Published in Doklady Earth Sciences
AbstractThe distribution patterns of rare earth metals (REM) in the rocks of the Kugda massif (Polar Siberia) are assessed. The REM content decreases from early olivinite rocks, containing, on average, 1938 ppm, to the end products of syenite differentiation and increases again in carbonatites. The difference in the distribution coefficients of lig...
Published in Doklady Earth Sciences
AbstractMetagabbroid garnet amphibolite formed after high-pressure granulite with an estimated P–T peak of 12–16 kbar at 700–790°C occurs at the sole of the Kempirsai ophiolite allochthon (Southern Urals). Garnet amphibolite includes high-Fe varieties with the assemblages of garnet and relics of pyroxene, as well as high-alumina rocks composed of g...
Published in Doklady Earth Sciences
AbstractThis paper reports new data on the composition of hydrocarbon gases in bottom sediments of the Laptev–East Siberian marginal shelf transition zone, the continental slope of the Lomonosov Ridge, and Podvodnikov Basin of the Arctic Ocean. Anomalous concentrations of methane and hydrocarbon gases (up to C5 inclusive) have been established. Gas...
Published in Doklady Earth Sciences
AbstractThe generation zones of “voice of the sea” microseisms of three typhoons were determined from the field data using a two-coordinate laser strainmeter. From analyzing the results of processing the experimental data, it was found that the zones of generation of the “voice of the sea” microseisms are located in the areas of generation of prima...
Published in Doklady Earth Sciences
AbstractU–Pb and 40Ar/39Ar age data obtained for volcanic rocks of the Okhotsk–Chukotka Belt in the headwaters of the Malyi Anyui River (the vicinity of Kupol deposit) indicate at least two main pulses of volcanic activity, 98–93 Ma and 90–84 Ma. The conventional stratigraphic models are not consistent with the new data on the age and composition o...
Published in Doklady Earth Sciences
AbstractIn this article, we present the algorithm, that allows to optimise the time and cost of marine seismic surveys. The application of a heuristic, algorithm is proposed for solving the traveling salesman problem on a series of graphs, to which the seismic observation system is reduced. The proposed algorithm assumes work with towed equipment a...
Published in Doklady Earth Sciences
AbstractIn the Angara part of the Yenisei Ridge, a sequential section of the metapicrite–basalt sequence and the overlying carbonate rocks of the Gorevskaya suite has been established, which is considered as a single volcanogenic–sedimentary complex formed at the turn of the Late Mesoproterozoic and Early Neoproterozoic in the riftogenic continenta...
Published in Doklady Earth Sciences
AbstractHere we present reconstructions indicating the stationary position and paleogeography of the Iceland plume, as well as its direct connection to the Mesozoic–Cenozoic large igneous provinces of the northern Atlantic and the Arctic. The main evidence for the stationary position of the Iceland hotspot comes from paleomagnetic data for the trap...
Published in Doklady Earth Sciences
AbstractThe result of ambient noise tomography for the Kambalny Volcano (South Kamchatka), where the first time in the entire history of observations a violent phreatic eruption was observed in March–April 2017, is presented. The results obtained clarify the structure of the upper part of the edifice of the Kambalny Volcano and are consistent with ...
Published in Doklady Earth Sciences
AbstractThe change in the plant growth parameters is shown in model experiments by the example of various commercial high-yielding varieties of green peas (Sofia, Alfa, and Triumf) cultivated in sod-podzolic soil, when a toxic concentration of copper ions (165 mg/kg) and an ultradisperse humate-sapropel suspension (UDHSS) (0.005%–50 ppm) were intro...
