Pub Date : 2022-09-20DOI: 10.30730/gtrz.2021.5.2.113-120.121-127
A. Prytkov, N. F. Vasilenko
The strong earthquake with moment magnitude Mw = 7.5 occurred on March 25, 2020, in the North Kurils to the southeast of the Paramushir Island. The hypocenter of the earthquake was located under the oceanic rise of deep-sea trench in the subducting Pacific lithospheric plate. This earthquake has been the strongest seismic event since 1900 for an area about 800 km long of the outer rise of the trench. It also was the strongest earthquake for the 300-kilometer long area of the Kuril-Kamchatka subduction zone adjacent to the epicenter. The article summarizes the data on the Paramushir earthquake. Tectonic position of the earthquake, source parameters, features of the aftershock process development, as well as coseismic displacement of the nearest continuous GNSS station are considered. The performed analysis did not allow us to clearly determine the rupture plane in the source. Nevertheless, the study of the features of the outer-rise earthquake is a matter of scientific interest, since the stress state of the bending area of the subducting Pacific lithospheric plate reflects the interplate interaction in the subduction zone.
{"title":"The March 25, 2020 MW 7.5 Paramushir earthquake","authors":"A. Prytkov, N. F. Vasilenko","doi":"10.30730/gtrz.2021.5.2.113-120.121-127","DOIUrl":"https://doi.org/10.30730/gtrz.2021.5.2.113-120.121-127","url":null,"abstract":"The strong earthquake with moment magnitude Mw = 7.5 occurred on March 25, 2020, in the North Kurils to the southeast of the Paramushir Island. The hypocenter of the earthquake was located under the oceanic rise of deep-sea trench in the subducting Pacific lithospheric plate. This earthquake has been the strongest seismic event since 1900 for an area about 800 km long of the outer rise of the trench. It also was the strongest earthquake for the 300-kilometer long area of the Kuril-Kamchatka subduction zone adjacent to the epicenter. The article summarizes the data on the Paramushir earthquake. Tectonic position of the earthquake, source parameters, features of the aftershock process development, as well as coseismic displacement of the nearest continuous GNSS station are considered. The performed analysis did not allow us to clearly determine the rupture plane in the source. Nevertheless, the study of the features of the outer-rise earthquake is a matter of scientific interest, since the stress state of the bending area of the subducting Pacific lithospheric plate reflects the interplate interaction in the subduction zone.","PeriodicalId":34500,"journal":{"name":"Geosistemy perekhodnykh zon","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45186577","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 : 2022-01-01DOI: 10.30730/gtrz.2022.6.3.183-194
O. Nikitenko, V. Ershov, R. Zharkov, G. Ustyugov
The paper presents the results of studies (2017 and 2019) of the physicochemical characteristics of the thermomineral waters of the Daginsky field, obtained before the reconstruction of the springs in 2019–2020. The obtained data were compared with the data from the studies of previous years (1958–2014) in order to study the dynamics of the measured indicators in over time. It was found that the waters of the Daginsky field are characterized by the constancy of the chemical composition and reservoir temperatures calculated by means of hydrochemical geothermometers. This fact indicates a stable hydrogeological regime of the field. For many years, spatial hydrogeochemical heterogeneity has also been preserved within the field, which consists in the differences in some physicochemical indicators (surface temperatures, concentrations of Na+, Cl–, SO42–, HCO3–, etc.) of the thermomineral waters discharged in different sites (Northern, Central, Southern). It is shown that the content of microcomponents (B, Br–, Li+) in the studied waters, which were measured in different laboratories (or with different methods of chemical analysis) can differ significantly. The most reliable estimates of reservoir temperatures of the Daginsky field are obtained using Na-K, K-Mg and SiO2 hydrochemical geothermometers. The reservoir temperatures mainly range from 60 to100 °С, which corresponds to a circulation depth of the thermomineral waters of about 2–3 km. These researches provide a basis for the studying the further dynamics of hydrogeochemical indicators of the Daginsky field, including after the reconstruction of the thermomineral springs.
{"title":"Dynamics of the physicochemical characteristics of the thermomineral waters of the Daginsky field (before the reconstruction of the springs in 2019–2020)","authors":"O. Nikitenko, V. Ershov, R. Zharkov, G. Ustyugov","doi":"10.30730/gtrz.2022.6.3.183-194","DOIUrl":"https://doi.org/10.30730/gtrz.2022.6.3.183-194","url":null,"abstract":"The paper presents the results of studies (2017 and 2019) of the physicochemical characteristics of the thermomineral waters of the Daginsky field, obtained before the reconstruction of the springs in 2019–2020. The obtained data were compared with the data from the studies of previous years (1958–2014) in order to study the dynamics of the measured indicators in over time. It was found that the waters of the Daginsky field are characterized by the constancy of the chemical composition and reservoir temperatures calculated by means of hydrochemical geothermometers. This fact indicates a stable hydrogeological regime of the field. For many years, spatial hydrogeochemical heterogeneity has also been preserved within the field, which consists in the differences in some physicochemical indicators (surface temperatures, concentrations of Na+, Cl–, SO42–, HCO3–, etc.) of the thermomineral waters discharged in different sites (Northern, Central, Southern). It is shown that the content of microcomponents (B, Br–, Li+) in the studied waters, which were measured in different laboratories (or with different methods of chemical analysis) can differ significantly. The most reliable estimates of reservoir temperatures of the Daginsky field are obtained using Na-K, K-Mg and SiO2 hydrochemical geothermometers. The reservoir temperatures mainly range from 60 to100 °С, which corresponds to a circulation depth of the thermomineral waters of about 2–3 km. These researches provide a basis for the studying the further dynamics of hydrogeochemical indicators of the Daginsky field, including after the reconstruction of the thermomineral springs.","PeriodicalId":34500,"journal":{"name":"Geosistemy perekhodnykh zon","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69579196","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 : 2022-01-01DOI: 10.30730/gtrz.2022.6.3.237-245
F. A. Romanyuk, D. Kozlov, R. Zharkov
Data on the morphology of the lake basins of three Novikovskiye Karyernye lakes, formed after the completion of coal mining at the Novikovo brown coal field with germanium-bearing coals (Novikovo village, Korsakov district of the Sakhalin region) were considered for the first time in the work. Bathymetric profiles and schemes with isobats made using interpolation of data from 29 high resolution echo-sounder profiles with a total length of about 25 km are given in the article. Morphometric indices of the lakes are calculated; the morphological appearance of their basins is described. The data on the depths and chemical composition of Biryuzovoye Karyernoye lake – the deepest waterbody on Sakhalin Island – are updated. The comparative characteristics of the lakes have been carried out.
{"title":"First results of field work in 2021 on the group of Novikovskiye Karyernye lakes (Sakhalin Island): morphology and morphometric parameters of basins","authors":"F. A. Romanyuk, D. Kozlov, R. Zharkov","doi":"10.30730/gtrz.2022.6.3.237-245","DOIUrl":"https://doi.org/10.30730/gtrz.2022.6.3.237-245","url":null,"abstract":"Data on the morphology of the lake basins of three Novikovskiye Karyernye lakes, formed after the completion of coal mining at the Novikovo brown coal field with germanium-bearing coals (Novikovo village, Korsakov district of the Sakhalin region) were considered for the first time in the work. Bathymetric profiles and schemes with isobats made using interpolation of data from 29 high resolution echo-sounder profiles with a total length of about 25 km are given in the article. Morphometric indices of the lakes are calculated; the morphological appearance of their basins is described. The data on the depths and chemical composition of Biryuzovoye Karyernoye lake – the deepest waterbody on Sakhalin Island – are updated. The comparative characteristics of the lakes have been carried out.","PeriodicalId":34500,"journal":{"name":"Geosistemy perekhodnykh zon","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69579251","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 : 2022-01-01DOI: 10.30730/gtrz.2022.6.4.328-338
A. Degterev, M. Chibisova
Chikurachki volcano located in the southern part of Paramushir Island (Northern Kuriles) was in a state of increased activity from January to October 2022. According to satellite data and the results of visual observations, at least 5 episodes of explosive activity, lasting from 2 to 8 days: January 30 – February 03, June 23–24, June 30 – 01 July, August 21 – September 02, October 13–20 were recorded. All observed events were similar to previous volcanic eruptions in their nature and duration, among which weak and moderate vulcanian eruptions prevailed: both single emissions and series of explosions to a height of 2–5 km a.s.l., as well as periods of relatively calm ash and gas mixture emission of various intensity were observed. Ash plumes and clouds spread mainly in the east, south, southeast, northeast and southwest directions, their length reached 790 km, and the area was 25 408 km2 (15 October, 2022).
{"title":"The explosive activity of Chikurachki volcano in January–October 2022 (Paramushir Island, Northern Kuriles)","authors":"A. Degterev, M. Chibisova","doi":"10.30730/gtrz.2022.6.4.328-338","DOIUrl":"https://doi.org/10.30730/gtrz.2022.6.4.328-338","url":null,"abstract":"Chikurachki volcano located in the southern part of Paramushir Island (Northern Kuriles) was in a state of increased activity from January to October 2022. According to satellite data and the results of visual observations, at least 5 episodes of explosive activity, lasting from 2 to 8 days: January 30 – February 03, June 23–24, June 30 – 01 July, August 21 – September 02, October 13–20 were recorded. All observed events were similar to previous volcanic eruptions in their nature and duration, among which weak and moderate vulcanian eruptions prevailed: both single emissions and series of explosions to a height of 2–5 km a.s.l., as well as periods of relatively calm ash and gas mixture emission of various intensity were observed. Ash plumes and clouds spread mainly in the east, south, southeast, northeast and southwest directions, their length reached 790 km, and the area was 25 408 km2 (15 October, 2022).","PeriodicalId":34500,"journal":{"name":"Geosistemy perekhodnykh zon","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69579341","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 : 2022-01-01DOI: 10.30730/gtrz.2022.6.4.380-387
A. K. Ezhkin
The paper presents the results of studying soil lichens in areas of thermal habitats on the Kuril Islands, including the features of lichen distribution on the isles. Totally four species of epigeic lichens were found when studying the thermal fields on Kunashir and Iturup isles: Cladonia graciliformis, C. granulans, C. vulcani, and C. furcata. First three species are closest to active fumaroles and have the highest rates of occurrence frequency for these habitats.
{"title":"Epigeic lichens in thermal habitats on the Southern Kuriles","authors":"A. K. Ezhkin","doi":"10.30730/gtrz.2022.6.4.380-387","DOIUrl":"https://doi.org/10.30730/gtrz.2022.6.4.380-387","url":null,"abstract":"The paper presents the results of studying soil lichens in areas of thermal habitats on the Kuril Islands, including the features of lichen distribution on the isles. Totally four species of epigeic lichens were found when studying the thermal fields on Kunashir and Iturup isles: Cladonia graciliformis, C. granulans, C. vulcani, and C. furcata. First three species are closest to active fumaroles and have the highest rates of occurrence frequency for these habitats.","PeriodicalId":34500,"journal":{"name":"Geosistemy perekhodnykh zon","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69578984","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 : 2022-01-01DOI: 10.30730/gtrz.2022.6.3.246-255
G. Shevchenko, A. Tsoy
Based on the known data on the amplitudes and phases of the main tidal waves in coastal areas of southwestern Kamchatka, their alongshore variability was analyzed. It is shown that they increase from south to north. However, it is difficult to accurately assess these variations due to the fact that coastal tide gauges, which were usually installed at the mouths of rivers, are affected by the distorting effect of bottom friction. Satellite altimetry data were used for a more accurate characterization of the spatial variability of tide magnitude. These data were obtained during the passes of the TOPEX/Poseidon satellite in 1992–2002 on the original and 2002–2005 on the orbits shifted by half the inter-track distance. The amplitudes of both diurnal and semidiurnal waves have been revealed to increase sharply in the north direction, and this increase is limited by the shelf zone of southwestern Kamchatka. Significant spatial variations in the tidal wave characteristics are the cause of strong alongshore currents in this area. Estimates obtained on the basis of calculating the difference in the tidal level at the points of various sub-satellite tracks have shown that the speed of the coastal flow can reach 1−1.3 knot. The main contribution to the formation of tidal currents is made by diurnal components.
{"title":"Spatial structure of the tides near the southwestern coast of Kamchatka according to coastal observations and satellite altimetry data","authors":"G. Shevchenko, A. Tsoy","doi":"10.30730/gtrz.2022.6.3.246-255","DOIUrl":"https://doi.org/10.30730/gtrz.2022.6.3.246-255","url":null,"abstract":"Based on the known data on the amplitudes and phases of the main tidal waves in coastal areas of southwestern Kamchatka, their alongshore variability was analyzed. It is shown that they increase from south to north. However, it is difficult to accurately assess these variations due to the fact that coastal tide gauges, which were usually installed at the mouths of rivers, are affected by the distorting effect of bottom friction. Satellite altimetry data were used for a more accurate characterization of the spatial variability of tide magnitude. These data were obtained during the passes of the TOPEX/Poseidon satellite in 1992–2002 on the original and 2002–2005 on the orbits shifted by half the inter-track distance. The amplitudes of both diurnal and semidiurnal waves have been revealed to increase sharply in the north direction, and this increase is limited by the shelf zone of southwestern Kamchatka. Significant spatial variations in the tidal wave characteristics are the cause of strong alongshore currents in this area. Estimates obtained on the basis of calculating the difference in the tidal level at the points of various sub-satellite tracks have shown that the speed of the coastal flow can reach 1−1.3 knot. The main contribution to the formation of tidal currents is made by diurnal components.","PeriodicalId":34500,"journal":{"name":"Geosistemy perekhodnykh zon","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69579259","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 : 2022-01-01DOI: 10.30730/gtrz.2022.6.1.005-012
Yu.V. Kostrov, P. Kamenev, V. A. Degtyarev
Structural and geological studies were carried out as part of a comprehensive field research for studying the geological and structural characteristics in the area of the village of Boshnyakovo – the town of Shakhtyorsk (the Uglegorsky district, Sakhalin Island). It is shown that the change of the structural-facies zones of the Cenozoic section (from the Middle Eocene to the Lower Miocene) occurs in the Onnai – Goncharovka interfluve. Large slickensides have been documented in the supposed zone of the Lesogorsk-Uglegorsk earthquake of 1924 with MLH = 7.0. Detailed measurements of the spatial orientation of slickensides were carried out in order to reconstruct tectonic stresses by tectonophysical methods. There is a predominance of horizontal extension in the structure of the studied slickensides, less often horizontal extension in combination with shear.
{"title":"Structural and geological study of the zone of influence of the central part of the West Sakhalin fault","authors":"Yu.V. Kostrov, P. Kamenev, V. A. Degtyarev","doi":"10.30730/gtrz.2022.6.1.005-012","DOIUrl":"https://doi.org/10.30730/gtrz.2022.6.1.005-012","url":null,"abstract":"Structural and geological studies were carried out as part of a comprehensive field research for studying the geological and structural characteristics in the area of the village of Boshnyakovo – the town of Shakhtyorsk (the Uglegorsky district, Sakhalin Island). It is shown that the change of the structural-facies zones of the Cenozoic section (from the Middle Eocene to the Lower Miocene) occurs in the Onnai – Goncharovka interfluve. Large slickensides have been documented in the supposed zone of the Lesogorsk-Uglegorsk earthquake of 1924 with MLH = 7.0. Detailed measurements of the spatial orientation of slickensides were carried out in order to reconstruct tectonic stresses by tectonophysical methods. There is a predominance of horizontal extension in the structure of the studied slickensides, less often horizontal extension in combination with shear.","PeriodicalId":34500,"journal":{"name":"Geosistemy perekhodnykh zon","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69578519","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 : 2022-01-01DOI: 10.30730/gtrz.2022.6.2.100-113
N. Razjigaeva, L. Ganzey, K. Arslanov, N. Pshenichnikova
The Late Holocene phases of aeolian processes have been reconstructed on the basis of dune fields construction. The palaeoenvironmental studies were targeted to following problems: 1) to determine the periods of higher and lower activity of aeolian processes; 2) to establish the age of aeolian deposits and buried soils; 3) to retrace the development of coastal landscapes. The age was determined by radiocarbon dating of paleosols and tephrostratigraphy. The correlation of tephra was performed using data on the volcanic glass chemical composition. The dunes formed during the cooling accompanied by a minor regression. Six buried soils found in the dunes reflect stabilization and overgrowing of dune fields. The longest period of dune stabilization began after a cold event 2800–2600 cal yr BP and lasted until the Little Ice Age. Paleosols contain the tephra of large volcanic eruptions on Urup (Kolokol volcano), Simushir (Zavaritsky volcano) and Iturup (tephra). Pollen analysis allows us to retrace the development of coastal landscapes. Thickets of dwarf pine developed during cooling, birch forests spread in the Medieval Warm Period, and herb meadows were widely represented on the dunes. Human impact on the coastal palaeovegetation was found. Aeolian sedimentation was high during the Little Ice Age. One of the factors of dune reactivation during the Little Ice Age was increased winter storminess associated with the East Asian winter monsoon. Evidence of active cyclogenesis is the increasing proportion of allochthonous pollen. The modern reactivation of aeolian processes is associated with human activity and storm erosion of dunes.
{"title":"Coastal dunes of Urup Island (Kuril Islands, North-Western Pacific): palaeoclimatic and environmental archive","authors":"N. Razjigaeva, L. Ganzey, K. Arslanov, N. Pshenichnikova","doi":"10.30730/gtrz.2022.6.2.100-113","DOIUrl":"https://doi.org/10.30730/gtrz.2022.6.2.100-113","url":null,"abstract":"The Late Holocene phases of aeolian processes have been reconstructed on the basis of dune fields construction. The palaeoenvironmental studies were targeted to following problems: 1) to determine the periods of higher and lower activity of aeolian processes; 2) to establish the age of aeolian deposits and buried soils; 3) to retrace the development of coastal landscapes. The age was determined by radiocarbon dating of paleosols and tephrostratigraphy. The correlation of tephra was performed using data on the volcanic glass chemical composition. The dunes formed during the cooling accompanied by a minor regression. Six buried soils found in the dunes reflect stabilization and overgrowing of dune fields. The longest period of dune stabilization began after a cold event 2800–2600 cal yr BP and lasted until the Little Ice Age. Paleosols contain the tephra of large volcanic eruptions on Urup (Kolokol volcano), Simushir (Zavaritsky volcano) and Iturup (tephra). Pollen analysis allows us to retrace the development of coastal landscapes. Thickets of dwarf pine developed during cooling, birch forests spread in the Medieval Warm Period, and herb meadows were widely represented on the dunes. Human impact on the coastal palaeovegetation was found. Aeolian sedimentation was high during the Little Ice Age. One of the factors of dune reactivation during the Little Ice Age was increased winter storminess associated with the East Asian winter monsoon. Evidence of active cyclogenesis is the increasing proportion of allochthonous pollen. The modern reactivation of aeolian processes is associated with human activity and storm erosion of dunes.","PeriodicalId":34500,"journal":{"name":"Geosistemy perekhodnykh zon","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69578880","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 : 2022-01-01DOI: 10.30730/gtrz.2022.6.2.124-129
R. Bulgakov
Vertical motions, especially in the active continental margins such as Kuril-Kamchatka transition zone, are still pure studied. One of the factors significantly affecting the amplitudes and directions of vertical motions is mantle convections. Estimates of the amplitudes of vertical motions in region have been obtained by means of numerical modeling of the mantle convection made by the method of finite elements. The values of emergences in the area of Sakhalin Island and the Kuril Ridge from 0–3 to 13 m were obtained with the accepted rates of mantle convection from 1 to 5 mm/year. The results obtained should be taken into account when reconstructing neotectonic history of the region and assessing the geodynamic situation in the region of the Sea of Okhotsk.
{"title":"Vertical motion modeling as a result of mantle convection on the Sea of Okhotsk profile","authors":"R. Bulgakov","doi":"10.30730/gtrz.2022.6.2.124-129","DOIUrl":"https://doi.org/10.30730/gtrz.2022.6.2.124-129","url":null,"abstract":"Vertical motions, especially in the active continental margins such as Kuril-Kamchatka transition zone, are still pure studied. One of the factors significantly affecting the amplitudes and directions of vertical motions is mantle convections. Estimates of the amplitudes of vertical motions in region have been obtained by means of numerical modeling of the mantle convection made by the method of finite elements. The values of emergences in the area of Sakhalin Island and the Kuril Ridge from 0–3 to 13 m were obtained with the accepted rates of mantle convection from 1 to 5 mm/year. The results obtained should be taken into account when reconstructing neotectonic history of the region and assessing the geodynamic situation in the region of the Sea of Okhotsk.","PeriodicalId":34500,"journal":{"name":"Geosistemy perekhodnykh zon","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69578951","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 : 2022-01-01DOI: 10.30730/gtrz.2022.6.2.136-140
Y. Poltev, T. G. Koreneva, V. E. Maryzhikhin, I.V. Syrbu
The content of Fe, As, Cu, Mn, Cr, Ni, Pb, Hg and Cd in the muscles and gonads of the Pacific capelin sampled in 2020 in the coastal waters of the southwestern part of Sakhalin Island was estimated. The highest content of As is noted in muscles, Mn – in fish eggs, Hg – in muscles and milt. The content of trace elements in fish muscles and gonads decreases in the range Fe – Cd or Hg. The concentrations of normalized toxic elements Pb, Cd, As and Hg in the muscles and gonads of the Pacific capelin are safe according to hygienic requirements for food products. The data obtained indirectly indicate a favorable ecological situation in terms of the content of normalized toxic elements in the waters near southwest Sakhalin.
{"title":"The content of trace elements in the Pacific capelin Mallotus catervarius (Pisces: Osmeridae) from the coastal waters of the southwestern part of Sakhalin Island","authors":"Y. Poltev, T. G. Koreneva, V. E. Maryzhikhin, I.V. Syrbu","doi":"10.30730/gtrz.2022.6.2.136-140","DOIUrl":"https://doi.org/10.30730/gtrz.2022.6.2.136-140","url":null,"abstract":"The content of Fe, As, Cu, Mn, Cr, Ni, Pb, Hg and Cd in the muscles and gonads of the Pacific capelin sampled in 2020 in the coastal waters of the southwestern part of Sakhalin Island was estimated. The highest content of As is noted in muscles, Mn – in fish eggs, Hg – in muscles and milt. The content of trace elements in fish muscles and gonads decreases in the range Fe – Cd or Hg. The concentrations of normalized toxic elements Pb, Cd, As and Hg in the muscles and gonads of the Pacific capelin are safe according to hygienic requirements for food products. The data obtained indirectly indicate a favorable ecological situation in terms of the content of normalized toxic elements in the waters near southwest Sakhalin.","PeriodicalId":34500,"journal":{"name":"Geosistemy perekhodnykh zon","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69579048","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}
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