Papers by Galina Anisimova
Age Constraints and Tectonic Settings of Metallogenic and Magmatic Events in the Verkhoyansk-Kolyma Folded Area
Геология и геофизика, 2018
The paper presents new isotope geochronological data for several mineral deposits, ore occurrence... more The paper presents new isotope geochronological data for several mineral deposits, ore occurrences, and related igneous bodies (plutons and dikes) in the Verkhoyansk–Kolyma folded area, eastern Yakutia. Twenty-one 40Ar/39Ar mica and four U–Pb zircon dates provide the first age constraints on key metallogenic units in the area. The dating results allow correlation between tectonic, magmatic, and metallogenic events. The sampled mineral deposits within the Adycha–Taryn fault zone in the southeastern Verkhoyansk–Chersky orogen apparently formed at the Jurassic–Cretaceous boundary during the final phase of the collision between the Siberian (North Asian) craton and the Kolyma–Omolon microcontinent (Kupol’noe deposit and the early metallogenic pulse of the Malotarynskoe deposit, ~ 143–144 Ma) and in the latest Early Cretaceous, in the beginning of the orogen collapse (Tallalakh and Dora-Pil’ deposits and the Malotarynskoe late metallogenic pulse, ~ 126 Ma). According to the suggested new classification of metallogenic units, these deposits belong to the Late Jurassic–Early Cretaceous Yana–Kolyma metallogenic belt. The Kyuchus deposit (~ 106 Ma), the Deputatsky ore cluster (~ 106–113 Ma), and the Khotoidokh deposit (~ 116 Ma) in the northern Verkhoyansk–Kolyma folded area belong to the North Verkhoyansk metallogenic belt. Their origin was associated with accretional and collisional processes that produced the Novosibirsk–Chukotka orogen in the middle Cretaceous. The Mangazeya ore cluster (~ 100 Ma, Early–Late Cretaceous boundary) in the southwestern end of the North Tirekhtyakh magmatic transverse belt belongs to the West Verkhoyansk metallogenic belt. The Nezhdaninskoe, Zaderzhnoe, Kurum, and Kuta deposits of the South Verkhoyansk area (~ 125–120 and ~ 100–95 Ma) can be joined into a single Verkhoyansk–Okhotsk metallogenic belt. The belt resulted from accretion and collision along the East Asian active continental margin and the related formation of the South Verkhoyansk orogen in the Early Cretaceous.
Russian Geology and Geophysics, 2011
The physicochemical modeling of mineral formation processes at the Badran subthrust gold-quartz d... more The physicochemical modeling of mineral formation processes at the Badran subthrust gold-quartz deposit was performed, based on a study of fluid inclusions in quartz by Raman spectroscopy, gas chromatography, thermometry, and freezing. The results show that at stage I, highly productive gold-bearing quartz veins (gray quartz) of the deposit formed from heterogeneous fluid at <320 ºC and 2.0–0.1 kbar with the active participation of CO2, N2, and CH4; the salinity of this solution reached 10 wt.% NaCl-equiv. At stage II (Au-productive), milky-white quartz was produced from the homogeneous medium-chloride-sulfide solution which remained after the heterogenization of the initial fluid, at 300–100 ºC and 0.1 kbar. At stage III (with low Au production), clear quartz formed from homogeneous chloride solutions with salinity of <4.5 wt.% NaCl-equiv. at <200 ºC and <0.1 kbar. The physicochemical conditions of Au concentration within the complex geochemical system Au–Fe–Cu–Pb–Zn–As...
First Finds of Weissbergite (TlSbS2) and Avicennite (Tl2O3) in Yakutia
Springer eBooks, 2023
Telluride Mineralization of Gold Deposits of the Aldan Shield
Springer proceedings in earth and environmental sciences, 2023
Mercury as an indicator of geological and environmental risks in the development of various mineral raw materials
IOP conference series, 2022
Mercury is a highly toxic pollutant of the environment, and a quantitative assessment of its emis... more Mercury is a highly toxic pollutant of the environment, and a quantitative assessment of its emission and migration in the technogenic transformation of mining regions is vital. The presented study focuses on the features of mercury concentration in the natural mineral raw materials, commercial products and processing waste by the example of mercury-containing copper pyrite deposits in the Urals. Mercury (its quantitative indicators) is used as a reliable element-tracer of the evolution of the technogenic system: mineral raw materials – subsurface use wastes – environmental components – food products – the human body. Such integrated approach is recommended for optimizing the forecasting, assessment and management of geological and environmental risks, as well as for the geological and environmental monitoring of the modern mining engineering system.
государственный университет им. А.С. Пушкина, г. Пушкин 3 Институт геологии алмаза и благородных ... more государственный университет им. А.С. Пушкина, г. Пушкин 3 Институт геологии алмаза и благородных металлов СО РАН, 4 Северо-Восточный государственный университет им. М.К. Аммосова, г. Якутск Рассмотрены специфические региональные особенности образования месторождений техногенного минерального сырья. Обозначены перспективы эффективного ресайклинга разнотипного техногенного минерального сырья. Отмечены возможности снижения экологических рисков влияния отходов недропользования на состояние окружающей среды Ленинградской области, Республик Башкортостан и Саха (Якутия). Ключевые слова: отходы добычи, отходы обогащения, ресайклинг.
PRESENT PROBLEMS OF REGIONAL DEVELOPMENT, 2021
The nature, volumes of accumulation and composition of technogenic mineral raw materials of the m... more The nature, volumes of accumulation and composition of technogenic mineral raw materials of the most important regions of subsoil use of the Russian Federation (RF) are analyzed. The effi ciency of recycling of technogenic raw materials will be ensured by innovative geotechnological and hydrometallurgical methods that reduce capital costs by 3–4 times and production costs by 1.5–2 times.
Mineralogical-Geochemical Features of Ores in Typication of Gold Mineralization of the Verkhneamginsky Area (Southern Yakutia)
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings, 2019
Геология и геофизика, 2018
Based on results of study of the regional position, chemical composition of ores, fluid inclusion... more Based on results of study of the regional position, chemical composition of ores, fluid inclusions, and age relationships between mineralization and igneous rocks, we propose a geological and genetic model for the formation of gold mineralization of the Zaderzhninskoe deposit. Mineralization is located in the tectonic node of the intersection of two regional structures in the supraintrusive zone of a latent granitoid pluton among the terrigenous rocks of the Verkhoyansk complex, which are regionally metamorphosed to the greenschist facies. The sequential deposition of three types of mineralization-Au-quartz (including early low-gold Au-As and late productive Au-Pb-Zn mineralization), Au-rare-metal, and Au-silver-has been established. The Au-Bi (Te) assemblage contains native bismuth, bismuthinite, hedleyite, Bi sulfotellurides, gustavite group minerals, and secondary minerals-Bi oxides and Bi tellurites with low-grade gold. Hg-containing electrum and kustelite, Ag-Sb and Ag-Pb-Sb sulfosalts, stutzite, Te-Pb-containing canfieldite, freibergite, and Au and Ag sulfides are indicator minerals of the Au-Ag (Sb) assemblage. Ore formation occurred at temperatures from 90 to 340 ºC, with the participation of lowly and moderately concentrated solutions with CO 2 ± CH 4 ± N 2 gas phase. A decrease in temperature from Au-quartz mineralization (200-220 ºC) to the late epithermal one (160 ºC) and a slight increase in the concentration of solutions (up to 10 wt.% NaCl equiv.) have been established. The deposit resulted from the intricate multistage geodynamic evolution of the South Verkhoyansk region. Ore-forming processes are associated with the evolution of magmatic objects. Dating of igneous rocks yields the following ages: diorites-130-137 Ma (Rb-Sr), spessartites-126 ± 3 Ma (Rb-Sr), and kersantites-115 ± 1.7 Ma (Ar/Ar). Early concordant Au-quartz (Au-As) mineralization of the deposit is comparable with metamorphic-related Au-quartz veins of the Yur-Bular type, and its age is taken as >137 Ma. The time of formation of Au-quartz (Au-Pb-Zn) mineralization is estimated at 123.5 ± 1.6 Ma (Ar/Ar) and is coeval with the time of intrusion of the Early Cretaceous granitoids of the South Verkhoyansk region. The imposed low-temperature mineralization undoubtedly has a younger age. Its formation was followed by the successive deposition of Au-rare-metal mineralization at the final stage of formation of granitoid plutons (~120 Ma) and Au-Ag mineralization in the period 100 ± 5 Ma, i.e., the time of formation of late-stage granodiorite-granite intrusions.
Geology of Ore Deposits, 2011
The first findings of Au and Ag tellurides (sylvanite and petzite) in sulfide-quartz ore of the S... more The first findings of Au and Ag tellurides (sylvanite and petzite) in sulfide-quartz ore of the Shi rokinsky ore and placer cluster located in the Sette Daban Horst Anticlinorium are described. These miner als were found for the first time at the gold deposits of East Yakutia. The chemical compositions (wt %) of
IOP Conference Series: Earth and Environmental Science, 2019
Methods of scanning tunneling and atomic force microscopy, nano-gold deportment in sulfides was s... more Methods of scanning tunneling and atomic force microscopy, nano-gold deportment in sulfides was studied in carbonaceous shale deposits Kyuchus (Yakutia). Chemical and ionplasma etching in oxygen and argon medium was used for nano-gold detection. It is shown when bombarding with oxygen ions pyrite and arsenic pyrite are etched layer by layer, revealing nano-gold particles. Deformation structures of adjacent sulfide and their interaction with gold separation had been investigated. In arsenic pyrite of early stage gold is found in patterned solid solution.
Weissbergite (TlSbS2) and Avicennite (Tl2O3), Rare Thallium Minerals: First Findings in Yakutia
Geology of Ore Deposits
Minerals
The ore mineralogy of a new promising target of the Aldan–Stanovoy gold province—the Spokoininsky... more The ore mineralogy of a new promising target of the Aldan–Stanovoy gold province—the Spokoininsky cluster—is considered. Gold mineralization is represented by a volumetric, nonlinear type, unconventional for the region; it is related to elements of fold structures and reverse fault in the enclosing metamorphic basement rocks. Vein-disseminated sulfide–(pyrite)–quartz ores build up deposit-like bodies in beresites from gneisses and granite gneisses and are associated with Mesozoic igneous rocks of subalkaline formations. Mineralization is characterized by polysulfide (Fe-Cu-Pb); gold–bismuth (Au-Bi) and gold–silver–telluride (Au-Ag-Te) mineral types. Different mineral types have their own typomorphic minerals and typochemistry (fineness and impurities) of native gold. The widespread distribution of telluride mineralization and its great importance in the formation of gold mineralization on the Aldan shield is confirmed. The distribution area of bismuth (including tellurium–bismuth) m...
The relationship between consciousness and vital living force through the consciousness model
Proceedings of the Karelian Research Centre of the Russian Academy of Sciences
A new type of gold mineralization in the basement of the Aldan-Stanovoi gold-bearing province
Ores and metals
A new type of gold mineralization has been revealed in rocks of the basement of the Aldan-Stanovo... more A new type of gold mineralization has been revealed in rocks of the basement of the Aldan-Stanovoi goldbearing province, within the Spokoininsky ore cluster of the Tyrkandinsky gold-bearing region of southern Yakutia. A geological model has been created of an object with a bulk-minable nonlinear type gold mineralization related to elements of plicative structures and to the reverse fault type tectonics in the hosting metamorphic rocks of the basement. The modeled object is represented by a combination of lodes with veinlet-disseminated sulfide-(pyrite)quartz mineralization. A complex has been refined of prospecting guides and criteria, that characterizes this mineralization type represented by the ore-bearing lodes with gold-quartz and gold-low-sulfide-quartz veinletdisseminated mineralization in rocks of the basement and Late Jurassic-Early Cretaceous magmatic formations. The structural-geological position, the morphological type, the composition of the ore-hosting rocks and ores, ...
Minerals
The new mineral amgaite was discovered at the Khokhoyskoe gold deposit, 120 km W of Aldan town, A... more The new mineral amgaite was discovered at the Khokhoyskoe gold deposit, 120 km W of Aldan town, Aldanskiy District, Sakha Republic (Yakutia), Eastern Siberia, Russia. Amgaite forms fine-grained colloform aggregates up to 0.05 mm across, and is often intimately intergrown with avicennite, unidentified carbonates and antimonates of Tl. Other associated minerals include gold, silver, acanthite, arsenopyrite, pyrite, berthierite, chalcocite, weissbergite, chlorargyrite, calcite, quartz, goethite etc. Amgaite is dark reddish brown to black. It has submetallic luster, black streak, brittle tenacity and conchoidal fracture. Its density calculated from the empirical formula and powder XRD data is 8.358 g/cm3. Its Mohs’ hardness is ca. 1.5–2. Optically, amgaite is uniaxial. In reflected light, it is gray with a bluish shade, very weakly anisotropic with rare brownish red internal reflections. Reflectance values for the four COM wavelengths [Rmin, Rmax (%)(λ in nm)] are: 13.5, 14.2 (470); 12....
IOP Conference Series: Earth and Environmental Science, 2019
The article presents new data on the mineralogical and thermobarogeochemical research of Dyvok or... more The article presents new data on the mineralogical and thermobarogeochemical research of Dyvok ore occurrence. The aim of the research is to learn about the mineral-geochemical characteristics of the ore occurrence as well as about the formation of auriferous mineralogical associations at the occurrence. At the moment, Verkhnealgominsk auriferous area consists of several ore occurrences and a deposit. The area is located within famous Stanovaya auriferous area, South Yakutia. Dyvok ore occurrence is subjected to the influence of Tyrkandinski fault. The host rocks are Early-Archaean K-spar-quartz metasomatites, beresited and argillated rocks with sulphide-quartz veins and mineralised zones of beresited rocks with sulphide and quartz-sulphide mineralisation. Now, there are 3 productive ore zones at the ore occurrence. We found mineral associations that contain native gold and described the variety of its forms, seizes and composition. The mineral associations are 1) gold-arsenopyrite-...
Minerals
This study presents the typomorphic features of native gold grains from three different geologica... more This study presents the typomorphic features of native gold grains from three different geological-industrial types (GIT) of gold deposits in the North-East of Russia: (1) gold–arsenic-sulfide in black shale strata (Natalka, Degdekan, Karalveem, Maldyak deposits), (2) gold–quartz veins in granitoids (Dorozhnoye, Butarnoye, Shkolnoye, Maltan deposits), and (3) gold–silver adularia in volcanogenic strata (Kupol, Olcha, Kubaka, Burgali, Primorskoe, Dalnee deposits). The reliability of the geological interpretation is directly related to mineral associations, fineness variations, its internal structure and the content of microimpurities. Native gold is a reliable indicator for identifying various GIT of gold deposits at the early geological-prospecting stages of studying gold-bearing areas. Typomorphic features of native gold for each of the considered GIT are stable and do not depend on the age and scale of mineralization. It is shown that using an integrated approach obtains genetic i...
Minerals
The published and original data on the tellurium mineralization of gold ore deposits of the Aldan... more The published and original data on the tellurium mineralization of gold ore deposits of the Aldan Shield are systematized and generalized. The gold content is related to hydrothermal-metasomatic processes caused by Mesozoic igneous activity of the region. The formation of tellurides occurred at the very late stages of the generation of gold mineralization of all existing types of metasomatic formations. 29 tellurium minerals, including 16 tellurides, 5 sulfotellurides and 8 tellurates have been identified. Tellurium minerals of two systems predominate: Au-Bi-Te and Au-Ag-Te. Gold is not only in an invisible state in sulfides and in the form of native gold of different fineness, but also is part of a variety of compounds: montbrayite, calaverite, sylvanite, krennerite and petzite. In the gold deposits of the Aldan Shield, three mineral types are distinguished: Au-Ag-Te, Au-Bi-Te, and also a mixed one, which combines the mineralization of both systems. The decrease in the fineness of ...
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Papers by Galina Anisimova