New Data on the Age, Material Composition, and Geological Structure of the Central Kamchatka Depression (CKD). Part 2. The Mineralogical Composition of Volcanic Rocks and Mantle Xenoliths. Toward a Petrologic Model

Колосков, А. В.; Ananyev, V. V.

doi:10.1134/s0742046320030045

Cited by 4 publications

(1 citation statement)

References 17 publications

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“…It has been argued that such an acid-to-basic sequence observed in volcanic products is related to the existence of several inter-connected magma chambers at different depths [22,39]. These petrological observations were found to be consistent with independent geophysical data, e.g., [23,24,40,41]. Despite a large number of studies, the depth of the magma chamber(s) underneath the Bezymianny volcano is still an open question [20][21][22]25,36,37,39,[42][43][44][45].…”

Section: The Application Of Amp-tb21 To the Bezymianny Amphiboles And...supporting

confidence: 65%

Amp-TB2 Protocol and Its Application to Amphiboles from Recent, Historical and Pre-Historical Eruptions of the Bezymianny Volcano, Kamchatka

Ridolfi,

Almeev,

Ozerov

et al. 2023

Minerals

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This article reports a protocol on the application of Amp-TB2 (single-amphibole thermobarometry) based on detailed electron-microprobe analyses performed on homogeneous natural standards and synthetic glasses, and amphibole crystals (mostly phenocrysts) of volcanic products erupted by the Bezymianny volcano during its activity through time. The application of this protocol is facilitated by a new version of the model (Amp-TB2.1.xlsx) including an equation to identify heterogeneous domains (disequilibrium; not suitable for thermobarometric constraints) and homogenous (equilibrium) zones within amphibole crystals, which can be used to quantify the physicochemical parameters (i.e., pressure, P; temperature, T; volatile content in the melt, H2Omelt; oxygen fugacity, fO2) of “steady-state” magmatic crystallization. Application examples of the protocol, showing detailed core–rim microprobe data and physicochemical parameter variations in representative amphibole phenocrysts of the Bezymianny are also reported. The depth (and P) estimated by Amp-TB2.1 for this volcano are compared to seismic tomography results. Amp-TB2.1 results mainly show (1) that the Bezymianny is characterized by a very dynamic feeding system where the magma is stored at shallow crustal levels before recent activity periods characterized by climatic events and (2) that the pre-eruptive depth of magma storage generally increases with the age of the investigated products.

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Section: The Application Of Amp-tb21 To the Bezymianny Amphiboles And...supporting

confidence: 65%

Amp-TB2 Protocol and Its Application to Amphiboles from Recent, Historical and Pre-Historical Eruptions of the Bezymianny Volcano, Kamchatka

Ridolfi,

Almeev,

Ozerov

et al. 2023

Minerals

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“Black” Pyroxenites in Mantle Xenoliths Found in Volcanics of Some Regions in the East Asian Margin. The Evolution and Petrogenesis. Part 1. The Mineralogical Compositions, Conditions of Generation

Колосков

Ananiev

Федоров

2021

J. Volcanolog. Seismol.

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“Black” Pyroxenites in Mantle Xenoliths Found in Volcanics of Some Regions in the East Asian Margin. The Evolution and Petrogenesis. Part 2. The Petrologic-Geochemical Composition, toward a Petrogenetic Model

Колосков

Ananiev

Федоров

2021

J. Volcanolog. Seismol.

View full text Add to dashboard Cite

New Data on the Age, Material Composition, and Geological Structure of the Central Kamchatka Depression (CKD). Part 2. The Mineralogical Composition of Volcanic Rocks and Mantle Xenoliths. Toward a Petrologic Model

Cited by 4 publications

References 17 publications

Amp-TB2 Protocol and Its Application to Amphiboles from Recent, Historical and Pre-Historical Eruptions of the Bezymianny Volcano, Kamchatka

Amp-TB2 Protocol and Its Application to Amphiboles from Recent, Historical and Pre-Historical Eruptions of the Bezymianny Volcano, Kamchatka

“Black” Pyroxenites in Mantle Xenoliths Found in Volcanics of Some Regions in the East Asian Margin. The Evolution and Petrogenesis. Part 1. The Mineralogical Compositions, Conditions of Generation

“Black” Pyroxenites in Mantle Xenoliths Found in Volcanics of Some Regions in the East Asian Margin. The Evolution and Petrogenesis. Part 2. The Petrologic-Geochemical Composition, toward a Petrogenetic Model

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