Pub Date : 2021-01-01DOI: 10.26516/2541-9641.2021.1.41
Y. Ailow, S. Rasskazov, T. Yasnygina, I. Chuvashova, Zhenhua Xie, Yi‐min Sun
In terms of petrochemical and trace-element data, basalts from the axial rift valley are suggested to originate from sources of the sub-continental lithospheric mantle, inhomogeneity of which was due to extracting upper and lower crustal components. Trace-element modeling indicated 3-8 %partial melting of apatite-bearing sources with varying garnet and clinopyroxene proportions.
{"title":"Basalts of the Bystraya zone from sources of sub-continental lithospheric mantle: the Tunka valley of the Baikal Rift System","authors":"Y. Ailow, S. Rasskazov, T. Yasnygina, I. Chuvashova, Zhenhua Xie, Yi‐min Sun","doi":"10.26516/2541-9641.2021.1.41","DOIUrl":"https://doi.org/10.26516/2541-9641.2021.1.41","url":null,"abstract":"In terms of petrochemical and trace-element data, basalts from the axial rift valley are suggested to originate from sources of the sub-continental lithospheric mantle, inhomogeneity of which was due to extracting upper and lower crustal components. Trace-element modeling indicated 3-8 %partial melting of apatite-bearing sources with varying garnet and clinopyroxene proportions.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78484272","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 : 2021-01-01DOI: 10.26516/2541-9641.2021.1.16
I. Chuvashova, R. Alokla, S. Rasskazov
Clay tonsils mark permeable porous boundaries of basaltic flows. Poor penetration of water is expressed in local occurrence of smectite-sepiolite tonsils with admixtures of halloysite and polygorskite. Increasing water infiltration that results in complete filling of pores and cavities in basalts by the same clay minerals is accompanied by the entry of a goethite admixture. Mature weathering crust on basalts is characterized by smectite-goethite composition without sepiolite. The cryptic clay mineralization of permeable basalt layers might result in overestimating ages in K-Ar system and distortion of primary geochemical signatures of volcanic rocks.
{"title":"Infiltration of clay into pores and cavities of Neogene basalts from Eastern Sayans","authors":"I. Chuvashova, R. Alokla, S. Rasskazov","doi":"10.26516/2541-9641.2021.1.16","DOIUrl":"https://doi.org/10.26516/2541-9641.2021.1.16","url":null,"abstract":"Clay tonsils mark permeable porous boundaries of basaltic flows. Poor penetration of water is expressed in local occurrence of smectite-sepiolite tonsils with admixtures of halloysite and polygorskite. Increasing water infiltration that results in complete filling of pores and cavities in basalts by the same clay minerals is accompanied by the entry of a goethite admixture. Mature weathering crust on basalts is characterized by smectite-goethite composition without sepiolite. The cryptic clay mineralization of permeable basalt layers might result in overestimating ages in K-Ar system and distortion of primary geochemical signatures of volcanic rocks.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81704868","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 : 2021-01-01DOI: 10.26516/2541-9641.2021.1.59
А. Hassan, S. Rasskazov, I. Chuvashova, A. Al-hamud
The central part of the Baikal Rift System is exhibited by the lacustrine South Baikal basin and land Barguzin and Tunka valleys. In the Late Cenozoic, the former valley developed consistently with the South Baikal basin as its distal extensional pattern, the latter underwent both extension and compression as an individual structure of the Hangay-Belaya orogenic zone.
{"title":"Structural development of the central Baikal Rift System: similarities and differences of the Barguzin and Tunka valleys","authors":"А. Hassan, S. Rasskazov, I. Chuvashova, A. Al-hamud","doi":"10.26516/2541-9641.2021.1.59","DOIUrl":"https://doi.org/10.26516/2541-9641.2021.1.59","url":null,"abstract":"The central part of the Baikal Rift System is exhibited by the lacustrine South Baikal basin and land Barguzin and Tunka valleys. In the Late Cenozoic, the former valley developed consistently with the South Baikal basin as its distal extensional pattern, the latter underwent both extension and compression as an individual structure of the Hangay-Belaya orogenic zone.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77114904","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 : 2021-01-01DOI: 10.26516/2541-9641.2021.1.27
V. Kolomiets, R.C. Budaev, A.V. Bujanov
On the right bank of Selenga River, terraces as high as 60–65 m are composed of aleuritic-sandy sorted sediments with a small admixture of non-rounded and slightly-rounded coarse material. The sediments are sorted with subhorizontal and inclined stratification. Sedimentary rocks with common structural and textural characteristics show different genesis: in the Ust’-Dzhida basin mainly lacustrine-alluvial, with an admixture of river and slope material, in the Gusinoozerskaya basin – alluvial with the formation of non-channeled and floodplain facies.
{"title":"Genesis of Sediments from high Terraces in Selenga River, the Ust’-Dzhida and Gusinoozerskaya Basins of Western Transbaikal","authors":"V. Kolomiets, R.C. Budaev, A.V. Bujanov","doi":"10.26516/2541-9641.2021.1.27","DOIUrl":"https://doi.org/10.26516/2541-9641.2021.1.27","url":null,"abstract":"On the right bank of Selenga River, terraces as high as 60–65 m are composed of aleuritic-sandy sorted sediments with a small admixture of non-rounded and slightly-rounded coarse material. The sediments are sorted with subhorizontal and inclined stratification. Sedimentary rocks with common structural and textural characteristics show different genesis: in the Ust’-Dzhida basin mainly lacustrine-alluvial, with an admixture of river and slope material, in the Gusinoozerskaya basin – alluvial with the formation of non-channeled and floodplain facies.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81599700","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 : 2021-01-01DOI: 10.26516/2541-9641.2021.1.7
S. Rasskazov, V. Kolomiets, R. Budaev, I. Chuvashova, A. Al-Hamoud, A. Hassan, R. Alokla
From the analysis of spatial-temporal distribution of sediments in the south of East Siberia, we present evidence on two stages in the evolution of neotectonic structure: Cretaceous-Paleogene and Neogene-Quaternary. The former was exhibited by formation of the South Baikal orogen accompanied by flank development of the Predbaikal and Selenga-Vitim foredeeps, the latter by the subsidence of the South Baikal basin, its filling of sediments and water simultaneously with the development of the whole Baikal Rift System.
{"title":"Recent reactivation of the Siberian craton suture zone under Southern Baikal: from Cretaceous-Paleogene orogen to Neogene-Quaternary rift","authors":"S. Rasskazov, V. Kolomiets, R. Budaev, I. Chuvashova, A. Al-Hamoud, A. Hassan, R. Alokla","doi":"10.26516/2541-9641.2021.1.7","DOIUrl":"https://doi.org/10.26516/2541-9641.2021.1.7","url":null,"abstract":"From the analysis of spatial-temporal distribution of sediments in the south of East Siberia, we present evidence on two stages in the evolution of neotectonic structure: Cretaceous-Paleogene and Neogene-Quaternary. The former was exhibited by formation of the South Baikal orogen accompanied by flank development of the Predbaikal and Selenga-Vitim foredeeps, the latter by the subsidence of the South Baikal basin, its filling of sediments and water simultaneously with the development of the whole Baikal Rift System.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81348756","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 : 2021-01-01DOI: 10.26516/2541-9641.2021.1.111
S. Kovalenko, A. Kitov, E. Ivanov, E. V. Lihtarovich
During the summer and autumn expeditions of the student-faculty club "Portulan" to the Munku-Sardyk area in 2015-2016, river and near-slope icings, sloping landforms, and the processes that create the latter were studied in the White Irkut, Bugovek, Muguvek, Middle Irkut, Zhohoy river valleys. Regime bench marks that fix icing heights were instoled.
{"title":"Club Portulan Expeditions to the Munku-Sardyk area in 2014-2016","authors":"S. Kovalenko, A. Kitov, E. Ivanov, E. V. Lihtarovich","doi":"10.26516/2541-9641.2021.1.111","DOIUrl":"https://doi.org/10.26516/2541-9641.2021.1.111","url":null,"abstract":"During the summer and autumn expeditions of the student-faculty club \"Portulan\" to the Munku-Sardyk area in 2015-2016, river and near-slope icings, sloping landforms, and the processes that create the latter were studied in the White Irkut, Bugovek, Muguvek, Middle Irkut, Zhohoy river valleys. Regime bench marks that fix icing heights were instoled.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84188028","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 : 2021-01-01DOI: 10.26516/2541-9641.2021.1.94
V. Novoselov, S. V. Snopkov
At the initial stage of the hydrocarbon study in the Baikal and the Baikal region, information about the signs of oil and gas was recorded. The occurence of hydrocarbons has been found after the oily spots on the lake water and ozokerite finds on the lake shores. By the end of the XIX century, no serious attempts to explor this natural resource have been taken.
{"title":"Initial study of the Baikal oil","authors":"V. Novoselov, S. V. Snopkov","doi":"10.26516/2541-9641.2021.1.94","DOIUrl":"https://doi.org/10.26516/2541-9641.2021.1.94","url":null,"abstract":"At the initial stage of the hydrocarbon study in the Baikal and the Baikal region, information about the signs of oil and gas was recorded. The occurence of hydrocarbons has been found after the oily spots on the lake water and ozokerite finds on the lake shores. By the end of the XIX century, no serious attempts to explor this natural resource have been taken.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90761607","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 : 1900-01-01DOI: 10.26516/2541-9641.2022.4.141
A.M. Rogachev, V.G. Skopintsev, T.N. Rogacheva, M.A. Rogachev
Four periods of geological study and development of the southeastern part of the East Sayan are considered. Significant, but scattered exploration allows to speak about the positive prospects of the area, while maintaining a high potential for discovering new interesting industrial gold objects.
{"title":"История изученности золотоносности бурятской части Алтае-Саянской металлогенической провинции","authors":"A.M. Rogachev, V.G. Skopintsev, T.N. Rogacheva, M.A. Rogachev","doi":"10.26516/2541-9641.2022.4.141","DOIUrl":"https://doi.org/10.26516/2541-9641.2022.4.141","url":null,"abstract":"Four periods of geological study and development of the southeastern part of the East Sayan are considered. Significant, but scattered exploration allows to speak about the positive prospects of the area, while maintaining a high potential for discovering new interesting industrial gold objects.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83987534","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 : 1900-01-01DOI: 10.26516/2541-9641.2023.1.97
I. Chuvashova, A. Ilyasova
Monitoring results of the thermophilic trace element element Li and related macrocomponents Cl and S in groundwaters from station 27 in the Kultuk polygon. The dependence of their variations on earthquakes and aftershocks of the 2020–2022 Baikal-Khubsugul reactivation is established. From Na/Li geothermometry, 234U/238U activity ratio, and 234U activity, groundwater sources in a deep reservoir with a temperature as high as 100 °C or more under crust stretching and those with a temperature as low as 8 °C under crust compression are designated. Phases of stabilization, increase and decrease in groundwater temperature are deciphered in the course of the development of a complete seismogeodynamic cycle of compression and extension of the crust.
{"title":"Coseismic variations of Li in groundwaters from station 27 of the Kultuk polygon","authors":"I. Chuvashova, A. Ilyasova","doi":"10.26516/2541-9641.2023.1.97","DOIUrl":"https://doi.org/10.26516/2541-9641.2023.1.97","url":null,"abstract":"Monitoring results of the thermophilic trace element element Li and related macrocomponents Cl and S in groundwaters from station 27 in the Kultuk polygon. The dependence of their variations on earthquakes and aftershocks of the 2020–2022 Baikal-Khubsugul reactivation is established. From Na/Li geothermometry, 234U/238U activity ratio, and 234U activity, groundwater sources in a deep reservoir with a temperature as high as 100 °C or more under crust stretching and those with a temperature as low as 8 °C under crust compression are designated. Phases of stabilization, increase and decrease in groundwater temperature are deciphered in the course of the development of a complete seismogeodynamic cycle of compression and extension of the crust.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78943555","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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