; N. P. Fadeeva; E. V. Kozlova
      Pages: 726 - 736
      Abstract: Abstract Samples of carbonate and siliceous-carbonate deposits of Semiluk—Sargaev horizons of the N‒NE slope of the South Tatar uplift, Volga-Ural petroliferous basin, have been studied. Specific feature of the source rocks—high concentration of compounds—anoxia testifiers in the photic layer has been identified. That is, organic matter has been deposited under the conditions of the constant presence of anoxia in the photic layer of the sedimentation basin at sufficiently high thickness of the water column contaminated with hydrogen sulfide. Since by the composition of saturated hydrocarbons the studied samples are typical for deposits of the Semiluk horizon of the central part of the Volga-Ural basin, we can assume a fairly wide prevalence of such conditions within the South-Tatar arch. Changes in the concentrations of the components—anoxia markers—show cyclical changes in output layer contaminated with hydrogen sulfide or its bioproduction within the studied time.
      PubDate: 2017-08-01
      DOI: 10.1134/s0016702917080079
      Issue No: Vol. 55, No. 8 (2017)
       
  • Accumulation of polycyclic aromatic hydrocarbons in hummocky tundra
           peatlands under climate change at high latitudes
    • Authors: D. N. Gabov; V. A. Beznosikov; E. V. Yakovleva
      Pages: 737 - 751
      Abstract: Abstract The quantitative and qualitative compositions of polycyclic aromatic hydrocarbons (PAHs) were determined, and the vertical stratification of PAHs was characterized along profiles in hummocky tundra peatlands. In perennially frozen peat layers, PAHs occur in a conserved state and do not undergo transformation in contrast to seasonally thawed layers. Statistically significant correlations were detected between the mass fraction of 5–6-ring structures (especially, benzo[ghi]perylene), individual PAHs, and botanical composition of the peat at the thawing–freezing boundary; and profile relations for various combinations of PAHs were calculated. The radiocarbon and paleobotanical analysis of peatlands in combination with the obtained results can be used for assignment of initial vegetation to periods of peat formation in the Holocene and as markers of the response of the peatland permafrost to climate changes at high latitudes.
      PubDate: 2017-08-01
      DOI: 10.1134/s0016702917060039
      Issue No: Vol. 55, No. 8 (2017)
       
  • Evolution of biogeochemical cycles under anthropogenic loads: Limits
           impacts
    • Authors: T. I. Moiseenko
      Pages: 841 - 860
      Abstract: Abstract Human activities pathogenically modify biogeochemical cycles via introducing vast amounts of chemical elements and compounds into biotic cycles and inducing evolutionary transformations of the organic world of the biosphere. The adverse phenomena develop cascadewise, as is illustrated by the increase in the content of carbon dioxide and acid-forming compounds, enrichment of aquatic environments by metals, and pollution with persistent organic pollutants and biogenic elements. Analogies with the past are utilized to estimate the possible implications of the evolution of anthropogenically induced processes. The organic world is proved to react to anthropogenic impacts by means of active microevolutionary processes. The key reaction mechanisms of organisms and transformations of populations and ecosystems under the modified conditions are demonstrated. A review of literature data is used to show how anthropogenic emissions of CO2, NOx, P, toxic compounds and elements increases on a global scale, and how ocean acidification, eutrophication, water withdrawal, etc. are simultaneously enhanced. The methodology of estimating anthropogenic loads is discussed as a scientifically grounded strategy of minimizing anthropogenic impacts on natural ecosystems.
      PubDate: 2017-10-01
      DOI: 10.1134/s0016702917100081
      Issue No: Vol. 55, No. 10 (2017)
       
  • Combined assessment of the ecological and geochemical state of
           anthropogenically impacted areas
    • Authors: E. M. Korobova
      Pages: 861 - 871
      Abstract: Abstract Based on the theoretical principles of biogeochemistry and evolutionary ecology, the geochemical structure of the modern noosphere was evaluated, and a method was developed for the combined assessment of the ecological and geochemical state of large anthropogenically impacted areas. It was demonstrated that persistent geochemically-induced endemic diseases are direct consequences of the development of human civilization. It was shown by the example of the iodine natural–anthropogenic province that the risk map of geochemically-induced endemic diseases constructed by overlaying map surfaces adequately reflects the modern ecological and geochemical state in any point of the region of interest. The proposed approach is valid for the solution of a wide range of environmental geochemical problems.
      PubDate: 2017-10-01
      DOI: 10.1134/s0016702917100068
      Issue No: Vol. 55, No. 10 (2017)
       
  • A.P. Vinogradov’s concept of biogeochemical provinces and its
           development
    • Authors: V. V. Ermakov
      Pages: 872 - 886
      Abstract: Abstract This paper addresses the concept of biogeochemical provinces introduced by A.P. Vinogradov and developed by V.V. Kovalsky and other researchers. The importance of this scientific direction was emphasized in the context of the anthropogenic impact on the biosphere. The most general characteristics, genesis, and evolution of biogeochemical provinces were discussed. Special attention was given to modern natural–anthropogenic biogeochemical provinces and anomalies. It was pointed out that this modern and vitally important scientific direction should be further pursued.
      PubDate: 2017-10-01
      DOI: 10.1134/s0016702917100044
      Issue No: Vol. 55, No. 10 (2017)
       
  • Landscape–biogeochemical factors of transformation of the Cs-137
           contamination field in the Bryansk region
    • Authors: V. G. Linnik; I. V. Mironenko; N. I. Volkova; A. V. Sokolov
      Pages: 887 - 901
      Abstract: Abstract Data are presented on the distribution of Chernobyl-derived 137Cs in different landscapes of the Bryansk region. The role of different landscape-biogeochemical factors in the transformation of the 137Cs contamination field is examined. The distribution of 137Cs in the typical soil catenary junction of predpolessie, predopolje, and opolje landscapes is analyzed. The role of biogeochemical barriers in the 137Cs accumulation is considered. It is revealed that the slope exposure affects the intensity of geochemical migration. In particular, the intensity of lateral migration of 137Cs on the slopes of the southern and southwestern exposure is much higher than that on the slopes of the northern and northeastern exposure. The different types of geochemical lateral structure of landscape are analyzed on the basis of the catenary 137Cs distribution.
      PubDate: 2017-10-01
      DOI: 10.1134/s001670291710007x
      Issue No: Vol. 55, No. 10 (2017)
       
  • Biogeochemical indication: Current state and development outlooks
    • Authors: S. F. Tyutikov
      Pages: 902 - 910
      Abstract: Abstract The paper presents analysis of the current state of the biogeochemical indication of the status of heavy metals and vital trace elements in various environmental objects in relation to physiological reactions of organisms. Aspects of the application of different methods of phyto- and zooindications are assessed, and integral techniques are reviewed that are based on the use of homogeneous living matter and molecular biogeochemical markers for the purposes of ecological monitoring of the environment at various anthropogenic impacts.
      PubDate: 2017-10-01
      DOI: 10.1134/s001670291710010x
      Issue No: Vol. 55, No. 10 (2017)
       
  • Formation of organic substances of humus nature and their biospheric
           properties
    • Authors: M. I. Dinu
      Pages: 911 - 926
      Abstract: Abstract Hypotheses of humus formation on the basis of polymerization and oxidation reactions were considered. The most popular models of several authors and the general understanding of the structural features of natural polymers were analyzed. Multivariate statistical analysis was performed for zonal factors affecting the formation of humic substances. Evolutionary changes in the understanding of the biospheric functions of humus substances were evaluated. Statistical procedures were proposed for the prediction of the physicochemical behavior of humus substances in environments.
      PubDate: 2017-10-01
      DOI: 10.1134/s0016702917100032
      Issue No: Vol. 55, No. 10 (2017)
       
  • Essential elements in the organs and tissues of fish depending on the
           freshwater toxicity and physiological state
    • Authors: N. A. Gashkina
      Pages: 927 - 934
      Abstract: Abstract The distribution of essential elements (Са, Mg, Na, K, Zn, Cu, Mn, Co) in organs and tissues in basins with different water toxicity is considered by the example of bream Abramis brama L. The models of redistribution of essential elements in the liver and kidney of the fish are developed depending on the physiological state, which is estimated by the concentration of hemoglobin in blood, total disease, and body mass index. It is shown that essential elements can serve as markers of intensity and direction of metabolic processes in the fish organism.
      PubDate: 2017-10-01
      DOI: 10.1134/s0016702917100056
      Issue No: Vol. 55, No. 10 (2017)
       
  • Environmental geochemistry of mercury in the area of emissions of the
           Karabashmed copper smelter
    • Authors: Yu. G. Tatsii; V. N. Udachin; P. G. Aminov
      Pages: 935 - 945
      Abstract: Abstract Mercury emissions during production of blister copper at the smelter Karabashmed are roughly estimated. The high mercury content in the atmospheric dust, soils, lake sediments of the Karabash geotechnogenic system shows that emissions of the plant are the main source of environmental contamination. The mercury content in soils of residential territory ranges within 0.2–11.4 mg/kg, reaching 15 mg/kg in soils of the impact zone. The maximum mercury content in the bottom sediments of Lake Serebry is 32 mg/kg. The high degree of contamination by other elements of emissions (Cu, Pb, Zn, As, Cd) is also demonstrated. Obtained results justify the need for the instrumental control of mercury in emissions.
      PubDate: 2017-10-01
      DOI: 10.1134/s0016702917100093
      Issue No: Vol. 55, No. 10 (2017)
       
  • Biogeochemical cycles in tundra ecosystems in areas impacted by gas
           industry facilities
    • Authors: V. N. Bashkin
      Pages: 946 - 956
      Abstract: Abstract Data acquired by monitoring modern biogeochemical cycles in tundra ecosystems in zones impacted by facilities of the gas industry indicate the absence of any perceptible changes in the system surface water–bottom sediments–soil–plants and show that the emitted nitrogen oxides beneficially affect productivity of the lichens and the functioning of the tundra ecosystem as a whole.
      PubDate: 2017-10-01
      DOI: 10.1134/s0016702917100020
      Issue No: Vol. 55, No. 10 (2017)
       
 
 
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