Journal of Volcanology and Seismology最新文献

{"title":"Sulfides and Intermetallics in Mantle Peridotites from the Kamchatsky Mys (Eastern Kamchatka)","authors":"D. P. Savelyev,&nbsp;S. V. Moskaleva","doi":"10.1134/S074204632660021X","DOIUrl":"10.1134/S074204632660021X","url":null,"abstract":"<p>Mantle peridotites, rocks from the lower part of the ophiolite complex, were studied on the Kamchatsky Mys Peninsula (eastern Kamchatka). Cu and Ni sulfides, native copper, awaruite, and microinclusions of (Cu?)Pd₅In₂ were described in fresh (non-serpentinized) harzburgites. The structure and composition of the studied rocks support a primary (mantle) origin for the sulfides. Native phases formed by the reduction of metals from sulfides during the percolation of free hydrogen through the rocks. Hydrogen was released during serpentinization of mantle peridotites in the underlying slabs. The presence of a sulfide phase in the Kamchatsky Mys mantle peridotites may be related to their origin in a mantle plume-influenced environment.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"20 5","pages":"362 - 367"},"PeriodicalIF":0.9,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098089","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":"First Results of the Volcanological Multiparametric Automated Complex (VMAC) Operation on the Avachinsky Volcano","authors":"Ya. A. Bakhmatova,&nbsp;A. Yu. Ozerov,&nbsp;D. V. Melnikov","doi":"10.1134/S0742046326600269","DOIUrl":"10.1134/S0742046326600269","url":null,"abstract":"<p>The first results of the operation of the Volcanological Multiparametric Automated Complex (VMAC) on Avacha volcano (Kamchatka, Russia) are presented. Based on the analysis of waveforms and amplitude spectra, four repeating types of seismic events have been identified, which are classified as volcanic-tectonic and hybrid earthquakes. The obtained results demonstrate a high efficiency of continuous observations at the crater for recording low-energy seismicity and can be used for monitoring the volcano’s condition.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"20 5","pages":"322 - 330"},"PeriodicalIF":0.9,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098091","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":"Monitoring of the Avachinsky Volcano Crater Zone Using GNSS Observations and Unmanned Aerial Photography in 2020–2025","authors":"I. K. Mironov,&nbsp;K. M. Maguskin,&nbsp;V. M. Maguskin","doi":"10.1134/S0742046326600221","DOIUrl":"10.1134/S0742046326600221","url":null,"abstract":"<p>For the first time, <b>t</b>he results of monitoring the crater zone of Avachinsky volcano in 2020–2025 using GNSS observations and unmanned aerial photography are presented. It has been found that horizontal displacements of the stations do not exceed the errors of their determination (up to 3 cm/yr), while vertical displacements reach 6 cm/yr. Photogrammetric processing confirmed subsidence of the lava plug reaching 23 cm over the period 2023–2025.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"20 5","pages":"357 - 361"},"PeriodicalIF":0.9,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098092","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":"Permian–Triassic Volcanic Rocks, Central Part of the Okhotsk Terrane: Petrography, Geochemistry and Geochronology","authors":"V. N. Alexandrov,&nbsp;A. K. Khudoley,&nbsp;G. N. Ovsyannikov,&nbsp;V. B. Khubanov,&nbsp;V. A. Plaksina","doi":"10.1134/S0742046326600270","DOIUrl":"10.1134/S0742046326600270","url":null,"abstract":"<p>The Okhotsk terrane is one of the few regions of Russia that still remain poorly studied. In the central part of this terrane, successions of tuffs and ignimbrites have been identified; they formed within a previously unstudied segment of a Permian–Triassic volcanic arc. Most of the studied rocks are represented by interbedded tuffs and ignimbrites of different grain-size classes, from silt-sized and psammitic to fine-agglomeratic. Paleosoil layers with abundant plant detritus occur between volcanic successions. These rocks formed in an Andean-type active continental-margin setting developed directly on the Okhotsk terrane. The volcanic rocks are andesitic, dacitic and rhyolitic in composition. They most likely formed as a result of mixing between magmatic melts derived from the mantle wedge and from the melting slab; as a result, they show a positive europium anomaly and patterns similar both to the E-MORB trend and to the trend of the average upper crustal composition. U–Pb dating of the tuffs yielded ages of ca. 270, 267, 263 and 248 Ma, corresponding to the Permian and Middle Triassic. The studied volcanic rocks are probably part of the large Okhotsk–Taigonos belt, extending from Siberia and the Okhotsk terrane toward the Omolon terrane and farther to the northeast.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"20 5","pages":"305 - 321"},"PeriodicalIF":0.9,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098085","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":"The 2025 Activity of Kamchatka and Kurile Volcanoes and Their Danger to Aviation","authors":"O. A. Girina,&nbsp;A. G. Manevich,&nbsp;D. V. Melnikov,&nbsp;I. M. Romanova,&nbsp;A. A. Nuzhdaev,&nbsp;E. A. Loupian,&nbsp;A. A. Sorokin,&nbsp;L. S. Kramareva,&nbsp;S. P. Korolev,&nbsp;Yu. V. Demyanchuk","doi":"10.1134/S0742046326600245","DOIUrl":"10.1134/S0742046326600245","url":null,"abstract":"<p>In 2025, explosive eruptions of the Sheveluch, Klyuchevskoy, Bezymianny, Krasheninnikov, and Karymsky volcanoes occurred at Kamchatka, and of the Ebeko volcano at the Northern Kurile Islands. The strongest explosions of Sheveluch volcano with ash removal up to 10.5 km above sea level were recorded on May 16 and November 27, ash plumes and clouds extended, respectively, for 835 and 655 km to the northeast of the volcano. The explosive-effusive eruption of Klyuchevskoy volcano began on April 20 and continued till August 16, 2025. A paroxysmal phase of the eruption with ash ejection up to 12 km above sea level occurred continuously from August 6 to 12 (during 7 days) against the background of lava flows effusion, and ash plumes and clouds extended more than 1600 km, primarily to the east and southeast of the volcano. Paroxysmal eruptions of Bezymianny volcano occurred on April 23 and November 26, with ash removal reaching 13 and 12 km above sea level, respectively. The eruptive clouds moved more than 900 km to the southwest and south, and more than 2300 km to the east of the volcano, respectively. The first historical explosive-effusive eruption of Krasheninnikov volcano was detected at 16:39 UTC on August 2, 2025, in satellite images from the VolSatView information system by scientists from the KVERT. The effusive eruption of Krasheninnikov volcano continues up to this day. Explosive activity of the Karymsky volcano was observed from April 29 to August 27, 2025: explosions raised ash up to 4 km above sea level and ash clouds moved for 250 km, mainly to the east and southeast of the volcano. The explosive eruption of the volcano, which began on June 11, 2022, ended on January 13, 2025. During explosive eruptions, Sheveluch, Klyuchevskoy, and Bezymianny volcanoes were dangerous for international and local air travel, while Krasheninnikov, Karymsky, and Ebeko volcanoes were dangerous for local air travel.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"20 5","pages":"331 - 342"},"PeriodicalIF":0.9,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098087","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":"Erratum to: Likely Sources of Lithium Mineralization in Intersalt Deposits and a Hydrogeological Model for the Angara–Lena Deposit of Commercial Lithium-Bearing Brine in the Siberian Platform","authors":"A. G. Vakhromeev,&nbsp;M. A. Danilova,&nbsp;E. V. Demidova,&nbsp;S. K. Kvachko,&nbsp;A. V. Kiryukhin,&nbsp;A. T. Korolkov,&nbsp;A. V. Sergeeva,&nbsp;A. V. Oshchepkova,&nbsp;A. V. Levin,&nbsp;A. P. Gorokhov,&nbsp;A. S. Tsoi,&nbsp;V. V. Lukyanov","doi":"10.1134/S0742046326550014","DOIUrl":"10.1134/S0742046326550014","url":null,"abstract":"","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"20 5","pages":"392 - 392"},"PeriodicalIF":0.9,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098580","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":"Ecological-Geochemical Characteristics and Evolution of the Chemical Composition of Lake Karymsky after the Underwater Eruption in the Academii Nauk Caldera in January 1996 (Kamchatka Peninsula)","authors":"E. G. Kalacheva,&nbsp;E. V. Voloshina","doi":"10.1134/S0742046326600233","DOIUrl":"10.1134/S0742046326600233","url":null,"abstract":"<p>Based on the data acquired during the 2024 hydrochemical survey, taking into account previously published and archival material, the evolution of the chemical composition of Lake Karymsky was studied. The underwater eruption that occurred in the Academii Nauk caldera in 1996 had a significant impact on the hydrochemistry of the lake. It was seen as an increase in the concentration of all macrocomponents and a decrease in pH. Since 2015, there has been a stabilization of the chemical composition of the lake water. However, the concentrations of anions and cations remained higher compared to the data obtained before the onset of intensified volcanic activity. The lake water is enriched with a number of trace elements, including those that affect its quality. The trace elements were supplied by thermal waters that discharge along the coastline and at the bottom of the lake. Water quality does not meet the regulatory requirements for waters for domestic and drinking purposes; exceedances of maximum permissible concentrations (MPC) of harmful substances for waters for economic and fishery purposes have been recorded for a number of trace elements, including toxic ones (arsenic, boron).</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"20 5","pages":"343 - 356"},"PeriodicalIF":0.9,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098088","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":"The Chemical and Isotope Composition (H–O–C–S) of Hydrothermal Solutions and Gases in the Koshelevsky Volcanic Massif, Kamchatka, Russia","authors":"Yu. A. Taran,&nbsp;E. G. Kalacheva,&nbsp;E. V. Voloshina,&nbsp;S. N. Rychagov,&nbsp;A. V. Ermakov","doi":"10.1134/S0742046326600208","DOIUrl":"10.1134/S0742046326600208","url":null,"abstract":"<p>This paper presents results of 2025 sampling of steam vents and thermal waters in the Nizhne-Koshelevsky and Verkhne-Koshelevsky thermal fields. We considered macrocomponent composition of water (рН, SO₄, Cl, NH₄, and H₃BO₃) and the chemical composition of gases, including hydrocarbons up to C₆. We are the first to report data on the isotope composition of water, carbon in CО₂ and CН₄, sulfur in H₂S, and dissolved sulfate. We discuss possible factors that have affected the differences in the chemical and isotope compositions of fluids in the thermal fields of the Koshelevsky volcanic massif.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"20 5","pages":"368 - 379"},"PeriodicalIF":0.9,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098090","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":"Trends of Incoherent Elements in High-Magnesian Basalts of the Tolbachinsky Dol (Kamchatka) and the Possible Causes of Their Occurrence","authors":"R. I. Cherkashin,&nbsp;A. Yu. Ozerov,&nbsp;A. P. Maksimov","doi":"10.1134/S0742046326600191","DOIUrl":"10.1134/S0742046326600191","url":null,"abstract":"<p>This paper describes new data relating to the compositions of major and trace elements in carefully sampled high-magnesian basalts from eruptions of monogenic cone 1004, the second cone of the Northern Vent in the Great Tolbachik Fissure Eruption (GTFE), and Alaid Cone in Tolbachinsky Dol. The data on chemical composition showed that high-magnesian products of eruptions with constant content of major oxides show considerable variations in the concentrations of K₂O, P₂O₅, TiO₂, CaO and the entire range of incoherent trace elements (Ba, Rb, Zr, Ce, La, Lu, Y, Yb, Hf, Th and others). The variations in the concentrations of K₂O, P₂O₅ and of incoherent trace elements in the rocks reach a ratio of 2 and demonstrate direct correlation between themselves. The compositional data points in diagrams make continuous trends within the Tolbachinsky Dol high-magnesian basalts. These geochemical variations in high-magnesian basalts were for the first time described by us within the rocks of individual monogenic eruptions, as far as two types of lava in a single sample, which is inconsistent with the previous hypotheses of a deep-seated origin of these variations. We hypothesize a shallow (<i>h</i> = 2–10 km) character of formation for geochemically contrasting high-magnesian-magmas from an originally common high-magnesian magma as it was crystallizing in the source in situ. Such a process can probably have taken part in the formation of medium-K and high-K trends in the entire rock series of the Tolbachik volcanic massif.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"20 5","pages":"380 - 391"},"PeriodicalIF":0.9,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098086","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":"Alunite-Group Minerals of the Kuril-Kamchatka Suprasubduction Zone","authors":"A. N. Kupchinenko,&nbsp;E. S. Zhitova,&nbsp;P. S. Zhegunov,&nbsp;R. M. Sheveleva,&nbsp;E. Yu. Plutakhina,&nbsp;N. S. Vlasenko,&nbsp;M. A. Khokhlova","doi":"10.1134/S0742046326600166","DOIUrl":"10.1134/S0742046326600166","url":null,"abstract":"<p>Alunite-group minerals from various post-volcanic occurrences within the Kuril-Kamchatka suprasubduction zone, related to Alaid, Bolshoy Semiachik, Mutnovsky and Shiveluch volcanoes and Evevpenta and Vasilevo epithermal gold-silver ore occurrences, have been characterized by the combination of analytical techniques: electron-probe microanalysis, powder X-ray diffraction, and Raman spectroscopy. As a result, jarosite, alunite, natrojarosite, natroalunite and hydroniumjarosite have been found, among which natroalunite and jarosite being the most widespread. These minerals show strong genetic relation to K- and Na-feldspar, pyrite, and hematite. By chemical composition, they show a wide range of ratios for monovalent cations K/Ʃ<i>M</i>⁺. Regarding trivalent cations or Fe/(Fe + Al) ratio, both Fe³⁺- and Al-members are observed as well as rare varieties with intermediate Fe/(Fe + Al) ratios as 0.00–0.32 and 0.72–1.00. The alunite-group minerals from Shiveluch volcano contain Mg impurity up to 0.2 <i>apfu</i>, which is associated with the high Mg content of the host volcanic rocks (dacites and tephra). In individual samples Ca and P impurity is observed, substitution occurs according to the scheme <span>({text{SO}}_{4}^{{2 - }})</span> + <i>A</i>⁺ ⇔ <span>({text{PO}}_{4}^{{3 - }})</span> + <i>A</i>²⁺. For the first time for the alunite-group of the Kuril-Kamchatka zone, an admixture of hydroxonium (H₃O)⁺ in the position of a monovalent cation was determined by Raman spectroscopy.</p>","PeriodicalId":56112,"journal":{"name":"Journal of Volcanology and Seismology","volume":"20 4","pages":"259 - 276"},"PeriodicalIF":0.9,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148552900","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}