The space-time relationships between volcanic associations of different alkalinities: The Belogolovskii massif in Kamchatka’s Sredinnyi Range. Part 1. The geology, mineralogy, and petrology of volcanic rocks

Flerov, G. B.; Perepelov, A. B.; Puzankov, M. Yu.; Колосков, А. В.; Filosofova, T. M.; Shcherbakov, Yu. D.

doi:10.1134/s0742046314030026

Cited by 5 publications

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References 5 publications

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“…8c). A similar model of a volcanic process that pro duces occurrences of magma of varying composition also applies to the remote past (Flerov et al, 2014), more spe cifically to the GTFE, where a hybrid (mixed) magma was discharged during the last phase in the eruption of the North Vent and during the initial phase of the South Vent eruption (Braitseva et al, 1984;Flerov et al, 1984).…”

Section: Discussionmentioning

confidence: 99%

The petrogenesis of rocks of the Ostryi and Ploskii volcanoes and the relationship between volcanic occurrences of basaltic and trachybasaltic magmas in the Tolbachik Dol area, Kamchatka

Flerov

Anan’ev

Ponomarev

2015

J. Volcanolog. Seismol.

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We developed a petrologic and geodynamic model for the magma generation of volcanic forma tions in the Tolbachik Dol area. Differences have been found in the evolution of volcanic ejecta and the min eral composition of rocks on Ostryi and Ploskii Tolbachik stratovolcanoes on the one hand and in that of the regional zone of cinder cones on the other. We conclude that the basaltic and the trachybasaltic magmas were generated independently of each other and that these magmas were mixed during the time when central vol canism was giving way to fissure volcanism. The leading process that was responsible for the generation of basaltic and trachybasaltic series was crystallization differentiation, while the compositional variation in the stratovolcano and cinder rocks can be explained by the supply of an alkaline component into the basaltic magma chamber and subsequent accumulation during magma crystallization.

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Section: Discussionmentioning

confidence: 99%

The petrogenesis of rocks of the Ostryi and Ploskii volcanoes and the relationship between volcanic occurrences of basaltic and trachybasaltic magmas in the Tolbachik Dol area, Kamchatka

Flerov

Anan’ev

Ponomarev

2015

J. Volcanolog. Seismol.

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“…The evolutionary trends for basalt compositions (Lutts, 1980) paleovolcanism as polygenic volcanic massifs that were formed in the geological past (Flerov and Seliverstov, 2008;Koloskov et al, 2011;Flerov et al, 2014Flerov et al, , 2016.…”

Section: Resultsmentioning

confidence: 99%

The Ploskie Sopki volcanic massif: Geology, petrochemistry, mineralogy, and petrogenesis (Klyuchevskoi Volcanic Cluster, Kamchatka)

Flerov

Churikova

Anan’ev

2017

J. Volcanolog. Seismol.

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Abstract⎯This paper is concerned with the geological history and petrology of a major polygenic volcanic edifice dating back to Upper Pleistocene to Holocene time. This long-lived volcanic center is remarkable in that it combines basaltic and trachybasaltic magmas which are found in basaltic andesite and trachybasaltictrachyandesite series. The inference is that the coexisting parent magmas are genetically independent and are generated at different sources at depth in an upper mantle volume. The associated volcanic rocks have diverse compositions, stemming from a multi-stage spatio-temporal crystallization differentiation of the magmas and mixing of these in intermediate chambers. DOI: 10.1134/S0742046317040030INTRODUCTION The information on the Ploskie Sopki massif can be found to varying degrees of detail in (Sirin, 1968;Piip, 1956;Ermakov, 1977;Flerov and Ovsyannikov, 1991;Churikova, 1990Churikova, , 1993Churikova and Sokolov, 1993;Churikova et al., 2001Churikova et al., , 2012Churikova et al., , 2013. Our studies supplied considerable corrections to the interpretation of the volcanic history for the formation of the massif and the associated petrogenesis. The Ploskie Sopki massif (Fig. 1) is the largest polygenic (as to morphology and geology) volcanic edifice in the Klyuchevskoi Volcanic Cluster. It is made of the paired edifices of the Late Pleistocene Ushkovskii (3943 m) and Krestovskii (4108 m) stratovolcanoes. The summit part of Ushkovskii Volcano and part of Krestovskii are truncated by a 4.5-km × 5.5-km collapse caldera, which includes two cinder cones, Kherts and Gorshkov, and is filled with a glacier. Krestovskii Volcano is a fragment of the volcanic cone that has been spared by the collapse, and which makes up the N-NW-W steep wall of the collapse cirque. The slopes of the massif abound in cinder and cinder-lava cones due to parasitic eruptions at different hypsometric levels. Some of these are along the periphery of Ushkovskii Volcano, while most of the cones are confined to a narrow zone striking SSW-NNE-NE, which traverses the top of the massif and its slopes, and can be followed for a distance of 60 km, with the width varying between 6 and 8 km. One peculiar feature of the massif consists in the presence of normal and high alkalinity volcanic rocks within a single edifice, which

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Volcanism of the southern part of the Sredinny Range of Kamchatka in the Neogene–Quaternary

Volynets

Певзнер

Tolstykh

et al. 2018

Russian Geology and Geophysics

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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 Range of Kamchatka: Khangar and Icha volcanic massifs and Mt. Yurtinaya on the “western” flank, Bystrinsky and Kozyrevsky Ridges on the “eastern” flank, and Anaunsky Dol and Uksichan massif located in between. We show systematic differences in the composition of rocks from the “western” and “eastern” flanks. During the Neogene, a typical island-arc volcanism took place within the “eastern” flank. Quaternary volcanic rocks of this area have both island-arc and within-plate geochemical features. We propose to call rocks of this type hybrid rocks. Within the “western” flank, hybrid volcanism has been manifested since the Neogene, while typical island-arc rocks are not found. Magma generation processes on the “western” flank of the Sredinny Ridge are influenced by an enriched mantle source; the effect of fluid is less pronounced here as compared to the rocks of the “eastern” flank, where it is clearly traced.

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The space-time relationships between volcanic associations of different alkalinities: The Belogolovskii massif in Kamchatka’s Sredinnyi Range. Part 1. The geology, mineralogy, and petrology of volcanic rocks

Abstract: A report of the Central Kamchatka Team on additional geological studies in previously surveyed areas to scale 1 : 200 000 and the preparation for printing of a set of the State Geological Map of the Russian Federation to scale 1 : 200 000 (second edition)

Cited by 5 publications

References 5 publications

The petrogenesis of rocks of the Ostryi and Ploskii volcanoes and the relationship between volcanic occurrences of basaltic and trachybasaltic magmas in the Tolbachik Dol area, Kamchatka

The petrogenesis of rocks of the Ostryi and Ploskii volcanoes and the relationship between volcanic occurrences of basaltic and trachybasaltic magmas in the Tolbachik Dol area, Kamchatka

The Ploskie Sopki volcanic massif: Geology, petrochemistry, mineralogy, and petrogenesis (Klyuchevskoi Volcanic Cluster, Kamchatka)

Volcanism of the southern part of the Sredinny Range of Kamchatka in the Neogene–Quaternary

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