Anna O. Volynets

Anna O. Volynets
Institute Of Volcanology And Seismology · Petrology, Geochemistry and Mineralogy

PhD

About

83
Publications
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317
Citations
Additional affiliations
September 2004 - August 2005
Georg-August-Universität Göttingen
Position
  • PhD Student
September 2002 - present
Institute Of Volcanology And Seismology
Position
  • Senior Researcher

Publications

Publications (83)
Article
Full-text available
Впервые получена серия из 10 изотопных K–Ar дат для лавовых центров Седанкинского Дола, расположенного в северной части Срединного хребта Камчатки. Установлено, что вулканизм в этом районе начал проявляться как минимум в среднем плейстоцене. Для доголоценового времени выделено четыре этапа активизация вулканизма (300–270, 180–160, 100–80 и между 50...
Article
For the first time, a series of 10 isotopic K-Ar ages was obtained for the lava centers of the Sedank-insky Dol, located in the northern part of the Sredinny Range of Kamchatka. We show that volcanism in this area started at least in the Middle Pleistocene. For the pre-Holocene time, four stages of volcanism activation were distinguished (300-270,...
Conference Paper
Full-text available
Pliocene-Quaternary volcanism in Kamchatka occurs in three volcanic chains parallel to the trench: Eastern volcanic front, Central Kamchatka Depression and the Sredinny Range (SR). Origin of Quaternary volcanism in the SR is controversial. Compositional variability of the SR volcanic rocks is explained by participation of several components in melt...
Article
We report the chemical and isotopic compositions of volcanic rocks of the Akhtang and Kostina mountain massifs in the Sredinny Range, Kamchatka. The analyzed rocks are similar in composition to the earlier studied volcanics of the eastern flank of the southern part of the Sredinny Range. Results of K–Ar isotope dating reveal three stages of volcani...
Data
Supplementary Table 1: Brief description of studied samples and their (or samples from the same eruption) whole-rock composition. Supplementary table 2: The dataset of spinel inclusions in olivine from volcanic rocks of Kamchatka. Supplementary table 3: Averaged composition of spinel inclusions in the Fo84-86 olivine for each sample. Supplementary...
Article
A first set of K–Ar isotopic ages obtained, which allowed to estimate the age of the largest volcanoes of the Anaunsky Dol (3.2, 2.2 and 1.9 Ma) and eruptive centers of the post-caldera stage of Uksichan massif (1.2 and 0.8 Ma), located in the Sredinny Range of Kamchatka. Significant time intervals separating the individual phases of volcanism sugg...
Article
Full-text available
K-Ar isotopic age of the beginning of formation of Ichinsky (0,35 Ma) and Khangar (0,4 Ma) stratovolcanoes is established for the first time, as well as the age of the final stage of activity of the Lauchan Ridge (about 0,9 Ma) in the Sredinny Range of Kamchatka. Probably the formation of the studied volcanoes may be caused by the generation of the...
Article
K-Ar isotopic age of the beginning of formation of Ichinsky (0.35 Ma) and Khangar (0.4 Ma) stratovolcanoes is established for the first time, as well as the age of the final stage of activity of the Lauchan Ridge (about 0.9 Ma) in the Sredinny Range of Kamchatka. Probably the formation of the studied volcanoes may be caused by the generation of the...
Article
Clusters of small-volume volcanoes that individually may be defined as monogenetic, but have interlinked and interconnected plumbing systems, are used to be categorized as monogenetic volcanic fields (MVF). We argue that such volcanic clusters should be distinguished as separate type of volcanism, intermediate between monogenetic and polygenetic. T...
Conference Paper
Full-text available
Стратовулкан Ичинский (55o68'N, 157o73'E, 3607 м) – крупнейшая вершина Срединного хребта Камчатки – подстилается эффузивами гор Лаучан, Палец и др. (далее хребет Лаучан). До сих пор было не известно, когда этот вулканический массив начал формироваться. Мы провели изучение и K-Ar датирование ранних порций лав стратовулкана и финальных лав хребта Лау...
Conference Paper
Full-text available
Получены первые результаты изучения химического состава продуктов извержений вулканических массивов Большой Чекчебонай и Большая Кетепана, расположенных в южной части Срединного хребта Камчатки.
Conference Paper
Full-text available
Изучен химический состав продуктов извержений вулканических массивов гор Ахтанг и Костина, расположенных на юго-восточном фланге южной части Срединного хребта Камчатки. По результатам K-Ar изотопного датирования для двух массивов впервые выявлены три этапа активизации вулканизма, разделенные продолжительными (1.4 и 2.4 млн лет) периодами покоя. В м...
Article
Based on the geochemical characteristics of the Miocene-Quaternary volcanic rocks of the Sredinny Range of Kamchatka, we divide it into northern and southern provinces; the latter comprises the “eastern”, “western”, and “central” flanks. We present new data on the composition of Neogene-Quaternary volcanic rocks in the southern part of the Sredinny...
Article
The Kamchatka volcanic arc (Russia) is one of best-studied, but most complex tectonic margins on Earth, with an extensive geologic history extending back to the Late Cretaceous. Unlike many other subduction zones, primitive basalts with Mg# > 65 are abundant in Kamchatka, thereby allowing characterization of the mantle source through compositional...
Conference Paper
Full-text available
Sredinny Range (SR) is the largest volcano-tectonic structure of the Kamchatka peninsula. It consists of the old (Cretaceous – Paleogene) metamorphic massif and volcanic belt, formed in Neogene-Quaternary (N-Q) times. Today, SR is about 400 km away from the contemporary trench. Benioff zone is located at 350-400 km depth in the southern part of SR,...
Conference Paper
Full-text available
Magmatic mixing processes are very important for the petrogenesis of the acid and intermediate rocks. Disequilibrium paragenesises and textural heterogeneity are usually considered as markers of such processes. Melt inclusions study allows one to get direct evidence of the coexistence of the several agents in the magmatic reservoir system. One of t...
Conference Paper
Full-text available
Tolbachinsky Dol (TD) is a large (length ~70 km, area 875 km2) monogenetic volcanic field (MVF) situated in the Central Kamchatka Depression in Kamchatka. Kamchatka subduction system is located at the north-western part of the Pacific at the convergent boundary of the Okhotsk and Pacific plates. Quaternary volcanism in Kamchatka occurs in three zon...
Conference Paper
Full-text available
One of the actual problems of the nature of monogenetic volcanism is a problem of its genetic relationship to the adjacent large polygenetic volcanoes. A comparison of the melt-forming environments using thermobarogeochemistry may serve as a possible way for the solution of this problem. We studied melt inclusions in minerals of lava and tephra of...
Conference Paper
Full-text available
Kamchatka subduction system is located at the north-western part of the Pacific at the convergent boundary of the Okhotsk and Pacific plates. The latter is presently subducting under Kamchatka at the rate of 8-9 cm/year (Scholl, 2007, etc.). Quaternary volcanism in Kamchatka occurs in three zones, parallel to the trench: Eastern Volcanic Front, gra...
Conference Paper
Full-text available
Monogenetic volcanic fields are frequently located in the faulted area and in clusters which are associated with the particular geometry of the magmatic chambers and structures of the magma plumbing system in the crust. The method of cluster analyses of the spatial distribution and morphometric characteristics of the cinder cones was used in our re...
Conference Paper
Full-text available
Срединный хребет – один из наименее изученных вулканических районов Камчатки. Большинство исследователей склоняются к тому, что в позднем миоцене-плиоцене в результате аккреции Кроноцкой дуги субдукция под СХ была заблокирована [4, 6 и др.]. У восточных берегов Камчатки образовалась новая зона погружения Тихоокеанской плиты, с которой связана совре...
Article
For the first time, the age of the beginning of the volcanic activity within Sredinny metamorphic Massif is determined (7–6 Ma). We suppose that this event was caused by the collision of Kamchatka with the Kronotsk arc that started about 7 Ma from accretion of Shipunsky peninsula. We demonstrate that at least two types of rocks were erupted within...
Article
Впервые определён возраст начала вулканической активности в пределах Срединно-метаморфи- ческого массива Камчатки (7–6 млн л.н.). Предположительно это событие было обусловлено кол- лизией Камчатки с Кроноцкой дугой, начавшейся ~ 7 млн л.н. с причленения Шипунского п-ва. Впервые установлено, что в позднем миоцене в пределах Срединного хребта Камчатк...
Conference Paper
Full-text available
1 , А.О. Волынец 2 1 Камчатский филиал ФИЦ ЕГС РАН, Петропавловск-Камчатский 683006, ku@emsd.ru 2 Институт вулканологии и сейсмологии ДВО РАН, Петропавловск-Камчатский Приведен обзор существующих взглядов на ареальный вулканизм, который по ряду параметров занимает промежуточное положение между полигенными и моногенными вулканическими образованиями....
Conference Paper
Full-text available
Sredinny Range of Kamchatka (SR), the largest volcano-tectonic structure of the peninsula, is composed from the old (Cretaceous-Paleogene) metamorphic massif and the volcanic belt, built in Neogene-Quaternary times. According to its structure and geomorphology, SR can be divided to the northern and southern parts. SRN (northern part of SR) is a nar...
Poster
Full-text available
Preliminary research of the geochemical features of the N-Q volcanic rocks of the southern part of SR shows that it has complicated geological history, with simultaneous participation of different types of the mantle sources in magma generation within the different, spatially separate areas. “Western” flank of SRsouth is characterized by the enrich...
Article
We present a broad overview of the 2012–13 flank fissure eruption of Plosky Tolbachik Volcano in the central Kamchatka Peninsula. The eruption lasted more than nine months and produced approximately 0.55 km 3 DRE (volume recalculated to a density of 2.8 g/cm 3) of basaltic trachyandesite magma. The 2012–13 eruption of Tolbachik is one of the most v...
Article
Full-text available
Abstract We present a reconstruction of the chronological sequence of events that took place during the first days of the 2012–2013 Tolbachik fissure eruption using petrological data and remote sensing methods. We were forced to use this approach because bad weather conditions did not allow direct observations during the first two days of the erupt...
Conference Paper
Full-text available
Tolbachinsky Dol, one of the largest zones of monogenetic volcanism in Kamchatka, has formed throughout the Holocene by numerous eruptions of high-Al sub-alkaline basalts and basaltic andesites, and since 2 ka also of high-Mg medium-K basalts. A new fissure eruption happened here at the end of November 2012; it lasted for 9 months and produced abou...
Conference Paper
Full-text available
The 1975-76 Tolbachik fissure eruption, Kamchatka is a multicentre basaltic eruption with the volume of erupted material about 2 km^3. One of the main features of this eruption is a sharp change in the rocks composition from high-Mg medium-K basalts to high-Al sub-alkaline basalts and basaltic trachyandesites with the basalts of the intermediate co...
Conference Paper
Full-text available
The 2012-2013 Tolbachik Fissure eruption started from lava gushing and effusion in the Menyailov vent on November 27 th , 2012; after three days the activity of this vent ceased and the eruption continued from the Naboko vent until its end in September 2013. The eruption produced about 0.7 km 3 of high-Al basaltic trachyandesites (Dvigalo et al., 2...
Conference Paper
Full-text available
The Sredinny Range of Kamchatka (SR) is located at the back-arc of the contemporary Kamchatka subduction zone (Avdeiko et al., 2006; Churikova et al., 2001; many others). The Benioff zone at the south end of the Range (below Khangar volcano) lies at 350 depth; further to the north it is not constrained by geophysical data (Gorbatov et al., 1997). A...
Conference Paper
Full-text available
New eruption on Tolbachik Dol (Fissure Tolbachik Eruption is called in honor of 50-year anniversary of IVS FEB RUS – FTE-50) began after 37 years of silence in this area of Klyuchevsky group of volcanoes. In the November 27, 2012 liquid basalts started to effuse extensively to the south of Plosky Tolbachik Volcano. One day prior to the eruption, a...
Conference Paper
Full-text available
Alexander Belousov (1), Marina Belousova (1), Benjamin Edwards (2), Anna Volynets (1), Dmitry Melnikov (1), Viktor Dvigalo (1), and Sergey Senyukov (3) (1) Institute of volcanology and seismology, Petropavlovsk, Russian Federation (belousov@mail.ru), (2) Department of geology, Dickinson College, PA, USA, (3) Kamchatka branch of geophysical survey,...
Conference Paper
Full-text available
Fissure eruption on the slope of Plosky Tolbachik volcano continued from November 27th, 2012 until September 2013. It was named as The Institute of Volcanology and Seismology 50th Anniversary Fissure Tolbachik Eruption. The eruption started from the 5 km-long fissure opening and continued with the intensive lava effusion from it. During the first t...
Article
Full-text available
First data on major, minor and trace element (XRF. ICP-MS) concentrations in the volcanic rocks of the IVS 50th anniversary Fissure Tolbachik eruption are reported for the period from 27.11.2012 to 25.01.2013; scheme of lava flows distribution by March 2013 is made. The volcanic rocks of the new eruption are substantially different from the other s...
Article
On 27 November 2012 at 1715 local time, a focused swarm of earthquakes was interpreted as the start of a new ongoing eruption on the south flank (Tolbachinsky Dol) of Plosky Tolbachik volcano in east central Kamchatka, Russia (Figure 1a) [Samoylenko et al., 2012]. Visual observations on 29 November showed ash shooting from two fractures as well as...
Article
Full-text available
New 40Ar/39Ar and published 14C ages constrain voluminous mafic volcanism of the Kamchatka backarc to Miocene (3–6 Ma) and Late Pleistocene to Holocene (\1 Ma) times. Trace elements and isotopic compositions show that older rocks derived from a depleted mantle through subduction fluid-flux melting ([20%). Younger rocks form in a back arc by lower m...
Conference Paper
Full-text available
Two geochemical transects were carried out through Kamchatka: one previously studied SE-NW across the arc and one SW-NE trending along the Sredinny Range (SR) back arc zone. These data with Ar-Ar dating constrain magma source in space and time and allows us to relate these to tectonic position setting of the region at a given time. The cross arc tr...
Conference Paper
Full-text available
Изучены составы оливин-шпинелевых парагенезисов и расплавных включений в оли- винах в трех породах из двух моногенных центров Ичинского вулканического узла: в ба- зальте и андезибазальте лавового потока Южный Черпук, образовавшегося 6500 14С лет назад (Певзнер, 2004), и в высоко-титанистом базальте г.Скалистая позднеплейстоценового возрас- та. Сост...
Conference Paper
Full-text available
Изучены составы оливин-шпинелевых парагенезисов и расплавных включений в оливинах пород двух моногенных центров Ичинского вулканического узла: в базальте и андезито-базальте голоценового лавового потока Южный Черпук, и в высоко-титанистом базальте г. Скалистая позднеплейстоценового возраста. Состав расплавных включений и минеральных парагенезисов Ю...
Conference Paper
Full-text available
Настоящая работа основана на двух геохимических пересечениях Камчатского полуострова, выполненных в течение последних тринадцати лет: (1) пересечение вкрест простирания Камчатской дуги в направлении ЮВ-СЗ и (2) продольное пересечение Срединного хребта в направлении ЮЗ-СВ. Результаты исследований по этим пересечениям совместно с первыми данными по A...
Conference Paper
Full-text available
Настоящая работа основана на двух геохимических пересечениях Камчатского полуострова, выполненных в течение последних тринадцати лет: (1) пересечение вкрест простирания Камчатской дуги в направлении ЮВ-СЗ и (2) продольное пересечение Срединного хребта в направлении ЮЗ-СВ. Результаты геохимических исследований по этим пересечениям, совместно с первы...
Conference Paper
Full-text available
Срединный хребет Камчатки – одна из крупнейших вулканических структур полуострова. Вулканические породы распространены от вулкана Хангар на юге и заканчиваются на Камчатском перешейке (~60° с.ш.). Таким образом, протяженность Центрально-Камчатского, вулканического пояса составляет около 800 км. По геохимическим данным все породы хребта характеризую...
Conference Paper
Full-text available
The results of this report are based on two transects which were carried out through Kamchatka peninsula during the last decade: (1) a SE-NW cross-arc transect and (2) a SW-NE Sredinny Range (SR) along-arc transect. These data together with the first Ar-Ar dating offer an opportunity to study the geochemical feature distribution of the volcanic roc...
Conference Paper
Full-text available
Quaternary volcanism in central Kamchatka develops in three zones, parallel to the trench: the Eastern Volcanic Front, the Central Kamchatka Depression, and the Sredinny Range (backarc). The Sredinny Range (SR) is located 400 km behind the trench. An active Benioff zone in SR, however, is observed only up to the latitude of the Holocene Ichinsky Vo...
Conference Paper
Full-text available
Срединный хребет Камчатки - одна из крупнейших вулканических структур полуострова. По геохимическим данным все породы хребта характеризуются типично островодужными признаками, но по принципиально разному составу лав разделяются на два основных типа.
Article
Full-text available
Miocene to Quaternary volcanic rocks of the northern Sredinny Range (SR) represent the northernmost extension of the back-arc in Kamchatka. New geochemical, isotopic and geochronological data of SR volcanic rocks allow the identification of three source components: (1) variably to strongly depleted N-MORB-type mantle with low Nb/HREE ratios (2) enr...
Conference Paper
Full-text available
Четвертичный вулканизм на Камчатке проявлен в трех зонах, параллельных глубоководному желобу: Восточный Вулканический Фронт (ВВФ); Центральная Камчатская Депрессия (ЦКД); и тыловая вулканическая зона, представленная Срединным хребтом (СХ). Типично островодужная геохимическая зональность в породах, опробованных от фронта дуги к тылу, наблюдается на...
Chapter
Full-text available
Срединный хребет Камчатки расположен в 400 км западнее современного Курило-Камчатского глубоководного желоба и протягивается от вулкана Хангар на юге до Корякского нагорья на севере, пересекая Алеутский трансформный разлом, по которому принято проводить северную границу субдуцирующей Тихоокеанской плиты, и продолжаясь еще более чем на 200 км на сев...
Chapter
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Contemporaneous volcanic activity in Kamchatka is a result of convergence of Eurasian and Pacific plates, the latter of which presently subducts at a rate of 8-9 cm/year. The northern boundary of this subduction zone is marked by the Bering transform fault zone. The Sredinny Range (SR) is located in the back-arc region some 400 km from the present...
Chapter
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Изучен вещественный состав продуктов моногенного и платовулканизма в Срединном хребте Камчатки. Срединный хребет представляет собой тыловую часть современной островодужной системы Камчатки. Согласно имеющимся данным северная часть Срединного хребта Камчатки считается стабильной, и субдукция в голоцене не происходит. Кроме того, на данной широте ни...
Article
Full-text available
Изучены содержания главных петрогенных и микроэлементов плейстоцен-голоценовых вулканических пород Срединного хребта Камчатки, опробованных вдоль Ю-В – С-З профиля от Ичинского вулкана на юге до вулкана Теклетунуп на севере, общей протяженностью более 200 км. В южной трети профиль представляет собой тыловую часть островодужной системы Камчатки. В р...
Conference Paper
Full-text available
Sedankinsky Dol is located in the northern part of Sredinny Ridge of Kamchatka back arc, on its western branch. It is built by a number of Hawaiian type shield volcanoes and numerous big and small monogenetic cones and their lava flows of Pleistocene and Holocene age (Dirksen et al, 2003). It is quite unexpected to find recent vigorous mafic volcan...
Chapter
Full-text available
Petrography, petrochemistry and geochemistry of rocks, as well as major, trace and volatile (F, Cl) elements content in melt and solid phase inclusions in olivines of monogenetic basalts of South Cherpouk and Mt. Skalistaya have been studied, which are situated in Sredinny Ridge of Kamchatka, south-westward of Ichinsky volcano, more then in 200 km...