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Formation of Abnormal Gas-Geochemical Fields of Methane, Helium, and Hydrogen in Northern Vietnam, Its Coastal and Adjacent Water Areas Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-10-28 N. S. Syrbu, R. B. Shakirov, Le Duc Anh, A. O. Kholmogorov, T. S. Iakimov, V. Yu. Kalgin
Abstract Gas-geochemical studies of the methane, helium, and hydrogen concentrations in the water of thermal and mineral springs, as well as the subsurface atmosphere, of northern Vietnam showed that the region is in the hypabyssal degassing zone of hydrogen and helium flowing to the surface through a fault system in the Earth’s crust. A joint transit of these gases through the fault structures was
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Methane with Abnormally High δ 13 C and δD Values from the Coastal Hot Springs in Lake Baikal Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-10-28 G. V. Kalmychkov, A. Hachikubo, B. G. Pokrovsky, H. Minami, S. Yamashita, O. M. Khlystov
Abstract We studied the composition and isotopic characteristics (δ13C and δD) of hydrocarbon gases from the Kotelnikovsky, Zmeiny, and Goryachnisky hot springs located in the coastal zone of Lake Baikal. Of greatest interest is the Zmeiny Spring located on the eastern coast, where the methane has abnormally high values of δ13C (up to +11‰) and δD (up to +267‰). These values are related to the fractionation
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Depositional Environments in the Eastern Paratethys during the Final Middle Miocene Transgression (Kura Basin, Eastern Georgia) Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-10-28 Yu. V. Rostovtseva
Abstract The mineral composition and depositional environments of the Konkian in eastern Georgia (Kura trough, eastern Paratethys) corresponding to the Kosovian (13.65–12.829 Ma) in the Central Paratethys and the final Middle Miocene marine transgression in Paratethys are considered. Jurassic and Cretaceous volcanic rocks of the Lesser Caucasus (Adzhar–Trialet and Artvin–Bolnisi zones) were identified
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Isotopic Composition (δ 13 C and δ 18 O) and Genesis of Mn-bearing Sediments in the Ushkatyn-III Deposit, Central Kazakhstan Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-10-28 A. I. Brusnitsyn, V. N. Kuleshov, S. A. Sadykov, E. N. Perova, O. S. Vereshchagin
Abstract The Ushkatyn-III deposit is located 300 km west of Karaganda (Central Kazakhstan). It is classified as a weakly metamorphosed Atasu-type hydrothermal-sedimentary ore deposit. Stratiform iron, manganese, and barite–lead orebodies occur in the Upper Devonian (D3fm2) carbonate sequence of this deposit. The Fe- and Mn-bearing rocks were studied. Iron ores are composed of hematite, calcite, and
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Structural and Crystal-Chemical Features and Rb–Sr Age of Globular Glauconite in the Ust-Il’ya Formation (Lower Riphean, Anabar Uplift) Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-10-28 T. S. Zaitseva, T. A. Ivanovskaya, B. A. Sakharov, B. B. Zviagina, O. V. Dorzhieva
Abstract For the first time, mineralogical, structural, crystal-chemical and isotope-geochronological data were obtained for a glauconite sample from the Lower Riphean Ust-Il’ya Formation on the Magan River (western slope of the Anabar Massif, northern Siberia). It has been established that glauconite from the lenticular layer of friable glauconitite (glauconite grains ≥80%) contains two populations
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Structure and Composition of the Holocene–Pleistocene Sediments in the Northern Barents Sea Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-10-28 S. Yu. Sokolov, N. P. Chamov, V. B. Kurnosov
Abstract Signs of extensive migration of gas-bearing fluids from the sedimentary cover into the water column were identified in the northern Barents Sea during Cruises 25 and 28 of the R/V Akademik Nikolai Strakhov. The existence of a chain of interrelated processes has been revealed: upward migration of gas-bearing fluids, increase of gas concentration in bottom sediments, deformation of the bottom
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Specific Features of the Behavior of Diagenesis Products in Rocks of Seismically Active Regions Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-10-28 Yu. O. Gavrilov
Abstract Cretaceous and Paleogene sedimentary sequences of the eastern Caucasus show the traces of vertical migration of gel-type diagenetic products (silica, iron sulfides). Signs of the migration of SiO2 compounds were recorded in the carbonate rocks with an admixture of biogenic silica; the traces of sulfide migration are confined to the alternation of limestone and OM-rich clayey marls. The migration
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Geochemistry, Mineralogy and Petrogenesis of the Vein-Type Barites of Some Portions of the Benue Trough, Nigeria Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-10-28 Ola Peter Sunday, Bamisaiye Oluseyi Adunola, Idowu Thaddeus
Abstract Several barite deposits have been reported to occur in Nigeria within the Benue Trough, one of the West Central African Rift Systems (WCARS) considered variously as an aulacogen, strike-slip or pull-apart basin. In spite of these occurrences and the high local and international demand for barites, Nigerian barite is yet to find a place even in its local market probably due to the poor knowledge
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Geochemical Features of the Jurassic Terrigenous Sedimentary Complex of the Greater Caucasus Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-10-28 Yu. O. Gavrilov
Abstract The paper considers factors that determined the geochemical features of the Jurassic terrigenous complex of the northern Caucasus. It is shown that at the initial stages of sedimentation, source rocks were the pre-Mesozoic crystalline basement. The geochemical composition of the Jurassic rocks was also affected by weathering crusts developed on serpentinite massifs. The formation of large
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Weathering Crusts in the Glukharinyi Ore-Placer Cluster (Kolyma Terrane, Northeastern Russia) and Their Gold Potential Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-09-09 A. N. Glukhov; Yu. A. Kalinin; G. H. Bulyakov
AbstractThe Kolyma Terrane is one of the long-developed regional structures in Northeast Asia. Specifics of its neotectonic evolution promoted the wide distribution of Cenozoic overburden rocks, weathering crusts included. We studied the spatial distribution, mineralogy, chemistry, grain size composition, and morphology of native gold in this region. Only relicts of lower horizons of the weathering
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Facies Structure and Quantitative Parameters of Pleistocene Sedimentation on the Deep-Sea Floor of the Southern Pacific Ocean and in the Scotia Sea Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-09-09 M. A. Levitan; T. N. Gelvi; L. G. Domaratskaya
AbstractBased on the data from long sediment cores retrieved by R/V Eltanin (United States) during the 1950s–1960s, Neo- and Eopleistocene lithofacies maps of the southern Pacific Ocean (scale 1 : 20 000 000) and Scotia Sea (scale 1 : 10 000 000) were compiled for the first time. For the Scotia Sea, schemes of isopachites are shown on the respective lithofacies maps. All maps are processed with the
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Facies and Paleogeographic Reconstructions of Vendian Postglacial Deposits in the Southeastern Nepa–Botuoba Anteclise Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-09-09 E. S. Izyurova; O. V. Postnikova; A. V. Postnikov; O. A. Zueva
AbstractThe work is based on extensive factual material, including a core collection and GIS data on 84 deep wells drilled in the southeastern Nepa–Botuoba anteclise (Siberian Platform). Lithological studies of the Vendian basal deposits formed in the postglacial epoch were carried out. These deposits characterized by significant vertical lithological heterogeneity include layers of highly radioactive
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Dinosaur Footprints in Terrigenous Sediments on the Early Jurassic Shelf of the Central North Caucasus: Sedimentological and Paleoecological Settings Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-09-09 Yu. O. Gavrilov
AbstractDinosaur footprints were found in Pliensbachian terrigenous rocks in the central North Caucasus. Tracks of different sizes (12‒35 cm) were identified at three levels of the Mizur Formation section. The sediments accumulated on the wide (15‒20 km) shelf of a paleobasin. The coastal land was covered with abundant vegetation. The warm and humid climate favored the development of weathering crusts
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Vertical Catagenetic Zonality of the Sedimentary Layer in the Northeastern Barents Shelf Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-09-09 D. S. Nikitin; M. D. Khutorskoy; D. A. Ivanov
AbstractsExpeditionary studies in the last decade yielded new data on the sedimentary layer structure in northeastern Barents shelf. Based on the constructed spatial model of deep temperatures and heat flow distribution, depths of the catagenetic transformation of hydrocarbons in the sedimentary cover of the northeastern Barents shelf are determined, as well spatial and quantitative correlation of
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Residual Sediments of the Vema Fracture Zone, Central Atlantic Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-09-09 N. P. Chamov; S. Yu. Sokolov; S. I. Merenkova
AbstractThe Vema Fracture Zone orthogonally intersecting the Mid-Atlantic Ridge along 11° N is a complex tectono-sedimentary system, through which bottom water is transferred from the western to the eastern Atlantic. The southern surrounding of the fault valley is an extended (about 320 km) transverse ridge. At the early stages of the Vema System evolution, the ridge was located at shallow depths in
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Unique Rhenium Deposit in the Carboniferous Coal-bearing Sands of the Russian Plate: Communication 2. Ore Mineralogy Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-07-12 P. E. Kailachakov; O. A. Doynikova; P. E. Belousov; I. V. Vikentyev
AbstractThe paper reports geochemical and mineralogical data on ores of the Briketno-Zheltuhinskoe U–Mo–Re deposit, which is confined to the Visean paleochannel coal-bearing sandy sediments of the Moscow lignite basin. In addition to main ore elements (Re, Mo, U, and Se), the ores have elevated contents of the following metals (in order of decreasing abundance): Zr, Zn, Mn, Ni, As, Co, V, Pb, Y, Cu
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Formation Conditions of the Paleogene–Neogene Coals in the Dnieper–Donets Coal-Bearing Area (Evidence from the Pesochansk Salt Dome) Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-07-12 L. B. Zaitseva; A. V. Ivanova
AbstractThe paper presents the results of studying the Pesochansk brown coal deposit located in the central Dnieper–Donets coal-bearing area. The sedimentary cover of this area is characterized by the presence of salt structures, one of which is the Pesochansk stock. The subsidence trough of this pre-Paleogene structure was filled with the Paleogene–Neogene sediments containing three brown coal seams
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Geochemical Proxies of Endo- and Exospheric Processes in Sedimentary Sequences and the Upper Precambrian Section in the South Urals Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-07-12 A. V. Maslov
AbstractThe article characterizes some geochemical proxies of endo- and exospheric processes in sedimentary sequences and analyzes their average values in Upper Precambrian clayey rocks in the South Urals. It is shown that a gradual decrease of the Th/Scaver value in Lower Riphean (Mesoproterozoic) ~1750–1300 Ma ago rocks correlates to a certain extent with the assembly and disintegration of the Columbia/Nuna
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Lower Permian Carbonate Buildups in the Northern Timan–Pechora Basin as the Main Hydrocarbon Exploration Object Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-07-12 V. A. Zhemchugova; N. V. Evdokimov; J. Poort; G. G. Akhmanov
AbstractOrganogenic buildups named as carbonate mounds are widespread in Lower Permian deposits in the northern Timan–Pechora basin and are of great interest to the oil-and-gas industry as natural hydrocarbon reservoirs. Their distribution and textural features were controlled by seabed morphology, sea level changes, and specific paleoecology of the Early Permian period. In contrast to classic reefs
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Strontium Isotope Composition in Limestones of the Dal’nyaya Taiga Group in the Patom Basin: Vendian Reference Section of Siberia Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-05-12 S. V. Rud’ko; A. B. Kuznetsov; P. Yu. Petrov
AbstractNew data on the 87Sr/86Sr ratio variations in carbonate rocks of the Dal’nyaya Taiga Group in the Vendian reference section (Ura Uplift, Central Siberia) are presented. The 87Sr/86Sr variations correlate with the sequence-stratigraphic scheme reflecting evolution of the paleobasin, δ13C variations, and paleontological data. Limestones with a high (>1050 µg/g) Sr concentration, which do not
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Unique Rhenium Deposit in the Carboniferous Coal-bearing Sands of the Russian Plate: Communication 1. Geological Structure Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-05-12 I. V. Vikentyev; P. E. Kailachakov
AbstractThe Briketno-Zheltukhinskoe U–Mo–Re deposit is located in the southern sector of the Moscow lignite basin (central East European Platform). It is restricted to the paleochannel and deltaic coal-bearing sandy sediments of the Visean Bobrikov horizon lying on the Famennian limestone. They are overlain by the younger Neogene–Quaternary sands and clays. Tectonically, the deposit is ascribed to
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Pyritization of Rocks in Black Shale/Host Rock Transition Zones: Evidence from the Bazhenov Formation, Western Siberia Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-05-12 V. G. Eder
AbstractA complex of lithological-geochemical studies was carried out in rocks of the Upper Jurassic–Lower Cretaceous Bazhenov Formation and their transition zones to host rocks: composition of rocks, ratio of organic carbon and sulfide sulfur (C/S values), and distribution of several redox indicators (degree of pyritization, content of the authigenic uranium, and values of Mn/Al and Mo/Mn ratios)
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Authigenic Sanidine as a Mineral Indicator of Gravitation-Brine Catagenesis in Carboniferous Rocks in the Southern Limb of the Moscow Syneclise Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-05-12 Yu. V. Yashunskii; S. A. Novikova; V. K. Golubev; I. A. Novikov; A. A. Kiselev; S. V. Grishin
AbstractThe article presents data on numerous findings of authigenic K-feldspars in the Lower–Upper Carboniferous carbonate and terrigenous rocks in the southern limb of the Moscow syneclise, including the Oka–Tsna bar. In terms of the composition and crystalline structure, all feldspar morphotypes (idiomorphic monocrystalline fringes on the surface of sandy clastic grains, fine-crystalline aggregates
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Contourites and Gravitites on the Rio Grande Rise, Southwest Atlantic Ocean (Seismoacoustic Data) Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-05-12 O. V. Levchenko; D. G. Borisov; N. V. Libina
AbstractMorphology of the Rio Grande Rise and the acoustic structure of different types of deposits in its uppermost sedimentary cover were discussed based on high-resolution seismoacoustic profiling of cruises #32 (2010) and #52 (2016) of R/V Akademik Ioffe. Slopes of the Rio Grande Rise are composed mainly of landslide deposits and gravitites, but contourite sedimentation is possible on its southern
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Alteration, Chemical Processes, and Parent Rocks of Haléo-Danielle Plateau Bauxite, Adamawa–Cameroon Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-05-12 D. G. Nyamsari; M. G. Yalçin; I. Wolfson
AbstractThe Haléo-Danielle Plateau bauxite deposit forms the largest part of the 15 km long Minim-Martap Bauxite ore district in the Adamawa Region of Cameroon. The plateau is covered with thin Upper Pleistocene to Holocene alluvial layer. It covers by laterites and bauxites formed on Tertiary-Quaternary basalts. Gibbsite and boehmite are the aluminum oxide found in the bauxite, while goethite is the
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Strontium Isotopic Composition in Carbonate from Breccias of Mud Volcanoes of Azerbaijan Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-03-22 M. I. Bujakaite; V. Yu. Lavrushin; B. G. Pokrovsky
AbstractIn 13 out of 14 samples of carbonate xenoliths from mud volcanic breccias of Azerbaijan, the 87Sr/86Sr values (0.70675–0.70823, 87Sr/86Srmd = 0.7073 ± 0.0005) are within the same limits as in the volcanic waters (Bujakaite et al., 2019). Genetically, they can be associated both with Mesozoic carbonate and saline deposits or with Cenozoic volcanosedimentary strata. Similarity of the Sr isotopic
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Genesis, Features of Mineral Composition, and Problems of the Development of Rare Metal–Titanium Placers in the West Siberian Megaprovince Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-03-22 E. N. Levchenko; D. S. Klyucharev; A. V. Lalomov
AbstractThe coastal-marine rare metal–titanium placers of the West Siberian megaprovince were formed in a relatively short Eocene–Late Oligocene interval. A similar formation mechanism and commonality of primary sources of ore matter were responsible for the single type and similarity of mineral composition of placers in the megaprovince. Based on the comparison of various characteristics of these
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Carbon Isotope Evidence of Methanogenesis in Sediments of the Dal’nyaya Taiga Group (Lower Vendian of the Patom Basin, Siberia) Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-03-22 P. Yu. Petrov; B. G. Pokrovsky
AbstractThe results of lithological, petrographic, and C–O isotope studies of various types of the diagenetic and postdiagenetic carbonate cement in silty mudstones, as well as coeval limestones, in postglacial deposits of the Dal’nyaya Taiga Group (Patom Basin, Siberia) are presented. Evidence of methane generation but not its anaerobic oxidation has been obtained. High δ13C (up to 14.9‰) values of
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Velingrad Hydrogeothermal System (Bulgaria): Geochemical Features and Heat Output Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-03-22 B. G. Polyak; O. E. Kikvadze; A. V. Ermakov; V. Hristov; I. L. Kamenskii; V. Yu. Lavrushin; R. Nakov; B. Deneva
AbstractThe geothermal and hydrochemical parameters of a large hydrogeothermal system located in the city of Velingrad and its environs (southwestern Bulgaria) are discussed. The article summarizes the results of its research, including those obtained by 2019. Temperature of the discharging thermal waters varies from 37 to 94°C. The hotter mineral waters have SO4–HCO3/Na composition with pH ≈ 8.0,
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Isotopic Composition (δ 13 C, δ 18 O) and Genesis of Carbonates from Phosphorite Deposits in the Lesser Karatau (Kazakhstan) Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-03-22 V. N. Kuleshov; A. F. Georgievskii; V. M. Bugina
AbstractThe study of structural features along with carbon and oxygen isotope compositions made it possible to discriminate lithological rocks in deposits of the Karatau phosphorite basin (Kazakhstan) into the following types: high- and low-grade phosphorites; unaltered and altered dolomites (with and without phosphate) hosting phosphorites of the Chulaktau Formation (lower dolomite and Fe–Mn horizons);
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Geochemical Environments of Precambrian Sedimentation Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-03-22 V. G. Kuznetsov
AbstractDistribution of carbonate sediments of different composition in the Precambrian section is reviewed. It is shown that calcium carbonates prevailed in the Archean–initial Early Proterozoic, and iron carbonates dominated in the banded iron formations. Dolomites and magnesites were more widespread in the Proterozoic. Such distribution suggests an acid reductive geochemical environment in the Archean–Early
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Clay Minerals in Basalt Sills from the Sediment Cover, East Pacific Rise Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-03-22 V. B. Kurnosov; B. A. Sakharov; A. R. Geptner; Yu. I. Konovalov; E. O. Goncharov
AbstractClay minerals in basalt sills from the northern East Pacific Rise, covered by Upper Pleistocene clayey–sandy–silty sediments (turbidites, hemipelagites, and diatom oozes) sampled from DSDP Holes 477, 478, and 481A, were studied by X-ray methods based on the modeling of diffraction patterns. Trioctahedral smectites formed in thin (0.1–0.5 and 1.8–4 m) fissured sills that are well permeable for
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Carbon and Oxygen Isotopes and Formation Conditions of the Upper Famennian Shale-Bearing Rocks in the Pripyat Trough, Southern Belarus Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-01-31 A. A. Makhnach; B. G. Pokrovsky; O. V. Murashko; O. L. Petrov
AbstractThe behavior of stable carbon and oxygen isotopes in carbonates during the deposition and diagenesis of sediments in the bioproductive Upper Famennian Pripyat Trough (southern Belarus) is discussed. Limestones and clayey limestones (Corg 0.92 ± 0.11%) are characterized by very low δ13C values (–9.6 ± 0.3‰). Parental sediments of these rocks were deposited in the shallow-water zone during slow
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Adsorption of Heavy Metal Cations by Base Metal Sulfides in the Broken Spur and TAG Hydrothermal Fields, Atlantic Ocean Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-01-31 G. V. Novikov; N. A. Shulga; N. V. Lobus; O. Yu. Bogdanova
AbstractData on the mineral and chemical composition of samples of sulfide deposits from the Broken Spur and TAG (Mid-Atlantic Ridge) are presented. The main minerals in the Broken Spur field are marcasite, pyrrhotite, pyrite, chalcopyrite, and sphalerite; in sample from TAG: chalcopyrite, pyrite, and marcasite. It has been established that these sulfide minerals of Fe, Cu, and Zn are natural ion exchangers
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Rare and Trace Elements in the Modern Bottom Sediments of the Barents Sea Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-01-31 A. V. Maslov; N. V. Politova; N. V. Kozina; V. P. Shevchenko; T. N. Alekseeva
AbstractThe article presents a brief lithological description of modern bottom sediments collected in the Barents Sea during Cruise 67 of the R/V Akademik Mstislav Keldysh at test sites: (1) “Pechora Sea”; (2) “Western slope of the Kanin Shoal”; (3) “Central Barents Sea (Shtokman area)”; (4) “Russkaya Gavan Fjord”; (5) “Medvezhinsky Trough”; (6) area south of Spitsbergen; (7) “Kola Meridian”; (8) “Spitsbergen–Franz
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Geochemistry of Rare and Rare-Earth Elements in Manganiferous Sediments of the Polar Urals and Pai-Khoi Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-01-31 A. I. Brusnitsyn; I. G. Zhukov; E. F. Letnikova
AbstractData on the concentration of rare and rare-earth elements in the Devonian manganese-rich metasediments of the Polar Urals and Pai-Khoi Ridge are presented. It is shown that Sc, V, Rb, Zr, Nb, Hf, Th, and U represent elements delivered to the metalliferous sediments as a part of the detrital material. Excess (relative to the background detrital material) concentrations are established for Li
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The Hettangian–Early Pliensbachian Evolution Phase of the Anabar–Lena Sedimentary Basin, Nordvik Facies Region Lithol. Miner. Resour. (IF 0.342) Pub Date : 2020-01-31 A. Yu. Popov; B. L. Nikitenko
AbstractNew data on the structure and formation conditions of the Anabar–Lena sedimentary basin in the Nordvik facies region at the beginning of the Early Jurassic (Hettangian–early Pliensbachian) are presented. Based on a detailed lithofacies analysis, coastal-continental, coastal-marine, and shallow-marine sedimentation conditions were reconstructed. Ichnofacies studies were carried out for the first
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Cretaceous–Paleogene Boundary in the Sequences of the Northeastern Caucasus, Dagestan: Sedimentology, Geochemistry, and Biota Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-12-03 Yu. O. Gavrilov; E. A. Shcherbinina; E. V. Shchepetova; O. V. Golovanova; B. G. Pokrovsky
AbstractThe results of integrated study of the Cretaceous/Paleogene transition in the northeastern Caucasus are reported. The lithological, geochemical and micropaleontological characteristics of the sediments from two sections (Okhli and Gubden, Mountainous Dagestan) accumulated in different parts of paleobasin are displayed. An analysis of nannofossil distribution at the Cretaceous/Paleogene transition
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Influence of Fluids on the Species Composition and Preservation of Microfossils in Biogenic Carbonate Sediments in the Pobeda Hydrothermal Cluster (Mid-Atlantic Ridge) Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-12-03 I. F. Gablina; O. B. Dmitrenko; T. A. Khusid; N. V. Libina
AbstractBased on materials obtained during Cruise 37 of the R/V Professor Logatchev in the Russian exploration area, the species composition, distribution, and preservation of nanno- and microfossil carbonate shells in biogenic bottom sediments within the Pobeda hydrothermal cluster (17°07.45′–17°08.7′ N MAR) were studied. Physicochemical parameters and total carbonate content were measured and their
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Microbiota of Bauxites in the Eva Deposit (Guinea-Bissau) Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-12-03 A. F. Georgievskiy; E. A. Zhegallo; V. M. Bugina
AbstractNow more than one century after the publication of works of V.I. Vernadsky and Ya.V. Samoilov, important role of the biogenic factor in the sedimentary ore genesis has become an undeniable fact for all geologists. Discussions at present are concerned mainly with creative nature of the activity of organisms in the formation of specified mineral resources. In the collective monograph of Russian
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Mesozoic and Early Cenozoic Paleoecological Events in the Sedimentary Record of the NE Peri-Tethys and Adjacent Areas: An Overview Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-12-03 Yu. O. Gavrilov; E. A. Shcherbinina; G. N. Aleksandrova
AbstractManifestations of short-term global and subglobal events have been recognized in the Mesozoic and Cenozoic sedimentary record of the North Caucasus: Paleocene/Eocene boundary PETM, late Cenomanian (OAE2), late Albian (OAE1c and OAE1d), terminal Aptian–early Albian (OAE1b), early Aptian (OAE1a), late Hauterivian (Faraoni), late Valanginian (Weissert), early Toarcian, late Pliensbachian, and
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Lithostructural Geological-Genetic Model and Mineral Composition of the Krasnokutsk Rare Metal–Titanium Placer Deposit (Ukraine) Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-12-03 E. A. Ganzha; A. V. Lalomov; A. V. Chefranova; A. V. Grigor’eva; L. O. Magazina
AbstractThe paper presents the geological setting, structure, lithology, and placer-controlling factors in the Krasnokutsk placer rare metal–titanium deposit located in Miocene sediments on the northeastern slope of the Dnieper-Donets Depression. The identified lithofacies (alluvial-deltaic, coastal- and shallow-marine, eolian) complexes correspond to the lower (Aquitanian), middle (Burdigalian), and
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Isotope Characteristics (δ 13 C, δ 18 O) of Continental Carbonates from Permian‒Triassic Rocks in the Northeastern Russian Plate: Paleoclimatic and Biotic Reasons and Chemostratigraphy Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-12-03 V. N. Kuleshov; M. P. Arefiev; B. G. Pokrovsky
AbstractCarbon and oxygen isotope compositions were determined in the pedogenic, sedimentary, and organogenic carbonates from Upper Permian (Vyatkian Stage) and Lower Triassic (Induan Stage) continental rocks in the northeastern Moscow Syneclise. Variations of δ18O (18.0 to 29.1‰ SMOW) and δ13C (‒8.8 to 0.7‰ PDB) in them could be provoked both by regional climatic fluctuations and by perturbation of
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Mineralogical and Geochemical Features of Pyrite Nodules from Sulfide Turbidites in the Talgan Cu-Zn Massive Sulfide Deposit (Southern Urals) Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-12-03 N. R. Ayupova; V. V. Maslennikov; D. A. Artem’ev; I. A. Blinov
AbstractPyrite nodules were found in thin-layered sulfide ores localized at the flanks of the Talgan Cu-Zn massive sulfide deposit (South Urals) which consists of (1) an inner core (microgranular pyrite with inclusions of gangue minerals and authigenic sulfides), (2) an intermediate zone (anhedral and subhedral pyrite metacrystals), (3) an outer zone (parallel-columnar subhedral pyrite crystals), and
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Strontium Isotope Composition of Mud Volcanic Waters in Azerbaijan Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-09-02 M. I. Bujakaite; V. Yu. Lavrushin; B. G. Pokrovsky
AbstractThe Sr isotope composition was studied in waters from 22 mud volcanoes in Azerbaijan, where the O and H isotope compositions, as well as concentrations of macro- and microelements, were determined earlier in (Lavrushin et al., 2015). Values of the 87Sr/86Sr ratio in the Azerbaijanian mud volcanoes range from 0.7067 to 0.7083. Its minimum value was recorded in water of Neftechala Yuzhnaya Volcano
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Tectonic-Sedimentary System of the Atlantis‒Meteor Seamounts (North Atlantic): Volcanism and Sedimentation in the Late Miocene‒Pliocene and Position in the Atlantic‒Arctic Rift System Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-09-02 N. P. Chamov; I. E. Stukalova; S. Yu. Sokolov; A. A. Peive; N. V. Gor’kova; A. A. Razumovskii; M. E. Bylinskaya; L. A. Golovina
AbstractThe paper analyzes original data obtained on the Atlantis‒Meteor seamount system during Cruise 33 of the R/V Akademik Nikolai Strakhov in the eastern North Atlantic. This system is a volcanic rise formed on the Canary abyssal plate and represents one of the key objects for understanding the geological history of opening of the central segment of the Atlantic Ocean. Basalts, tephrites, and organogenic
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Rare Elements—Markers of the Formation Setting of Manganese and Iron Ores in the Kalahari and Postmasburg Manganese Fields (South Africa): Communication 2. Postmasburg Iron and Manganese Field Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-09-02 I. M. Varentsov; V. N. Kuleshov
AbstractDeposits in the Postmasburg field, South Africa, confined to rocks of the Transvaal Supergroup, occupy a significant place in world resources of the manganese and iron ores. The ore deposits represent karst residual accumulations. Several elements (B, Cr, Ni, Zn, Ge, As, Se, Mo, Ag, Cd, Sb, Te, W, Pb, REE) in them make up an assemblage providing insight into the geochemistry of the processes
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Distribution of Elements in Ferromanganese Nodules in Seas and Lakes Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-09-02 G. N. Baturin
AbstractBased on original and literature data, the element composition of ferromanganese nodules from the bottom of lakes and intracontinental and Arctic seas is used for a comparison with nodules in the World Ocean. The main similarities and dissimilarities in the composition of nodules, as well as trends in the accumulation of chemical elements in them, are described. It is shown that high metal
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Synrift Sandstones and Mudstones: Bulk Chemical Composition and Position in Some Discriminant Paleogeodynamic Diagrams Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-09-02 A. V. Maslov; V. N. Podkovyrov; E. Z. Gareev; A. D. Nozhkin
AbstractThe bulk chemical composition of synrift sandstones and associated mudstones is analyzed. Distribution of their fields in the discriminant paleogeodynamic diagrams SiO2–K2O/Na2O (Roser and Korsch, 1986) and DF1–DF2 (Verma and Armstrong-Altrin, 2013) is examined. In terms of the bulk chemical composition, the sandstones correspond mainly to graywackes, litites, arkoses, and subarkoses. The samples
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A New Genetic Type of Leaching Zone in Salts of the Verkhnyaya Kama Potassium Salt Deposit: Hydrochemical, Mineralogical, and Structural Indicators Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-06-28 I. I. Chaikovskiy; O. V. Korotchenkova; D. E. Trapeznikov
AbstractThe brine-saturated leaching zone discovered in the Verkhnyaya Kama salt deposit is scrutinized. It comprises a cavernous core (40 × 70 m) composed of aposylvinite syngenite (halite rock with gypsum and kalistrontite) and a recrystallization aureole (60–80 m wide) without secondary sulfates. The leaching zone is overlain by a linear zone of the weathering and decarbonatizaton of marls in the
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Pore Space in Carbonate Tidalites: Paleoclimatic Aspect Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-06-28 V. G. Kuznetsov; L. M. Zhuravleva
AbstractCarbonate sediments in tidal zones are characterized by microgranular textures, insignificant content of the clayey material, and abundance of the cyanobacterial formations. The arid climate fosters the formation of dolomitic tidalites in association with evaporites containing numerous stromatolite interlayers. Dolomitic tidalites make up the lower and upper elements of the three-member tr
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Rare Elements—Markers of the Formation Setting of Manganese and Iron Ore Deposits in the Kalahari and Postmasburg Fields (South Africa): Communication 1. Kalahari Manganese Field Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-06-28 I. M. Varentsov; V. N. Kuleshov
AbstractManganese ores of the Lower Proterozoic Hotazel Formation (Transvaal Supergroup) associated with the banded Fe-silicites are marked by high concentrations of several rare elements (B, Ge, W, Mo, Cr, Ni, Zn, Cd, Pb, Ag, Bi, As, Sb, Te, Se). High boron contents in the oxide‒carbonate ores (Mn-lutites) are attributed to the chemosorptional concentration of this element on Mn-carbonates. Owing
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Glauconite in the Lower Cambrian Terrigenous–Carbonate Rocks, Olenek Uplift, North Siberia Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-06-28 T. A. Ivanovskaya; A. R. Geptner; A. T. Savichev; T. S. Zaitseva; N. V. Gor’kova; E. V. Pokrovskaya
AbstractThis work considers for the first time mineralogical features of the Lower Cambrian (Tommotian) glauconite collected from terrigenous–carbonate rocks of the Kessyusa Group (upper part of the Mattaia Formation and lower part of the Chuskuna Formation), as well as from basal beds of the overlying limestones of the Erkeket Formation. Samples were taken from three sections on the northwestern slope
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Sorption of Y 3+ , La 3+ , and Ce 3+ Cations in the Co-Bearing Manganese Crusts on the Magellan Seamounts and Marcus-Wake Rise, Pacific Ocean Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-06-28 G. V. Novikov; N. V. Lobus; A. N. Drozdova; Yu. P. Dikov
AbstractIt has been established that the Co-bearing manganese crusts and crust‒nodule formations in Pacific gyouts are natural, highly selective sorbents of REM (Ce3+, Y3+, La3+) cations. Exchange capacity of ore minerals (vernadite, Fe-vernadite, and Mn-feroxyhyte) increases in the series La3+ < Y3+ < Co2+ < Ce3+ and its mean value increases from 1.67 (La3+) to 2.84 (Ce3+) mg-equiv/g, which is a high
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Role of Elisional Water Exchange in the Hydrodynamic Field Formation in the Yamal–Kara Depression Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-05-31 D. A. Novikov
AbstractUnique material pertaining to the hydrodynamics of petroliferous rocks in the Yamal–Kara Depression has been summarized for the first time in the last 30 years. The region is distinguished by a wide development of anomalous high formation pressure (Ca up to 2.21) in both Jurassic and Lower Cretaceous rocks. Results of the study of filtration-capacity properties and hydrodynamic characteristics
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Formation Conditions of Ferromagnesian Metasomatic Carbonates in the Lower Riphean Terrigenous–Carbonate Rocks of the Southern Urals Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-05-31 M. T. Krupenin; S. V. Michurin; A. A. Sharipova; A. A. Garaeva; D. A. Zamyatina; T. Ya. Gulyaeva
AbstractFerromagnesian carbonate metasomatites in limestones of the Lower Riphean Suran Formation in the Avzyan ore region (Bashkir meganticlinorium) are represented by large Fe-magnesite deposits (e.g., Ismakaevo deposit) and breunnerite stocks (Bogryashka ore occurrence). Metasomatic zonation is manifested as alterations in the series: limestone → dolomite → Fe-magnesite (breunnerite). Fe-magnesite
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Detrital Monazite from Upper Jurassic Sediments in the Central Part of the Frolov Megadepression, Western Siberia: Chemical Dating and Provenances Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-05-31 Yu. V. Erokhin; V. V. Khiller; K. S. Ivanov
AbstractDetrital monazite from Upper Jurassic sediments in the central part of the Frolov megadepression, West Siberian megabasin, is studied. Chemical composition of the mineral is studied and data on its age (chemical dating) are presented. Most monazite clasts are characterized by low roundness and their age corresponds to the Lower Paleozoic. Upper Jurassic sediments were likely derived not only
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Volgian–Early Berriasian Marginal Filter in the West Siberian Marine Basin and Its Influence on Sediment Distribution Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-05-31 A. E. Kontorovich; L. M. Burshtein; B. L. Nikitenko; S. V. Ryzhkova; E. V. Borisov; S. V. Ershov; E. A. Kostyreva; V. A. Kontorovich; A. Yu. Nekhaev; E. V. Ponomareva; M. A. Fomin; P. A. Yan
AbstractThe West Siberian marine basin of the Volgian–initial Berriasian ages is described. It is shown that a marginal filter (according to A.P. Lisitsyn) functioned in the basin. The main mass of terrigenous sediments was deposited within the eastern margin of the sea. The central part of the basin only received a small amount of the terrigenous material. Water area of the West Siberian Sea was 2
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Geochemical and Isotope Characteristics of Carbonates from Ejecta of Mud Volcanoes of the Kura Basin, Azerbaijan Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-05-31 V. Yu. Lavrushin; Ad. A. Aliev; B. G. Pokrovsky; O. A. Kozmenko; O. E. Kikvadze; E. V. Sokol
AbstractThis paper is devoted to the vein and dispersed carbonates from ejecta of mud volcanoes of Azerbaijan. The vein calcites are morphologically diverse and related to the healing of fracture systems. Most of them have δ13C (from –4 to +2‰) and δ18O (from +20 to +26‰) typical of marine carbonates. Some volcanoes contain fragments of the vein calcites enriched in light carbon (δ13C from –49.2 to
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Clay Minerals in Sediments from Contact Zones with Basalt Sills Lithol. Miner. Resour. (IF 0.342) Pub Date : 2019-05-31 V. B. Kurnosov; B. A. Sakharov; A. R. Geptner; Yu. I. Konovalov; E. O. Goncharov
AbstractClay minerals (fraction <0.001 mm) of Upper Pleistocene clayey–sandy–silty sediments recovered by DSDP Holes 481 and 481A in the Northern Trough, Guaymas Basin, Gulf of California, were studied by X-ray methods based on the modeling of diffraction patterns and their comparison with experimental diffractograms. Terrigenous clay minerals are represented mainly by dioctahedral micaceous varieties
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