Pub Date : 2023-03-30DOI: 10.34078/1814-0998-2023-1-33-43
A. V. Lozhkin, P. Anderson
The palynological record from Lake El'gygytgyn, spanning the interval between c. 1.286 and 1.492 million years ago, shows repeated changes in plant communities in Arctic Chukotka, which reflect variations in glacial, interstadial, and interglacial climatic conditions. Thirteen pollen zones were defined, corresponding to marine oxygen isotope stages 40-49. The consistent presence of Larix pollen in these pollen spectra indicates that even under extremely severe climatic conditions that occurred in areas of the Anadyr plateau and Lake El'gygytgyn during the Calabrian Age, larch forest-tundra survived. The continued presence of forest habitats differs sharply from the herb- dominated tundra that characterized many glacial intervals in the Arctic during the Middle and Late Pleisto?ene. The warmest climate within the 1.286-1.492 million year interval, seen in pollen zone 9, appeared during isotope stage 43. The maximum in cold conditions occurred during the second half of isotope stage 44 (pollen zone 8).
{"title":"Изменения растительных сообществ арктической Чукотки в изотопные стадии 40-49","authors":"A. V. Lozhkin, P. Anderson","doi":"10.34078/1814-0998-2023-1-33-43","DOIUrl":"https://doi.org/10.34078/1814-0998-2023-1-33-43","url":null,"abstract":"The palynological record from Lake El'gygytgyn, spanning the interval between c. 1.286 and 1.492 million years ago, shows repeated changes in plant communities in Arctic Chukotka, which reflect variations in glacial, interstadial, and interglacial climatic conditions. Thirteen pollen zones were defined, corresponding to marine oxygen isotope stages 40-49. The consistent presence of Larix pollen in these pollen spectra indicates that even under extremely severe climatic conditions that occurred in areas of the Anadyr plateau and Lake El'gygytgyn during the Calabrian Age, larch forest-tundra survived. The continued presence of forest habitats differs sharply from the herb- dominated tundra that characterized many glacial intervals in the Arctic during the Middle and Late Pleisto?ene. The warmest climate within the 1.286-1.492 million year interval, seen in pollen zone 9, appeared during isotope stage 43. The maximum in cold conditions occurred during the second half of isotope stage 44 (pollen zone 8).","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128476601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-30DOI: 10.34078/1814-0998-2022-4-104-111
N. V. Galtseva
The change in the volume and structure of in?ustrial production in Magadan Oblast over a 30-year period was studied. An approach to assessing the trends of key indicators of the region, taking into account the population size, has been proposed. This approach provides more correct assessment of changes in economies of regions with a large-scale population decline. A slight increase in indicators in the absolute volume when measured per capita indicates a significant increase in industrial production and the gross regional product in Magadan Oblast.
{"title":"Динамика и структура промышленного производства в Магаданской области в 1990-2020 гг.: новый подход к оценке тенденций","authors":"N. V. Galtseva","doi":"10.34078/1814-0998-2022-4-104-111","DOIUrl":"https://doi.org/10.34078/1814-0998-2022-4-104-111","url":null,"abstract":"The change in the volume and structure of in?ustrial production in Magadan Oblast over a 30-year period was studied. An approach to assessing the trends of key indicators of the region, taking into account the population size, has been proposed. This approach provides more correct assessment of changes in economies of regions with a large-scale population decline. A slight increase in indicators in the absolute volume when measured per capita indicates a significant increase in industrial production and the gross regional product in Magadan Oblast.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123314461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-30DOI: 10.34078/1814-0998-2022-4-85-93
B. A. Malyarchuk
The rs4264393-G allele of the PRDM7 gene belongs to the polymorphic variants very frequent only in indigenous populations of northeastern Siberia: in Eskimos, Chukchi, and Koryaks, its frequency is 64 %. The results of the paleogenomic data analysis suggest that the rs4264393-G variant was present in the north of modern Yakutia (Duvannyi Yar site) about 10 thousand years ago and probably appeared in Northeast Asia even earlier, during the presumed migrations of East Asian populations (20-18 thousand years ago), which mixed with the Upper Paleolithic groups of North Siberia and gave rise to the ancestors of Paleosiberian populations and Amerindians. The PRDM7 gene encodes for a methyltransferase, involved in histone modification, and appears to be an active regulator of gene activity in melanocytes. The findings are discussed in connection with the peculiarities of Eskimo and Paleo-Asiatic skin pigmentation and the possibility that the rs4264393-G variant of the PRDM7 gene may be involved in the evolution of the Arctic peoples pigmentation system.
{"title":"Полиморфизм локуса rs4264393 гена PRDM7 в популяциях коренного населения Сибири: возможная связь с особенностями пигментации кожи в условиях Крайнего Севера","authors":"B. A. Malyarchuk","doi":"10.34078/1814-0998-2022-4-85-93","DOIUrl":"https://doi.org/10.34078/1814-0998-2022-4-85-93","url":null,"abstract":"The rs4264393-G allele of the PRDM7 gene belongs to the polymorphic variants very frequent only in indigenous populations of northeastern Siberia: in Eskimos, Chukchi, and Koryaks, its frequency is 64 %. The results of the paleogenomic data analysis suggest that the rs4264393-G variant was present in the north of modern Yakutia (Duvannyi Yar site) about 10 thousand years ago and probably appeared in Northeast Asia even earlier, during the presumed migrations of East Asian populations (20-18 thousand years ago), which mixed with the Upper Paleolithic groups of North Siberia and gave rise to the ancestors of Paleosiberian populations and Amerindians. The PRDM7 gene encodes for a methyltransferase, involved in histone modification, and appears to be an active regulator of gene activity in melanocytes. The findings are discussed in connection with the peculiarities of Eskimo and Paleo-Asiatic skin pigmentation and the possibility that the rs4264393-G variant of the PRDM7 gene may be involved in the evolution of the Arctic peoples pigmentation system.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125034140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-30DOI: 10.34078/1814-0998-2022-4-24-34
A. Lozhkin, Yu. A. Korzun, P. Minyuk, P. Anderson, S. Burnatny, O. Glushkova
Chistoye Lake (59° 32' N, 151° 48' E) is located 10 km from the northern coast of Taui Bay (Okhotsk Sea) in the central part of a tectonic depression that has been infilled with Paleogene and Neogene deposits. The lake originated as the result of glacial activity during the latest Pleistocene (MIS2). A 550-cm-long lacustrine sediment core was raised from Chistoye Lake using a piston sampler. The core is dominated by silt with layers of peat and sand at its base. The silt includes two tephra layers at 360-364 cm and 77-80 cm. The tephra layers have different geochemical, magnetic, and mineralogical properties. Volcanic ash like the lower tephra in the Chistoye core has been found in other lacustrine sites from the Upper Kolyma, Upper Indigirka, and Northern Priokhotye regions. Radiocarbon dating of organic remains that bracket this second tephra, corresponding to the lower tephra in Chistoye Lake, indicates an age of 7 650 ± 50 years ago, which is comparable with the age of the Kurile Lake - Iliyinskaya caldera forming eruption in Kamchatka. The younger tephra also has been noted in cores from other lakes in Northern Priokhotye and dated to 2 745 ± 10 years ago. A distinctive feature of this Late Holocene tephra is its high magnetic susceptibility. Extrapolation of a sedimentation rate based on the tephra ages suggests that the Chistoye record is approximately 11 700 years old. Palynological analysis of the Chistoye Lake material showed that all samples contain pollen redeposited from Neogene sediments (Picea sect. Eupicea, Tsuga, Tilia, Corylus, Juglans, Ulmus). These taxa can be easily discounted as contaminant, but other pollen types (e. g., Pinus subgen. Haploxylon, Betula, Alnus, Cyperaceae, Poaceae) are more problematic for interpreting the paleovegetation, because they represent plants that were present during the Holocene and/or the Late Pleistocene and during the Neogene. Nonetheless, the changes in the percentages of Sphagnum spores suggest a gradual increase in effective moisture during the Younger Dryas and Holocene. A multiproxy study of the sediments from Chistoye Lake, in conjunction with their palynological characteristics, shows the importance of analyzing magnetic properties to help determine the presence of tephra in the sediments. Volcanic ash layers in the lake sediments from northeastern Siberia are reliable chronostratigraphic markers that can supplement radiocarbon dates and improve the regional understanding of climate and vegetation changes during the Holocene.
{"title":"Palynological Characteristics and Volcanic Ash from Sediments of Chistoye Lake, Northern Priokhotye","authors":"A. Lozhkin, Yu. A. Korzun, P. Minyuk, P. Anderson, S. Burnatny, O. Glushkova","doi":"10.34078/1814-0998-2022-4-24-34","DOIUrl":"https://doi.org/10.34078/1814-0998-2022-4-24-34","url":null,"abstract":"Chistoye Lake (59° 32' N, 151° 48' E) is located 10 km from the northern coast of Taui Bay (Okhotsk Sea) in the central part of a tectonic depression that has been infilled with Paleogene and Neogene deposits. The lake originated as the result of glacial activity during the latest Pleistocene (MIS2). A 550-cm-long lacustrine sediment core was raised from Chistoye Lake using a piston sampler. The core is dominated by silt with layers of peat and sand at its base. The silt includes two tephra layers at 360-364 cm and 77-80 cm. The tephra layers have different geochemical, magnetic, and mineralogical properties. Volcanic ash like the lower tephra in the Chistoye core has been found in other lacustrine sites from the Upper Kolyma, Upper Indigirka, and Northern Priokhotye regions. Radiocarbon dating of organic remains that bracket this second tephra, corresponding to the lower tephra in Chistoye Lake, indicates an age of 7 650 ± 50 years ago, which is comparable with the age of the Kurile Lake - Iliyinskaya caldera forming eruption in Kamchatka. The younger tephra also has been noted in cores from other lakes in Northern Priokhotye and dated to 2 745 ± 10 years ago. A distinctive feature of this Late Holocene tephra is its high magnetic susceptibility. Extrapolation of a sedimentation rate based on the tephra ages suggests that the Chistoye record is approximately 11 700 years old. Palynological analysis of the Chistoye Lake material showed that all samples contain pollen redeposited from Neogene sediments (Picea sect. Eupicea, Tsuga, Tilia, Corylus, Juglans, Ulmus). These taxa can be easily discounted as contaminant, but other pollen types (e. g., Pinus subgen. Haploxylon, Betula, Alnus, Cyperaceae, Poaceae) are more problematic for interpreting the paleovegetation, because they represent plants that were present during the Holocene and/or the Late Pleistocene and during the Neogene. Nonetheless, the changes in the percentages of Sphagnum spores suggest a gradual increase in effective moisture during the Younger Dryas and Holocene. A multiproxy study of the sediments from Chistoye Lake, in conjunction with their palynological characteristics, shows the importance of analyzing magnetic properties to help determine the presence of tephra in the sediments. Volcanic ash layers in the lake sediments from northeastern Siberia are reliable chronostratigraphic markers that can supplement radiocarbon dates and improve the regional understanding of climate and vegetation changes during the Holocene.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129760513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-30DOI: 10.34078/1814-0998-2022-4-112-123
Yu.V. Pruss, О. Sharypova
Spatial transformations of the administrative-territorial division, exemplified by Magadan Oblast, have been analized. Under the low density and the continuing outflow of population, the high share of subsidies and the regional budget deficit, the option of further optimization of the administrative- territorial structure within the borders of the region is proposed in order to improve the mechanisms of territorial management, economic growth, and budget saving. The effect of possible modification of the administrative-territorial structure through the consolidation of municipalities, expressed in significant budget saving, is estimated. The necessity of searching for and implementing new ways and conditions of economic activity with the involvement of private capital in the area of servicing the vital activity of the territory is substantiated. The results of the study contribute to the formation of ideas on the trends of spatial development and socio-economic problems in the northern regions of Russia's Far East; they can be used by researchers when researching similar topics, as well as by public authorities when developing strategic documents on spatial regional development.
{"title":"Трансформация административно-территориального устройства как условие жизнеустойчивости регионов Крайнего Северо-Востока России","authors":"Yu.V. Pruss, О. Sharypova","doi":"10.34078/1814-0998-2022-4-112-123","DOIUrl":"https://doi.org/10.34078/1814-0998-2022-4-112-123","url":null,"abstract":"Spatial transformations of the administrative-territorial division, exemplified by Magadan Oblast, have been analized. Under the low density and the continuing outflow of population, the high share of subsidies and the regional budget deficit, the option of further optimization of the administrative- territorial structure within the borders of the region is proposed in order to improve the mechanisms of territorial management, economic growth, and budget saving. The effect of possible modification of the administrative-territorial structure through the consolidation of municipalities, expressed in significant budget saving, is estimated. The necessity of searching for and implementing new ways and conditions of economic activity with the involvement of private capital in the area of servicing the vital activity of the territory is substantiated. The results of the study contribute to the formation of ideas on the trends of spatial development and socio-economic problems in the northern regions of Russia's Far East; they can be used by researchers when researching similar topics, as well as by public authorities when developing strategic documents on spatial regional development.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114182528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-30DOI: 10.34078/1814-0998-2022-4-70-84
S.T. Kim, E.R. Ivshina, N.K. Zavarzina
The commercial fish resourses in West Sakhalin waters demonstrated significant growth in the 2010s. It has been confirmed by results of trawling and egg assessment surveys as well as by the dynamics of length-age characteristics of walleye pollack, Pacific cod, Pacific herring, Pacific capelin, and flat-fishes. The important factor of the present fish resourses growing appears the favorable warming of their environment in the course of long-term periodical climate-oceanology fluctuations.
{"title":"Современное состояние сырьевых ресурсов рыб в северо-восточной части Японского моря","authors":"S.T. Kim, E.R. Ivshina, N.K. Zavarzina","doi":"10.34078/1814-0998-2022-4-70-84","DOIUrl":"https://doi.org/10.34078/1814-0998-2022-4-70-84","url":null,"abstract":"The commercial fish resourses in West Sakhalin waters demonstrated significant growth in the 2010s. It has been confirmed by results of trawling and egg assessment surveys as well as by the dynamics of length-age characteristics of walleye pollack, Pacific cod, Pacific herring, Pacific capelin, and flat-fishes. The important factor of the present fish resourses growing appears the favorable warming of their environment in the course of long-term periodical climate-oceanology fluctuations.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"21 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121843120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-30DOI: 10.34078/1814-0998-2022-4-57-69
V. B. Dokuchaeva
The 90-year period using arboreal plants in Magadan greening is being discussed. In the first stages, the assortment of trees and shrubs planted in the city was mainly limited to local species, Larix cajanderi and Duschekia fruticosа, taken from their natural settings. These two species remain predominant in the current urban greenery. The successful acclimatization of some introduced trees and shrubs permitted to expand the list of arboreal plants used in greening Magadan. The evergreen conifers presence in plantings has become especially noticeable. For stable and systematic greening activities in the city, a plant nursery is needed.
{"title":"История и современное состояние озеленения города Магадана","authors":"V. B. Dokuchaeva","doi":"10.34078/1814-0998-2022-4-57-69","DOIUrl":"https://doi.org/10.34078/1814-0998-2022-4-57-69","url":null,"abstract":"The 90-year period using arboreal plants in Magadan greening is being discussed. In the first stages, the assortment of trees and shrubs planted in the city was mainly limited to local species, Larix cajanderi and Duschekia fruticosа, taken from their natural settings. These two species remain predominant in the current urban greenery. The successful acclimatization of some introduced trees and shrubs permitted to expand the list of arboreal plants used in greening Magadan. The evergreen conifers presence in plantings has become especially noticeable. For stable and systematic greening activities in the city, a plant nursery is needed.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122954599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-30DOI: 10.34078/1814-0998-2022-4-3-9
V.V. Pupatenko, K.S. Ryabinkin
The first results of microseismic sounding the deep structure of the Earth's crust in the western part of the Middle Amur sedimentary basin are presented. Based on the measurement data at 70 points, we produced sections of the relative velocities of S waves along two transversely crossing profiles, total length 90 km. The profiles cross the Itun-Yilan fault zone and other large regional faults zones as well as the Bashmaksky, Preobrazhenovsky, and Samaro-Ditursky grabens. The sections at depths of 4-10 km do not contain velocity anomalies. This may explain the lower seismicity of the studied zone compared to neighboring areas of the Tan Lu fault system.
{"title":"Строение разломных зон юго-западной части Среднеамурского осадочного бассейна (Приамурье) по данным микросейсмических зондирования","authors":"V.V. Pupatenko, K.S. Ryabinkin","doi":"10.34078/1814-0998-2022-4-3-9","DOIUrl":"https://doi.org/10.34078/1814-0998-2022-4-3-9","url":null,"abstract":"The first results of microseismic sounding the deep structure of the Earth's crust in the western part of the Middle Amur sedimentary basin are presented. Based on the measurement data at 70 points, we produced sections of the relative velocities of S waves along two transversely crossing profiles, total length 90 km. The profiles cross the Itun-Yilan fault zone and other large regional faults zones as well as the Bashmaksky, Preobrazhenovsky, and Samaro-Ditursky grabens. The sections at depths of 4-10 km do not contain velocity anomalies. This may explain the lower seismicity of the studied zone compared to neighboring areas of the Tan Lu fault system.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132196963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-30DOI: 10.34078/1814-0998-2022-4-35-45
O. Glushkova, V. N. Smirnov
The manifestations of Holocene glacial morphogenesis in the glacial corries of the Northern Priokhotye are investigated. The authors identify active (developing) glacial corries as well as degrading (dying) ones, which have a pronounced association with certain orographic zones. The corrie morphosculpture is most powerfully formed in the mountain ranges of the peninsulas in the northern part of the Sea of Okhotsk: Koni, Piagina, Taigonos. In the highest part of the Taynynot Range, some corries contain "shielded glaciers". Some of them are associated with stadial end- moraine shafts, which characterize glacier dynamics. The data obtained may be of significance for the correlation of glacial events during the neoglacial maximum and the Little Ice Age.
{"title":"Голоценовые гляциальные формы в Северном Приохотье","authors":"O. Glushkova, V. N. Smirnov","doi":"10.34078/1814-0998-2022-4-35-45","DOIUrl":"https://doi.org/10.34078/1814-0998-2022-4-35-45","url":null,"abstract":"The manifestations of Holocene glacial morphogenesis in the glacial corries of the Northern Priokhotye are investigated. The authors identify active (developing) glacial corries as well as degrading (dying) ones, which have a pronounced association with certain orographic zones. The corrie morphosculpture is most powerfully formed in the mountain ranges of the peninsulas in the northern part of the Sea of Okhotsk: Koni, Piagina, Taigonos. In the highest part of the Taynynot Range, some corries contain \"shielded glaciers\". Some of them are associated with stadial end- moraine shafts, which characterize glacier dynamics. The data obtained may be of significance for the correlation of glacial events during the neoglacial maximum and the Little Ice Age.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116167892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-30DOI: 10.34078/1814-0998-2022-4-46-56
V. Stepanov
The article discusses structural confinement and geochemical features of localization of three historically formed gold ore districts in the Amur gold-bearing province: Solovyovsk, Gonzha, and Tokur, presenting the data on the gold deposits in the districts, from which, since 1890, the main amount of gold has been extracted. It is shown that the structural elements, determining the position of gold ore districts, are the zones of ore-controlling faults: South Tukuringra, North Tukuringra, and Jeltulak. The distinct spatial connection of the native gold and cinnabar dressing halos with the North-Tukuringra and South-Tukuringra fault zones has been established. The significant amounts of mercury in the native gold of the Amur province, as well as high gold content in cinnabar and native mercury are noticed, which may indicate the genetic proximity of the gold and mercury mineralization of the province. It is assumed that the main source of gold and mercury is the mantle matter, initially rich in these components. It is established that, in the Amur gold-bearing province, the principal geochemical feature of ore-controlling fault zones is gold and mercury mineralization confined to them.
{"title":"Структурные и геохимические особенности золоторудных районов Приамурской провинции","authors":"V. Stepanov","doi":"10.34078/1814-0998-2022-4-46-56","DOIUrl":"https://doi.org/10.34078/1814-0998-2022-4-46-56","url":null,"abstract":"The article discusses structural confinement and geochemical features of localization of three historically formed gold ore districts in the Amur gold-bearing province: Solovyovsk, Gonzha, and Tokur, presenting the data on the gold deposits in the districts, from which, since 1890, the main amount of gold has been extracted. It is shown that the structural elements, determining the position of gold ore districts, are the zones of ore-controlling faults: South Tukuringra, North Tukuringra, and Jeltulak. The distinct spatial connection of the native gold and cinnabar dressing halos with the North-Tukuringra and South-Tukuringra fault zones has been established. The significant amounts of mercury in the native gold of the Amur province, as well as high gold content in cinnabar and native mercury are noticed, which may indicate the genetic proximity of the gold and mercury mineralization of the province. It is assumed that the main source of gold and mercury is the mantle matter, initially rich in these components. It is established that, in the Amur gold-bearing province, the principal geochemical feature of ore-controlling fault zones is gold and mercury mineralization confined to them.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126440254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}