The World’s Largest Fouta Djallon–Mandingo Bauxite Province (West Africa): Part I. Background     

Mamedov  V. I.  Chausov  A. A.  Okonov  E. A.  Makarova  M. A.  Boeva  N. M. 《Geology of Ore Deposits》2020,62(2):163-176

Geology of Ore Deposits - The recognition of the Fouta Djallon–Mandingo territory as an independent bauxite province is substantiated. It is confined to the morphostructure of the same name...  相似文献   

Studying seasonal variations in carbonaceous aerosol particles in the atmosphere over central Siberia     

E.?F.?MikhailovEmail author  S.?Yu.?Mironova  M.?V.?Makarova  S.?S.?Vlasenko  T.?I.?Ryshkevich  A.?V.?Panov  M.?O.?Andreae 《Izvestiya Atmospheric and Oceanic Physics》2015,51(4):423-430

The results of 2-year (2010–2012) measurements of the concentrations of organic carbon (OC) and elemental carbon (EC), which were taken at the Zotino Tall Tower Observatory (ZOTTO) Siberian background station (61° N, 89° E), are given. Despite the fact that this station is located far from populated areas and industrial zones, the concentrations of OC and EC in the atmosphere over boreal forests in central Siberia significantly exceed their background values. In winter and fall, high concentrations of atmospheric carbonaceous aerosol particles are caused by the long-range transport (~1000 km) of air masses that accumulate pollutants from large cities located in both southern and southwestern regions of Siberia. In spring and summer, the pollution level is also high due to regional forest fires and agricultural burning in the steppe zone of western Siberia in the Russian–Kazakh border region. Background concentrations of carbonaceous aerosol particles were observed within relatively short time intervals whose total duration was no more than 20% of the entire observation period. In summer, variations in the background concentrations of OC closely correlated with air temperature, which implies that the biogenic sources of organic-particle formation are dominating.  相似文献   

The neotectonics and geodynamics of the Lower Oka Region (East European Craton)     

N. V. Makarova  V. M. Makeev  T. V. Sukhanova  P. S. Miklyaev  A. L. Dorozhko  I. V. Korobova 《Moscow University Geology Bulletin》2012,67(4):209-217

The neotectonic structures of the Lower Oka (Nizhneokskii) Region formed under different geodynamic conditions. This is attested by the morphology, orientation, internal structure, and jointing of the structures. The Oka-Tsna arc formed under the effect of tension from an inner source on the one hand and stress from the Alpian belt on the other hand. The latitudinally-oriented structures of the northwestern slope of the Tokmovo arc emerged as a result of uplift and widening. Both types of structure are combined within the limits of the Oka-Murom trough, which is a geodynamically active zone.  相似文献   

Prospects of the “WSO-UV” Project for Star Formation Study in Nearby Dwarf Galaxies     

L. N. Makarova  D. I. Makarov 《Solar System Research》2017,51(7):604-610

In the present work we consider the questions of star formation and evolution of nearby dwarf galaxies. We describe the method of star formation history determination based on multicolor photometry of resolved stars and models of color-magnitude diagrams of the galaxies. We present the results of star formation rate determination and its dependence on age and metallicity for dwarf irregular and dwarf spheroidal galaxies in the two nearby galaxy groups M81 and Cen A. Similar age of the last episode of star formation in the central part of the M81 group and also unusually high level of metal enrichment in the several galaxies of the Cen A group are mentioned. We pay special attention to the consideration of perspectives of star formation study in nearby dwarf galaxies with he new WSO-UV observatory.  相似文献   

Holocene overbank deposition in the drainage basin of Lake Khanka     

V.B. Bazarova  M.S. Lyashchevskaya  T.R. Makarova  R.A. Makarevich  L.A. Orlova 《Russian Geology and Geophysics》2018,59(11):1410-1418

Overbank deposits in the Komissarovka River valley consist of alternating silt, clay silt, sand, and soils produced by lacustrine, alluvial, and aeolian deposition and by soil formation. Silt and sand layers in the lower part of the section correlate with the events of Early Holocene transgression and Middle Holocene regression of Lake Khanka. Deposition in the lowermost reaches of the Komissarovka River provides a faithful record of local Holocene landscapes controlled by level changes in Lake Khanka.  相似文献   

The Composition and Reservoir Properties of the Deposits of the Bazhenov Formation in the Central Part of the Tundrin Depression     

O. M. Makarova  N. I. Korobova  A. G. Kalmykov  G. A. Kalmykov 《Moscow University Geology Bulletin》2018,73(2):213-217

The section structure was characterized according to the lithological and petrophysical studies of the core from the Bazhenov Formation that has been uncovered in the central part of the Tundrin Depression. The productive oil intervals where the reservoirs of the pore and fissure-pore types occur were identified.  相似文献   

A Record of Humidity Changes in Sections of a Valley Peatbog in the Southern Part of the Far East     

Razzhigaeva  N. G.  Kopoteva  T. A.  Makarova  T. R.  Grebennikova  T. A.  Lyashchevskaya  M. S.  Mokhova  L. M.  Ganzey  L. A.  Kudryavtseva  E. P.  Panichev  A. M.  Klimin  M. A.  Arslanov  Kh. A.  Maksimov  F. E.  Petrov  A. Yu. 《Doklady Earth Sciences》2023,507(1):S69-S80

Doklady Earth Sciences - Comprehensive study of sections of mares in the Bolshaya Ussurka River basin has allowed highlighting climate changes over the past 2900 years. Reconstructions are based on...  相似文献   

Changes in the Forms of Copper Occurrence in Surface Waters with Increasing Technogenic Load     

Drozdova  O. Yu.  Demin  V. V.  Makarova  M. A.  Karpukhin  M. M.  Lapitskiy  S. A. 《Doklady Earth Sciences》2022,504(2):399-402

Doklady Earth Sciences - The change in the distribution of Cu compounds by size fractions with an increase in its concentration in noncontaminated surface waters has been studied experimentally. It...  相似文献   

Transformation of tropical cyclones into extratropical: The tendencies of 1970–2012     

I. I. Mokhov  E. M. Dobryshman  M. E. Makarova 《Doklady Earth Sciences》2014,454(1):59-63

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Distances to dwarf galaxies of the Canes Venatici I cloud     

D. I. Makarov  L. N. Makarova  R. I. Uklein 《Astrophysical Bulletin》2013,68(2):125-138

We determined the spatial structure of the scattered concentration of galaxies in the Canes Venatici constellation. We redefined the distances for 30 galaxies of this region using the deep images from the Hubble Space Telescope archive with the WFPC2 and ACS cameras.We carried out a high-precision stellar photometry of the resolved stars in these galaxies, and determined the photometric distances by the tip of the red giant branch (TRGB) using an advanced technique and modern calibrations. High accuracy of the results allows us to distinguish the zone of chaotic motions around the center of the system. A group of galaxies around M94 is characterized by the median velocity V _LG = 287 km/s, distance D = 4.28 Mpc, internal velocity dispersion σ = 51 km/s and total luminosity L _B = 1.61 × 10¹⁰ L _?. The projection mass of the system amounts to M _p = 2.56 × 10¹² M _?, which corresponds to the mass-luminosity ratio of (M/L) _p = 159 (M/L)_?. The estimate of the mass-luminosity ratio is significantly higher than the typical ratio M/L _B ～ 30 for the nearby groups of galaxies. The CVn I cloud of galaxies contains 4–5 times less luminous matter compared with the well-known nearby groups, like the Local Group, M81 and CentaurusA. The central galaxy M94 is at least 1^m fainter than any other central galaxy of these groups. However, the concentration of galaxies in the Canes Venatici may have a comparable total mass.  相似文献