Smirnov, S Z, Rybin, A V, Kruk, N N, Timina, T Yu, Sokolova, E N, Kuzmin, D V, Maksimovich, I A, Kotov, A A, Shevko, A Ya, Nizametdinov, I R, Abersteiner, A (2019) Parental Melts and Magma Storage of a Large-volume Dacite Eruption at Vetrovoy Isthmus (Iturup Island, Southern Kuril Islands): Insights into the Genesis of Subduction-zone Dacites. Journal of Petrology, 60 (7) 1349-1370 doi:10.1093/petrology/egz032
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Parental Melts and Magma Storage of a Large-volume Dacite Eruption at Vetrovoy Isthmus (Iturup Island, Southern Kuril Islands): Insights into the Genesis of Subduction-zone Dacites | ||
| Journal | Journal of Petrology | ||
| Authors | Smirnov, S Z | Author | |
| Rybin, A V | Author | ||
| Kruk, N N | Author | ||
| Timina, T Yu | Author | ||
| Sokolova, E N | Author | ||
| Kuzmin, D V | Author | ||
| Maksimovich, I A | Author | ||
| Kotov, A A | Author | ||
| Shevko, A Ya | Author | ||
| Nizametdinov, I R | Author | ||
| Abersteiner, A | Author | ||
| Year | 2019 (July 1) | Volume | 60 |
| Issue | 7 | ||
| Publisher | Oxford University Press (OUP) | ||
| DOI | doi:10.1093/petrology/egz032Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 176543 | Long-form Identifier | mindat:1:5:176543:8 |
| GUID | 0 | ||
| Full Reference | Smirnov, S Z, Rybin, A V, Kruk, N N, Timina, T Yu, Sokolova, E N, Kuzmin, D V, Maksimovich, I A, Kotov, A A, Shevko, A Ya, Nizametdinov, I R, Abersteiner, A (2019) Parental Melts and Magma Storage of a Large-volume Dacite Eruption at Vetrovoy Isthmus (Iturup Island, Southern Kuril Islands): Insights into the Genesis of Subduction-zone Dacites. Journal of Petrology, 60 (7) 1349-1370 doi:10.1093/petrology/egz032 | ||
| Plain Text | Smirnov, S Z, Rybin, A V, Kruk, N N, Timina, T Yu, Sokolova, E N, Kuzmin, D V, Maksimovich, I A, Kotov, A A, Shevko, A Ya, Nizametdinov, I R, Abersteiner, A (2019) Parental Melts and Magma Storage of a Large-volume Dacite Eruption at Vetrovoy Isthmus (Iturup Island, Southern Kuril Islands): Insights into the Genesis of Subduction-zone Dacites. Journal of Petrology, 60 (7) 1349-1370 doi:10.1093/petrology/egz032 | ||
| In | (2019, July) Journal of Petrology Vol. 60 (7) Oxford University Press (OUP) | ||
| Abstract/Notes | Abstract Detailed mineralogical and melt and fluid inclusion constraints on magma storage, and the evolution of melts, are presented for the large-volume caldera eruption on the Vetrovoy Isthmus on Itutrup Island (Kuril Islands, Russia). The shallow magma reservoir beneath the Vetrovoy Isthmus is composed of a mush of plagio-rhyolitic melt, phenocrysts and the products of peritectic reaction(s). The melt appears to have formed as a result of partial melting of previously erupted rocks, which probably had andesitic to basaltic compositions and were metamorphosed into amphibole-bearing assemblages. The breakdown of amphibole in the partially melted precursor rocks led to the formation of early Mg-rich clino- and orthopyroxene, along with plagioclase and Fe–Ti oxides, and the release of aqueous fluids. Variations in fluid pressure are recorded by a strong increase of An contents in plagioclase. Crystallization took place at around 850°C with pressure ranging from 0·9 to 3 kbar. This study demonstrates that dacitic magmas erupted during the course of a 20 kyr voluminous eruption were the result of mixing between plagio-rhyolitic partial melts and the breakdown reaction minerals (i.e. pyroxenes, plagioclase and Fe–Ti oxides). Plagioclase and quartz were the last minerals to crystallize from these melts prior to eruption. | ||
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