Alexander Malov

Alexander Malov
Federal Center for Integrated Arctic Research of Russian Academy of Sciences (FCIAR RAS) · Geodynamics and geology

Doctor in Geology

About

89
Publications
4,703
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191
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Introduction
Alexander I Malov currently works at the Geodynamics and geology, Federal Center for Integrated Arctic Research of Russian Academy of Sciences (FCIAR RAS). Alexander does research in Geochemistry and Hydrogeology. Their current project is 'Uranium and Radiocarbon Dating of Groundwater'.
Additional affiliations
April 2016 - present
Institute of Geodynamics and Geology of the Federal Center for Integrated Arctic Research RAS
Position
  • Managing Director
January 2011 - April 2016
Institute of Environmental Problems of the North of the Ural Branch of Russian Academy of Sciences
Position
  • Head of Department
May 1997 - January 2011
IInstitute of Ecological Problems of the North of the Ural Branch Russian Academy of Sciences
Position
  • Researcher

Publications

Publications (89)
Article
Full-text available
The article presents the results of modeling the chemical interactions of meteoric waters of the Quaternary horizon with siltstones of the upper part of the Vendian Padun Formation of the Mezen syneclise (Arkhangelsk region, Russia). Equilibrium and equilibrium-kinetic approaches were applied. It is shown that under conditions of intensive water ex...
Article
Full-text available
На примере Северо�Двинской впадины показано, что информацию о распределении в водоносных горизонтах природных изотопов U можно использовать при практических оценках продолжительности взаимодействия подземных вод с горными породами (возраста подземных вод). Предложенная методика расчета включает предварительное определение обобщенного расчетного пар...
Article
Full-text available
На основе анализа особенностей геологического строения и гидрогеологических условий Мезенской синеклизы показана направленность изменений состава подземных вод в песчано-глинистых отложениях венда в различных гидродинамических зонах, дана их количественная оценка
Article
Full-text available
На основе анализа особенностей геологического строения и гидрогеологических условий Мезенской синеклизы показана направленность изменений состава подземных вод в песчано-глинистых отложениях венда в различных гидродинамических зонах, дана их количественная оценка
Article
Full-text available
Участие экзогенных подземных вод в формировании состава кимберлитовых пород Якутии и Южной Африки предполагается многими исследователями. Для обоснования этого участия ими приводятся данные об изотопном составе минералов кимберлитовых пород. Однако, количественные оценки соотношения ювенильных и экзогенных составляющих в указанной литературе отсутс...
Article
Full-text available
На основании особенностей геологического строения и гидрогеологических условий Мезенской синеклизы даны тенденции и количественные оценки изменения состава подземных вод в песчано-глинистых породах венда в различных гидродинамических зонах. Рассолы зоны очень затрудненного водообмена характеризуются обеднением Mg (на 47 г/л) и K на (9,3 г/л) и обог...
Article
Full-text available
Установлены повышенные (до 2.6 Бк/дм3) значения альфа-активности изотопов урана в подземных водах водоносного комплекса вендских отложений. Для этих вод характерны также высокие (до 7.2) значения отношения урана-234 к урану-238. Источниками урана являются породы Балтийского щита. Окисление и перевод урана в раствор сопровождалось переносом его в об...
Article
Full-text available
2 тыс. лет) с δ 13 С >-13 ‰ (δ 13 С-показатель, характеризующий отношение изотопов углерода 13 С и 12 С в пробе по сравнению со стандартом) можно в первом приближении использовать сравнительно простую модель Ingerson and Pearson. При δ 13 С <-13 ‰ наиболее подходит для использования модель Mook. Однако если по ней расчетное значение исходной активн...
Chapter
Full-text available
The paper was devoted to the study of the activity of natural and technogenic radionuclides in the environment components around the Lomonosov diamond deposit. This is the only large diamond mining and beneficiation complex in Europe. Samples of river sediments and surface waters were taken from the Zolotitsa River and its tributaries in the area o...
Article
Full-text available
The technogenic impact of the development of the Lomonosov diamond deposit is associated with the discharge of quarry and drainage water into the river, which has a special conservation status. Earlier studies on the composition of bottom sediments showed that there are signs of increased accumulation of heavy metals and radionuclides at wastewater...
Article
Full-text available
The well-investigated aquifers have been selected from the literature to test the potential use of uranium isotopic compositions as a groundwater dating method. These are the Senonian carbonate aquifer of the Nefzaoua basin and Mio-Pliocene sandy aquifer of the Redjime Mâatoug, Tozeur, and Chott El Charsa Plain basins. For the Senonian aquifer, an...
Article
Full-text available
The Arctic regions are characterized by widespread development of permafrost. We studied a sandy aquifer used for water supply in the talik zone of the Pechora River valley. It has been found that groundwater has TDS values from 75 mg/L far from the river bank to 200 mg/L in the coastal zone. This indicates a predominantly atmospheric recharge of g...
Article
Full-text available
The degree of participation of melted glacial, sea and meteoric waters and brines in the formation of groundwater on the coast of the White Sea is given. It has been established that as a result of the melting of ice sheets 400-130 thousand years ago, fresh water penetrated into the sedimentary cover of the Mezen syneclise to a depth of 600 m. The...
Conference Paper
Full-text available
The Arctic regions are characterized by widespread development of permafrost. We studied a sandy aquifer used for water supply in the talik zone of the Pechora River valley (in the western part of the Russian Arctic, extending on the Arctic Ocean coast). In this work, the following tasks are set: i) estimate the concentration of tritium in the grou...
Poster
Full-text available
The isotopic composition of groundwater of various chemical types was studied on the eastern slope of the Baltic Shield (Arkhangelsk region, NW Russia), where repeated continental glaciations and marine transgressions in Pleistocene and Holocene have impacted on groundwater systems. This means that there was an intensive and rapid recharge of aquif...
Poster
Full-text available
The specific objective of this study was to investigate the changes in the chemical composition of river waters during the exploitation of the Lomonosov diamond deposit and the danger of these changes for the ichthyofauna. Protection of quarries from groundwater is carried out by an external drainage circuit of 62 drainage boreholes. The Zolotitsa...
Article
Full-text available
The sequential extraction procedure is used to reconstruct the processes of redistribution of uranium isotopes in the mineral phases of the aquifer of the Vendian sandy-argillaceous deposits developed in the coastal territory of the European North of Russia. This aquifer has large resources of drinking and mineral groundwater which, however, are us...
Article
Full-text available
Описано происхождение и перераспределение изотопов U в водоносном горизонте песчано-глинистых отложений венда в палеодолине на северо-западе России. Процессы химического выветривания вендских отложений привели к образованию мощной зоны окисления, развившейся выше -250 абс. м. Обратная корреляция между концентрациями урана и железа связана с удалени...
Article
Full-text available
The article was devoted to the study of the activity of natural and technogenic radionuclides in the environment components around the Lomonosov diamond deposit. This is the largest diamond mining and beneficiation complex in Europe. Samples of river sediments and surface waters were taken from the Zolotitsa River and its tributaries in the area of...
Article
Full-text available
Выполнена реконструкция геохимических процессов и климатических изменений в плейстоцен-голоцене по изменениям изотопно-химического состава подземных вод за последние 400 тыс. лет на восточном склоне Балтийского щита. Дана оценка степени участия талых ледниковых, морских и метеорных вод и рассолов в формировании подземных вод. Установлено, что в рез...
Article
Full-text available
This article is devoted to the study of trace metals in the bottom sediments of watercourses in the area of the developed Lomonosov diamond deposit, which is the largest industrial diamond deposit in Europe. Samples of river sediments were taken from the Zolotitsa River and all its tributaries in the area of the diamond deposit. In addition, sample...
Article
Full-text available
Rivers play a key role in the water cycle on the earth via integrating all hydrological channels to return terrestrial precipitations back to the oceans. In addition, rivers, together with groundwater, are powerful transformers of the surface lithosphere, responsible for chemical weathering of rocks and the removal of solute into the ocean. Tracing...
Article
Full-text available
Rivers play a key role in the water cycle on the earth via integrating all hydrological channels to return terrestrial precipitations back to the oceans. In addition, rivers, together with groundwater, are powerful transformers of the surface lithosphere, responsible for chemical weathering of rocks and the removal of solute into the ocean. Tracing...
Article
Full-text available
Выяснены источники формирования состава и эволюции подземных вод на юго-восточном побережье Белого моря. Для этого были изучены более пятидесяти проб подземных вод из водоносных горизонтов четвертичных, каменноугольных и вендских терригенно-карбонат-ных отложений. Установлено, что в пресных водах отношение Na/Ca повышается от 0,2 до 40. Это связано...
Article
Full-text available
2004-2014 го-дов было отобрано семьдесят проб дренажных и речных вод и проанализировано изменение их макро-и микроэлементного состава. Было установлено, что до начала сброса дренажных вод в реку Сa-HCO 3 состав речных вод выше и ниже места сброса практически не отличался. В последующие годы вода ниже места сброса приобрела Na-HCO 3 , а затем и Na-H...
Book
Full-text available
Pokrovsky, O.S, Kirpotin, S.N, Malov, A.I. (eds), The Arctic: Current Issues and Challenges. New York: Nova Science Publishers. P. 239-266. Names: Pokrovsky, Oleg S., editor. | Kirpotin, S. N., editor. | Malov, A. I, editor. Title: The Arctic: current issues and challenges / edited by Oleg S.Pokrovsky, Sergey N. Kirpotin, Alexander I. Malov. Other...
Article
Full-text available
This work is part of a research project that aims to develop a method for combined radiocarbon and uranium-isotope dating of groundwater. The specific objective of this study was to investigate the mobility of uranium isotopes in the various mineral phases of rocks of an aquifer of sandy-clay deposits of the Vendian in the northwest of Russia, for...
Article
Full-text available
The article is devoted to the study of the activity of the natural radionuclides 40K, 232Th, 226Ra and technogenic 137Cs radionuclide in the river sediments of watercourses around the Lomonosov diamond deposit (northwestern Russia). This is the only large diamond mining and beneficiation complex in Europe. Samples of river sediments and surface wat...
Preprint
Full-text available
A partial extraction procedure was used to study the distribution of uranium in the 11 mineral phases of rocks of an aquifer of sandy-clay deposits of the Vendian in the northwest of 12 Russia. This work is a part of a research project to develop a method for combined radiocarbon and 13 uranium-isotope dating of groundwater. Representative aliquots...
Article
Full-text available
Repeated continental glaciations and marine transgressions had a strong influence on the geochemical evolution of groundwater systems of the eastern slope of the Baltic Shield (Arkhangelsk region, Russia). The spectrum from modern fresh waters to very old brines is distributed from the surface to a depth of 1 km in Quaternary and Vendian (Ediacaran...
Article
Full-text available
The specific objective of the study is to clarify the sources and characteristics of groundwater chemistry in coastal aquifers of the Northern Dvina basin. It has been established that the chemical composition of fresh water evolves in the direction (Ca-Mg-HCO3)-(Na-HCO3)-(Na-Cl). It is due to successive replacement of the process of calcite dissol...
Article
Full-text available
Based on specific features of the geological structure and hydrogeological conditions of the Mezen Syneclise, the trend and quantitative estimates of compositional changes of groundwater in Vendian sandy-clayey rocks in different hydrodynamic zones are given. Brines of the very difficult water exchange (VDWE) zone in are characterized by the deplet...
Article
Full-text available
The specific objective of this study was to investigate the changes in the chemical composition of river waters during the exploitation of the Lomonosov diamond deposit and the danger of these changes for the ichthyofauna. It was found that the Ca-HCO3 composition of river water both upstream and downstream from the quarry was almost identical befo...
Article
Full-text available
This paper describes the occurrence and redistribution of U in the Vendian siltstones of the paleo valley at NW Russia. The main flow of U to the study area and its deposition as a result of hydrolysis, adsorption on natural sorbents and changes oxidizing conditions of the environmental in reducing conditions was in Vendian-Lower Carboniferous. Dur...
Article
Full-text available
Thermodynamic numerical simulations were carried out to determine the principal simple and complex migration species of Ca, Mg, Na, K, Al, B, Mn, Mo, Sr, and U with Cl–, OH–, SO4⁻², HCO3⁻, and CO3²⁻ in waters at the Lomonosov diamond deposit and to estimate the saturation indexes with respect to kaolinite, Na- and Mg-montmorillonite, Mg- and Na-sap...
Article
Full-text available
Uranium isotopes have been used as mechanistic or time scale tracers of natural processes. This paper describes the occurrence and redistribution of U in the Vendian aquifer of a paleo-valley in NW Russia. Forty-four rock samples were collected from nine boreholes with depths up to 160 m, and 25 groundwater samples were collected from 23 boreholes...
Article
Full-text available
The specific objectives of the study are to clarify the sources and characteristics of groundwater in the aquifers along the coast of the White Sea in northwestern Russia, and on this basis to perform a broad (14)C and (234)U/(238)U dating of all their types, taking into account the mixing processes. Investigation of an evolution of the groundwater...
Preprint
Full-text available
Uranium isotopes actively investigated as mechanistic or time scale tracers of natural processes. This paper describes the occurrence and redistribution of U in the Vendian aquifer of the paleo valley at NW Russia. Forty-four rock samples were collected from boreholes, and twenty-five groundwater samples. The U, Fe concentration, and 234U/238U acti...
Article
Full-text available
Data on modern radiocarbon activity in the old travertine formations of the Pymvashor hydrothermal system were used, in combination with ²³⁰Th/U dating of the travertine, to estimate the ¹⁴C contents of the total dissolved inorganic carbon in the ancient thermal water at the time of precipitation of the travertine (¹⁴Ccalc). With the known values o...
Article
Full-text available
В водах месторождения алмазов им. М.В. Ломоносова термодинамическим компьютерным моделированием определены основные простые и комплексные формы миграции Ca, Mg, Na, K, Al, B, Mn, Mo, Sr, U с Cl-, OH-, и рассчитаны индексы насыщенности следующих минералов: каолинит, Na-и Mg-монтмориллониты, Mg- и Na-сапониты, мусковит и парагонит, биотит, флогопит,...
Article
Full-text available
Эксплуатация карьерного водоотлива на месторождении алмазов им. М.В. Ломоносова начата в 2003 г., опережающее осушение массива вмещающих пород системой водопонижающих скважин – в 2005 г. Интенсивный дренаж в течение нескольких десятков лет вызовет формирование мощной депрессионной воронки, в пределах которой существенно изменится глубина залегания...
Article
Full-text available
Three types of brines with a characteristic composition have been distinguished in the Mezen Syneclise: with increased Na+, with relatively decreased Ca2+, and with relatively increased Ca2+. Rock salt dissolution has been shown to be substantial in the first-type brine formation. It has been noted that these brines are very dynamic and extremely y...
Article
The hot springs of the Pymvashor subarctic hydrothermal system are of considerable interest because the area is devoid of recent volcanism and is located in the permafrost region. We attempted to evaluate the activity of thermal waters with respect to host rocks to quantify the water residence time in this system and date the associated travertine....
Article
The hot springs of the Pymvashor subarctic hydrothermal system are of considerable interest because the area is devoid of recent volcanism and is located in the permafrost region. We attempted to evaluate the activity of thermal waters with respect to host rocks to quantify the water residence time in this system and date the associated travertine....
Conference Paper
Full-text available
The analysis of the results of several methods of chronological constraints on fluid residence time in oxidising conditions for uranium in sandstone aquifers was performed: (1) Andrews and Kay, 1983; (2) Andrews et al., 1982; (3) Fröhlich and Gellermann, 1987; Ivanovich et al., 1991; (4) Rogojin et al., 1998; (5) Malov, 2013. Data reported in the l...
Article
Full-text available
The use of 14C dating of groundwater in some cases, is facing serious difficulties. It first of all - reducing the specific activity of 14C in groundwater due to dissolution of carbonate rocks and increasing age; and mixing with younger waters and understate it. In this regard, it is invited to joint use 14C and 234U-238U for dating. However, the 2...
Article
Full-text available
The use of 14C dating of groundwater in some cases, is facing serious difficulties. It first of all - reducing the specific activity of 14C in groundwater due to dissolution of carbonate rocks and increasing age; and mixing with younger waters and understate it. In this regard, it is invited to joint use 14C and 234U-238U for dating. However, the 2...
Article
Full-text available
Using the Severnaya Dvina Basin as an example, it is shown that information on the distribution of natural U isotopes in aquifers can be applied for practical estimation of the duration of interaction between groundwater and host rocks (age of groundwater). The proposed calculation method includes preliminary determination of the generalized calcul...
Article
Full-text available
Parameter estimates of the process of passage into water of 234U and 238U isotopes with inequilibrium ratios during 238U decay in rock are given. The Northern Dvina Depression is used as an example to show that data on the fractionation of natural U isotopes can be used to assess the duration of the contact of fresh infiltration water of atmospheri...
Article
Full-text available
To analyze the relationship of the chemical dissolution and leaching of uranium-bearing rocks of the radiation, the estimates of the relative residence time of groundwater in the aquifer was carried out. To do this was used the generic design variable p: probability of 234U atom yield in the water under 238U atom decay in the rock. In the first app...
Article
Full-text available
In the northern-west part of Russia, the main aquifers are joined to the sedimentary basin of the Mezen syneclise, filled predominantly with sandy-argillaceous sediments. These deposits were formed at the expense of drifting of products of the Baltic Shield breaking. Transfer of uranium in suspended and dissolved states was carried out by surface w...
Article
Full-text available
Higher activities of U isotopes were recorded in hydrocarbonate freshwater on watersheds in the regions of occurrence of red Vend sandstones, Fe concentrations being minimal. The lowest activities of U isotopes and the highest Fe concentrations are typical of highly mineralized water under paleovalleys. The highest activities of U isotopes were rec...
Article
Full-text available
Based on specific features of the geological structure and hydrogeological conditions of the Mezen Syneclise, the trend and quantitative estimates of compositional changes of groundwaters in Vendian sandy–clayey rocks in different hydrodynamic zones are given.
Article
Full-text available
A possibility for using the ratio values of the juvenile and exogenous components in definition of forming mechanism of explosive pipes is considered. The filtration coefficients and water conductivity of the sedimentary rocks which form the kimberlite pipes are given. The presence of olivine, serpentine and saponite in the rocks of diamond deposit...
Article
Full-text available
The point of view that exogenic groundwaters participate in the formation of kimberlite rocks in Yakutia and South Africa is shared by many researchers. Data on the isotopic composition of minerals in these kimberlite rocks are usually presented in order to substantiate this assumption. For the Mezen Syncline, we have obtained data on the carbon an...
Article
Full-text available
The changes in the chemical composition of sandy-argillaceous sedimentary rocks in the Mezen syneclise (MS) vend are analyzed using paleohydrogeological reconstruction. As shown, the original composition of vend sediments was considerably different from those observed presently. It was characterized by the content of Na2O: 2-3%; K2O: 1-2%; high con...
Article
Full-text available
Three types of brines with a characteristic composition have been distinguished in the Mezen Syneclise: with increased Na+, with relatively decreased Ca2+, and with relatively increased Ca2+. Rock salt dissolution has been shown to be substantial in the first-type brine formation. It has been noted that these brines are very dynamic and extremely y...

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Project
https://www.mdpi.com/journal/minerals/special_issues/USBMC The average content of uranium in sedimentary rocks ranges from 0.45 to 3.7 ppm, however, it is very actively redistributed in these permeable deposits in strictly defined directions and forms large roll-type deposits. Water is the main carrier of uranium, as a result of which it is always radioactive to one degree or another. The Special Issue "Uranium in sedimentary basins: migration and concentration" welcomes publications covering the entire cycle of uranium movement from areas of origin to areas of (i) natural discharge into the ocean or (ii) industrial mining and processing. The chemical and radiological aspects of the impact of uranium concentrated along certain sections of this route should also be reflected. Finally, the use of uranium isotopes as indicators of geological, hydrogeological and geological processes must be considered and evaluated.
Project
The Journal is issued 4 times a year and presents publications on major research works in the fields of biology, ecology and geosciences. The journal publishes original research articles, reviews, and short notes. The advantage is given to manuscripts based on field and laboratory research and experiments, as well as on mathematical modeling of processes occurring at high latitudes. The publication presents the results of research in Earth sciences (geology, geodesy and cartography, geoinformatics, geoecology, engineering geology, permafrost and soil science, prospecting and exploration of solid minerals, oil and gas fields), biological sciences (biogeography, botany, microbiology, zoology, genetics, ecology, hydrobiology, parasitology, mycology, soil science, biological resources) and physical and mathematical sciences (mathematics, physics). The aims and scope of the Journal "Arctic Environmental Research": 1. Providing an opportunity to scholars to publish their findings; 2. Drawing attention to the most relevant, promising and interesting areas of research in the Arctic and adjacent territories; 3. Exchange of academic information in the international academic space. All the articles published in the journal are in open access. To upload your manuscript, click on the link http://aer.narfu.ru/en/