Russian Geology and Geophysics

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Depth differentiation of the Middle Ordovician graptolite and trilobite complexes of Gorny Altai
Russian Geology and Geophysics - Tập 58 - Trang 711-726 - 2017
N.V. Sennikov, A.V. Timokhin, E.V. Lykova
Abstract A biostratigraphic analysis of the Middle Ordovician reference sections of northeastern Gorny Altai is carried out. We study complexes of pelagic graptolites and benthic trilobites from the Dapingian–Darriwilian Tuloi and Karasu Formations. For the first time for the Late Paleozoic sedimentary basins of Siberia, lithofacies and biofacies ana...... hiện toàn bộ
Reconstructions of long-term ground surface heat flux changes from deep-borehole temperature data
Russian Geology and Geophysics - Tập 55 - Trang 1471-1475 - 2014
D.Yu. Demezhko, A.A. Gornostaeva
Abstract Based on analysis of geothermal data from the Ural superdeep borehole (SG-4) and Onega parametric borehole, the first reconstructions of ground surface heat flux changes for the last 40 kyr have been made. The increase in heat flux during the Pleistocene–Holocene warming (20–10 ka) proceeded ~ 2 kyr earlier than the growth in surface tempera...... hiện toàn bộ
Relationship of the seismic activity of the Tuvinian and adjacent Mongolian areas with the fractal dimensionality of a fault system
Russian Geology and Geophysics - Tập 48 - Trang 593-597 - 2007
O.D. Ayunova, Yu.A. Kalush, V.M. Loginov
Abstract Using GIS technologies, we carried out a complex spatial analysis of the seismic activity and fractal dimensionality of fault fields in the Tuvinian and adjacent Mongolian areas. Results obtained showed that seismic activity is intrinsic to zones with the low fractal dimensionalities (1.2–1.4) of fault systems.
Fracture in heterogeneous materials: experimental and theoretical studies
Russian Geology and Geophysics - Tập 58 - Trang 738-743 - 2017
V.S. Kuksenko, Kh.F. Makhmudov
Abstract The kinetics of fracture in stressed heterogeneous materials is investigated in a differentiated way using the parameter Δt, the interval between single or multiple (cooperative) microfracture events recorded by acoustic emission (AE) responses. The patterns of fracture nucleation and growth, which is a statistic process, are controlled by t...... hiện toàn bộ
Evaluation of present-day deformations in the Amurian Plate and its surroundings, based on GPS data
Russian Geology and Geophysics - Tập 57 - Trang 1626-1634 - 2016
S.V. Ashurkov, V.A. San’kov, M.A. Serov, P.Yu. Luk’yanov, N.N. Grib, G.S. Bordonskii, M.G. Dembelov
Abstract We analyze recent crustal movements, based on data of GPS measurements on the Amurian Plate and its margins. Most of the velocities were borrowed from scientific publications. Also, our new and updated data of periodic and permanent GPS observations are presented. A continuous field of strain rates has been constructed using the combined fie...... hiện toàn bộ
Fluid inclusions in quartz from uranium mineralization areas of the Litsa ore cluster (Kola Peninsula)
Russian Geology and Geophysics - Tập 58 - Trang 1059-1069 - 2017
T.V. Kaulina, A.A. Avedisyan, A.A. Tomilenko, M.A. Ryabukha, V.L. Il’chenko
Abstract Fluid inclusions in quartz from rocks of different ages and with different uranium contents were studied by microthermometry, gas chromatography, and Raman spectroscopy in three areas with uranium mineralization (Skal’noe, Polyarnoe, and Dikoe) in the Litsa ore district of the Kola Peninsula. The studies have revealed differences in the homo...... hiện toàn bộ
The large earthquake of 27 August 2008 in Lake Baikal and its precursors
Russian Geology and Geophysics - Tập 52 - Trang 405-410 - 2011
R.M. Semenov, O.P. Smekalin
Abstract The large earthquake which shook the southern part of Lake Baikal on August 27, 2008 has received much scientific and public interest. The occurrence of the event in the high-seismicity Baikal rift was not surprising but its origin time was, as usual, unexpected. We discuss the geological conditions of the earthquake, its macroseismic effect...... hiện toàn bộ
Mechanical abrasion of kimberlite indicator minerals: experimental investigations
Russian Geology and Geophysics - Tập 49 - Trang 91-97 - 2008
V.P. Afanas'ev, E.I. Nikolenko, N.S. Tychkov, A.T. Titov, A.V. Tolstov, V.P. Kornilova, N.V. Sobolev
Abstract The relative abrasive stability of kimberlite indicator minerals such as pyrope, picroilmenite, olivine, and apatite as well as diamonds and kimberlite fragments was studied experimentally, and the following sequence of mineral abrasive stability was established: pyrope–olivine–picroilmenite–apatite–kimberlite fragments. Diamond did not virt...... hiện toàn bộ
Lower Cretaceous biostratigraphy of Northern Siberia: palynological units and their correlation significance
Russian Geology and Geophysics - Tập 48 - Trang 941-959 - 2007
E.B. Pestchevitskaya
Abstract The Berriasian-Barremian biostratigraphy based on spores and pollen of terrestrial plants found in sections from northern Siberia shows a succession of eight units. The ages of the units are proved by calibration against the Boreal zonal standard and their stratigraphic position is controlled by faunal and dinocyst records. The sections of t...... hiện toàn bộ
History of anticlinal traps and oil and gas fields in Jurassic reservoirs in the northern West Siberian basin
Russian Geology and Geophysics - Tập 58 - Trang 384-392 - 2017
N.V. Pervukhina, G.G. Shemin, V.I. Moskvin
Abstract The paper presents new paleotectonic data on the Bovanenkovo, Taz, and Gubkin dome-shaped uplifts and the Novyi Port, Urengoi, Kharampur, and Medvezh’e swells, with implications for the history of zone J2 and the Jurassic reservoir as a whole. Most of the large uplifts originated in the Early–Middle Jurassic and completed their evolution in ...... hiện toàn bộ
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