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  Subjects -> ENGINEERING (Total: 2383 journals)
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CHEMICAL ENGINEERING (204 journals)                  1 2 | Last

Showing 1 - 200 of 204 Journals sorted alphabetically
AATCC Journal of Research     Full-text available via subscription   (Followers: 8)
ACS Sustainable Chemistry & Engineering     Hybrid Journal   (Followers: 6)
Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials     Hybrid Journal   (Followers: 6)
Acta Polymerica     Hybrid Journal   (Followers: 10)
Additives for Polymers     Full-text available via subscription   (Followers: 22)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 9)
Advanced Chemical Engineering Research     Open Access   (Followers: 38)
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: 27)
Advances in Chemical Engineering and Science     Open Access   (Followers: 66)
Advances in Polymer Technology     Hybrid Journal   (Followers: 14)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 7)
American Journal of Polymer Science & Engineering     Open Access  
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: 12)
Anti-Corrosion Methods and Materials     Hybrid Journal   (Followers: 11)
Applied Petrochemical Research     Open Access   (Followers: 3)
Asia-Pacific Journal of Chemical Engineering     Hybrid Journal   (Followers: 8)
Biochemical Engineering Journal     Hybrid Journal   (Followers: 15)
Biofuel Research Journal     Open Access   (Followers: 4)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Brazilian Journal of Chemical Engineering     Open Access   (Followers: 4)
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: 9)
ChemBioEng Reviews     Full-text available via subscription   (Followers: 1)
ChemEngineering     Open Access  
Chemical and Engineering News     Free   (Followers: 18)
Chemical and Materials Engineering     Open Access   (Followers: 18)
Chemical and Petroleum Engineering     Hybrid Journal   (Followers: 13)
Chemical and Process Engineering     Open Access   (Followers: 33)
Chemical and Process Engineering Research     Open Access   (Followers: 30)
Chemical Engineering & Technology     Hybrid Journal   (Followers: 31)
Chemical Engineering and Processing: Process Intensification     Hybrid Journal   (Followers: 16)
Chemical Engineering and Science     Open Access   (Followers: 26)
Chemical Engineering Communications     Hybrid Journal   (Followers: 14)
Chemical Engineering Education     Full-text available via subscription   (Followers: 1)
Chemical Engineering Journal     Hybrid Journal   (Followers: 54)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 26)
Chemical Engineering Research Bulletin     Open Access   (Followers: 17)
Chemical Engineering Science     Hybrid Journal   (Followers: 28)
Chemical Geology     Hybrid Journal   (Followers: 25)
Chemical Papers     Hybrid Journal   (Followers: 2)
Chemical Product and Process Modeling     Hybrid Journal   (Followers: 4)
Chemical Reviews     Full-text available via subscription   (Followers: 187)
Chemical Society Reviews     Full-text available via subscription   (Followers: 43)
Chemical Technology     Open Access   (Followers: 22)
ChemInform     Hybrid Journal   (Followers: 8)
Chemistry & Industry     Hybrid Journal   (Followers: 6)
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry of Materials     Full-text available via subscription   (Followers: 253)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 14)
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: 11)
Computer Aided Chemical Engineering     Full-text available via subscription   (Followers: 1)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 10)
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 Applied Polymer Science     Hybrid Journal   (Followers: 1)
Current Environmental Engineering     Hybrid Journal  
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: 43)
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)
Food and Environment Safety     Open Access  
Frontiers of Chemical Science and Engineering     Hybrid Journal   (Followers: 3)
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)
Hemijska Industrija     Open Access  
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: 9)
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 Engineering     Open Access   (Followers: 7)
International Journal of Chemical Reactor Engineering     Hybrid Journal   (Followers: 2)
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)
Iranian Journal of Polymer Science and Technology     Open Access   (Followers: 1)
Journal of Chemical Engineering & Process Technology     Open Access   (Followers: 5)
Journal of Applied Crystallography     Hybrid Journal   (Followers: 7)
Journal of Applied Electrochemistry     Hybrid Journal   (Followers: 13)
Journal of Applied Polymer Science     Hybrid Journal   (Followers: 140)
Journal of Applied Science & Process Engineering     Open Access  
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: 27)
Journal of Chemical Engineering and Materials Science     Open Access   (Followers: 4)
Journal of Chemical Science and Technology     Open Access   (Followers: 6)
Journal of Chemical Sciences     Partially Free   (Followers: 22)
Journal of Chemical Technology & Biotechnology     Hybrid Journal   (Followers: 9)
Journal of Chemical Theory and Computation     Full-text available via subscription   (Followers: 17)
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     Open Access   (Followers: 1)
Journal of Inorganic and Organometallic Polymers and Materials     Partially Free   (Followers: 10)
Journal of Materials Science and Chemical Engineering     Open Access   (Followers: 1)
Journal of Modern Chemistry & Chemical Technology     Open Access   (Followers: 3)
Journal of Molecular Catalysis A: Chemical     Hybrid Journal   (Followers: 7)
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: 4)
Journal of Polymer and Biopolymer Physics Chemistry     Open Access   (Followers: 7)
Journal of Polymer Engineering     Hybrid Journal   (Followers: 11)
Journal of Polymer Research     Hybrid Journal   (Followers: 7)
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: 334)
Journal of the Bangladesh Chemical Society     Open Access  
Journal of the Brazilian Chemical Society     Open Access   (Followers: 3)
Journal of The Institution of Engineers (India) : Series E     Hybrid Journal   (Followers: 2)
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: 17)
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  
MRS Communications     Hybrid Journal  
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     Open Access   (Followers: 1)
Plasma Processes and Polymers     Hybrid Journal   (Followers: 3)
Plasmas and Polymers     Hybrid Journal  
Polymer     Hybrid Journal   (Followers: 140)
Polymer Bulletin     Hybrid Journal   (Followers: 8)
Polymer Composites     Hybrid Journal   (Followers: 17)
Polyolefins Journal     Open Access  
Powder Metallurgy Progress     Unknown   (Followers: 1)
Powder Technology     Hybrid Journal   (Followers: 13)
Recent Innovations in Chemical Engineering     Hybrid Journal  
Recyclable Catalysis     Open Access   (Followers: 1)
Research on Chemical Intermediates     Hybrid Journal  
Reviews in Chemical Engineering     Hybrid Journal   (Followers: 5)
Revista Cubana de Química     Open Access  
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: 5)
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: 3)

        1 2 | Last

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  [2350 journals]
  • Carbonate–Silicate–Sulfide Polyphase Inclusion in Diamond from the
           Komsomolskaya Kimberlite Pipe, Yakutia
    • Authors: A. M. Logvinova; R. Wirth; D. A. Zedgenizov; L. A. Taylor
      Pages: 283 - 291
      Abstract: An aragonite inclusion in natural diamond was identified using techniques of transmission electron microscopy, electron microdiffraction, and microprobe analysis. The inclusion is hosted in a colorless octahedral diamond crystal from the Komslomolskaya pipe in Yakutia. The diamond crystal shows a zoned distribution of its admixtures and defects. The structure parameters of the inclusion (∠[001]/[201] = 66° and certain lattice spacings) correspond to the calculated parameters of the orthorhombic unit cell of a Ca carbonate polymorph. The aragonite inclusion contains admixtures of MgO (0.81), MnO (0.58), and FeO (0.13 wt %). The find of a syngenetic aragonite inclusion in diamond is unique and proves that diamond can be formed in carbonatized mantle peridotite at depths of at least 300 km. The inclusion hosts identifiable microphases of Ni-rich sulfides (37–41 wt % Ni), titanite, hydrous silicate, magnetite, and fluid. This association indicates that the diamond and aragonite crystallized from a carbonate–silicate–sulfide melt or highdensity fluid.
      PubDate: 2018-04-01
      DOI: 10.1134/s0016702918040079
      Issue No: Vol. 56, No. 4 (2018)
       
  • Geochemistry, Tectonic Settings, and Age of Metavolcanic Rocks of the
           Isakovskii Terrane, Yenisei Range: Indicators of the Early Evolution of
           the Paleo-Asian Ocean
    • Authors: I. I. Likhanov; A. D. Nozhkin
      Pages: 292 - 303
      Abstract: The geodynamic nature of the Late Neoproterozoic island-arc dacites (691 ± 8.8 Ma) and rift basalts (572 ± 6.5 Ma) of the Kiselikhinskaya Formation, Kutukasskaya Group, in the Isakovskii terrane is inferred from geochemical data and U–Pb zircon (SHRIMP-II) dates. The volcanic rocks were produced during the late evolutionary history of the Yenisei Range, starting at the origin of oceanic crustal fragments and their accretion to the Siberian craton to the postaccretionary crustal extension and the onset of the Caledonian orogenesis. The reproduced sequence of geological processes marks the early evolution of the Paleo- Asian Ocean in its junction zone with the Siberian craton. The data refine the composition and age of volcanic rocks in the trans-Angara part of the Yenisei Range and specifics of the Neoproterozoic evolution of the Sayan–Yenisei accretionary belt.
      PubDate: 2018-04-01
      DOI: 10.1134/s0016702918040067
      Issue No: Vol. 56, No. 4 (2018)
       
  • Facies Structure and Quantitative Parameters of Pleistocene Sediments of
           the Bering Sea
    • Authors: M. A. Levitan; T. N. Gelvi; K. V. Syromyatnikov; K. D. Chekan
      Pages: 304 - 317
      Abstract: Lithofacies zoning is described for the first time for the Neo- and Eopleistocene of the Bering Sea. Four lithofacies sedimentation zones are distinguished: (I) terrigenous; (II) siliceous–terrigenous; (III) siliceous, and (IV) volcanoterrigenous ones. Corresponding maps were treated using Ronov volumetric method to quantify sedimentation parameters for distinguished lithofacies zones (subzones) and types of Pleistocene sediments. It was revealed that terrigenous sediments predominate over other sediments. Accumulation of the terrigenous sediments was more intense (by 1.4 times) in the Neopleistocene than in the Eopleistocene. The sedimentation rate of siliceous sediments of the Bowers Ridge in the Eopleistocene was two times higher than in the Neopleistocene.
      PubDate: 2018-04-01
      DOI: 10.1134/s0016702918040055
      Issue No: Vol. 56, No. 4 (2018)
       
  • Biogeochemical Differentiation of Living Matter and Biodiversity in the
           Ardon Polymetallic Subregion of the Biosphere
    • Authors: V. V. Ermakov; S. F. Tyutikov; A. P. Degtyarev; V. A. Safonov; V. N. Danilova; S. D. Khushvakhtova; U. A. Gulyaeva; E. V. Krechetova
      Pages: 318 - 331
      Abstract: Specific responses of plants and animals to changes in the contents of microelements (Pb, Cd, Cu, Zn, As, Se, etc.) in abiotic environmental components of the Ardon River Basin (North Ossetia) were studied by new biogeochemical indication methods. In comparison to background areas, a local increase in the Pb, Cd, Cu, Zn, and As contents in soils and organisms occurs under the impact of natural and technogenic factors. The heavy metal contents in Ardon River water are generally within hygienic norms. Activation of sulfurcontaining synthesis in the leaves of willow, sea buckthorn, and coltsfoot was revealed for the maximum heavy metal content in soils. On plots adjacent to the Unal tailing dump, the contents of pigments and their proportions in leaves of coltsfoot, dandelion, and willow do not differ from those in less contaminated areas. On technogenic plots, the species richness of plants decreases, as well as the mowed biomass and projective cover of herbaceous plants (to 40%); inhibition of plant growth, chlorosis, necrosis, and lamina deformation are observed. A new metallophyte species (Cladochaeta candidissima M. Bieb.) was revealed. The increase in lead and arsenic contents in soils and plants of the Ardon floodplain is accompanied by an increase in their concentrations in the blood and hair of animals.
      PubDate: 2018-04-01
      DOI: 10.1134/s001670291804002x
      Issue No: Vol. 56, No. 4 (2018)
       
  • Mercury in Hydrobionts and Their Habitat in Grønfjorden, West
           Spitsbergen, in Early Springtime
    • Authors: N. V. Lebedeva; O. L. Zimina; N. N. Fateev; A. L. Nikulina; I. V. Berchenko; N. I. Meshcheryakov
      Pages: 332 - 343
      Abstract: The first data were obtained on the total mercury content in hydrobionts and their habitat in Grønfjorden, Spitsbergen, at the waste discharge sites of the settlement of Barentsburg in early spring 2017. The Hg concentration was below the detection limit in the water and varied from 7.1 to 42.3 ng/g of dry weight in the bottom sediments. Mercury concentration in the hydrobionts increased toward the inner fjord and was higher near the mouth of the Grøndalen River, which flows into the fjord. Elevated Hg concentrations at the mouth of the Grøndalen River indicate that much of the toxic metal is brought to the inner part of the fjord with riverine runoff, and this Hg source is likely more important than the surface supply of Hg transferred from local surface pollution centers at Barentsburg. The Hg concentration depended on the position of the marine organisms in the trophic chain and was the highest in the detritophage mollusks Thyasira gouldi, Cardium sp., and Macoma calcarea, the specialized predatory sea snail Cryptonatica affinis, and the cod Gadus morhua, which is a benthosophage–secondary predator. The total Hg concentrations in the hydrobionts and their habitat in Grønfjorden were generally relatively low and close to the background one.
      PubDate: 2018-04-01
      DOI: 10.1134/s0016702918040031
      Issue No: Vol. 56, No. 4 (2018)
       
  • Geochemistry of Diagenesis of Organogenic Sediments: An Example of Small
           Lakes in Southern West Siberia and Western Baikal Area
    • Authors: G. A. Leonova; A. E. Mal’tsev; V. N. Melenevskii; L. V. Miroshnichenko; L. M. Kondrat’eva; V. A. Bobrov
      Pages: 344 - 361
      Abstract: Organogenic sediments (sapropels) in lakes are characterized by a reduced type of diagenesis, during which organic compounds are decomposed, the chemical composition of the pore waters is modified, and authigenic minerals (first of all, pyrite) are formed. Pyrolysis data indicate that organic matter undergoes radical transformatons already in the uppermost sapropel layers, and the composition of this organic matter is principally different from the composition of the organic matter of the its producers. The sapropels contain kerogen, whose macromolecular structure starts to develop during the very early stages of diagenesis, in the horizon of unconsolidated sediment (0–5 cm). The main role in the diagenetic transformations of organic matter in sediments is played by various physiological groups of microorganisms, first of all, heterotrophic, which amonifying, and sulfate-reducing bacteria. SO42− and Fe2+ concentrations in the pore waters of the sediments are determined to decrease (because of bacterial sulfate reduction), while concentrations of reduced Fe and S species (pyrite) in the solid phase of the sediment, conversely, increase. Comparative analysis shows that, unlike sapropels in lakes in the Baikal area, sapropels in southern West Siberia are affected by more active sulfate reduction, which can depend on both the composition of the organic matter and the SO42− concentration in the pore waters.
      PubDate: 2018-04-01
      DOI: 10.1134/s0016702918040043
      Issue No: Vol. 56, No. 4 (2018)
       
  • Geochemistry of Sandstones from the Silurian Hanxia Formation, North
           Qilian Belt, China: Implication for Provenance, Weathering and Tectonic
           Setting
    • Authors: Qian Hou; Chuanlong Mou; Qiyu Wang; Zhiyuan Tan; Xiangying Ge; Xiuping Wang
      Pages: 362 - 377
      Abstract: The North Qilian orogenic belt is the key to figure out the evolution and assembly of Asia. The Upper Silurian Hanxia Formation which is deposited in the north area of North Qilian Orogenic Belt is of utmost important to reveal the architecture and orogenic process of the North Qilian belt. So provenance analysis of the Hanxia Formation is of significance to reveal not only that the tectonic evolution of the central orogenic belt China, but also that Paleozoic Asia plate reconstruction. The ratios of elements and some discrimination diagrams based on geochemistry indicate that felsic rocks constitute their main source rocks. The chemical index of alteration is less than 80, indicating that the source rocks are relatively fresh and of low maturity. On the Th/Sc versus Zr/Sc scatter plot, samples from Hanxia Formation occur along the magmatic compositional variation trend of rocks, indicating that the rocks did not undergo obvious sedimentary sorting and recycling. The major and trace elements discrimination diagrams imply that Hanxia Formation rocks were derived from continental island arc. Recent studies show that the North China plate subducted southwards and produced subduction-related arc magmatism along the southern margin of the North Qilian Terrane during the Silurian. Therefore, we infer that in the late Silurian period the subduction-related arc became accreted to the Central Qilian terrane to the south, forming a composite continental arc, and the North Qilian belt accumulated in a fore-arc basin.
      PubDate: 2018-04-01
      DOI: 10.1134/s0016702918040092
      Issue No: Vol. 56, No. 4 (2018)
       
  • Chemical Composition of Bottom Sediments of the Zeya and Selemdzha Rivers
           as a Reflection of Drainage Area Weathering
    • Authors: O. A. Sorokina; M. N. Gusev
      Pages: 378 - 396
      Abstract: This paper reports the results of chemical study of bottom sediments of the Zeya and Selemdzha rivers, the largest water streams of the Amur River basin. It was established that the bottom sediments are depleted in practically all analyzed major and trace elements as compared to the upper continental crust (UCC) and Post-Archean Australian Shale (PAAS). It is shown that the bottom sediments of the studied rivers are chemically close to those of the Northeastern China rivers, which is related to the similar geographical and climatic environments. Examination of major-component proportions and trace-element variations suggests that the bottom sediments of the middle reaches of the Zeya River were formed from chemically reworked sources. In contrast, the bottom sediments of the lower reaches of the Zeya and Selemdzha rivers are dominated by physically reworked rather than chemically reworked materials. It is suggested that the bottom sediments of the Zeya River downstream the mouth of the Selemdzha River were formed from material, which was supplied by the Selemdzha River and determined the main geochemical characteristics of the bottom sediments of the lower reaches of the Zeya River. This is presumably related to the fact that the upper reaches of the Selemdzha River is located mainly within the Mongol–Okhotsk fold belt, the complexes of which experienced intense tectonic shearing and brecciation. For this reason, the bottom sediments of the Selemdzha River are mainly dominated by physically reworked rather than by chemically reworked material.
      PubDate: 2018-04-01
      DOI: 10.1134/s0016702918040109
      Issue No: Vol. 56, No. 4 (2018)
       
  • Calorimetric Study of Natural Anapaite
    • Authors: L. P. Ogorodova; L. V. Melchakova; M. F. Vigasina; D. A. Ksenofontov; I. A. Bryzgalov
      Pages: 397 - 401
      Abstract: The thermochemical study of natural hydrous calcium and iron phosphate, anapaite Ca2Fe(PO4)2 · 4H2O (Kerch iron ore deposit, Crimea, Russia), was carried out using high-temperature melt solution calorimetry with a Tian-Kalvet microcalorimeter. The enthalpy of formation of the mineral from elements was obtained to be Δ f Hel°(298.15 K) =–4812 ± 16 kJ/mol. The values of the standard entropy and the Gibbs energy of anapaite formation are S°(298.15 K) = 404.2 J/K mol and Δ f Gel°(298.15 K) =–4352 ± 16 kJ/mol, respectively.
      PubDate: 2018-04-01
      DOI: 10.1134/s0016702918040080
      Issue No: Vol. 56, No. 4 (2018)
       
  • U–Pb Age and Hf–Nd–Sr Isotopic Systematics of Vein Rocks of the
           Volkovsky Massif, Middle Urals, Russia
    • Authors: E. V. Anikina; K. N. Malitch; E. A. Belousova; I. Yu. Badanina; N. G. Soloshenko; I. A. Rusin; A. V. Alekseev
      Pages: 199 - 210
      Abstract: This paper reports chemical, geochronological, and Hf–Nd–Sr isotopic-geochemical data on granite, leucogabbro, and microgabbro porphyrite vein bodies in the gabbro of the Volkovsky massif. It was proved that the vein granite and leucogabbro are genetically related to the leucogabbro–anorthosite–plagiogranite (anorthosite–granite) series of the Urals Platinum Belt. The granite was dated by U-Pb laser ablation inductively coupled plasma mass spectrometric method at 409.0 ± 2.3 Ma. The rock has 87Sr/86Sr(409 Ма) = 0.70358, high εNd(409 Ма) = 6.4–6.5, and εHf(409 Ма) ≥ 10.8. Similar values of 87Sr/86Sr(409 Ма) = 0.70370 and εNd(409 Ма) = 5.9 were obtained for the vein leucogabbro. The isotopic-geochemical data are consistent with existing concept of the formation of the leucogabbro–anorthosite–plagiogranite (anorthosite–granite) series through partial melting of the olivine gabbro. The measured 143Nd/144Nd = 0.512939 value obtained for the microgabbro porphyrite reflects their more radiogenic composition and likely a mantle source. The granite, associated leucogabbro, and microgabbro porphyrite were emplaced at the final magmatic stage in the massif evolution. This event marks the upper age boundary of the Au–Pd mineralization related to the gabbroic rocks. The vein rocks lack any signs of the mineralization. However, it is highly probable that they were sources of energy and fluid for reworking of the earlier olivine gabbro and redeposition of ore components in this rock.
      PubDate: 2018-03-01
      DOI: 10.1134/s0016702918030023
      Issue No: Vol. 56, No. 3 (2018)
       
  • First Data on the Geochemistry and Age of the Kontay Intrusion in Polar
           Siberia
    • Authors: V. A. Zaitsev; D. V. Elizarov; Ya. V. Bychkova; V. G. Senin; T. B. Baynova
      Pages: 211 - 225
      Abstract: The first ever comprehensive geochemical data on the Kontay intrusion, polar Siberia, demonstrate that the intrusion is profoundly differentiated and shows geochemical features typical of intraplate magmatism. The age of the intrusion is Early Paleozoic. The paper summarizes literature data regarded as circumstantial evidence that a large magmatic intraplate (perhaps, plume-related) province of Early Paleozoic age may occur in the northern part of the Siberian Platform, whose only component found as of now is the Kontay intrusion. The intrusion is demonstrated not to possess any precious-metal (Ag–Pd) ore potential, contrary to what was surmised previously.
      PubDate: 2018-03-01
      DOI: 10.1134/s0016702918030102
      Issue No: Vol. 56, No. 3 (2018)
       
  • Composition of Volatile Components in Mineral-Hosted Fluid Inclusions at
           Hydrothermal Deposits. Water–Rock–Gas Systems in Ore-Forming Processes
           
    • Authors: O. F. Mironova; V. B. Naumov; B. N. Ryzhenko
      Pages: 226 - 233
      Abstract: The paper presents data on the average analyzed concentrations of volatile components (CO2, CH4 and other hydrocarbons, N2, and H2S) in natural fluids producing hydrothermal Au, Sn, W, Mo, Cu, Pb, and Zn mineral deposits. Characteristics of the gas regime at these deposits are determined. Thermodynamic simulations are carried out to model how compounds with volatile components are formed when water interacts with silicic and mafic rocks within wide P–T ranges. The speciation of volatile components determined by direct analysis is in good agreement with numerical simulations of water–rock systems (for silicic and mafic rocks). More reduced species with volatile components are formed in mafic rocks.
      PubDate: 2018-03-01
      DOI: 10.1134/s0016702918030047
      Issue No: Vol. 56, No. 3 (2018)
       
  • Li-Tosudite: X-Ray Diffraction, IR Spectroscopic, Thermal, and
           Thermochemical Studies
    • Authors: L. P. Ogorodova; M. F. Vigasina; E. A. Vlasov; L. V. Mel’chakova; V. V. Krupskaya; E. M. Spiridonov
      Pages: 234 - 239
      Abstract: The paper reports data obtained in the course of a comprehensive physicochemical study of Li-tosudite, a mixed-layer mineral from hydrothermally altered rocks in western Chukotka, Russia, whose formula was reliably established. The enthalpy of formation of Li-tosudite from Chukotka, Ca0.15(Li0.9Mg0.2Al6.0)[Si6.4Al1.6O20](OH)10 · 3.3H2O, from elements was experimentally determined by melt solution calorimetry in a high-temperature Calvet microcalorimeter: ΔfH el o (298.15 К) =–15087 ± 26 kJ/mol. The standard entropy and Gibbs free energy of formation of this mineral were evaluated.
      PubDate: 2018-03-01
      DOI: 10.1134/s0016702918030059
      Issue No: Vol. 56, No. 3 (2018)
       
  • Gold Dissolution in Dry Salt Melts in the Presence of SiO 2 as a Function
           of Р(O 2 )
    • Authors: K. I. Shmulovich; P. G. Bukhtiyarov; E. S. Persikov
      Pages: 240 - 245
      Abstract: The solubility of gold was measured in dry NaCl salt melt at 860°С in closed systems with SiO2 (silica glass). The reactions do not occur in a closed system without oxidizer. Reaction of SiO2 with salt in the presence of an oxidizer (KClO4) results in the formation of water-soluble sodium silicates (a mixture of meta-, ortho-, and pyrosilicates). Gold mobilization by a salt melt is limited by the diffusion of Na in SiO2. In a closed system with the addition of a strong oxidizer (dry KClO4 salt), the solubility of gold increase with increasing amount of KClO4 and the saturation level is estimated to be ~3 wt % Au. For ampoule configurations used in our experiments, 5.5 g of gold dissolved per 1 g of KClO4. Only cheap, non-toxic reagents were used in our model experiments on gold dissolution in a salt melt, which did not require elevated pressures. The solubility of 30 g Au per 1 kg NaCl will eliminate geochemical problems associated with the compact leaching of gold ores using cyanide.
      PubDate: 2018-03-01
      DOI: 10.1134/s0016702918030084
      Issue No: Vol. 56, No. 3 (2018)
       
  • Implications of Color and Lightness Characteristics for Lithostratigraphy
           of Bottom Sediments from the Chukchi Plateau, Arctic Ocean
    • Authors: A. N. Kolesnik; A. A. Bosin; O. N. Kolesnik; V. V. Sattarova; E. G. Vologina; E. E. Taldenkova; N. O. Chistyakova
      Pages: 246 - 255
      Abstract: Marine sediment cores from the Chukchi Plateau are used to demonstrate the efficiency of digital photographic determination of sediment color and lightness, supplemented with the statistically processed data on sediment composition, for lithostratigraphy and paleoreconstructions. Several clusters were established that correspond to brown and gray sediment layers, carbonate-rich beige interlayers and specific segments of unclear lamination and/or lens-like intercalation of brownish and grayish beds. Correlation of the studied cores with other sediment cores from the region with well-established stratigraphy revealed good correspondence (though with certain specific features) to the conventional model of the Late Pleistocene–Holocene sediment accumulation in the offshore Arctic Ocean beyond shelf areas with clearly defined glacial–interglacial cyclicity. It was shown that enhanced red-color component corresponds to the enrichment of the interglacial brown sediment layers with manganese and accompanying elements. Glacial gray layers with enhanced green-color component are enriched in iron, as well as rubidium, vanadium, titanium and yttrium and bear evidence for considerable diagenetic transformations. Blue-color component is related to the high calcium content (carbonate rock fragments) in the carbonate-rich interlayers accumulated during the periods of active disintegration of continental ice sheets and iceberg-rafting of terrigenous lithic fragments. Intermediate values of the studied parameters are likely indicative of specific sedimentation environments.
      PubDate: 2018-03-01
      DOI: 10.1134/s0016702918030035
      Issue No: Vol. 56, No. 3 (2018)
       
  • Relations between the Chemical Composition of Organic Matter in Lacustrine
           Ecosystems and the Genesis of Their Sapropel
    • Authors: O. P. Taran; V. V. Boltenkov; N. I. Ermolaeva; E. Yu. Zarubina; I. V. Delii; R. E. Romanov; V. D. Strakhovenko
      Pages: 256 - 265
      Abstract: The paper presents data on sapropels from ten lacustrine systems at the Barabinsk and Kulunda plains in Novosibirsk region. The sapropels are classified according to the type of the biological contribution to their origin and the content of organic matter. The sapropel of lakes Kachkulnya and Barchin, which are rich in organic matter and differ by the type of their origin (macrophytogenic and planktonogenic), were studied in much detail with the application of the following techniques: X-ray diffraction (XRD), atomic absorption spectroscopy (AAS), and elemental (CHNSO) analysis. Groups of organic compounds contained in the organic matter were determined by successive extraction, and the monosaccharide composition was studied by high-performance liquid chromatography (HPLC). The organic matter of sapropel with different type of boilogical contribution was discovered to differ in elemental (CHNSO) composition, group of organics, and the monosaccharide compositions. Our results led us to conclude that the genesis of sapropel significnalty imprints the composition of its organic matter.
      PubDate: 2018-03-01
      DOI: 10.1134/s0016702918030096
      Issue No: Vol. 56, No. 3 (2018)
       
  • Copper Adsorption by Chernozem Soils and Parent Rocks in Southern Russia
    • Authors: D. L. Pinskii; T. M. Minkina; T. V. Bauer; D. G. Nevidomskaya; S. S. Mandzhieva; M. V. Burachevskaya
      Pages: 266 - 275
      Abstract: Laboratory data in Cu2+ adsorption by chernozems and parent rocks in Rostov region show that adsorption isotherms can be approximated by the Langmuir equation, whose parameters (Kl and C∞) were calculated for all of the samples. The values of C∞ show a strong negative correlation with the values of cationexchange capacity (CEC) (r =–0.88 at Р = 0.95), and Kl is correlated with the content of physical clay (particles <0.01 mm) (r = 0.78) and with clay (particles <0.001 mm) content in ordinary chernozem and southern chernozems of various particle size distribution (r = 0.80). Even stronger correlations were detected between these parameters in southern chernozems (r = 0.89 for the physical clay (PC) and r = 0.91 for the silt). However, none of the samples displays a significant correlation of C∞ and Kl with the contents of physical clay and silt. This led us to conclude that the composition of the samples, for example, their organic matter, can affect Cu2+ adsorption by the soils and parent rocks. Acidification mechanisms of the equilibrium solutions during the Cu2+ adsorption by soils are discussed, as also are the reasons for the absence of balance between Cu2+ adsorbed by soils and exchangeable cations transferred into solution. Analysis of the fine structures of the XANES and EXAFS spectra suggests that Cu2+ can form coordinated chelate complex compounds with humic acids (HA) of soils and can substitute Al3+ at octahedral sites when interacting with clay minerals in soils.
      PubDate: 2018-03-01
      DOI: 10.1134/s0016702918030072
      Issue No: Vol. 56, No. 3 (2018)
       
  • Specialized Methods of Thermal Treatment of Riverine and Marine
           Suspensions Preparatorily to Their Analysis for Trace Concentrations of
           Chemical Elements
    • Authors: V. N. Oreshkin; G. I. Tsizin; Yu. G. Tatsii
      Pages: 276 - 281
      Abstract: The paper considerations of the possibility of the low-temperature (1000°C) and high-temperature (>1500°C) thermal decomposition of solid samples of suspensions and the selective fractional evaporation–condensation of elements in specialized electrothermal crucible and rod atomizers for the purposes of direct atomic-absorption analysis. The approach is applied to analyze samples of riverine and marine suspensions for Ag, Cd, and Tl.
      PubDate: 2018-03-01
      DOI: 10.1134/s0016702918030060
      Issue No: Vol. 56, No. 3 (2018)
       
  • Early Stage in the Evolution of the Paleoasian Ccean at the Western Margin
           of the Siberian Craton: Geochemical and Geochronological Evidence
    • Authors: I. I. Likhanov; S. V. Zinoviev
      Pages: 111 - 124
      Abstract: The discovery of glaucophane relicts in the high-pressure tectonites of the Yenisei suture zone of the Yenisei Ridge suggests the manifestation of the “Chilean-type” convergent margin on the western Siberian Craton, which was controlled by subduction of oceanic crust beneath the continental margin. These rocks are restricted to the tectonic suture between the craton and the Isakovka ocean-island terrane and experienced two metamorphic stages. Petrogeochemical characteristics of the mafic tectonites indicate that their protoliths are N-MORB and E-MORB basalts. More primitive N-MORB basalts were formed at the initial spreading stages through melting of the upper depleted mantle. Higher Ti basalts were formed by melting of enriched mantle protolith at the later spreading stages. U–Pb zircon age of 701.6 ± 8.4 Ma of the metamorphosed analogues of normal basalts marks the initiation of oceanic crust in the region. Revealed sequence of spreading, subduction (640–620 Ma), and shear deformations (~600 Ma) records the early stages in the evolution of the Paleoasian ocean in its junction zone with the western margin of the Siberian craton: from formation of fragments of oceanic crust to the completion of accretionary–subduction events.
      PubDate: 2018-02-01
      DOI: 10.1134/s0016702918020040
      Issue No: Vol. 56, No. 2 (2018)
       
  • Interaction of Titanium Minerals and Their Melts with Diamond-Forming
           Media (Experiments at 7–8 GPa)
    • Authors: Yu. A. Litvin; A. V. Bovkun; V. K. Garanin
      Pages: 148 - 161
      Abstract: Melting relations in the multicomponent diamond-forming systems of the upper mantle with a boundary of K–Na–Mg–Fe–Ca carbonate, phases of the model peridotite and eclogite, carbon, and titanium minerals from kimberlite (ilmenite FeTiO3, perovskite CaTiO3, and rutile TiO2) were studied experimentally at 7–8 GPa and 1600–1650°C. Perovskite reacts with the formation of rutile in the diamond-forming silicate–carbonate melts. We discovered liquid immiscibility between melts of titanium minerals, on the one hand, and carbonate–carbon, peridotite–carbonate–carbon, and eclogite–carbonate–carbon diamond-forming melts, on the other. The solubility of titanium mineral in diamond-forming melts is negligible independent of their concentration in the experimental systems. Growth melts retain high diamond-forming efficiency. In general, the experimental results are evident for the xenogenic nature of titanium minerals in inclusions in diamond and, therefore, in diamond-forming melts. It is shown that the physicochemical factors that may correlate the diamond content with the concentration of Ti in kimberlite do not occur during the diamond genesis in silicate–carbonate–carbon parental melts containing titanium minerals and their melts.
      PubDate: 2018-02-01
      DOI: 10.1134/s0016702918010032
      Issue No: Vol. 56, No. 2 (2018)
       
 
 
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