Pub Date : 2023-01-01DOI: 10.26516/2541-9641.2023.1.124
E. Chebykin, S. Rasskazov
Monitoring series of the Na/Li thermophilic ratio in groundwater obtained at the station 27 of the Kultuk polygon in 2012–2022 is compared with those of the Si thermophilic element concentrations. Discrepancies in time variations of calculated temperatures are used to identify reservoir groundwater components that exhibit a hydrogeodynamic center subjected to coseismic generation of friction clay.
{"title":"Comparative study of coseismic changes in thermophilic elements Si, Na, and Li in groundwaters from station 27 in the Kultuk polygon, Lake Baikal","authors":"E. Chebykin, S. Rasskazov","doi":"10.26516/2541-9641.2023.1.124","DOIUrl":"https://doi.org/10.26516/2541-9641.2023.1.124","url":null,"abstract":"Monitoring series of the Na/Li thermophilic ratio in groundwater obtained at the station 27 of the Kultuk polygon in 2012–2022 is compared with those of the Si thermophilic element concentrations. Discrepancies in time variations of calculated temperatures are used to identify reservoir groundwater components that exhibit a hydrogeodynamic center subjected to coseismic generation of friction clay.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78899201","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 : 2023-01-01DOI: 10.26516/2541-9641.2023.3.105
S.V. Rasskazov, I.S. Chuvashova
The history of getting ideas on the structure and development of the Baikal system of basins and its most important structural elements is conventionally divided into stages of putting forward: 1) initial hypotheses that appeared before the 1960s, 2) numerous hypotheses associated with a large amount of work performed in connection with the development of the rifting problems in the south of Eastern Siberia in the 1960–1990s, and 3) latest hypotheses that resulted from new facts obtained through new approaches implemented in geological studies of the 2000–2020s.
{"title":"Initial substantiation and subsequent perception of hypotheses on structure and development of the Baikal system of basins","authors":"S.V. Rasskazov, I.S. Chuvashova","doi":"10.26516/2541-9641.2023.3.105","DOIUrl":"https://doi.org/10.26516/2541-9641.2023.3.105","url":null,"abstract":"The history of getting ideas on the structure and development of the Baikal system of basins and its most important structural elements is conventionally divided into stages of putting forward: 1) initial hypotheses that appeared before the 1960s, 2) numerous hypotheses associated with a large amount of work performed in connection with the development of the rifting problems in the south of Eastern Siberia in the 1960–1990s, and 3) latest hypotheses that resulted from new facts obtained through new approaches implemented in geological studies of the 2000–2020s.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135319176","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 : 2023-01-01DOI: 10.26516/2541-9641.2023.3.95
A.T. Korolkov
Meetings of graduates of various universities occur frequently. Geologists graduates meet especially regularly every 5 years. Every meeting is the joy of returning to youth. Many graduates have long been called by name and patronymic. Although after 50 years there are... grandparents, they call each other exclusively by their first names. Such a meeting is not just communication, but also summing up. Each course brings invaluable experience in its field. A review of this work activity shows how much the geologists graduates have done useful for the country. This should be known not only by representatives of Irkutsk State University and students, but also by a wide range of readers.
{"title":"Аchievements of geologists-graduates of the Irkutsk state university in 1973 (meeting in 50 years)","authors":"A.T. Korolkov","doi":"10.26516/2541-9641.2023.3.95","DOIUrl":"https://doi.org/10.26516/2541-9641.2023.3.95","url":null,"abstract":"Meetings of graduates of various universities occur frequently. Geologists graduates meet especially regularly every 5 years. Every meeting is the joy of returning to youth. Many graduates have long been called by name and patronymic. Although after 50 years there are... grandparents, they call each other exclusively by their first names. Such a meeting is not just communication, but also summing up. Each course brings invaluable experience in its field. A review of this work activity shows how much the geologists graduates have done useful for the country. This should be known not only by representatives of Irkutsk State University and students, but also by a wide range of readers.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135319160","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 : 2023-01-01DOI: 10.26516/2541-9641.2023.2.25
S.A. Lazarenko, S.V. Rasskazov, A.P. Opara
In the Nepa-Botuoba anteclise of the Siberian Platform, the Sosninsky swell-like fold-thrust structure is described that was formed, presumably, since the Late Devonian – Early Carboniferous under conditions of episodic displaying of significant tangential stresses from the southeast – i.e. from the structural heterogeneity of the Baikal-Patom highlands, which has formed in the Late Riphean. The effect of shear deformations occurred also. It is shown that tectonic displacements that were recognized along thick plastic layers of salt, caused a significant difference in the geological structure of the deformed lower-middle (supra-salt and saline) and undeformed lower (sub-salt) structural complexes of the Dulisma oil and gas condensate field.
{"title":"Expression of the Markovo-Ichera Dislocation Zone of the Nepa-Batuoba Anteclise in Geological Structure of the Dulisma Oilgascondensated Deposit","authors":"S.A. Lazarenko, S.V. Rasskazov, A.P. Opara","doi":"10.26516/2541-9641.2023.2.25","DOIUrl":"https://doi.org/10.26516/2541-9641.2023.2.25","url":null,"abstract":"In the Nepa-Botuoba anteclise of the Siberian Platform, the Sosninsky swell-like fold-thrust structure is described that was formed, presumably, since the Late Devonian – Early Carboniferous under conditions of episodic displaying of significant tangential stresses from the southeast – i.e. from the structural heterogeneity of the Baikal-Patom highlands, which has formed in the Late Riphean. The effect of shear deformations occurred also. It is shown that tectonic displacements that were recognized along thick plastic layers of salt, caused a significant difference in the geological structure of the deformed lower-middle (supra-salt and saline) and undeformed lower (sub-salt) structural complexes of the Dulisma oil and gas condensate field.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135319175","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}
The results of prospecting studies of trace elements and activity ratio 234U/238U (АR4/8) in surface waters and groundwaters from the Listvyanka, Buguldeyka, and Olkhon-Priolkhonye polygons of integrated monitoring, organized since 2020, are presented. At the Listvyanka polygon, wide interval of АR4/8 from 1.67 to 2.5 is obtained for groundwater in the Bolshie Koty village, at the Buguldeyka and Olkhon-Priolkhonye polygons that are located in the zone of the Primorsky fault – an interval of AR4/8 from 1.25 to 2.70. These values is general characteristic of large active faults of the central Baikal Rift Zone. Water from the Buguldeyka River differs in terms of both trace element compositions and AR4/8 values from those of its tributary Kurtun due to location of these rivers basins in rocks of the exposed basement of the Siberian Platform and its sedimentary cover, including evaporate carbonate sediments. On the Olkhon island, determined is groundwater that differs in elemental composition from the deep Baikal water.
{"title":"Development of the Listvyanka, Buguldeyka, and Olkhon-Priolkhonye Monitoring Polygons of the Baikal: Prospecting Study of Trace Elements and U Isotopes in Waters from Rivers and Groundwaters","authors":"E.P. Chebykin, S.V. Rasskazov, A.M. Ilyasova, S.V. Snopkov, S.N. Kovalenko","doi":"10.26516/2541-9641.2023.2.36","DOIUrl":"https://doi.org/10.26516/2541-9641.2023.2.36","url":null,"abstract":"The results of prospecting studies of trace elements and activity ratio 234U/238U (АR4/8) in surface waters and groundwaters from the Listvyanka, Buguldeyka, and Olkhon-Priolkhonye polygons of integrated monitoring, organized since 2020, are presented. At the Listvyanka polygon, wide interval of АR4/8 from 1.67 to 2.5 is obtained for groundwater in the Bolshie Koty village, at the Buguldeyka and Olkhon-Priolkhonye polygons that are located in the zone of the Primorsky fault – an interval of AR4/8 from 1.25 to 2.70. These values is general characteristic of large active faults of the central Baikal Rift Zone. Water from the Buguldeyka River differs in terms of both trace element compositions and AR4/8 values from those of its tributary Kurtun due to location of these rivers basins in rocks of the exposed basement of the Siberian Platform and its sedimentary cover, including evaporate carbonate sediments. On the Olkhon island, determined is groundwater that differs in elemental composition from the deep Baikal water.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135319390","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 : 2023-01-01DOI: 10.26516/2541-9641.2023.1.72
A. Ilyasova, S. V. Snopkov
The results of monitoring concentrations of the thermophilic element Si in fresh subthermal and cold groundwaters from the Kultuk polygon with a temperature range at the output from ca. 0 to 20 °C are presented. A stepwise zonal increase in the Si concentration is recognized in groundwaters of the polygon centered at station 40. In this center of the Kultuk hydrothermal reservoir, the minimum temperature of 25 °С on September 17, 2014 (before the earthquakes of 2014–2015) and the maximum temperature of 60 °С on January 23, 2021 (11 days after the strongest Khubsugul earthquake Mw=6.8) is obtained using the chalcedony geothermometer. It is proposed that groundwater came from the deep Kultuk reservoir with elevated temperature during the strong Kultuk seismic reactivation (August 27, 2008 – January 04, 2011) and changed to those with a lower temperature during the weak Tolbazikha one (June 24, 2011 – October 11, 2012) reaching a temperature minimum by 2014. Then the inflow of groundwaters with elevated temperature was revived again during the preparation and implementation of the Baikal-Khubsugul seismic reactivation that was marked by strong earthquakes in 2020–2022.
{"title":"Coseismic temporal variations of thermophilic element Si in groundwaters from the SW coast of Lake Baikal in 2012–2022","authors":"A. Ilyasova, S. V. Snopkov","doi":"10.26516/2541-9641.2023.1.72","DOIUrl":"https://doi.org/10.26516/2541-9641.2023.1.72","url":null,"abstract":"The results of monitoring concentrations of the thermophilic element Si in fresh subthermal and cold groundwaters from the Kultuk polygon with a temperature range at the output from ca. 0 to 20 °C are presented. A stepwise zonal increase in the Si concentration is recognized in groundwaters of the polygon centered at station 40. In this center of the Kultuk hydrothermal reservoir, the minimum temperature of 25 °С on September 17, 2014 (before the earthquakes of 2014–2015) and the maximum temperature of 60 °С on January 23, 2021 (11 days after the strongest Khubsugul earthquake Mw=6.8) is obtained using the chalcedony geothermometer. It is proposed that groundwater came from the deep Kultuk reservoir with elevated temperature during the strong Kultuk seismic reactivation (August 27, 2008 – January 04, 2011) and changed to those with a lower temperature during the weak Tolbazikha one (June 24, 2011 – October 11, 2012) reaching a temperature minimum by 2014. Then the inflow of groundwaters with elevated temperature was revived again during the preparation and implementation of the Baikal-Khubsugul seismic reactivation that was marked by strong earthquakes in 2020–2022.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77984582","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 : 2023-01-01DOI: 10.26516/2541-9641.2023.1.52
S. Bornyakov, Yanshuang Guo, I. Panteleev, Yanqun Zhuo, A. Dobrynina, V. Sankov, D. Salko, A. Shagun, A. Karimova
This study is focused on analog modeling of the stick-slip process along an existing large fault in an elastic-viscoplastic model subjected to loading at a constant strain rate. Based on our model results and data from (Ma et al., 2012, 2014), we distinguish stable, meta-stable, and meta-instable stages of the stick-slip process (the latter includes the early and late sub-stages). Our experiments show that the fault is periodically reactivated by segmentation. We analysed this mechanism from one fault reactivation to another, and identified regressive and progressive trends of segmentation. The regressive segmentation takes place during the stable and meta-stable stages of the stick-slip process. Under regressive segmentation the number of active segments and their lengths are reduced. The progressive segmentation is initiated at the early meta-instable sub-stage of the stick-slip process. Its activity is desplayed by an increase in the number of active segments to a certain critical density, while their pattern becomes more chaotic. In the late sub-stage, number of segments decreases as they rapidly grow and join with each other to form larger active segments, up to full reactivation of the entire fault. For comparison with the model results, we interpret rock deformation monitoring records before the Bystroe earthquake. Our analysis confirms specific features of the anomalous rock deformation that are similar to the strain features observed along the model fault during the meta-instable stage. There are evidence to suggest that meta-instability of a fault is a potential candidate to short-term precursor of earthquakes.
本研究的重点是在恒定应变速率下加载的弹粘塑性模型中对现有大断层的粘滑过程进行模拟建模。根据我们的模型结果和(Ma et al.， 2012, 2014)的数据，我们区分了粘滑过程的稳定、亚稳定和亚不稳定阶段(后者包括早期和晚期子阶段)。我们的实验表明，通过分割可以周期性地重新激活故障。从一个断层到另一个断层，我们分析了这一机制，并确定了分段的后退和前进趋势。回归分割发生在粘滑过程的稳定和亚稳定阶段。在回归分割下，减少了活动片段的数量和长度。递进分段是在粘滑过程的早期元不稳定子阶段开始的。其活动性表现为活跃片段的数量增加到一定的临界密度，而它们的模式则变得更加混乱。在后期，分段数量减少，但它们迅速增长，并相互连接形成更大的活动分段，直至整个断层完全重新激活。为了与模型结果进行比较，我们解释了Bystroe地震前的岩石变形监测记录。我们的分析证实了异常岩石变形的具体特征与在元失稳阶段沿模型断层观察到的应变特征相似。有证据表明，断层的元不稳定性是地震短期前兆的潜在候选者。
{"title":"Stages of Stick-Slip Preparation on Precut Faults in Laboratory Models, and Verification of the Stages in Nature","authors":"S. Bornyakov, Yanshuang Guo, I. Panteleev, Yanqun Zhuo, A. Dobrynina, V. Sankov, D. Salko, A. Shagun, A. Karimova","doi":"10.26516/2541-9641.2023.1.52","DOIUrl":"https://doi.org/10.26516/2541-9641.2023.1.52","url":null,"abstract":"This study is focused on analog modeling of the stick-slip process along an existing large fault in an elastic-viscoplastic model subjected to loading at a constant strain rate. Based on our model results and data from (Ma et al., 2012, 2014), we distinguish stable, meta-stable, and meta-instable stages of the stick-slip process (the latter includes the early and late sub-stages). Our experiments show that the fault is periodically reactivated by segmentation. We analysed this mechanism from one fault reactivation to another, and identified regressive and progressive trends of segmentation. The regressive segmentation takes place during the stable and meta-stable stages of the stick-slip process. Under regressive segmentation the number of active segments and their lengths are reduced. The progressive segmentation is initiated at the early meta-instable sub-stage of the stick-slip process. Its activity is desplayed by an increase in the number of active segments to a certain critical density, while their pattern becomes more chaotic. In the late sub-stage, number of segments decreases as they rapidly grow and join with each other to form larger active segments, up to full reactivation of the entire fault. For comparison with the model results, we interpret rock deformation monitoring records before the Bystroe earthquake. Our analysis confirms specific features of the anomalous rock deformation that are similar to the strain features observed along the model fault during the meta-instable stage. There are evidence to suggest that meta-instability of a fault is a potential candidate to short-term precursor of earthquakes.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86122424","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 : 2023-01-01DOI: 10.26516/2541-9641.2023.3.149
I.S. Chuvashova, S.V. Rasskazov
The history of studying and dating the latest volcanism of the Baikal Rift System (BRS) is conventionally divided into stages: 1) until the 1950s (discovery of young volcanoes), 2) 1950–1960s (primary determination of the age of the Cenozoic volcanogenic-sedimentary sequences using paleontological data), 3) 1970–1980s (determination of sequence of volcanic strata in the development of relief and pioneering radioisotope dating of volcanic rocks), 4) 1980–2005 (growth of geochronological and geochemical data on volcanic areas of Asia), and 5) 2005–2023 (synthesis of geochronological and geochemical data). The breakthrough in studying and dating of latest volcanism in the BRS resulted in substantiation of the development of mantle melting anomalies in the Japan–Baikal Geodynamic Corridor (JBGC) and its overlap by the Indo-Asian Convergence Region. A breakthrough in studying and dating of volcanic rocks that occurred by 2012 was basically confirmed by mass 39Ar/40Ar dating of 2018 in Central Mongolia.
{"title":"Breakthrough in Research and Dating of Latest Volcanism in the Baikal Rift System and its Significance for Understanding Latest Geodynamics of Asia","authors":"I.S. Chuvashova, S.V. Rasskazov","doi":"10.26516/2541-9641.2023.3.149","DOIUrl":"https://doi.org/10.26516/2541-9641.2023.3.149","url":null,"abstract":"The history of studying and dating the latest volcanism of the Baikal Rift System (BRS) is conventionally divided into stages: 1) until the 1950s (discovery of young volcanoes), 2) 1950–1960s (primary determination of the age of the Cenozoic volcanogenic-sedimentary sequences using paleontological data), 3) 1970–1980s (determination of sequence of volcanic strata in the development of relief and pioneering radioisotope dating of volcanic rocks), 4) 1980–2005 (growth of geochronological and geochemical data on volcanic areas of Asia), and 5) 2005–2023 (synthesis of geochronological and geochemical data). The breakthrough in studying and dating of latest volcanism in the BRS resulted in substantiation of the development of mantle melting anomalies in the Japan–Baikal Geodynamic Corridor (JBGC) and its overlap by the Indo-Asian Convergence Region. A breakthrough in studying and dating of volcanic rocks that occurred by 2012 was basically confirmed by mass 39Ar/40Ar dating of 2018 in Central Mongolia.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135318728","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}
The purpose of this study is to establish relationship between a source for final eruptions on the Dzotol volcano and those for the whole preceded Late Cenozoic volcanism in the Dariganga field. Major oxides, trace elements, and Pb isotopic ratios in rocks of the volcanic field are indicative for generation of magmatic melts in a homogeneous mantle region. In final eruptions of the Dzotol volcano, rocks show, on the one hand, intermediate geochemical signatures relative to those of other Dariganga volcanic rocks, and, on the other hand, lower Pb isotope ratios. We infer that Dariganga volcanic rocks were derived due to deep degassing of the about 4.47 Ga protomantle and were dispersed at the asthenospheric–lithospheric boundary affected by transtension. The source for the final Dzotol rocks corresponded in depth to the central part of the magma-generating region and displayed the Pb-isotopic protomantle component, previously designated in rare Quaternary Dariganga rocks.
{"title":"Relationship between timing of earthquakes of the Baikal-Khubsugul reactivation and oxidation–redox potential in groundwaters from the Kultuk polygon","authors":"S.V. Rasskazov, I.S. Chuvashova, T.A. Yasnygina, E.V. Saranina, A.A. Bokareva","doi":"10.26516/2541-9641.2023.2.91","DOIUrl":"https://doi.org/10.26516/2541-9641.2023.2.91","url":null,"abstract":"The purpose of this study is to establish relationship between a source for final eruptions on the Dzotol volcano and those for the whole preceded Late Cenozoic volcanism in the Dariganga field. Major oxides, trace elements, and Pb isotopic ratios in rocks of the volcanic field are indicative for generation of magmatic melts in a homogeneous mantle region. In final eruptions of the Dzotol volcano, rocks show, on the one hand, intermediate geochemical signatures relative to those of other Dariganga volcanic rocks, and, on the other hand, lower Pb isotope ratios. We infer that Dariganga volcanic rocks were derived due to deep degassing of the about 4.47 Ga protomantle and were dispersed at the asthenospheric–lithospheric boundary affected by transtension. The source for the final Dzotol rocks corresponded in depth to the central part of the magma-generating region and displayed the Pb-isotopic protomantle component, previously designated in rare Quaternary Dariganga rocks.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135319381","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: 10.26516/2541-9641.2022.2.174
A. Kitov, E. Ivanov, V.N. Nogovictin
The target expedition during the last decade of June to read these thermochrons is described, as well as the observation of features in comparison with the same period (the second decade of June) in 2014.
{"title":"The first expedition to Munku-Sardyk of 2020 and comparative features of the route","authors":"A. Kitov, E. Ivanov, V.N. Nogovictin","doi":"10.26516/2541-9641.2022.2.174","DOIUrl":"https://doi.org/10.26516/2541-9641.2022.2.174","url":null,"abstract":"The target expedition during the last decade of June to read these thermochrons is described, as well as the observation of features in comparison with the same period (the second decade of June) in 2014.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85485051","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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