{"title":"Geochemical Characteristics of Melts from the Eastern Volcanic Belt and Sredinny Range of Kamchatka: An Analysis of Evidence from Melt Inclusions","authors":"M. L. Tolstykh, V. B. Naumov, A. V. Girnis","doi":"10.1134/S0742046324700593","DOIUrl":"10.1134/S0742046324700593","url":null,"abstract":"<p>We analyzed published datasets relating to the composition of glasses from melt inclusions in minerals of volcanics from the Eastern Volcanic Belt and Sredinny Range of Kamchatka. A significant difference was found between the distribution of silica concentration in the rocks and melts: intermediate and basic compositions are most common among the rocks, whereas the glasses in melt inclusions are predominantly acidic. The distribution of major and trace elements was analyzed. It was shown that the contents of some elements are environment-specific (e.g., Nb and light REEs). We identified trace element ratios in melts that most strongly correlate with the geodynamic setting.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"18 3","pages":"220 - 235"},"PeriodicalIF":0.7,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. L. Sobisevich, A. O. Agibalov, O. V. Bergal-Kuvikas, V. A. Zaitsev, D. S. Zykov, V. M. Makeev, A. V. Poleshchuk, A. A. Sentsov, A. V. Shevchenko
{"title":"Developing the Methods for Multidisciplinary Morphometric Analysis of Relief for Assessing the Tectonic Fragmentation of the Interior","authors":"A. L. Sobisevich, A. O. Agibalov, O. V. Bergal-Kuvikas, V. A. Zaitsev, D. S. Zykov, V. M. Makeev, A. V. Poleshchuk, A. A. Sentsov, A. V. Shevchenko","doi":"10.1134/S074204632470057X","DOIUrl":"10.1134/S074204632470057X","url":null,"abstract":"<p>The estimation of the degree of tectonic fragmentation for upper lithosphere following the method of Yu.V. Nechaev (2010) is based on calculations of specific lineament lengths. We used data for three regions—Northwest Caucasus, the Voronezh Anteclise, and the Malko–Petropavlovsk zone in Kamchatka—to test whether other morphometric parameters could be used: specific lengths of “weak” zones, elongation lines and water streams, as well as relief curvature. Their anomalies are confined to seismic areas and to areas of hydrothermal and magmatic activity. We show that the most information is provided by 3D models of tectonic fragmentation that incorporate specific lengths of “weak” zones and water stream lengths.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"18 3","pages":"251 - 260"},"PeriodicalIF":0.7,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sulfur in the Tephra of the ca. 1500 BP Opala Eruption, Kamchatka","authors":"S. B. Felitsyn, V. Yu. Kirianov","doi":"10.1134/S074204632470060X","DOIUrl":"10.1134/S074204632470060X","url":null,"abstract":"<p>Sulfur-containing ejecta of Plinian-type eruptions can be transported to great distances in gas pores of ash particles. The mean concentration of sulfur in the rhyolite tephra of the ca. 1500 BP Opala eruption is 310 ppm. The maximum concentration can reach 800 ppm. We have found a relationship between sulfur concentration in bulk samples and grain-size composition: sulfur is mostly found in the 0.25‒0.50 mm fraction consisting of elongate ash particles with elongate gas pores 1.0‒10.0 µm long. The most likely cause why sulfur concentration depends on the structure of ash particles consists in the fact that sulfur compounds of the water-soluble complex are preserved inside gas pores; sulfur-containing compounds that have been sorbed on the surface of ash particles were removed by precipitation during the time the tephra resided in continental settings. When ash particles that contain sulfur compounds on the inner surface of gas pores come into bottom sediments during Plinian-type eruptions like that on Opala Volcano ca. 1500 BP, that can affect the geochemistry of lithogeny and rearrange the mineral phases that are sensitive to the presence of oxide-sensitive agents in the sedimentary sequence during diagenesis.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"18 3","pages":"213 - 219"},"PeriodicalIF":0.7,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Båth’s Law Derived from Gutenberg-Richter’s Law: a Simple Deduction with Implications for Earthquake Sequence Analysis","authors":"Zhongliang Wu, Yue Liu","doi":"10.1134/S0742046324700544","DOIUrl":"10.1134/S0742046324700544","url":null,"abstract":"<p>We provide the derivation of Båth’s law from Gutenberg-Richter’s law with a simple deduction through Zipf distribution for a set of data exhibiting power law scaling. It turns out that <i>D</i>, the difference between the magnitude of the mainshock and that of the largest aftershock (or the second largest event in the mainshock-aftershock sequence) has positive correlation with the magnitude of the mainshock. The parameters of the aftershock sequence subject to analysis, including number of samples, cutoff magnitude, and <i>b</i>‑value, also contribute to <i>D</i> and its uncertainty. The uncertainty of <i>D</i> is even larger associated with the ‘dragon king’ events which are the statistical outlier of the power law scaling.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"18 3","pages":"290 - 294"},"PeriodicalIF":0.7,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Automatic Removal of Low Frequency Noise from Seismograms Using the Fingerprinting Method: Algorithms, Properties, Limitations","authors":"K. Yu. Silkin","doi":"10.1134/S0742046324700556","DOIUrl":"10.1134/S0742046324700556","url":null,"abstract":"<p>This paper describes a new method for automatic preparation of a noisy seismic record for further analysis using expert information systems. The method is based on seismogram fingerprints, which, due to their concise but informative pattern, allow the development of a reliable algorithm for finding important noise characteristics. The search for the optimal cutoff frequency for a high-pass filter is especially important under conditions of partial overlap of the signal and noise spectra, when the latter have high intensity. It is precisely this difficult case that this study aims to address. The article analyzes the methodology developed here in application to several hundred records of regional earthquakes and explosions. The analysis showed that reliable results can be achieved in more than 90% of the cases. In addition, the defects and limitations of the method are mentioned, which are logical consequences of its advantages. The Appendix to this article contains a detailed description of the algorithm underlying the method.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"18 3","pages":"275 - 289"},"PeriodicalIF":0.7,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Modeling a Potential Collapse on Koryaksky Volcano and Assessing the Volcanic Hazard for the Elizovo–Petropavlovsk Agglomeration, Kamchatka","authors":"A. A. Dolgaya, O. V. Bergal-Kuvikas","doi":"10.1134/S0742046324700568","DOIUrl":"10.1134/S0742046324700568","url":null,"abstract":"<p>Simulation of a potential collapse on Koryaksky Volcano showed the most likely direction of movement for a debris avalanche. The periodic fumarolic activation of the volcano provides evidence of the circulation of meteoric waters and of favorable conditions for replacement of the bedrock in the volcanic edifice resulting in landslide deposits. Satellite data were used to study surface ground deformation. The northeastern slopes of Koryaksky are rising relative to the subsiding southwestern slopes. Recalling that Koryaksky volcano stands at a distance of 10 km from Avachinsky Volcano which has produced massive explosive debris deposits during its history, the present study is of utmost urgency. The Elizovo–Petropavlovsk agglomeration (which includes the town of Elizovo and Petropavlovsk-Kamchatsky, as well as adjacent population centers in Elizovo District), which is in immediate vicinity of Koryaksky Volcano, harbors more than a half of all population of Kamchatka, as well as facilities that produce over half of all income in the region. Consequently, the assessment of naturally occurring processes on the volcano with a view to further development of a plan to minimize their negative impact is critically important for the economy of Kamchatka.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"18 3","pages":"261 - 274"},"PeriodicalIF":0.7,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. S. Zhegunov, A. V. Kutyrev, E. S. Zhitova, S. V. Moskaleva, P. E. Schweigert
{"title":"First Data on the Mineralogy of the Evevpenta Epithermal Silver–Gold Ore Occurrence, Kamchatka, Russia","authors":"P. S. Zhegunov, A. V. Kutyrev, E. S. Zhitova, S. V. Moskaleva, P. E. Schweigert","doi":"10.1134/S0742046324700489","DOIUrl":"10.1134/S0742046324700489","url":null,"abstract":"<p>The Evevpenta ore occurrence is situated in the northeastern part of the Central Kamchatka volcanic belt (Kamchatka Peninsula, Russia), and lies among andesitic volcanic complexes of the Neogene age. The ore bodies are veins, zones of quartz streaks, and hydrothermal breccias, accompanied by aureoles of argillization which transition into propylites at the periphery. The formation of noble-metal mineralization occurred through two phases: the hypogene (hydrothermal) phase and the hypergene phase. For the hypogene phase we have identified two mineral associations related to noble-metal mineralization: the Central area contains gold—telluride–quartz mineralization, while the Northern area hosts telluride–sulfide–quartz mineralization. The hypergene mineral association with native gold occurs within the Central area only. Based on data relating to the material composition of the ores we show that the Evevpenta ore occurrence is a typical member of epithermal reduction-alkaline or low sulfidation deposits.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"18 2","pages":"149 - 164"},"PeriodicalIF":0.7,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. V. Petrova, V. A. Rashidov, A. B. Perepelov, V. I. Silaev, L. P. Anikin, N. V. Gorkova, V. V. Mikheev
{"title":"Ore Elements and Minerals in the Sublimates of Alaid Volcano, Kuril Island Arc","authors":"V. V. Petrova, V. A. Rashidov, A. B. Perepelov, V. I. Silaev, L. P. Anikin, N. V. Gorkova, V. V. Mikheev","doi":"10.1134/S0742046324700465","DOIUrl":"10.1134/S0742046324700465","url":null,"abstract":"<p>This paper is concerned with sublimates sampled in 2013–2020 in the near-crater zone and on the slopes of Alaid Volcano situated in the Kuril island arc. It was found that the near-crater zone contains native metals confined to zones of acidic leaching where the original lavas and tuffs have been transformed into opal-like rocks or rocks that are sharply enriched in hydroxides of trivalent iron. These zones were found to contain native gold, palladium, silver, chrome, copper, zinc and alloys of gold and palladium, copper and zinc, copper and tungsten. The mineral nomenclature in sublimates on the Alaid slopes is broader, while the temperature of their generation is lower. The ore minerals are dominated by copper-containing ones, and sublimates have been found with vanadium-containing minerals that belong to water-containing oxides and to silicates of vanadium. We have identified two genetic types of slope sublimates: (1) minerals that have crystallized from hydrothermal or vapor-hydrothermal solutions near vents of near-surface fumaroles and (2) copper and ferrous colloform formations that were generated by settling from colloidal solutions in shallow water of drying reservoirs, including small and large pools.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"18 2","pages":"180 - 200"},"PeriodicalIF":0.7,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. G. Kalacheva, D. V. Melnikov, A. A. Dolgaya, E. V. Voloshina
{"title":"The Formation of the Chemical Composition of Karymsky R. Water As Affected by Hydrothermal and Volcanic Activity in Kamchatka","authors":"E. G. Kalacheva, D. V. Melnikov, A. A. Dolgaya, E. V. Voloshina","doi":"10.1134/S0742046324700490","DOIUrl":"10.1134/S0742046324700490","url":null,"abstract":"<p>This paper examines the Karymsky Volcanic Center to estimate how much volcanic and hydrothermal activity affects the chemical composition of river water. We evaluate the volumes of major and trace elements coming to the Pacific Ocean via the Karymsky River. We assess the quality of river water in compliance with the regulations for potable water, water used for household work, and in fisheries. It is shown that the formation of ion load of the river water mostly occurs by inflow of thermal waters, as well as due to water-soluble complexes of ashes discharged by Karymsky Volcano and coming to the catchment area of the river. The annual volume of dissolved material transported by the river to the Kronotsky Bay of the Pacific Ocean amounts to more than 90 kilotons.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"18 2","pages":"132 - 148"},"PeriodicalIF":0.7,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. A. Kakourova, V. I. Dzhurik, E. V. Bryzhak, V. M. Demyanovich
{"title":"Quasilinear Chains of Earthquakes in Clusters of Seismic Events: The Baikal Rift System","authors":"A. A. Kakourova, V. I. Dzhurik, E. V. Bryzhak, V. M. Demyanovich","doi":"10.1134/S0742046324700507","DOIUrl":"10.1134/S0742046324700507","url":null,"abstract":"<p>The identification of numerous quasilinear chains of earthquakes in the epicenter field of seismicity in the Baikal region and a study of these chains showed that the chains may include, not only chains of “migrating” earthquakes, but also those arising in a random space–time distribution of earthquakes. The present statistical study of the distribution of interepicenter distances showed that “migrating” chains may be formed within clusters of seismic events, and the distribution has been investigated. We note that chains in earthquake clusters can be identified based on the distribution of time, as well as from the distribution of distances. We have found the formation of earthquake chains in the areas of the following clusters of earthquakes: the Busingol earthquakes of 1976 and 1991; the South Baikal, the Kyakhta, and the Kichera earthquakes in the Tompuda sequence, the Oldongsin and Charuoda clusters. We showed that the chains were formed during the occurrence of these clusters. The areas of concentrated chains of clustered seismicity are found to have a relationship of the positions and directivity of the chains to the strike of fault zones, to near-fault cracks, and to the orientation of nodal planes at earthquake foci.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"18 2","pages":"119 - 131"},"PeriodicalIF":0.7,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141512295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}