Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions
We present a new dataset for whole-rock major, trace, isotopic, and phenocryst compositions indicating a genetic link between andesites of the Holocene eruptions of the Bezymianny stratovolcano (the Bezymianny stage), the andesitic to dacitic Late Pleistocene lava dome complex (the pre-Bezymianny st...
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ftinstvs:oai:repo.kscnet.ru:2546 2023-05-15T16:59:24+02:00 Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions Almeev Renat R. Kimura Jun-Ichi Ariskin Alexei A. Ozerov Alexey Yu. 2013 text http://repo.kscnet.ru/2546/ http://repo.kscnet.ru/2546/1/2013_Almeev-Bezy.pdf http://www.sciencedirect.com/science/article/pii/S0377027313000139 en eng http://repo.kscnet.ru/2546/1/2013_Almeev-Bezy.pdf Almeev Renat R. <http://repo.kscnet.ru/view/creators/Almeev=3ARenat_R=2E=3A=3A.html>, Kimura Jun-Ichi <http://repo.kscnet.ru/view/creators/Kimura=3AJun-Ichi=3A=3A.html>, Ariskin Alexei A. <http://repo.kscnet.ru/view/creators/Ariskin=3AAlexei_A=2E=3A=3A.html>, Ozerov Alexey Yu. <http://repo.kscnet.ru/view/creators/Ozerov=3AAlexey_Yu=2E=3A=3A.html> (2013) Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions // Journal of Volcanology and Geothermal Research. Vol. 263, pp. 141 - 171. doi:10.1016/j.jvolgeores.2013.01.003 <http://doi.org/10.1016/j.jvolgeores.2013.01.003>. 38.37.25 Вулканология Безымянный Ключевской Статья PeerReviewed 2013 ftinstvs https://doi.org/10.1016/j.jvolgeores.2013.01.003 2022-08-09T17:05:34Z We present a new dataset for whole-rock major, trace, isotopic, and phenocryst compositions indicating a genetic link between andesites of the Holocene eruptions of the Bezymianny stratovolcano (the Bezymianny stage), the andesitic to dacitic Late Pleistocene lava dome complex (the pre-Bezymianny stage), and the magnesian to high-alumina basalts of the adjacent Kliuchevskoi Volcano. We demonstrate that volcanic products from the Bezymianny stage of volcano evolution are most likely the products of magma mixing between silicic products of the earliest stages of magma fractionation and the less evolved basaltic andesite parental melts periodically injected into the magma reservoir. In contrast, the intermediate and silicic magmas of the pre-Bezymianny stage together with basalts from Kliuchevskoi much more closely resemble the liquid line of descent and may represent a unique prolonged and continuous calc-alkaline trend of magma evolution from high-magnesian basalt to dacite. As a result of the geothermobarometry, we recognize variable conditions of magma fractionation and magma storage beneath Bezymianny for different magma types during its evolution since the Late Pleistocene: (1) 1100–1150 °C, 500–640 MPa, 1–2.5 wt. H2O for parental basaltic andesite; (2) 1130–1050 °C, 700–600 MPa, 2.5–5 wt. H2O for two-pyroxene andesites; (3) 1040–990 °C, 560–470 MPa, 5–6.5 wt. H2O for orthopyroxene-bearing andesites; (4) 950–1000 °C, 450–150 MPa, 3.5–5.5 wt. H2O for hornblende-bearing andesites; and (5) 950–900 °C, 410–250 MPa, 6–7 wt. H2O for dacites. Repeated basalt injections and magma fractionation combined with internal mixing in the magma chamber are the main processes responsible for both the complex petrography and the geochemical trends observed in the lavas of Bezymianny Volcano. Text Kamchatka Institute of Volcanology and Seismology, Petropavlovsk-Kamchatsky: IVS FEB RAS Repository Journal of Volcanology and Geothermal Research 263 141 171 |
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Open Polar |
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Institute of Volcanology and Seismology, Petropavlovsk-Kamchatsky: IVS FEB RAS Repository |
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ftinstvs |
language |
English |
topic |
38.37.25 Вулканология Безымянный Ключевской |
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38.37.25 Вулканология Безымянный Ключевской Almeev Renat R. Kimura Jun-Ichi Ariskin Alexei A. Ozerov Alexey Yu. Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions |
topic_facet |
38.37.25 Вулканология Безымянный Ключевской |
description |
We present a new dataset for whole-rock major, trace, isotopic, and phenocryst compositions indicating a genetic link between andesites of the Holocene eruptions of the Bezymianny stratovolcano (the Bezymianny stage), the andesitic to dacitic Late Pleistocene lava dome complex (the pre-Bezymianny stage), and the magnesian to high-alumina basalts of the adjacent Kliuchevskoi Volcano. We demonstrate that volcanic products from the Bezymianny stage of volcano evolution are most likely the products of magma mixing between silicic products of the earliest stages of magma fractionation and the less evolved basaltic andesite parental melts periodically injected into the magma reservoir. In contrast, the intermediate and silicic magmas of the pre-Bezymianny stage together with basalts from Kliuchevskoi much more closely resemble the liquid line of descent and may represent a unique prolonged and continuous calc-alkaline trend of magma evolution from high-magnesian basalt to dacite. As a result of the geothermobarometry, we recognize variable conditions of magma fractionation and magma storage beneath Bezymianny for different magma types during its evolution since the Late Pleistocene: (1) 1100–1150 °C, 500–640 MPa, 1–2.5 wt. H2O for parental basaltic andesite; (2) 1130–1050 °C, 700–600 MPa, 2.5–5 wt. H2O for two-pyroxene andesites; (3) 1040–990 °C, 560–470 MPa, 5–6.5 wt. H2O for orthopyroxene-bearing andesites; (4) 950–1000 °C, 450–150 MPa, 3.5–5.5 wt. H2O for hornblende-bearing andesites; and (5) 950–900 °C, 410–250 MPa, 6–7 wt. H2O for dacites. Repeated basalt injections and magma fractionation combined with internal mixing in the magma chamber are the main processes responsible for both the complex petrography and the geochemical trends observed in the lavas of Bezymianny Volcano. |
format |
Text |
author |
Almeev Renat R. Kimura Jun-Ichi Ariskin Alexei A. Ozerov Alexey Yu. |
author_facet |
Almeev Renat R. Kimura Jun-Ichi Ariskin Alexei A. Ozerov Alexey Yu. |
author_sort |
Almeev Renat R. |
title |
Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions |
title_short |
Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions |
title_full |
Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions |
title_fullStr |
Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions |
title_full_unstemmed |
Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions |
title_sort |
decoding crystal fractionation in calc-alkaline magmas from the bezymianny volcano (kamchatka, russia) using mineral and bulk rock compositions |
publishDate |
2013 |
url |
http://repo.kscnet.ru/2546/ http://repo.kscnet.ru/2546/1/2013_Almeev-Bezy.pdf http://www.sciencedirect.com/science/article/pii/S0377027313000139 |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_relation |
http://repo.kscnet.ru/2546/1/2013_Almeev-Bezy.pdf Almeev Renat R. <http://repo.kscnet.ru/view/creators/Almeev=3ARenat_R=2E=3A=3A.html>, Kimura Jun-Ichi <http://repo.kscnet.ru/view/creators/Kimura=3AJun-Ichi=3A=3A.html>, Ariskin Alexei A. <http://repo.kscnet.ru/view/creators/Ariskin=3AAlexei_A=2E=3A=3A.html>, Ozerov Alexey Yu. <http://repo.kscnet.ru/view/creators/Ozerov=3AAlexey_Yu=2E=3A=3A.html> (2013) Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions // Journal of Volcanology and Geothermal Research. Vol. 263, pp. 141 - 171. doi:10.1016/j.jvolgeores.2013.01.003 <http://doi.org/10.1016/j.jvolgeores.2013.01.003>. |
op_doi |
https://doi.org/10.1016/j.jvolgeores.2013.01.003 |
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Journal of Volcanology and Geothermal Research |
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263 |
container_start_page |
141 |
op_container_end_page |
171 |
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1766051664790290432 |