Pub Date : 2021-06-30DOI: 10.34078/1814-0998-2021-2-3-16
A. N. Glukhov, V. V. Priymenko, M. I. Fomina, V. V. Akinin
The article presents new data on geology, mineralogy, and geochemistry of porphyry-copper, gold-silver, and silver-polymetallic ore occurrences in the Kongin magmatic zone of the Omolon terrane and granitoids, associated with it. It has been demonstrated that petrology and the age of granitoids are similar to those in the OCVB Penzhina segment. Mineralization of the Kongin zone is very close to that of the OCVB, differing in relatively high Mo in porphyry-copper ores and prevalence of silver-polymetallic mineralization over gold-silver.
{"title":"Металлогения Конгинской зоны Омолонского террейна (Северо-Восток Азии)","authors":"A. N. Glukhov, V. V. Priymenko, M. I. Fomina, V. V. Akinin","doi":"10.34078/1814-0998-2021-2-3-16","DOIUrl":"https://doi.org/10.34078/1814-0998-2021-2-3-16","url":null,"abstract":"The article presents new data on geology, mineralogy, and geochemistry of porphyry-copper, gold-silver, and silver-polymetallic ore occurrences in the Kongin magmatic zone of the Omolon terrane and granitoids, associated with it. It has been demonstrated that petrology and the age of granitoids are similar to those in the OCVB Penzhina segment. Mineralization of the Kongin zone is very close to that of the OCVB, differing in relatively high Mo in porphyry-copper ores and prevalence of silver-polymetallic mineralization over gold-silver.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115064418","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 : 2021-06-30DOI: 10.34078/1814-0998-2021-2-99-104
D. Barykina, S. Vartanyan, D. V. Solovyeva
Catching of Lesser Sandhill Cranes of the Eurasian population was carried out to study the features of their migration using GPS-GSM transmitters. During 2018-2019 we caught 11 adult flying cranes using self-tightening leg loops in the Chaun Lowland, Chukotka, Eastern Siberia. The method has been proven to be the most effective and non-traumatic for catching cranes during summer. Setting of loops along the edge of feeding habitat, the lake with abundant invertebrates primarily crustaceans Conchostraca, was found to be the most effective method of capturing. The construction is cheap and easy to use, install and transport.
{"title":"Метод отлова малого канадского журавля Grus сanadensis canadensis в местах гнездования","authors":"D. Barykina, S. Vartanyan, D. V. Solovyeva","doi":"10.34078/1814-0998-2021-2-99-104","DOIUrl":"https://doi.org/10.34078/1814-0998-2021-2-99-104","url":null,"abstract":"Catching of Lesser Sandhill Cranes of the Eurasian population was carried out to study the features of their migration using GPS-GSM transmitters. During 2018-2019 we caught 11 adult flying cranes using self-tightening leg loops in the Chaun Lowland, Chukotka, Eastern Siberia. The method has been proven to be the most effective and non-traumatic for catching cranes during summer. Setting of loops along the edge of feeding habitat, the lake with abundant invertebrates primarily crustaceans Conchostraca, was found to be the most effective method of capturing. The construction is cheap and easy to use, install and transport.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127206872","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 : 2021-06-30DOI: 10.34078/1814-0998-2021-2-50-67
O. Glushkova, V. N. Smirnov
Based on the currently available data, it has been established that the earliest glaciations occurred in the Late Eopleistocene and at the end of the Early Neopleistocene. They had local distribution in the most uplifted parts of the Chersky Range. Their traces are presented in the form of moraines enclosed in sediments of intermontain depressions. Glacial forms of this age have not been identified in the relief of mountains and plains in the North-East of Russia. The Middle Neopleistocene glaciation was the largest, both in area and length of individual glaciers. It was mountain-valley and reticulated; in some areas, mountain-cover. Its time coincides with the stage of activation of the ascending neotectonic movements in the Middle Neopleistocene. Traces of the last two Late Neopleistocene glaciations are well expressed in the relief in widespread exaration, moraine, and fluvioglacial complexes. The first Late Neopleistocene glaciation (Zyryan) was significantly inferior to the one occurred in the Middle Neopleistocene, in all parameters, but it also left large amphitheaters of terminal moraines in the foothill belts. Glacial complexes of the last Late Neopleistocene glaciation are widespread in areas 2-3 times smaller than the previous one and, as a rule, are located within its contours.
{"title":"Реконструкция масштабов и морфологических особенностей плейстоценовых оледенений на Северо-Востоке России","authors":"O. Glushkova, V. N. Smirnov","doi":"10.34078/1814-0998-2021-2-50-67","DOIUrl":"https://doi.org/10.34078/1814-0998-2021-2-50-67","url":null,"abstract":"Based on the currently available data, it has been established that the earliest glaciations occurred in the Late Eopleistocene and at the end of the Early Neopleistocene. They had local distribution in the most uplifted parts of the Chersky Range. Their traces are presented in the form of moraines enclosed in sediments of intermontain depressions. Glacial forms of this age have not been identified in the relief of mountains and plains in the North-East of Russia. The Middle Neopleistocene glaciation was the largest, both in area and length of individual glaciers. It was mountain-valley and reticulated; in some areas, mountain-cover. Its time coincides with the stage of activation of the ascending neotectonic movements in the Middle Neopleistocene. Traces of the last two Late Neopleistocene glaciations are well expressed in the relief in widespread exaration, moraine, and fluvioglacial complexes. The first Late Neopleistocene glaciation (Zyryan) was significantly inferior to the one occurred in the Middle Neopleistocene, in all parameters, but it also left large amphitheaters of terminal moraines in the foothill belts. Glacial complexes of the last Late Neopleistocene glaciation are widespread in areas 2-3 times smaller than the previous one and, as a rule, are located within its contours.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127803997","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 : 2021-03-29DOI: 10.34078/1814-0998-2021-1-108-122
L. A. Zelenskaya
The results of the sea bird colonies census in the eastern part on the coast of the Tauy Bay, Zavyalov Island, and the Koni Peninsula are presented and discussed. Recent census allows to assess changes in nesting colonies of seabirds that occurred over the past 10-15 years. Total number of nesting seabirds is estimated as more than 92 thousand individuals. Gradual decrease in the number of seabirds colonies was observed on the west coast of the Koni peninsula. The great bulk of seabirds nesting in here is concentrated around Cape Bligan - 11,1 thousand individuals and on Cape Skalisty - 7.5 thousand individuals. Recovery of the colony of murres was recorded. On Cape Skalisty, after almost 30-year absence, and the number of murres quickly grows here. The number of breeding seabirds on Umara Island has remained stable for the last 10 years and is estimated as 60.2 thousand individuals. The total number of breeding seabirds along the surveyed part of the continental coast has decreased from 41.7 thousand individuals to 30.2 thousand in 2009-2019.
{"title":"Результаты обследования колоний морских птиц восточной части Тауйской губы (Охотское море)","authors":"L. A. Zelenskaya","doi":"10.34078/1814-0998-2021-1-108-122","DOIUrl":"https://doi.org/10.34078/1814-0998-2021-1-108-122","url":null,"abstract":"The results of the sea bird colonies census in the eastern part on the coast of the Tauy Bay, Zavyalov Island, and the Koni Peninsula are presented and discussed. Recent census allows to assess changes in nesting colonies of seabirds that occurred over the past 10-15 years. Total number of nesting seabirds is estimated as more than 92 thousand individuals. Gradual decrease in the number of seabirds colonies was observed on the west coast of the Koni peninsula. The great bulk of seabirds nesting in here is concentrated around Cape Bligan - 11,1 thousand individuals and on Cape Skalisty - 7.5 thousand individuals. Recovery of the colony of murres was recorded. On Cape Skalisty, after almost 30-year absence, and the number of murres quickly grows here. The number of breeding seabirds on Umara Island has remained stable for the last 10 years and is estimated as 60.2 thousand individuals. The total number of breeding seabirds along the surveyed part of the continental coast has decreased from 41.7 thousand individuals to 30.2 thousand in 2009-2019.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"AES-22 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121000131","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 : 2020-12-28DOI: 10.34078/1814-0998-2020-4-90-96
A. V. Shestakov, S. I. Grunin
The modern taxonomic composition and biologic features of pisciforms and fishes of the Buyunda River (basin of the Kolyma River) are considered. The ichthyofauna includes 21 taxa of species and subspecies ranks belonging to 19 genera, 12 families, 8 orders, and 2 classes. Representatives of the of Cypriniformes and Salmoniformes orders prevail, shaping the entire ichthyofauna of the river. Two regional endemic species of Northeast Asia the Siberian sucker Catostomus catostomus rostratus and the Kolyma bullhead Cottus kolymensis were recorded.
{"title":"Обзор ихтиофауны реки Буюнда (бассейн р. Колыма)","authors":"A. V. Shestakov, S. I. Grunin","doi":"10.34078/1814-0998-2020-4-90-96","DOIUrl":"https://doi.org/10.34078/1814-0998-2020-4-90-96","url":null,"abstract":"The modern taxonomic composition and biologic features of pisciforms and fishes of the Buyunda River (basin of the Kolyma River) are considered. The ichthyofauna includes 21 taxa of species and subspecies ranks belonging to 19 genera, 12 families, 8 orders, and 2 classes. Representatives of the of Cypriniformes and Salmoniformes orders prevail, shaping the entire ichthyofauna of the river. Two regional endemic species of Northeast Asia the Siberian sucker Catostomus catostomus rostratus and the Kolyma bullhead Cottus kolymensis were recorded.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128896899","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 : 2020-12-28DOI: 10.34078/1814-0998-2020-4-114-123
L. N. Khakhovskaya
Based on archival sources, the author analyzes the situation of the indigenous peoples of the Okhotsk-Kolyma territory during the Great Patriotic War. The government continued to implement paternalistic social policies: the development of housing and social infrastructure in the areas where indigenous peoples live, improvement of medical care and education, and vocational training. It is shown that most indigenous peoples, involved with collective farming worked disciplinedly and responsibly in areas related to traditional nature management (reindeer herding, fishing, fur hunting). With their labor and personal donations, the indigenous people made a feasible contribution to the victory. The indigenous peoples also fought on the front and served in the rear troops.
{"title":"Коренные народы Охотско-колымского края в годы Великой Отечественной войны","authors":"L. N. Khakhovskaya","doi":"10.34078/1814-0998-2020-4-114-123","DOIUrl":"https://doi.org/10.34078/1814-0998-2020-4-114-123","url":null,"abstract":"Based on archival sources, the author analyzes the situation of the indigenous peoples of the Okhotsk-Kolyma territory during the Great Patriotic War. The government continued to implement paternalistic social policies: the development of housing and social infrastructure in the areas where indigenous peoples live, improvement of medical care and education, and vocational training. It is shown that most indigenous peoples, involved with collective farming worked disciplinedly and responsibly in areas related to traditional nature management (reindeer herding, fishing, fur hunting). With their labor and personal donations, the indigenous people made a feasible contribution to the victory. The indigenous peoples also fought on the front and served in the rear troops.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114809759","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 : 2020-12-28DOI: 10.34078/1814-0998-2020-4-105-113
A. L. Gorbachyov
Based on the literature and our own data, a biogeochemical characteristic of the regions of the North is given. The poor knowledge of the microelement status of the inhabitants in the northern areas is shown. Data on technogenic pollution of the North's biosphere by heavy metals are presented. Emphasis is placed on the accumulation in the biosphere of mercury, whith its a neurotoxic effect. Exemplified by mercury and selenium, the antagonistic relationships between chemical elements in a living organism are shown, which may result in the formation of secondary microelements. The reason for the violation of the human physiological and biochemical parameters in the current North conditions against the background of environmental pollution is a violation of the nutrition structure and quality of. It is concluded that, in order to preserve the health of migrants and indigenous people, it is necessary to conduct geochemical zoning of modern Arctic regions, to identify the гpredispositionд of certain territories to biogeochemical endemicity, as well as to take preventive measures for protecting the population against environmentally dependent diseases.
{"title":"Некоторые эколого-медицинские проблемы Севера","authors":"A. L. Gorbachyov","doi":"10.34078/1814-0998-2020-4-105-113","DOIUrl":"https://doi.org/10.34078/1814-0998-2020-4-105-113","url":null,"abstract":"Based on the literature and our own data, a biogeochemical characteristic of the regions of the North is given. The poor knowledge of the microelement status of the inhabitants in the northern areas is shown. Data on technogenic pollution of the North's biosphere by heavy metals are presented. Emphasis is placed on the accumulation in the biosphere of mercury, whith its a neurotoxic effect. Exemplified by mercury and selenium, the antagonistic relationships between chemical elements in a living organism are shown, which may result in the formation of secondary microelements. The reason for the violation of the human physiological and biochemical parameters in the current North conditions against the background of environmental pollution is a violation of the nutrition structure and quality of. It is concluded that, in order to preserve the health of migrants and indigenous people, it is necessary to conduct geochemical zoning of modern Arctic regions, to identify the гpredispositionд of certain territories to biogeochemical endemicity, as well as to take preventive measures for protecting the population against environmentally dependent diseases.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121356498","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 : 2020-12-28DOI: 10.34078/1814-0998-2020-4-13-23
A. Lozhkin, P. Anderson
Long-term observations of the evolution of the Elikchan lakes (Kolyma Upland, Maimandzha Mountains), which form a "chain" that stretches across the flat watershed separating the Upper Kolyma and the Sea of Okhotsk drainages, make it possible to determine how slope, thermokarst processes, and ecology affected landscape changes within this area. Clastic material coming from the slopes of the Maimandzha Mountains formed dams, which created large lakes within the Okhotsk basin (Elikchan-4 Lake, Elikchan-3 Lake). The origin of the lakes belonging to the Kolyma basin is the result of active thermokarst processes associated with the thawing of ice wedges, the development of bogs, the confluence of small lakes and the formation of new larger reservoirs. Such thermokarst processes were some of the main factors in the origin of Elikchan-1 Lake. The continuous palynological record and radiocarbon dating of the Elikchan-1 Lake sediments reflect the successive changes of biocenoses, which correspond to the general pattern of the evolution of the vegetation cover in the Upper Kolyma basin and in Northern Priokhotye. This record shows a change in plant communities over at least the past 9 000 years with a climatic optimum at ca. 8 000 - 6 100 years ago. Comprehensive analysis of Elikchan-1 Lake also emphasizes the significant discrepancies between the boundaries of Holocene subdivisions in the Far Eastern region and the European chrono-stratigraphy for the Holocene. Attempts to resolve the problems of Far East stratigraphy by comparison to the traditional divisions for Europe are a serious mistake. Moreover, a complete analogy of the Far Eastern subdivisions of the Holocene with the European chronological standard should not be expected, just as it is inappropriate to use the УEuropeanФ terminology in the Far Eastern reconstructions. The influences of the primary factors that determine the Holocene events in the Far East sharply differ from those of Europe, including the specific features of the regional climates as they respond to global forcing factors, diversity of the vegetation cover, and variations in the timing of changes in the biocenoses. Given such differences, it is quite natural that equating the Holocene divisions between the two regions is unacceptable. Radiocarbon dating at the base of the Elikchan-1 Lake sedimentary column indicates that the site was originally a peat bog in the Early Holocene with subsequent lake formation. Comparison of radiocarbon dates from the Elikchan-1 peat with other peat deposits in the region suggests that the Early Holocene was a time of active formation and fairly widespread development of peat bogs in the mountainous regions of the Kolyma and Northern Priokhotye.
{"title":"Features of the Formation of Lakes in the Cryogenic Regions of the Upper Kolyma, Northeast Siberia","authors":"A. Lozhkin, P. Anderson","doi":"10.34078/1814-0998-2020-4-13-23","DOIUrl":"https://doi.org/10.34078/1814-0998-2020-4-13-23","url":null,"abstract":"Long-term observations of the evolution of the Elikchan lakes (Kolyma Upland, Maimandzha Mountains), which form a \"chain\" that stretches across the flat watershed separating the Upper Kolyma and the Sea of Okhotsk drainages, make it possible to determine how slope, thermokarst processes, and ecology affected landscape changes within this area. Clastic material coming from the slopes of the Maimandzha Mountains formed dams, which created large lakes within the Okhotsk basin (Elikchan-4 Lake, Elikchan-3 Lake). The origin of the lakes belonging to the Kolyma basin is the result of active thermokarst processes associated with the thawing of ice wedges, the development of bogs, the confluence of small lakes and the formation of new larger reservoirs. Such thermokarst processes were some of the main factors in the origin of Elikchan-1 Lake. The continuous palynological record and radiocarbon dating of the Elikchan-1 Lake sediments reflect the successive changes of biocenoses, which correspond to the general pattern of the evolution of the vegetation cover in the Upper Kolyma basin and in Northern Priokhotye. This record shows a change in plant communities over at least the past 9 000 years with a climatic optimum at ca. 8 000 - 6 100 years ago. Comprehensive analysis of Elikchan-1 Lake also emphasizes the significant discrepancies between the boundaries of Holocene subdivisions in the Far Eastern region and the European chrono-stratigraphy for the Holocene. Attempts to resolve the problems of Far East stratigraphy by comparison to the traditional divisions for Europe are a serious mistake. Moreover, a complete analogy of the Far Eastern subdivisions of the Holocene with the European chronological standard should not be expected, just as it is inappropriate to use the УEuropeanФ terminology in the Far Eastern reconstructions. The influences of the primary factors that determine the Holocene events in the Far East sharply differ from those of Europe, including the specific features of the regional climates as they respond to global forcing factors, diversity of the vegetation cover, and variations in the timing of changes in the biocenoses. Given such differences, it is quite natural that equating the Holocene divisions between the two regions is unacceptable. Radiocarbon dating at the base of the Elikchan-1 Lake sedimentary column indicates that the site was originally a peat bog in the Early Holocene with subsequent lake formation. Comparison of radiocarbon dates from the Elikchan-1 peat with other peat deposits in the region suggests that the Early Holocene was a time of active formation and fairly widespread development of peat bogs in the mountainous regions of the Kolyma and Northern Priokhotye.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"2007 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116936523","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 : 2020-12-28DOI: 10.34078/1814-0998-2020-4-55-61
K. I. Bazhin, S. P. Gotovtsev, I. I. Syromyatnikov
The paper presents the results of using the method of electrotomography to study the state of the base of the waterworks on the Matta River in the village of Berdigestyakh (Central Yakutia). According to geophysical work carried out in the dam downstream, it was found that the talik under the old river bed extends to the depth of more than 14 m, and along the rest of the dam, the talik is confined to the upper part of the section lying in the depth interval from 2.5 to 6.5 m. Drilling showed that the rocks in the talik are water-saturated. Temperature measurements indicate the thawed state of the dam base to the depth of more than 11 m. The specific resistance of thawed rocks varies from 20 to 70 Ohm·m for loams, from 70 to 320 Ohm·m for sand, and 300 to 1200 Ohm·m for frozen sandstones.
{"title":"Обследование оснований гидроузла на р. Матта методом электротомографии (Центральная Якутия)","authors":"K. I. Bazhin, S. P. Gotovtsev, I. I. Syromyatnikov","doi":"10.34078/1814-0998-2020-4-55-61","DOIUrl":"https://doi.org/10.34078/1814-0998-2020-4-55-61","url":null,"abstract":"The paper presents the results of using the method of electrotomography to study the state of the base of the waterworks on the Matta River in the village of Berdigestyakh (Central Yakutia). According to geophysical work carried out in the dam downstream, it was found that the talik under the old river bed extends to the depth of more than 14 m, and along the rest of the dam, the talik is confined to the upper part of the section lying in the depth interval from 2.5 to 6.5 m. Drilling showed that the rocks in the talik are water-saturated. Temperature measurements indicate the thawed state of the dam base to the depth of more than 11 m. The specific resistance of thawed rocks varies from 20 to 70 Ohm·m for loams, from 70 to 320 Ohm·m for sand, and 300 to 1200 Ohm·m for frozen sandstones.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"213 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133156283","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 : 2020-12-28DOI: 10.34078/1814-0998-2020-4-24-38
Yu. V. Taltykin, Feb Ras Khabarovsk Geophysics, L. F. Mishin, E. A. Konovalova
A new mechanism for the formation of ilmenite and magnetite series of granitoids in the Sikhote-Alin orogenic belt is proposed. The existing distribution zones of these magmatites are associated with the regional redox background, where magma crystallization occurs. The paper shows the relationship between the redox background in the lithosphere of the region and subduction processes in the Cretaceous-Paleogene time. The proposed mechanism of formation of the ilmenite and magnetite zones of Sikhote-Alin also explains the differences in redox conditions during the crystallization of Mesozoic magmatites in the orogens of the Eastern and Western Pacific coasts.
{"title":"Окислительно-восстановительный фон в земной коре Сихотэ-Алиньского орогенного пояса при кристаллизации магматитов мел-палеогенового возраста: связь с геодинамикой","authors":"Yu. V. Taltykin, Feb Ras Khabarovsk Geophysics, L. F. Mishin, E. A. Konovalova","doi":"10.34078/1814-0998-2020-4-24-38","DOIUrl":"https://doi.org/10.34078/1814-0998-2020-4-24-38","url":null,"abstract":"A new mechanism for the formation of ilmenite and magnetite series of granitoids in the Sikhote-Alin orogenic belt is proposed. The existing distribution zones of these magmatites are associated with the regional redox background, where magma crystallization occurs. The paper shows the relationship between the redox background in the lithosphere of the region and subduction processes in the Cretaceous-Paleogene time. The proposed mechanism of formation of the ilmenite and magnetite zones of Sikhote-Alin also explains the differences in redox conditions during the crystallization of Mesozoic magmatites in the orogens of the Eastern and Western Pacific coasts.","PeriodicalId":341033,"journal":{"name":"Bulletin of the North-East Science Center","volume":"437 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126125409","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：